US933489A - Electric switch. - Google Patents

Description

UNITED STATES PATENT OFFICE.

HENRY n. nnnvn, 6! NEW YORK, 11. Y.

ELECTRIC SWITCH.

Specification of Lette'rs'l'atent.

Patented Sept. 7, 1909.

Application filed May 1'2, 1908, Serial No. 432,385. Renewed-Tune 1 7, 1509'. Serial No. 502,800.

To all whom itmay concern:

Be it known that 1', HENRY E. Rnnvn, a citizen of the United States, residing at New York, in the county of Kings and State of New York, have invented certain. new and useful Improvements in Electric Switches, of which the following is a specification.

My invention relates to improvements in electric switches.

It is particularly designed for use in incandescent lamp sockets, but it will be obvious that its use is not so limited.

The objectof the invention is to rovide a simple and reliable mechanism w ich is durable, will enable the operator to break a circuit quickly without arcin and which can be manufactured economical y.

The invention, consists of improvements, the principles of which are illustrated in the accompanying single sheet of drawings. 7

Figure 1, is a vertical section of mechanism embodying the improvements of my invention, the arts of the switch being in the open or ofi' position. Fig. 2, is a similar view, the parts of the switcli'bein'q in the closed or on position. Fig. 3, is a plan view of the parts of the switch. Fig. 4,.is a perspective view of the switch frame. Fig. 5, is a perspective view of the movable contact member. Fig. 6, is a plan view of tile operating cam. .Fig. 7, is a sectional view slmilar to Fig. 2 of a construction emb ing modifications of details of the invention. Fig. 8, is a perspective View of the catch shown in F ig. 7. Fig. 9 is a fragmentary plan view of the contact arm shown in Fig 7.

The invention is illustrated. as embodied in a lamp socket in which the screw threaded sleeve 1 for receiving the lamp (not shown) is attached in suitable manner to a porcelain block 2.\vhich forms one-half of the insulating base. The other half of the base is indicated at 3. Two halves of the base are secured together in any suitable manner as s customary in the.art and are recessed to reoeive the switch mechanism. I

The switch frame maybe conveniently formed of sheet metal stamped or formed as illustrated in Fig. 4. The spring member 4 whose tip is'adapted to contact with the bottom of the sleeve 1, is anchored'or sup ported between .1. depending shoulder 5-01 the switch frame andan abutment formed by a in or bar 6 which. passes through per foratlons 7, 7 in the sides 8,8 of the switch frame. This bar 6 is preferably an integl al varm as shown in in part of the base 9 of a binding post having a clamp nut 10 forsecuring ne of the conductors to the switch. Elect ic connection will thus be direct from the binding post to the switch arm 4.

The two'armed cam 11 which serves to move the spring member 4 is fixed on shaft 12 and may thus be turned by a button 13 in either direction. .This cam shaft 12 prefcrabl rests on the bottom of the switch frame an s held, in place by the porcelain block 2 )nc side 0 the, frame is notched as at i i to receive the shaft. At the bottom of the tongue 41 is shoulder 42 coacting with the cam 11. l he width and location of the cam are such that it never comes under the contact tip of the spring member 4 but is always eneath the tongue 41. The spring catch 15 is anchored or held between the walls, 16 and 17 of the switch frame, the shoulder 18 preventing displacement. The ton e 41 is integral with the switch arm at! coacts with'thc catch 15. \Vhcn the cam is rotated from the pdsition shown in Fig. 1, it engages the shoulder 42 and thus raises the contact arm-so that the tip of the catch snaps under the tongue 41 to support the contact arm in the closed position, (see Fig. 2);. The catch has a shoulder 19 adapt ed to be engaged by the cam so that when the cam is rotated from the position shown in 'Fig. 2 the catch is raised and disengaged from the tongue 41.' The contact arm thus released, snaps quickly down opening the circuit abruptly.

In the fofin' shown iirFig. 7, the swih h spin 4; is anchored in a diiiercnt manner. The rear end passes beneath the pin 27 and bears against the flange 28, which is formed by turning one side 2965 the switch frame. The sides of the switch frame are slotted us at 30 to receive the anchor pin 2?. The catchlii is anchored in a manner similar to that before described excc t that the wall 31 is not closed down to, the same extent as the wall 17 in Fig. 4. In this form the tip of the switch arm lies between the flanges 20, 20 of the catch. \Vhcn the cam is turned from the dotted' position to the full line pnsition of F ig'.'7 to close the circuit, one arm engages the switch'arm' i, and raises it un- 24, 24 beneath the ed cs 32, 32

inns. For this purpose the parts are so proportioned that the cam lifts the contact arm 4 a little higher Ltil the catch snaps down with the shoulders of the switch than the position shown so that the catch is free to snap under. When the cam is released the contact arm presses down on the shoulders 24, 24. When it is desired to retract the switch arm 4, the cam 11 is turned until one arm enga es the boss 25 of the catch and forces It ack so as to disengage the catch shoulders 24, 24 from beneath the edges 32, 32 of the switch arm, which immediately sna 5 out of contact with the sleeve and takes t e position of Fig. 7. While it is possible to use straight members in the switch like the arm 4 in Fig. 7,-I prefer to form shoulders like 42 and 19 in Figs. 1 and 2 as they permit a much greater range of movement of the members. It is particularly desirable to form a shoulder like 42 on the contact arm but I prefer to also have a. shoulder like 19 on the catch. In both forms the points of engagements of the cam withthe catch and switch arm, and the point of engagement of the catch with the switch arm being located close together, the movements are positive and quick. The advantages of the construction herein described and articularly the preferred form illustrated in Figs. 1 to 6 inclusive will be apparent to those acquainted with this art, particularly as regards simplicity of construction, durability and positiveness of action.

r hat I claim is:

1. In an electric switch, a frame, a spring contact member carried thereby, a spring catch and a rotatable cam adapted to engage the contact member to move it into closed position and adapted to move the catch to release the contact member.

2. In an electric switch, a framehaving side flanges with openings, a binding post base extending through said openings, a spring contact member having one end electrical y engaging said base, a rotatable cam for lllOVill" said contact member in one direction and a catch for holding said member in its closed position.

3. In an electric switch, a frame havin a shoulder, a spring contact arm engaging said shoulder, a transverse bar serving as an abutment for said contactarm, a rotatable cam for operating said arm and a catch for said arm also operated b said earn.

4. In an electric switc a frame, contact arm carried thereby and having a shoulder, a spring catch for supporting said arm and a cam for engaging said shoulder to more said switch arm in one direction and for moving said catch to release said arm.

5. ln an electric switch, a spring contact arm,-:in operating cam, a spring catch having a part for supporting said arm in the closed position andhaving another part ada ted to be engaged by said cam to release said arm.

(5. In anelectric switch,

a spring a spring contact arm having a shoulder, a spring catch for said arm said catch having a shoulder and a cam for engaging the shoulder of said arm to close the circuit and also engaging the shoulder of said catch for releasing the same to open the circuit.

7. In an electric switch, a spring contact arm having a shoulder and a ton no, a catch for supporting the tongue of sai arm and a cam for engaging said shoulder to move said arm and permit said catch to engage beneath said tongue.

8. In an electric switch, a spring contact arm having a tongue, a spring catch having a portion to engage said tongue to support the arm and a cam for operating said members.

't). In an electric switch, two' insulating blocks having recesses, a switch-frame located flan es, a spring contact arm and a sprin catci carried b said frame between said flan es, a cam for o crating said arm and catc a shaft for sai cam supported by said frame and held in place between said blocks.

10. An electric switch comprisin a frame having a downwardly inclined wal with an upwardly inclined extension, a spring catch having a loop held between said walls, a contact arm coo'peratin with said catch and a cam 'for o )erating said arm and catch.

11. An e ectric switch comprisin a frame having a downwardly inclined wal with an upwardly inclined extension, a spring catch having a loo between said walls, a shoulder on one wall I01 holding said loop, a contact arm cooperating with said catch and a cam for operating said arm and catch.

, 1.2. In an electric switch, a frame having an abutment and a shoulder, a cam, a sprin contact arm pressing toward said cam, and having a loop held between said shoulder and said abutment, and a catch for said arm operable by said cam.

13. In an electric switch, a spring contact member having a projecting tongue, a catch adapted to coact with said tongue and support said contact member and means coactmg with said contact member at the base of said tongue to move the contact member and close the circuit.

14. In an electric switch, a spring contact member having a tongue at one side, a sprin catch having its tip adapted to coact wit. said tongue and means coacting with said contact member and with said catch for mov ing said contact member to close th'e cilruit and for moving said catch to release said contact member and open he circuit.

HENRY E. REEVE.

Witnesses:

A. Y. SEAMAN, RoB'r. S. ALLYN.

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