US2626082A - Resetting and interlock mechanism for liquid dispensing apparatus - Google Patents

Description

Jan. 20, 1953 H. N. BLISS ET AL 2,626,082

RESETTING AND INTEIRLOGK MECHANISM 4 FOR LIQUID DISPENSING APPARATUS Filed July 11, 1950 4 Sheets-Sheet 1 47/ a4 (95 ea Q-Ell 3mm HA2 VEY N 51115:; OTTO MLD, JR.

Jan. 20, 1953 H. N. BLISS ETAL RESETTING AND INTERLOCK MECHANISM FOR LIQUID DISPENSING APPARATUS 4 Sheets-Sheet 5 Filed July 11, 1950 gum/Mow HARVEY N BLISS OTTO VWZ/LD, JR

H. N. BLISS ET AL RESETTING AND INTERLOCK MECHANISM FOR LIQUID DISPENSING APPARATUS Jan. 20, 1953 4 Sheets-Sheet 4 Filed July 11, 1.950

HARVEYNBLJSS OTTO MLD, JR.

ATTORNEYS Patented Jan. 20, 1953 UNITED STATES QFFICE RESETTING AND INTERLOCK MECHANISM FOR LIQUID DISPENSING APPARATUS Application July 11, 1950, Serial No. 1"3,202

18 Claims. 1

The present invention relates generally to liquid dispensing apparatus and more particularly to an improved resetting means for a register oi the type utilized. in liquid dispensing apparatus and. including an interlock with the control means associated therewith.

It is an aim of the present invention to provide an automatic resetting mechanism for the register of a liquid dispensing apparatus, i. e. one which may be power-operated and whose operation may be initiated in a simple manner by the operator. at is a further aim of the invention to provide an automatic resetting mechanism of the character described which may be interconnected with the pump motor control and the hose nozzle support of the dispensing apparatus so as to provide automatic initiation of the operation of the pumping means if it is desired to commence a dispensing operation at the completion of resetting, and also so as to interlock these devices to prevent dispensing during resetting, and vice versa, and to prevent a subsequent dispensing operation following a previous dispensing operation unless the register is first reset to zero.

It also is an aim of the invention to provide an apparatus for accomplishing the abovedes-cribed purposes, which apparatus is of simple and effective design so that it may be easily fabricated and assembled with a minimum of difficulty and expense and which will be sufiiciently rugged and foolproof in operation so as to accomplish the desired aims in an efiicient manner over long periods of use.

Other objects will be in part obvious, and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplied in the construction hereafter set forth and the scope of the application of which will be indicated in the appended claims.

In the drawings:

Fig. 1 is a fragmentary front view of a liquid dispensing apparatus in which the mechanism of the present invention has been incorporated, the housing of the dispensing apparatus being in section so as to reveal the interior thereof;

Fig. 2 is an enlarged side view of the device of the present invention mounted in operative relationship on the frame of the register;

Fig. 3 is a plan View corresponding to Fig. 2;

Fig. 4 is a fragmentary side view of the apparatus of the present invention further en- .larged and with the side plate removed, the parts 2 being shown in the position occurring at the completion of a dispensing operation and before resetting;

Fig. 5 is a fragmentary view similar to Fig. l with the parts in the position occurring just prior to the completion of a resetting operation; and

Fig. 6 is a view similar to Fig. 5 with the parts in position occurring during a dispensing operation.

nrst to Fig. l of the drawings, there is s own somewhat diagrammatically a conventional liquid dispensing apparatus of the type widely used for dispensing gasoline. The apparatus is mounted in a suitable housing It! and includes a pump it, driven by an electric motor 12, the pump ll being connected at one end to a reservoir of liquid to be dispensed (not shown), and at the other end to a meter l3. The liquid pumped through the meter i3 is de livered to a flexible hose it, having at its outer end a conventional dispensing nozzle and valve 15. The meter i3 is connected by shaft l6 to a speed change mechanism or variator I! which, in turn, is connected to a register 20.

In the embodiment of the register shown in Fig. 1, the register has three sets of number wheels denoted at 25, 22, and 23 which can be viewed through windows 24, 25 and 26, respectively. A duplicate set of wheels and corresponding windows (not shown) are provided at the opposite end of the register. The number wheels 2| register the cost of the liquid dispensed; the number wheels 22 register the quantity of liquid dispensed; while the number Wheels 23 indicate the price per gallon at which the va riator and register are set to operate.

The register 28 of itself does not form a part of the present invention and the register may be any one of the types widely used in liquid dispensing apparatus such as that shown, for example, in the patent to Slye No. 2,264,557, granted December 2, 1941. Additional details of the construction of the register 20, if desired, may be obtained by reference to said Slye patent. Those portions of the register required in order to describe the present invention are shown, however, in Figs. 2 and 3 of the drawings.

Referring to Figs. 2 and 3, it will be seen that the sets of number wheels 2! and 22 are mounted at the ends of the register frame 21 on reset shafts 38, which remain stationary during a registering operation but which are adapted to be rotated in order to return the number wheels to zero position as viewed through the windows 24 and 25. The reset shafts 3B are connected for simultaneous rotation by a main reset shaft 3!. It will be noted that the ends of the reset shafts 33 have fixed thereto driven gears 32 in mesh with idler gears 33. A driving gear attached to the end of the main reset shaft 35 meshes with the idler gears 33 at the top of the register and also drives the idler gears 33 at the bottom of the register through intermediate gears 35 and 36.

The number of wheels 2! and 22 are mounted on the reset shafts 39 so that they may be freely rotated in a registering direction relative to the shafts, but when the shafts are turned in a registering direction, means is provided for causing the shafts to pick up the number wheels and return them to zero. The means whereby the reset shafts pick up the number wheels and return them to zero has been omitted from the drawings and the present description in the interests of brevity since such means are well known in the art and are described, for example, in the Slye Patent No. 2,264,557, previously referred to.

The driving means for driving the number wheels 2! during a dispensing operation is best shown in Fig. 3 of the drawings. As there shown, the number wheels are provided with driven gears 49 fixed to the side of each wheel, respectively. The driven gears til of the number wheels of lowest order are driven through idler gears di by driving gears 62 fixed to a transverse shaft 43 centrally of the register. The shaft s2 is connected through a clutch i l and bevel gear 55 with a bevel gear d secured to the cost drive shaft d? coming from the variator. A similar arrangement is provided for driving the number wheels 22 of lowest order from the volume drive shaft of the variator (not shown). The number wheels of higher order in each case are advance in a stepwise fashion by the usual transfer means which, as illustrated in the drawings, may co1nprise mutilated pinions d8 disposed on auxiliary shafts 49 so that each meshes with the driven gears 43 of the adjacent number wheel of higher L order and also with a two-toothed driving gear 50 secured to the adjacent number wheel of lower order.

When the number wheels 2! and 22 are advanced to zero position by rotation of the reset shafts, as previously described, the gear trains operating on the driven gears of the number wheels of lowest order will also be driven in a registering direction, this being permitted by the clutches id previously described. In order to prevent any movement from being transmitted to the variator, each of the clutches as is provided with an associated brake 5! which can be operated to lock the variator drive shafts against rotation. The brakes 5| are urged to a released position by springs 52 and may be actuated by connecting arm 53 fixed to a transversely positioned brake operating shaft 54.

The portions of the register thus far described. are all shown in the SM; Patent No. 2,264,557, previously referred to, and this description is repeated here merely by way of background and to assist in the full understanding of the functioning of the apparatus of the mechanism of the present invention hereinafter described.

Referring to Fig. 1 of the drawings, it will be seen that the apparatus of the present invention is mounted for the most part on a base plate 63 attached to the register frame and an upright side plate 65 extending upwardly therefrom and connected to the frame of the register by a post E32. Journaled at the top of the side plate 6! is a stub shaft 63 which is connected to the brake operating shaft 54, previously referred to. The outer end of the stub shaft 63 is provided with a coupling 54 by means of which the shaft G3 may be connected through an extension to a coupling 66 provided on the interior of a shaft ti extending through the housing 10 and provided at its outer end with an operating handle 68. As will be thus apparent, the operator can readily engage the brakes 5! of the register by turning the operating handle 68.

In accordance with the invention, the operation of the handle $8 for applying the brakes 5! simultaneously initiates the operation of the resetting mechanism. As best shown in Fig. 4 of the drawings, there is pinned to the shaft 53 a yoke is, in the bifurcated end of which there is received a roller 'i! which is mounted on an elongated plate 92 pivoted to the frame at '33. Turning of the shaft 53 and hence the yoke it in a clockwise direction as viewed in the drawings will cause the elongated plate 72 to pivot in a counter-clockwise direction. Attached to the outer end of the elongated plate 12 and to the frame of the register is a spring it which urges the elongated plate in a clockwise direction.

Mounted on opposite sides of the elongated plate i2 are a pair of rollers denoted at E6 and l? which cooperate with notched discs 78 and '59, respectively. The notched disc '88 is fixed to the main reset shaft 3! while the notched disc 79 is freely rotatable on a stud 89 secured to the register frame.

The notched disc 73 is rotated at a l to 2 speed ratio with respect to notched disc 78 by reason of a pinion 8| fixed to the reset shaft 3! and a gear 82 fixed to the notched disc 19. When the device is in its at rest position, i. e. at all times except during a resetting operation, the notches i8 and 79 of the discs '13 and T9 are positioned so as to receive the rollers 16 and 1?, as best shown in Fig. 4 of the drawings. The engagement of the rollers 76 and T! at the notches l3 and is of discs 18 and 79, respectively, will of course halt a resetting operation by preventing turning of themain reset shaft 3! until the rollers it and ii are again disengaged.

As previously mentioned, the turning of handle 68 through the yoke causes pivoting movement of the elongated plate '12 sufiicient to disengage the rollers 16 and T! from the notches l8 and is, which thus conditions the apparatus for a resetting operation. At the same time the turning of the handle 68 causes the closing of a switch 85 for energizing a reset motor 86. As shown in Fig. 2 of the drawings, the'shaft G3 which is turned by the handle 68 is provided with an arm 87 provided with a set screw 88 for engaging the switch 85. The set screw 88 may be adjusted so that the reset motor switch 85 is closed in proper timing relationship, i. e. when the rollers it and have been sufficiently disengaged from the notched disc 78 and i9 to free the apparatus for a resetting operation. The switch 85 is biased into open position so that when it is not engaged by arm 8?, the reset motor is turned ofi.

The reset motor 86 is mounted on the plate 6i: and is adapted to turn the main reset shaft 3!. Fixed to the end of the reset motor shaft til is a pinion 9! which meshes with a gear 92 to which is fixed a pinion 93, the gear 92 and pinion 93 being rotatably supported on a stud 94. The pinion 93 meshes with the toothed periphery of a driving plate 95 of a clutch 96 which is supported on a stud IIII fixed to the plate 6|. As best shown in Fig. 3, the clutch 99 comprises a hub 91 rotatably supported on stud If and coupled to the reset shaft, a pair of friction discs 93 on opposite sides of the driving plate 95, and a resilient spider 99 which urges the assembly into frictional engagement, the spider 99 being adjustable by nuts I99. By the driving means just disclosed, the reset motor 88 will drive the main reset shaft 3i at a reduced rate of speed and the clutch 93 normally provides sufficient friction to cause driving of the reset shaft and thus the resetting mechanism. However, when turning of the resetting mechanism is prevented, a at the end of a resetting operation, the clutch 99 will harmlessly absorb the driving force of the reset motor 89.

It thus will be seen that, when the operator turns the handle 98, he will first cause pivoting movement of the plate I2, thus disengaging the rollers 16 and H from the notched discs I8 and 79, respectively, and then turn on the reset motor 86 by closing the switch 85. Thereupon the reset motor 99 will turn the reset shaft 3| through two complete revolutions (causing one revolution of the notched disc 79) whereupon the rollers I6 and T! will again be received in the notches I8 and 19, respectively, thus halting the resetting operation. The resulting pivoting movement of the plate 72 also returns the shaft 61 and operating handle 68 to initial position, thus releasing the pressure on switch 85, thus permitting the switch 85 to open and turn off the reset motor. Any coasting of the reset motor will be absorbed, of course, by the clutch 96.

In addition to the notched discs I8 and 79 for halting the resetting operation, additional stop means may be employed to ensure that the numher wheels 2! and 22 will be accurately reset to zero during a resetting operation. As best shown in Figs. t and 5 there is provided a projection I39 on the gear 42 which is adapted to be engaged by the nose of a stopping lever I37 which is pivotally mounted on the reset shaft 3|. The opposite end of the stopping lever I3? is provided with a stud I38 which is urged into engagement with the periphery of a cam I39 by a spring I49. The cam I 39 is fixed to the notched disc I9 by a lost motion connection comprising a pin I4I extending into an enlarged aperture I42.. The cam I39 is so formed that the stopp ng lever I31 will ride on the high point I43 of the cam and thus he cammed into stopping position for engaging the projection I39 at the end of a resetting operation. At this point, of course, the notched disc 79 will be turned to a rotated position such that the roller I? will enter the notch I9. When this occurs, the roller 'I'I will engage aga nst a shoulder I44 on the cam I39, thus turning the cam in a reverse direction sufiicient to permit the stud I38 to move off the high point I43 of the cam, thus unlocking the register wheels and drive.

acco ance with the pre ent invention, the 1. ave-c. cribed resetting mechanism is intercted with the control of the main pump also interlocked so as to be responsive position of the hose nozzle I5. As shown l of the drawings, the main pump motor is provided with a switch I92 which is connected by a connecting rod I93 with the end of a control lever I94 pivotally mounted on the shaft The upper end of the rod I03 extends through a spring Hi5 which at its lower end abuts against a bracket I06 secured to the plate 59 and at its upper end abuts against a collar I9! fixed t0 the rod. As a result, the rod I93 and the control lever I94 are urged in a direction for closing the main motor switch I3.

Pivoting movement of the control lever I94 in a direction for permitting the main motor switch I92 to be closed may be prevented by several agencies. It will be noted that the lever I04 is provided with a projection III] which, as best shown in Fig. 5 of the drawings, will engage against the roller 7? when a resetting operation is in progress, i. c. with the roller '2? riding on the periphery of the notched disc 19. It is thus ensured that the main pump motor I2 cannot be turned on during a resetting operation. At the completion of a resetting operation, when the roller TI is received in the notch 19', the lever I94 is free to turn to the position shown in Fig, 6 of the drawings which is the position in which the main pump motor is turned on. As best shown in Fig. 6, the projection IIG on the lever I04 now extends above the roller I? and thus effectively prevents the roller from being moved out of the notch i9. Accordingly, it is impossible to initiate a resetting operation while the main pump motor is in operation. In summary, therefore, the apparatus of the present invention is constructed and arranged so that it is impossible to initiate a dispensing operation while a resetting operation is in progress and, conversely, it is impossible to initiate a resetting operation while a dispensing operation is in progress.

Pivoting movement of the lever Ifi 'i, such as to permit the main pump motor switch to be closed, may also be prevented by a holding pawl H2 which is pivoted on the register frame 2'. and which is biased by a spring I I3 into engagement with a shoulder H4 on the control lever 49%. In accordance with the invention, the holding pawl I I2 is adapted to be disengaged from the shoulder H4 as an incident to a resetting operation. The mechanism employed is an unlocking pawl i I5 pivotally mounted on the plate 52 and biased by a spring H6 for engagement with a notch I IT in the tail of the holding pawl I i2. As a result of the arrangement shown, pivoting of the elongated plate "I2 to initiate a resetting operation will cause the unlocking pawl IIE to engage the holding pawl H2 as best shown in Fig. 5 of the drawings. Then at the end of a resetting operation, when the rollers 56 and '1'? enter the notches i8 and I9, thus permitting clockwise pivoting of the elongated plate I2 under the influence of spring M, the unlocking pawl H5 bears on the tail of the holding pawl i i2 and disengages the holding pawl I it from the control lever i94 thus freeing the latter for pivoting movement such as to permit closing of the main pump motor switch. This condition is best shown in Fig. 6 of the drawings. The arrange ment of the notch II! and the nose of the unlocking pawl I I5 is such that they will be cammed out of engagement at the completion of the clockwise pivoting of the elongated plate I2, whereupon the holding pawl III! will merely ride on the periphery of the control lever It until the lever is again returned to switch open position.

A further restriction upon pivoting movement 5 the control lever led may also be imposed y a slide I'iil which is mounted for horizontal sii ing movement on the register frame by means of pins MI and elongated. slots I22. The slide I28 is urged in a left-hand direction as viewed in the drawings by means of a spring I23. It also is connected for operation by a thrust plate 25 pivotally mounted at the nozzle support I255. Thearrangement'of the thrust plate 125 and nozzle support IZfi is's'uch that, in order to place the nozzle lion the support, it is necessary to move the thrust plate I25 inwardly as shown in Fig. l of the drawings. The thrust plate I25 is connected by a rod I21 to one end of a bell crank i28 which, in turn, is connected at the other end by a rod I29 to the slide I29. By means of these connections, placing the nozzle on the nozzle support will result in the slide 129 being moved to the fullest extent possible in a right-hand direction as viewed in the drawings. Conversely, when the nozzle is removed from its support, the spring I 23 will return the slide I21? to the initial position.

As shown in the drawings, the lower edge of the slide I20 is provided with a notch I 35 in which is received a finger I3I made integral with the control lever I04. As a result, when the hose nozzle is on its support, thus moving the slide I 20 to its right-hand position (this position being shown in Fig. i of the drawings) the finger 3| will engage against the end of the notch lit, thus effectively preventing the control lever ltd from pivoting such as to turn on the main motor switch. However, if the hose nozzle is oil the support, which permits the slide I20 to move to the left-hand position shown in Figs. 5 and 6, the notch I34! will be so positioned that it will not interfere with finger HI and thus control lever IM. The primary purpose of notch I39 and finger I 3|, however, is to permit the main motor switch to be opened when the nozzle is placed on its support, thereby finally terminating a dispensing operation. As will be apparent, the resulting movement of the slide I20 to the righthand position shown in Fig. 4 by bearing against the nger I 31 will turn the control lever I8 3 against the influence of spring i 35, thus opening the main motor switch I62.

In order to further ensure that the control lever I03 cannot be turned to the on position when the nozzle is on its support, there is provi'ded at the left-hand end of the slide I26 a shoulder I36 against which the upper end of the unlocking pawl I15 is adapted to engage, in the event a resetting operation is initiated when the hose nozzle is on its support, 1. e. when the slide I28 is in the right-hand position shown in Fig. 4 of the drawings. The abutment of the unlocking pawl [I5 against the shoulder I34 prevents it from pivoting under the influence of spring I I5 I into engagement with the notch I I? or" the holding pawl I I2. Accordingly, at the end of the resetting operation and if the hose nozzle is still on its support, the unlocking pawl H5 cannot engage the holding pawl I I2 and thus disengage the holding pawl H2 from the shoulder I Id of the control lever I94.

As a result of the mode of operation of the mechanism as above described, it will be apparent that the operator cannot turn on the main pump motor unless he resets the register by turning the handle 68 and also removes the nozzle from its support. The operator may reset the register at any time without removing the nozzle from its support but this will not cause the main pump motor to turn on. Accordingly, the operator, if he prefers, may reset the register to zero immediately after a preceding dispensing operation and without waiting until such time as a second dispensing operation is carried out. Al

though the operator may have reset the register to zero previously, he must repeat the resetting operation in order to turn on the pump motor because the holding pawl 'I I2 can be disengaged only in this manner. It thus is ensured that there can be no subsequent dispensing operation without first resetting the register to zero.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the in vention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

We claim as our invention:

7 1. In a liquid dispensing apparatus, a register provided with reset means including a rotatable reset shaft, a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, pivotally mounted means engageable with the reset means when the reset shaft isin zero position for locking the reset shaft in such position, means biasing the locking means into locking position, means movable with the locking means for closing the reset motor switch when the locking means is in unlocking position and for opening the reset motor switch when the locking means is in locking position, manually operable means for moving the locking means to unlocking position to initiate a resetting operation, and clutch means in said driving connection means for permitting overrunning of the reset motor at the completion of a resetting operation.

2. In a liquid dispensing apparatus, a register provided with reset means including a rotatable reset shaft, a reset motor, means providing driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a member having a notch rotated by the reset shaft, 2-. pivoted locking member biased into engagement with said notch, said members being constructed and arranged so that engagement of the locking member with the notch occurs at full reset position of the reset shaft, manually operable for moving the locking member to unlocking position, means movable with the locking memher for opening the reset motor switch when the locking member is in engagement with the notch and for closing the reset motor switch when the locking member is moved to unlocking position, and clutch in said driving connection means for permitting overrunning of the reset motor at the completion of a resetting operation.

3, in a liquid dispensing apparatus, a register provided with a rotata'ble reset shaft, a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a rotatable notched disc, means operated by the reset shaft for driving the disc at a rate of speed such that the rate of speed of the reset shaft is a multiple or the rate of speed of the disc, a pivotal control member biased toward the disc having a follower for engaging in the notch at the completion of a resetting operation to lock the reset shaft against rotation and for riding on the periphery of the disc during a resetting operation, manually operated means for pivoting the control member to disengage the follower from the notch, and means movable with the control member for closing the reset motor switch when the follower is disengaged from the notch and for opening the switch when t .e follower is engaged in the notch.

l. In a liquid dispensing apparatus, a register provided with reset means including a rotatable reset shaft, driving means for the register pro vided with a brake, a reset motor connected to the reset shaft, a switch for controlling the operation of the reset motor, a movable member engageable with the reset means when the reset shaft is in zero position for locking the reset shaft in said position, means biasing the movable member into locking position, means movable with the movable member for closing the reset motor switch when the movable member in unlocking position and for opening the reset motor switch when the movable member is in looking position, and manually operable means for applying the brake and for moving the movable member to unlocking position to initiate a resetting operation.

5. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a liquid pump, power means for actuating the pump, and a switch for controlling the operation of the power means, the combination therewith of a reset motor, means providing a driving connection between the reset motor the reset shaft, a switch for controlling the operation of the reset motor, a movable member operative when the reset shaft is in an initial rotated position for locking the reset shaft in such rotated position, means biasing the movable member into locking position, manually operable means for moving the movable member into unlocking position, means operated by the movable member for closing the reset motor switch when the movable member is in unlocking position and for opening the reset motor switch when the movable member is in looking position, a power control lever connected to the said power means switch for opening and closing the switch, and means for mounting the power control lever in position such that movement of the said movable member to unlocking position is prevented by the power control lever when latter is in switch closed position, and movement of the power control lever to switch closed position is prevented by the said movable memher when the latter is in unlocking position.

6. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a pump, an electric motor for actuating the pump, and a switch for controlling the operation of the motor, the combination therewith of a reset motor, means providing a driving connec tion between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a movable member operative when the reset shaft is in an initial rotated position for locking the reset shaft in such rotated position, means biasing the movable member into locking position, means operated by the movable member for closing the reset motor switch when the movable member is in unlocking position and for opening the reset motor switch when the movable member is in looking position, manually operable means for moving the movable member into unlocking position to initiate a resetting operation, a power control lever connected to the said pump motor switch, means for mounting the power control lever in position such that movement of the lever to switch closed position is prevented by the said movable member when the latter is in unlocking position, means for latching the power control lever in switch open position, and means operated by the movable member for unlatching said latching means when the movable member is moved from unlocking osition into locking position.

'7. In a liquid dispensing apparatus of the type having a register provided with a reset shaft, a dispensing hose provided with a nozzle, a support for the nozzle, a pump, a pump motor, and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a movable member operative when the reset shaft is in an initial rotated position for looking the reset shaft in such rotated position, means biasing the movable member into locking position, means operated by the mova le member for closing the reset motor switch when the movable member is in unlocking position and for opening the reset motor switch when the movable member is in looking position, manually operative means for moving the movable member into un locking position to initiate a resetting operation, a power control lever connected to the said pump motor switch, means biasing the power control lever into switch closed position, means for preventing movement of the control lever into switch closed position when the movable member is in unlocking position, means for latching the power control lever in switch open position, means for unlatching the latching means when the movable member is moved from unlocking position into locking position, and means operable when the hose nozzle is on its support for rendering said last-named means inoperable.

8. In a liquid dispensing apparatus, of the type having a register provided with a reset shaft, a dispensing hose provided with a nozzle, a support for the nozzle, a pump, a pump motor, a switch for controlling the operation of the pump motor, means for driving the register in response to operation of the pump, and a brake for the driving means, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a movable member operative when the reset shaft is in an initial rotated position for locking the reset shaft in such rotated position, means biasing the movable member into locking position, means operated by the movable member for closing the reset motor switch when the movable member is in unlocking position and for opening the reset motor switch when the movable member is in looking position, manually operative means for applying the brake and for moving the movable member into unlocking position to initiate a resetting operation, a power control lever connected to the said pump motor switch, means biasing the power control lever into switch closed position, means for preventing movement of the control lever into switch closed position when the movable member is in unlocking position, means for latching the power control lever in switch open position, means for unlatching the latching means when the movable member is moved from unlocking position into locking position, and means actuatable by placaeeaoee ii ing the hose nozzle on its support for holding the power control lever in switch open position.

9. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a dispensing hose provided with a nozzle, a support for the nozzle, a pump, a pump motor, and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft,

a switch for controlling the operation of the reset motor, a pivotally mounted locking member operative when the reset shaft is in an initial rotated position for locking the reset shaft in such position, means biasing the locking member into locking position, means operated by the locking member for closing the reset motor switch when the locking member is in unlocking position and for opening the reset motor switch when the looking member is in looking position, manually operable means for moving the locking member into unlocking position to initiate a resetting operation, a power control lever connected to the pump motor switch, means for pivotally mounting the power control lever in position such that movement of the power control lever to switch closed position is prevented by the locking member when the latter is in unlocking position, a slide biased into a first position, means for moving the slide to a second position when the hose nozzle is placed on its support, and means on the slide for moving the power control lever to switch open position when the slide is moved to said second position.

10. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a dispensing hose provided with a nozzle, a support for the nozzle, a pump, a pump motor, and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a pivotally mounted locking member operative when the reset shaft is in an initial rotated position for locking the reset shaft in such position, means biasing the locking member into locking position, means operated by the locking member for closing the reset motor switch when the locking member is in unlocking position and for opening the reset motor switch when the locking member is in looking position, manually operable means for moving the locking member into unlocking position to initiate a resetting operation, a power control lever connected to the pump motor switch, means for pivotally mounting the power control lever in position such that movement of the power control lever to switch closed position is prevented by the locking member when the latter is in unlocking position, a slide biased into a first position, means for moving the slide to a second position when the hose nozzle is placed on its support, latching means for latching the power control lever in switch open position, means operated by the locking member when the latter is moved from unlocking position to locking position for unlatching the latching means, and means on the slide for preventing the operation of said unlatching means when the slide is in said second position.

11. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a dispensing hose provided with a nozzle, a support for the nozzle, a pump, a pump motor, and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a pivotally mounted locking member operative when the reset shaft is in an initial rotated position for locking the reset shaft in such position, means biasing the locking member into locking position, means operated by the looking member for closing the reset motor switch when the locking member is in unlocking position and for opening the reset motor switch when the locking member is in looking position, manually operable means for moving the locking member into unlocking position to initiate a resetting operation, a power control lever connected to the pump motor switch, means for pivotally mounting the power control lever in position such that movement of the power control lever to switch closed position is prevented, by the locking member when the latter is in unlocking position, and movement of the locking member to unlocking position is prevented by the power control lever when the latter is switch closed position, a slide biased into a first position, means for moving the slide to a second position when the hose nozzle is placed on its support, means on the slide for moving the power control lever to switch open position when the slide is moved to said second position, latching means for latching the power control lever in switch open position, means operated by the locking member when the latter is moved from unlocking position to looking position for unlatehing the latching means, and means on the slide for preventing the operation of said unlatching means when the slide is in said second position.

12. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a pump, a pump motor, and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a movably mounted plate, rotatable means driven by the reset shaft for maintaining the plate in a first pivoted position except when the reset shaft is in an initial rotated position, means biasing the plate into a second position, means con-. nected to the plate for closing the reset motor switch when the locking member is in said first position and for opening the reset motor switch when the plate is in said second position, manually operable means for moving the plate into said second position to initiate a resetting operation, a power control lever connected to the pump motor switch, means for pivotally mounting the power control lever in position such'that movement of the power control lever to switch closed position is prevented by the plate when the latter is in said first position, and movement of the plate to said first position is prevented by the power control lever when the latter is in switch closed position.

13. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a pump, a pump motor, a switch for controlling the operation of the pump motor, means for driving the register rcSPOnsive to operation of the pump, and a brake for the register driving means, the combination therewith of a reset motor, means providing a driving connection between the reset'motor and the-reset shaft, a switch for controlling theoperation of the re-,

set motor, a movably mounted plate, rotatable means driven by the reset shaft for retaining the plate in a first position except when the reset shaft is in an initial rotated position, means urging the plate into a second position, means for locking the reset shaft against rotation when the plate is in said second position, means connected to the plate for closing the reset motor switch when the plate is in said first position and for opening the reset motor switch when the plate is in said second position, manually operable means for applying the brake and for moving the plate to said first position to initiate a resetting operation, a power control lever connected to the pump motor switch, means for mounting the power control lever for movement in a path such that movement of the power control lever to switch closed position is prevented by the plate when the latter is in said first position and movement of the plate to said first position is prevented by the power control lever when the latter is in switch closed position, means biasing the power control lever into switch closed position, and manually controllable means for holding the power control lever in switch open position.

14.1n a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a pump, a pump motor and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a movably mounted plate, rotatable means driven by the reset shaft for retaining the plate in a first position except when the reset shaft is in an initial rotated position, means urging the plate into a second position, means for locking the reset shaft against rotation when the plate is in said second position, means connected to the plate for closing the reset motor switch when the plate is in said first position and for opening the reset motor switch when the plate is in said second position, manually operable means for moving the plate to said first position to initiate a resetting operation, a power control lever connected to the pump motor switch, means for mounting the power control lever for movement in a path such that movement of the power control lever to switch closed position is prevented by the plate when the latter is in said first position and movement of the plate to said first position is prevented by the power control lever when the latter is in switch closed position, means biasing the power control lever into switch closed position, latching means for latching the power control lever in switch open position, means operated by the plate for unlatching the latching means when the plate is moved from said first position to said second position, and manually controllable means for preventing the operation of said unlatching means.

15. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a pump, a pump motor and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a rotatably mounted disc having a notch in the periphery thereof, means forming a driving connection between the reset shaft and a disc, a movably mounted plate, a roller on the plate adapted to engage the periphery of the notched disc and to be received in the notch thereof, means urging the plate into such engaging position, means for locking the reset shaft against rotation when the plate is positioned with the roller thereof in the notch of the notched disc, means connected to the plate for closing the reset motor switch when the plate is positioned with its roller in the notch of said notched disc and for opening the reset motor switch when the plate is positioned with its roller on the periphery of said disc, manually operable means for moving the plate to disengage the roller from said notch to initiate a resetting operation, a power control lever connected to the pump motor switch, means for mounting the power control lever for movement in a path such that movement of the power control lever to switch closed position is prevented by the plate when the latter is in position with its roller engaging on the periphery of the notched disc and movement of the plate to disengage the roller thereof from the notch of the notched disc is prevented by the power control lever when the latter is in switch closed position, means biasing the power control lever into switch closed position, and manually controllable means for holding the power control lever in switch open position.

16. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a pump, a pump motor and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motona rotatably mounted disc having a notch in the periphery thereof, means forming a driving connection between the reset shaft and the disc, a movably mounted plate, a roller on the plate adapted to engage the periphery of the notched disc and to be received in the notch thereof, means urging the plate into such engaging position, means for looking the reset shaft against rotation when the plate is positioned with the roller thereof in the notch of the notched disc, means connected to the plate for closing the reset motor switch when the plate is positioned with its roller in the notch of said notched disc and for opening the reset motor switch when the plate is positioned with its roller on the periphery of said disc, manually operable means for moving the plate to disengage the roller from said notch to initiate a resetting operation, a power control lever connected to the pump motor switch, means for mounting the power control lever for movement in a path such that movement of the power control lever to switch closed position is prevented by the plate when the latter is in position with its roller engaging on the periphery of the notched disc and movement of the plate to disengage the roller thereof from the notch of the notched disc is prevented by the power control lever when the latter is in switch closed position, means biasing the power control lever into switch closed position, latching means for latching the power control lever in switch open position, means for unlatching the latching means operated by the plate when the plate is moved to engage the roller thereof in the notch of the notched disc, and manually controllable means for preventing the operation of said unlatching means.

1'7. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a dispensing hose provided with a 15 nozzle, a support for the nozzle, a pump, a pump motor and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of the reset motor, a rotatably mounted disc having a notch in the periphery thereof, means forming a driving connection between the reset shaft and the disc, a movably mounted plate, a roller on the plate adapted to engage the periphery of the notched disc and to be received in the notch thereof, means urging the plate into such engaging position, means for locking the reset shaft against rotation when the plate is positioned with the roller thereof in the notch of the notched disc, means connected to the plate for opening the reset motor switch when the plate is posi tioned with its roller in the notch of said notched disc and for closing the reset motor switch when the plate is positioned with its roller on the periphery of said disc, manually operable means for moving the plate to disengage the roller from said notch to initiate a resetting operation, a power control lever connected to the pump motor switch, means for mounting the power control lever for movement in a path such that movement of the power control lever to switch closed position is prevented by the plate when the latter is in position with its roller engaging on the periphery of the notched disc and movement of the plate to disengage the roller thereoi from the notch of the notched disc is prevented by the power control lever when the latter is switch closed position, means biasing the power control lever into switch closed position, latching means for latching the power control lever in switch open position, means for unlatching the latching means operated by the plate when the plate is moved to engage the roller thereof in the notch of the notched disc, and means operated by placing the hose nozzle on its support for moving the power control lever to switch open position and for preventing the operation of said unlatching means.

18. In a liquid dispensing apparatus of the type having a register provided with a rotatable reset shaft, a dispensing hose provided with a nozzle, a support for the nozzle, a pump, a pump motor and a switch for controlling the operation of the pump motor, the combination therewith of a reset motor, means providing a driving connection between the reset motor and the reset shaft, a switch for controlling the operation of 16 forming a driving connection between the reset shaft and the disc, at movably mounted plate, a roller on the plate adapted to engage the periphery of the notched disc and to be received in the notch thereof, means urging the plate into such engaging position, means for locking the reset shaft against rotation when the plate is positioned with the roller thereof in the notch of the notched disc, means connected to the plate for opening the reset motor switch when the plate is positioned with its roller in the notch of said notched disc and for closing the reset motor switch when the plate is positioned with its roller on the periphery of said disc, manually operable means for moving the plate to disengage the roller from said notch to initiate a resetting operation, a power control lever connected to the pump motor switch, means for mounting the power control lever for movement in a path such that movement of the power control lever to switch closed position is prevented by the plate when the latter is in position with its roller engaging on the periphery of the notched disc and movement of the plate to disengage the roller thereof from the notch of the notched disc is prevented by the power control lever when the latter is in switch closed position, means biasing the power control lever into switch closed position, latching means for latching the power control lever in switch open position, means for unlatching the latching means operated by the plate when the plate is moved to engage the roller thereof in the notch of the notched disc, a slide biased into a first position, means for moving the slide to a second position when the hose nozzle is placed on its support, means on the slide for moving the power control lever to switch open position and for preventing the operation of said unlatching means when the slide is moved to said second position, means operated by placing the hose nozzle on its support for moving the power control lever to switch closed position and for preventing the operation of said unlatching means. I V

HARVEY N. BLISS. OTTO WILD, JR.

anrssanops CITED The following references are of record'i'n the file of this patent:

UNITED STATES PATENTS Number Name Date 1,866,523 Alexander July 12, 1932 2,109,352 Hazard Feb. 22, 1938 r 2,336,381 Woodford et al. 'Dec. 7, 1943

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