USRE15152E - Switch mechanism - Google Patents

Description

H. F KRA-NTZ. SWITCH MECHANISM.

APPLICATION FILED APR. 30, l9l9.

Reissued J lily 12, 1921.

INVENTOR fluberff hranfz WITNESSES:

ATTORNEY H. F. KRANTZ.

SWITCH MECHANISM.

APPLICATION FILED APR. 30. 1919. Rclssued July 12, 1921. 15,152,

2 SHEETS-SHEET 2.

I F 'l/IIIIIIIIIII 'IIIIIII) Y'II/ INVENTOR BY LIATTORNEY' WITNESSES;

on line 7-7, Fig. 8.

UNITED STATES PATENT OFFICE.

HUBER! I. KRANTZ, OF BROOKLYN, NEW YORK, ABSIGNOR 'IO KRANTZ MANUFAC- TURING COMPANY, INC., 01' BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

SWITCH MECHANISM.

Specification oi lieissued Letters Patent. Risgued July 12, 1921.

Original in. 1,25 ,332, dated February 12, ms, Serial No. 836,423,1iled m a, 1914. Application in reissue filed April 30, 1919. Serial No. 298,857.

To all whomit may concem Be it known that I, Honnn'r F. KRANTZ, a citizen of the United States, residin at Brooklyn, count of Kings, city and tate of New York, ave invented certain new and useful Improvements in Switch Mechanism, of which the following is a clear, full, and exactdescription.

This invention relates to an improved electric switch mechanism for use with either a push button, lever throw 'or pull switch, particularly of the quick-make and quick-break type.

' It is the object of the invention to make a switch of this character in which the user upon breaking contact and up to-the time of actual break will necessarily increase the pressure on the contacting parts, and in which the contact, when once made, will be maintained by resilient pressure on the part of the operatin means. I prefer to use aswitch blade w ich is inherently resilient itself in accomplishing the purpose set forth.

A more detailed ob ect of the invention is to provide a quick-break mechanism made up of spring parts movable throu h a dead center position to reverse the e ect of said spring parts from a force tending to f on position to a force tending to ofi position, and to provide a contact member of sucha nature, and so connected as to serve in part to efiectually prevent the spring parts from standing in the dead center position.

The scope of my invention will be set forth in the claims.

In the accompanying drawin s:

Figure 1 is a side elevation o a pull form of my improved switch.

Fig. 2 1s a section on line 2-2 1. Fig. 3 is a section on line 44 of 1g. 4. Fig. 4 is a plan of Fig. 1. A F i 5 is a sectional view of a push button switc on line 5-5 Fig. 6.

Fig. dis a section on line (5-6 Fig. 5. Fig. 7 is a section of a lever throw switch,

Fig. 8 is a section on line 8-8 Fig. 7. Fig. 9 is a view similar to Fig. 5 of a modified type of push button switch.

In the drawings: Figs. 1 to 4, I have illustrated my invention as applied to a pull switch.

The base plate 1 has a terminal device consisting of four flatcontact plates 2, 3, 4 and which may be reciprocated from the position shown in full lines, Fig. 3 to that shown in dotted lines. Contact blades 8 and 9 carried by a reciprocatory carrier 10, and of the inherently resilient or brush type are adapted to contact with the terminal plates.

The carrier 10 surrounds and is guided upon the casing 6, and consists of side plates 11 and 12 secured by end rods 13.

The 0 crating rod 7 is recessed at 14 and provide with a shaft. 14 on which is mounted two rods 15 and 16, their ends passlng freely through 0 enings in blocks 17 and 18 ivotallymounte in the carrier 10.

prings 19 and 20 abut against collars 21 on the rods 15 and 16 and the other end of each spring rests against the blocks 17 or 18.

The devlce, when in the position of Fi 1 to 4, in contact, due to the springs 19 an 20,

carries the contact blade or blades to bear with pressure of the springs upon the terminal blocks. A

When it is desired to break contact the springs are even more greatly compressed until they reach a dead center, when the slightest additional movement causes them to lift the contact blades and break the circuit. I find in practice that such dead center is only theoretical and that it is impos sible to cause the switch blade to stop in such position.

This immediately destroys the dead center position and renders the springs 19 effective to send the carrier forthwith into the ofl? osition. The ressure of the springs 19 or urging the b ocks 17 and.18 downwardly is somewhat increased when the pivot pin 14 begins its downward movement, and as the downward movement progresses the compression of the springs dead center position-this force is sud-' denly released to cause the pivot centers of the blocks to bound above t e plane of the pivot pin. This immediately destroys the dead center position and renders the springs19 effective to send the carrier forthwith into the ofi' position. This i a v mp a tadvantage of the combination 1n that it insures a full, completeand positive I operation of the device with every downward movement of the operating rod.

Moreover, it enablesthe employment of a flat surface contact between the. switch blades and the contact terminals. In this latter connection itshould be noted that where a flat surface contact is employed and a dead center position of the springs is possible, then if at any time such a dead center position'be assumed, as by not press ing down the rod sufficiently far,"tl1en the pressure of the springs'to move the movable contact into engagement with the flat surfaces of the stationary contacts would be rendered 'nz'l and one or the other of the ends of the movable contact would probably move upwardly a slight distance away from its stationary contact. An arc would immediately ensue and the device probably be destroyed, perhaps causing much damage. I

The switch of Figs. 5 and 6 is of the push button type. The terminals, blades, carrier, operatingspringsand their rods and blocks are as shown in the figures before described with relation to the pull type of switch, but

i f the central reciprocating operating rod is replaced by a stationary post on which two connected collars 31 and 32 are slidable. The collar 31 is secured to the rods 34 of the operating mechanism and the collar 32 to a link 35 secured to a push button 36. 'A rocker arm 37 pivoted at 38 to the post 30 is attached to the push button 38 so that the cdllars may bypush button action be caused to move the rods 34 into and past dead center, as in the pull type heretofore described. A lever type of switch is shown in Figs. 7 and 8." I

To the base40 a standing terminals 41 and 42 are secure inherently resilient switch blades 43 carried on insulating blocks 44and of a general L shap e are adapted to make contact as shown in ig. 7.

The insulating blocks 44 are secured to a sliding carriage 45 sliding on guides 46.

APIVOtBd block 47 on the carriage 45 has a ro d 48 passing through the center. The

' rod carries a spring 49 and is secured to one end of a lever 50 the switch.

In the position of Fig. 7 the spring 49 continuallypresses thecontact blade against itsterminals. Upon swinging the switch lever over to position indicated by dotted lines as soon as .the rod passes a erpendicular position (dead center) the b ade will be shot tothe left and contact immediatel broken. y

The switch shown in Fig. 9 varies but pivoted at 51 to the face of ,tions.

slightly from that of Figs. 1 to 4, the difference being in that the push and pull rod 60 .can be operated by an auxiliary push button 61 instead of pulled out to make contact. a

For this purpose a connecting rocker arm' 62 is provided with slotted ends engaging pins 63 and 64 on the push. button rods 60 and, 61.

In carrying out this invention, details of construction may be varied from those shown, and yet the essence of the invention be retained; some parts might be employed without others, and new features thereof might be combined with elements old in the art in diverse ways, although the herein described type 1s regarded as embodying substantial mprovements over such modifica- As many changes couldbe made in the above construction, and many apparently widely different embodiments of the inven-- tion could be made without departing from the scope thereof, it is intended that all matter contained in the above descriptionor shown in the accompanying drawings shall be interpreted in an illustrative and not in a limitin sense. h

It is Furthermore desired to be understood that the language used in the following claims is intended to cover all the generic, and specific features of the invention herein--described, and all statements of the scope of the invention which as a matterof language mlght be said to fall therebetween.

1 claim as my invention:

1. In a switch mechanism, comprising a quick-break means for moving the switch blade away from a' contact member, said quick-break means including a spring exerting a tendency to urge the switch blade against the contact, and said spring being movable through a dead-center position for reversing its effectiveness upon the switch blade to thereby break the switch blade awa from the contact, the combination therewit of a flexible switch blade which is connected between the spring and the contact to receive pressure from the spring, andan operating 'member operable upon the spring to increase the pressure of the spring against the switch blade and thereby to flex the switch blade between the spring and the contact, said operating member being also adapted to move the spring through its deadcenter position to relieve the pressure of,

the sprm upon the switch blade and there-" bv to ena Ie the stored ener blade to cause the switch bfa de to move in a directionaway from the contact and'thus to act as an auxiliary to the breaking action of the spring.

2. In a switch mechanismm flexible switch blade movable toward and away from a "relatively stationary contact member,-a quickin the swit'fli ard, a member slidable upon said standard, a

break means for moving the switch blade away from the contact member, said quickbreak .means including a double spring tog- 1e exerting a tendency to urge the switch lade against the contact, said toggle being movable through a dead-center position for reversing its effectiveness u n the switch blade to thereby break the switch blade away from the contact, a floating carrier upon which the switch blade is carried, said caran opening therethrough withsure of the springs thereof upon the carrier and thereby to flex the switch blade against the contact by pressure from the carrier, said operating member being also adapted to move the toggle through its dead-center position to relievethe presure of the springs of the toggle upon the switch blade and thereby to enable the stored energ in the switch blade to cause the switch lade to move ina direction away from the contact and thus to act as an auxiliary to the breaking action of the tog le..

3. In a switch mec anism, comprising a floating carrier, a contact member supported by the carrier to move therewith, a standa pair of spring devices connected between said member and said carrier com risin adouble spring toggle of which sai mem er is the knee oint, the double spring toggle movable by said member through the d -center position for exerting ressure to urge the carrier suddenly into on or 01f positions, an operating lever pivotally mounted intermediate its ends,-link connections between said lever and said member to slide said member for operating said toggle in response to the swin 'ng movements of said lever, and means w ereby said leyielar may be swung in either direction at W1 4. In switch mechanism, the combination with a switch-blade carrier and a ,yieldable toggle means for yieldingly retaining the carrier in open and closed positions, of a flexible switch member mounted .on the carrier and adapted to be flexed by the carrier when the latter is in closed position.

5. In a switch mechanism, the combination with a'switch-blade carrier and a yieldable toggle means for yieldingly retainin the carrier in closed ition and for with rawing the carrier w1th a snap-action when the le is moved a predetermined distance, of

g a flexible switch member mounted upon the HUBERT F. KRANTZ.

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