US2012178A - Dishwashing machine - Google Patents

Description

Aug. 20, 1935. G, ANDERSON DISHWASHING MACHINE 4 Sheets-Sheet 1 Filed April 4, 1932 G. ANDERSON 2,012,178 DISHWASHING MACHINE Filed April 4, 1932 4 Sheets-Sht 2 7' r 11a 105 I 119 924 3 9 7a 707. 5 I

1935- G. ANDERsoN' 2,012,178

, DISHWASHING MACHINE F iled April 4, 1952 4 Sheets-Sheet s O 6km,

INVENTOR.

Aug.- 20, 1935. e, ANDERSON DISHWASHING'MACHINE v Filed April 4, 19;:

4 Sheets-Sheet 4 INVEN TOR PM Patented Aug. 20, 1935 UNITED STATES PATENT OFFICE msnwasnmo MACHINE Gideon Anderson, Pa. Application April 4, 1932, Serial No; 602,959

1': Claims. (Cl. 299-27) This invention relates to dish washing machines.

One of the primary objects of this invention is to provide a dish-washing machine in which the 5 water used for washing is forced successively and automatically throughseveral spraying devices adapted to spray the water at difl'erent points upon the dishes to bewashed. Another object of this invention is to provide a dish-washing ma-,

l chine of the sprayer type in which the direction operation, of compact construction and whichis especially well suited for home use. Yet another object of this invention relates to a special type of adjustable hose connection whereby the dishwashing may be readily connected to mostany kind of faucet used on kitchen sinks and the like.

Additional features and advantages of this invention will appear in the following description considered in connection with the accompanying drawings forming a part of this application.

In the drawings:

Fig. 1 is an end view of the operating mechanism and piping of the dish-washing machine.

Fig. 2 is a cross-sectional view taken along various planes through the operating mechanism.

Fig. 3 is a fragmentary side view of one of the oscillating sprayers of the dish-washing machine.

- sprayer taken on line 44 of Fig. '7. 4

Figs- 5 and 6 are fragmentary sectional views showing two operative positions of the hand operated two-way valve of the device.

Fig. 7 is a fragmentary cross-section through one of the oscillating sprayers.

Fig. 8 is a top. plan view of a flap valve. for the air-vent of the soap container of the device.

Fig. 9 is a fragmentary side elevation of the valve operatingv mechanism of the cylinder and cooperative parts of the machine.

Fig. 10 isa similar view of said valve mechanism in a different operative position. Fig.11 is a top plan view of Fig. 10.

Figs. 1'2"and 13 are rear elevational views of said cylinder valve, the rearcover being removed. 7

Fig. 4 is a cross-section through the oscillating Fig. 14 is a front elevation of the lever of said cylinder .valve. v

Fig. 15 is a side elevation of Fig. 14.

.Fig. 16 is a fragmentary-section through a kitchen-sink with the dish-washing machine '5 placed thereon.

Fig. 17 is a fragmentary view of a wire tray for holding plates and the like in the machine.

Fig. 18 is a fragmentary sectional view showing one method of .sealing the doors of the casing Fig. 19 is an isometric view, partly in section of the dish-washing machine.' I

1 'I am aware of theexistence of several types of dish-washing machines in which the dishes to be washed are subjected to jets of water issuing 15 from stationary or oscillating spraying devices. To the best of my knowledge, these spraying devices are all operated simultaneously with the result that the hydrostaticpressure of the jets -oi water is greatly reduced owing to the sub- 20 division of the water from the supply faucet into so many sprays and also due to the resistance offered by the many apertures in the sprayers.

This drop in hydrostatic pressure greatly impairs the effectiveness of the cleaning water, requires more time to do the cleaning and accordingly wastes considerable water.

In my device the spraying system is divided into groups of relatively few jets, which groups are. brought successively and automatically into action against the dishes to be washed, thus overcoming the above mentioned deficiencies.

Reference being had to the drawings, a dish washing machine built in accordance with thisinvention comprises as main elements a box-like casing B; a manually operated two way valve V, a cylinder and cylinder valve mechanism C, a distributor valve D, a soap receptacle R, a plurality of oscillating sprayers'S. and a plurality of stationary sprayers S'.- These various elements are Q partly or fully contained in a special compartmentor chamber L provided at one casing B. Y

j' B I This casing is preferably of rectangular shape and made of metal suitably treated, asby en amelling or paint to protect it against corrosion. Hinged doors I and 2 are respectively provided at the top and front for putting the dishes into or outof the casing.- The latter has feet or skids 3, preferably provided with a lining 4 of yielding material, such as rubber, to prevent marring the surface upon which the device is set. The cups and plates or other flat dishes are held in suitend of the I Operating valve f V This valve is of the two-way type and comprises a valve body l8 within which is .rotatably mounted the plug-valve ll manually operable by means of a handle 12. The body has four pipe hubs I3 I3 l3 and l3 into which pipes to be described hereafter are secured, and a drain hole 14 positioned intermediate the hubs 13 and I3 Cylinder and cylinder valve "(7 As shown in particular in Figs. 9 to 15, this valve comprises a valve-body l5 having a cylindrical valve-chamber l8 and a-cylinder head l1 into which is secured the vertical cylinder 18,

open at the top. The valve chamber communicates with the cylinder by a duct 20, said chamber being also provided with a drain-hole 21; Water may circulate through the valve chamber by way of the inlet port 22 (Fig. 11) and outlet port 23 the latter being drilled substantially. normal to the flat bottom of said chamber. Rotatably mounted centrally of the valve-body is a pivotpin 24 at the inner end of which is secured the valve-plate 25 having two holes 25 and 21 adapted to register respectively with the duct 20 and with the outlet-port 23. The valve plate is slidably held against the bottom of the valve chamher by the bolt-nut'28 and the spring washer 29 (Fig. 2).

On the outer end of the pivot-pin 24 is rotatably mounted a lever 30 havingat the outer end an angularly disposed arm 3| in which is cut an elongated arcuate slot 32, while the inner end of said lever is slotted as at 33 .to produce the two extensions 34 and 35. A tension spring 38 having one end secured to a point of attachment 31 on the lever 30 and the other end secured to a stationary point 38 provided on the boss 39 cast on the valve body is used to snap the lever upwardly as soon as the longitudinal axis of the spring moves above the center of the pivot pin.

' Placed intermediate the lever 30 and the valve body is the valve-trigger 40'suitably held on the pivot pin for rotation therewith. This trigger has two angularly disposed arms 41-; 42, the former being adapted to cover the drain hole 24 and the latter having an outwardly directed lug 43 placed Within the slot 33 and adapted to be engaged by the inner edge of either lever- extension 34, 35. Suitable aperturecl lugs 44 are provided on the valve-body for securing same at any-desired place in the casing-chamber L. i

A piston 45 of any suitable design allowing for angular movement as well as longitudinal movement' operates withixnthe cylinder. In the present embodiment, a cup-shaped leather piston 46 is used which is secured in any suitable'manner to the piston-rod 41.

Distributing valve D This valve is automatically operated by the up and down movements of the piston 45, by means of the distributor lever 48, the long arm 49 of which is hingedly connected to the outer end of the piston rod 41.

The distributing valve comprises the valvebody 58 having a cylindrical valvechamber 5| with a flat bottom and closed by a suitable coverv 52. Circumferentially of the valve body are uni-. forrnly disposed ducts 53 (twelve in this embodiment) which terminate at right angles intothe bottom of the valve-chamber to form the concentrically disposed and evenly spaced ports 54. Pipes, to bedescribed later, connect the ducts 53 with the various spraying devices. I

A valve-shaft 55 is rotatably supported by the cover 52 and valve body and is held in place by a nut 56 screwed on the threaded shank 51 at the rear end of the shaft. The distributor-lever 48 can, rotate freely about this shaft and is held at the front end thereof by another nut 58 engaging the threaded shanl; 59. Mounted on the shaft and rotating therewith is the valve-disc 58 which is yieldingly'held against the bottom of the chamber by the spring-washer 6|. I This disc has a hole 62 adapted to register successively with all the ports. 54.

The distributor-lever has an enlarged hub 83 from which radiate, in this embodiment, the four arms 64, 65, 86 and 51. Upon this hub is also rockably mounted at 68 a pawl 89 acted upon by a spring 18 secured at its outer end in the apertured lug 1| on arm 84. This lever is acted upon by a spring I08 which tends to rotatelt in a clockwise direction. Said spring is secured at one end to the arm 49 and at the other end to a stationary lug I59 suitably fastened in the chamber L. Also hingedly secured to the arm'49 is a connectinglink i2l having at its lower end a pin I22 which slidably engages the slot 32 of the lever 38 on the cylinder-valve C.

On the shaft. is keyed or otherwisesecured, the ratchet wheel .12 having the same number of teeth as there are ports '54 (twelve in this case) in the valve body. I

Oscillating sprayers "S In the present embodiment four such sprayers are disposed substantially in the corners of the lever 48.

As shown especially in Fig. 7, the housing 18 has two annular chambers 83 and 84 which communicate respectively with the inner and outer spray-tubes 13 and 14 via the ports 85 and 86 provided in the plug 15, and the chambers have outlets 81 and 88 to which are connected pipes, to be specified hereafter. Suitable gaskets 89 are used to maintain sealing contacts of the plug with the housing.

The end of the larger and shorter spray tube 14 is closed onto the inner tube as. at 98 and the inner tube is also closed at its outer end as at 9l. The spray-holes 92 in the tube 14 are preferably drilled in staggered and angular relation in a special strip 93 of metal, such as bronze, soldered to the said, tube to prevent the sprays from ad- Soap receptacle R? This receptacle as shown in Figs. 2 and 8 in particular consists of a casing 96 secured to the inner wall of the compartment L by screws 91 and to the outer wall thereof by a clamping collar 98 screwed on the casing. A screw threaded cap 99 closes the outwardly protruding end of the casing. The soap holder I00 is centrally disposed within the casing; it is preferably made of sheet metal, is open at the front and its bottom is secured to the bottom of the casing. In the cylindrical shell of said holder are provided perforations II of suitable size andnumber through which the water entering the the casing may reach a cake of soap (not shown) placed in the holder and dissolve the former gradually to produce the soapy water used, preferably, for the initial cleaning of dishes.

In the casing are the inlethole I02 and the outlet hole I03 for the cleaning water, said holes being connected to pipes, to be described hereafter. At the top of the casing thereis an opening- I04 closed by a flat cover I05 in which is drilled a vent-hole I06 which is closed by a flap-valve I01 made of resilient'material, such as rubber,

when water under pressure enters the casing.-

This flap-valve however opens this vent-hole to let air into the casing when the soapy water is drained therefrom.

7 H5 leads into the valve-chamber 5| of the distributing valve D, and from hubs I3 and I3 pipes I I6 and I I 'I connect said valve with the inlet hole I02 and outlet'hole I03 respectively of the soap-receptacle R.

From the twelve ducts 53 of the distribution valve D radiate an equal number of pipes going to the fouroscillating-sprayers' S and the four stationary S 'Each oscillating-sprayer S is supplied with. water by two pipes H8, H9 communicating at their lower ends with two adjacent ports .53 of the valve D and .at their upper ends respectively with the annular chambers I33 and 84 of said sprayers. The stationary sprayers S, however, are each connected to the distributing v'alve D by a single pipe I20. 1 v

Operation Assuming that the dishes to be cleaned have been placed into the trays 5 and 6, and the hose III applied to the faucet IIO, the handle I2 of the operating valve V is turned to the right (see Fig. 6) and the faucet opened. Hot-water will flow from the latter into the chamber I6 of the cylinder valve C, the valve-plate 25 of which is in the position shown in Fig. 12 with the valvehole 26 registering with the cylinder duct 20. The water pressure forces the piston upward sub-,. stantially into the position shown in Fig. 9. The upward motion of the-:lever imparts to the pawl actuated ratchet I2 and to the valve-disc 60 a counter clockwise rotation which brings the hole 62 in said disc into registry with the next following port 54. The connecting-link I2I moves upward with the arm 49 placing the lever 30 first in the substantially horizontal position shown in Fig. 9.

As soon as the longitudinal axis of the spring 36 rises above the center of the pivot-pin 24, the i tensioned spring causes the lever 30 to snap upward as far as the slot 32 will permit, into the position shown in Fig. 10. This causes the inner edge of the lever extension 34 to engage the lug 43 on the valve trigger 40 (Fig. 14) thusrotatlng same clockwise, so that the arm 4| of said trigger will uncover the drain-hole 2I of the valve C; at the same time the valve-plate 25 shuts off the inlet-duct 20 to the cylinder and simultaneously brings the valve hole 21 in line with the outlet port 23, see Figs. 10 and 13.

Th tension spring I08 now causes the piston to travel down into the cyl'nder, the water con tained therein escaping through the drain hole 2| into the casing B and thence through a drain hole I23 provided into the bottom thereof into the sink I24, Fig. 16. v

Water. may now flow fromthe chamber I5, via valve-hole 21, outlet port 23 and the pipelll into the operating valve V which, as stated, is in the pos'tion shown in Fig. '6. Thence via pipe 6 the water enters the soap-receptacle where it dissolves some of the soap. The soapy water then travels by way of the pipe II I into the other side of the valve V and thence through pipe II5 into the chamber 5| of the distributing valve D. Assuming, for instance that the hole 2 of the "valve-disc 60 be in registry with the valve port 54 (Fig. 1), this soapy water will then enter, by way of the pipe IIILthe annular chamber 04 of the oscllating sprayer S (positioned at the upper left hand corner inFig. 1), enter the annular space between the sprayer-pipes I3 and 14 and issue through the spray-holes 92 of the latter in strong jets directed against. the dishes.

At .the end of the next upward stroke of the piston 45, Fig.9, the hole 62 in the valve-disc will registed with the valve-part 54 During the downward stroke of the piston the soapywater will enter, via pipe I I8, the chamber 83. of the same sprayer S supplying said water to the inner tube I3 whence it emerges in sprays through the spray-holes 94. I

It will be noted that the oscillating movements of the lever 48, produced by the up and down v strokes of the piston 45, cause the sprayer tubes ing from said sprayer-tubes to swing about an arc of substantially 90.

The next upward stroke of the piston will bring the valve hole 62 in line with the port wand supply'soapy water to the pipe I20 and the staout first passing through the soap receptacle R,

and the soapy water remaining in the latter will run out through the pipe II! and the drain hole l4 in the valve, due to the fact that, by the action of the atmospheric pressure, the flap-valve I III will open the vent-hole I06 of the soap receptacle thus preventing the formation of a vacuum machine with a faucet IIII.

As shown therein lthis devicecomprises a tubular column I25 in the lower end of which is freely inserted a tubular foot I26 terminating with a heel I21 made of resilient material, such as rubher, to not mar the surface of the sink I24 upon which it bears. This foot is held in the desired position by a removal pin I28 adapted to simultaneously engage a through hole provided in the column I25 and either one of the several holes I29 provided along said foot, and whereby the efiective length of the device may be varied to suit local conditions.

Intermediate the ends of said column there is secured an interior plug I30, centrally apertured to slidably receive a long bolt I3I screwed into a plun er I32 freely engaging the column and form ng part of the, connector head I33. The

latter is recessed at the top .to receive a rubber socket I34 which is adapted to engage the spout of the faucet. A spring I35 is'inserted between the plug I and the plunger I32 to yieldingly hold the socket againstthe faucet in a --leak proof manner. This socket has a central through-aperture I36 which registers with a duct I31 formed in the head I33 and communicating with a nipple I38 laterally disposed on the head andto which the rubber hose is permanently secured. A downward pressure exerted on the head will release the device from the faucet.

As will be understood, there may be changes made in the construction and arrangement of the details of my invention without departing from the field and scope of the same, and I intend to include all such variations, as fall within the scope ofthe appended claims, in this application in which the preferred form only of my invention is disclosed. I

I claim:

' 1. In a dish washing machine, a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plug secured at one end of said tubes and having ports in communication therewith; a housing constructed to rotatably support said plug and having independent chambers communicating with said ports; means to close the other ends of said tubes; independent pipes to connect said chambers to a water supply; a plurality of outlets positioned on said tubes, and

means to oscillate said plug and tubes.

2. In a dish washing machine, a plurality of oscillatable sprayers each consisting of a' short outer tube and along inner tube disposed in concentric spaced relation therewith; a common plug secured to the inner ends of said tubes and having separateports in communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with said ports; means to close the outer ends of the tubes; two independent pipes to s connect said chambers to a water supply; a plurality of outlets positioned longitudinally on said tubes and disposed in alternate normal and oblique relation thereto, and means to oscillate said plug and tubes.

3. In a dish washing machine, a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plugsecured to the inner ends of said tubes and hav-.- ing separate ports in communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with said ports; means to close the outer ends of said tubes; two independent pipes to connect said chambers to a water supply; a plurality of outlets positioned longitudinally on said tubes and disposed in staggered alternately normal and oblique relation thereto whereby adjacent jets of water emerging from said outlets will not intersect each other.

42 In a dish washing machine, a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plug secured to thelinner ends of said tubes and hav-.

ing separate ports in communication therewith;

a housing constructed torotatably support said v plug and having separate chambers communicating with said ports; means to close the outer ends of said tubes; two independent pipes to con nect said'chambers to awater siupply; a plurality of outlets positioned longitudinally on said tubes; means to oscillate said plug and tubes, and means to successively supply water to said sprayers.

5. In combination with a casing, a hydraulic prime mover; means to supply water thereto; a rotatable distributor-valve; an operating lever therefor; means to actuate said lever by the prime-mover; pipe connections between the distributor-valve and said prime-mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in con centric spaced relation therewith; a common plug secured to the inner'ends of said tubes .and

operating lever for the distributor-valve freely mounted on said shaft; means to rock said lever by the prime-mover; means to rotate the distributor-valve by said lever; pipe connections between the distributor valve and the prime-mover; a

plurality of oscillatable sprayers each consisting of a short outer tube and a longinner tube dis- .common plug secured to the inner ends of said tubes and having separate ports in communica-- tion therewith; a housing constructed to rotatably support said plugs and having separate chambers a casing, a hydraulic posed in concentric spaced relation therewith; a

communicating with said ports; means to close the outer ends of said tubes; independent pipes connecting the distributor valve to said chambers;

a pluralityjof outlets positioned on said tubes; connecting-rods connecting the Operating lever to said sprayers; said distributor valve being constructed to successively -'supply water to said sprayers.

7. In combination with a casing, a hydraulic prime-mover; means to supply water thereto; a rotatable distributor-valve; a shaft therefor; an

operating lever for the distributor valve freely mounted on said shaft; means to rock said lever by the prime-mover; means to rotate the distributor-valve in one direction by said lever pipe connections between the distributor-valv and the prime-mover; a plurality of oscillatable sprayers eachconsisting of a short outer tube and a long on said tubes; connecting-rods connecting the operating leverto said sprayers; said distributorvalve being constructed to successively supply water to said sprayers.

8. In combination with a-casing, a hydraulic prime-mover; means to supply water thereto; a rotatable distributor-valve; a shaft therefor; an

operating lever for the distributor-valve freely mounted on said shaft; means to rock said lever by said prime-mover; a pawl and ratchet mechanism' interposed between said lever and distributor-valve to rotate same in one direction; pipe connections between the distributor-valve and the I prime-mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; acommon plug secured to the inner v ends of said tubes and having separate portsin communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with said ports;

means to close the outer ends of said tubes; in-

dependent pipes connecting the distributor-valve v to said chambers; a plurality of outlets positioned on said tubes; connecting-rods connecting the operating lever to said sprayers; said distributorvalve being constructed to successively' supply water to said sprayers.

, 9. In combination with-a casing, a hydraulic prime-mover; means to supply water thereto; a rotatable distributor-valve; a shaft therefor; an

operating lever for the distributor-valve freely mounted on said shaft; means to rock said lever in one direction by the prime-mover; independent means to rock the lever in the other direction; means to rotate the distributor-valve in one direction by said lever; pipe connections between the distributor-valve and the prime-mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plug secured to the inner ends of said tubes ;and having separate-ports in communication therewith; a housingconstructed to rotatably support said plug and having separate chambers communicating with said ports; means to close theouter ends of said tubes; independent pipes connecting the distributor-valve to said cham-. bers; a plurality of outlets positioned on said tubes; connecting-rods connecting the operating lever to said sprayers; said distributor-valve being constructed to successively supply water to said sprayers.

10. In combination with a casing, a hydraulic prime-mover; means to supply water thereto; a. rotatable distributor-valve; a shaft therefor; an operating lever for the distributor-valve freely mounted on'said shaft; means to rock said lever in one direction by the prime-mover; independent spring-means to rock the lever in the other direction; means to rotate the distributor-valve in one direction by said lever ;'pipe connections between the distributor-valve and the prime-mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a, common plug secured to the inner ends of said .tubes and having separate ports in communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with 'said ports; means to close the outer ends of said pipes; independent pipes connecting the distributor-valve to said chambers; a plurality of outlets positioned longitudinally on said tubes and disposed in alternate normal and oblique relation thereto; connectingrods connecting the operating-lever to saidsprayers; said distributor-valve being constructed to successively supply water to said sprayers.

A 11. In combination with a casing, a hydraulic prime-mover comprising a cylinder and a piston reciprocable therein; means to supply water under pressure to the prime-mover; a rotatable distributor-valve; a shaft therefor; an operating lever for the distributor-valve freely mounted on 4 said shaft; connecting means between said'piston and lever to rock same in one direction'during the outward stroke of the piston; means to rotate the distributor-valve insuccessive steps in one direction by said lever; independent means to rock said lever in the other direction; pipe-connections between the distributor-valve and the prime-mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plug secured to the inner ends of said tubes andhaving separate 'ports'in communication therewith; a housing constructed to rotatably support said plug and having separate chambers cdmmunicatingwith said ports;

. means to close the outer ends of said tubes; independent pipes connecting the distributor-valve to said chambers; a plurality of outlets positioned on 'said tubes; connecting-rods connecting the operating lever to said sprayers; said distributorvalve being constructed to successively water to said sprayers.

12. In combination with a casing, a hydraulic prime-mover comprising a cylinder and a piston reciprocable therein; means to supply water under pressure to the prime-mover; 'a rotatable distributor-valve pp y the outward stroke of the piston; means to rotate the distributor-valve in successive steps in one a .shaft therefor; an operating lever for the distributor freely mounted on I said shaft; connecting means between said piston and lever to rock same in one direction during direction by said lever; independent unitary means to rock'said lever in the other direction and effect the inward stroke of the piston; pipe connections between the distributor-valve and the prime-mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed, in concentric spaced relation therewith; a common plug secured to the inner ends of said tubes and having separate ports in communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with said ports; means to close the outer endsof said tubes; independent pipes connectingthe distributor-valve to said chambers; a. plurality of der'pressure to the prime-mover; a rotatable dis- :tributor-valve; a shaft therefor; an operating g lever for the distributor-valve freely mounted on said shaft; connecting means between said piston and lever to rock same in one direction during the outward stroke of the. piston; means to rotate the distributor-valve in successive steps in one direction byisaid lever; a spring having one end secured toastationary support and the other end securedto said lever -to simultaneously rock the operating lever in the other direction and effect the inward stroke of said piston; pipe connections between the distributor-valve and the prime-mover; a plurality of oscillatable Sprayers each consisting of a short outer tube and along inner tube disposed-in concentric spaced relation therewith; a common "plug secured to the inner ends of said tubes and having separate ports in communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with said ports; means to close the outer ends of said tubes; independent pipes connecting the distributor-valve to said chambers; a plurality of outlets positioned on said tubes; connectingrods connecting the operating lever to said sprayars said distributor-valve being constructed to successively supply water to said sprayers.

14. In a dish washing machine, a plurality of oscillatable sprayers each consistingwof a short outer tube and a' long inner tube disposed in concentric spaced relation therewith; a common plug secured to the inner ends of said tubes and having separate ports in communication therewith; a housing constructed to rotatably support said-plug and having separate chambers communicating with said ports; two independent pipes to connect said chambers to a water supply; a plurality of outlets positioned on said tubesymeans to oscillate'said plugs and tubes; means to successively supply water to said sprayers and means to sequently discharge water through the short and long tubes of each sprayer.

15. In a dish-washing machine; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plug secured to the inner ends of said'tubes and having separate ports in communication therewith; a housing constructed to rotatably support said plug and having separate chambers communicating with said ports; two independent pipes to connect said chambers to a water supply; a plurality of outlets positioned on' said tubes; means to oscillate said plugs and tubes; and unitary means to successively supply water to said sprayers andthe individual tubes thereof.

16. In combination with a casing, a hydraulic prime mover; means to supply water thereto; a rotatable distributor-valve; an operating lever therefor; means to actuate said lever by the prime mover; pipe connections between the distributorvalve and said prime mover; a plurality of oscillatable sprayers each consisting of a short outer tube and a long inner tube disposed in concentric spaced relation therewith; a common plug secured to the inner ends of said tubes and having separate ports in communication therewith; a housing constructed torotatably support said plug and having separate chambers communicating with said ports; independent pipes connecting the distributor-valve to the chambers in said housing; a plurality of outlets positioned on said tubes; connecting rods connecting the operating' lever to said sprayers; said distributor-i valve being constructed to successively supply water tov said sprayers and the individual sprayer-tubes thereof.

plug and having separate chambers communieating with said ports; independent pipes connecting the distributor-valve to the chambers in said housing; a plurality of outlets positioned on'said tubes; connecting rods connecting the operating lever to said sprayers; said distributorvalve being constructed to successively supply water to the individual tubes of one sprayer and subsequently to the other sprayers.

'GIDEON ANDERSON.

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