US1185851A - Electric switch. - Google Patents

Description

0. TQSNYDER.`

ELECTRIC SWITCH.

APPLICATION man Nov. 11, 1914.

1 l 85,85' 1 Patented June 6, 1916.

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UNITED sTATEs PATENT oEEroE.

OWEN T. SNYDER, 0F COLUMBUS, OHIO', ASSIGNOR TO OWEN 'l'. SNYDER & COMPANY, A

FIRM COMPOSED OF OEN T. SNYDER .AND LOUIS F. FIESER, BOTH OF COLUMBUS,

OHIO.

ELECTRIC SWITCH.

Specicaton of Letters Patent.

Patented June 6, 1916.

Application led November 11, 1914. Serial No. 871,608.

a quick making and breaking of the eirv cuit controlled.

The main object of my invention resides in providing a structure of this type wherein resilient means are provided for bridging the gap in an open circuit, these resilient means being used in effecting the closure of the circuit and also for maintaining the circuit closed by a spring controlled contact member.

A further object of my invention resides in the provision of a push rod carrying a resilient extension which extension is so arranged that it operates upon the pivotally mounted contact closure control arm in such manner that the spring extension bears on this arm on one side` -of its pivot point when in open position and upon the opposite side of this pivot point when in closed position.

My invention also resides in the specific structure shown, other objects resulting therefrom being more apparent after a further detailed description of the accompanying sheet of drawings, in which similar characters of reference designate corresponding parts, and in which:

.Figure 1 is a face view of my switch shown in closed position with the cover plate removed, Fig. 2 is a view similar to Fig. 1 and showing the switch in open position, Fig. 3 is a section taken on line 3-3 of Fig. 1, and Fig. 4 is 'a-section taken on line 4-4 of Fig. 3.

In carrying out my invention, I have provided a casing member 1 of rectangular form preferably held closed by the cover structure shown at 2. This casing is provided with a plurality of openings to receive wire conducting conduits 3. Two of the conduits shown in the present drawing are provided with wires 4, these wires leading into the 'switch casing and the circuits they control 1 is a push rod 5 carrying a handle or bearmg knob 6. This push rod is suitably journaled in the boss 7 in the end of the casing and in the upstanding bearing member 8 so that only linear movement is possible. This push rod is held in retracted position or the position shown in Fig. 2 by the interposition of the coiled spring 9 between the bearing member 8 and a shoulder element 10 securely mounted upon this push rod. At its forward end there are attached two leaf springs 11 carrying bearing members 12 at their ends opposite from which they are attached, which bearing members are provided with rollers 13. Thesev rollers 13 are de- SignedF to resiliently bear against arms 14 pivoted to the casing 1 intermediate their ends as is shown at 15. At the forward ends of these arms there is attached a small strip of insulation 16 which pieces of insulation pivotally carry at their other ends contact or bridging members 17. These bridging members are of a length and shape to bridge the gap between each pair of binding posts 18 carried upon a suitable block of insulation 19 within the casing 1. It is to these binding posts that the incoming wires 4.- are attached as is shown "and movement of the contact members 17 to a position of engagement with these posts as is shown in Fig. 1, will effect the closure of the circuits.

My invention is particularly applicable to clrcuits designed to be closed by such movlng parts as elevator or other doors, etc., it being essential that the completion and breaking of the circuit be effected very rapidly. y

The manner of operation ofA my device is as follows, it being assumed two circuits are under the control of the switch member as is shown, although it will be apparent that the use of two circuits is not essential to the practising of my invention. The leaf springs l11 are of such tension that the pivoted arms 14 will be held in the position shown in Fig. 2 when the push rod 5 is in its retracted position since the rollers 13 bear on the ends of the arms 14 beyond their pivot points 15. The movement of the push rod 5 to the posi- Ytion shown in Fig. 1 causes the resilient eX- 'the contact or bridging strips'l? are pivotally mounted to the insulating 'strips 16, they will readily adjust themselves to a perfect contacting between each pair of binding posts 18 as is shown'. The degree of pressure of these contact members upon their respective binding posts is of course determined by the tension exercised by thel leaf springs 11. Release of the push rod from the position shown in Fig. 1 causes a breaking of the circuits thus made by the automatic action of the coil spring 9.

What I claim, is:

1. An electric switch comprising a casing, a lpush rod slidably mounted within said easing, resilient means for normally holding said rodl in its outermost position, an arm pivoted intermediate its ends, yielding means carried by said rod arranged to bear on said arm on one side of its pivot point when said rod is in its outermost position and on the opposite side of said pivot point when said rod is in its innermost position, a pair of binding posts, and a contact member pivotally carried by one end of said arm and arranged to engage said posts when said rodis in one of said positions.

2. An electric switch comprising a casing, a push rod slidably mounted within said casing, resilient means for normall holding said rod in its outermost posltion, a double pair of spaced binding posts, the pairs located along opposite sides of said casing and on opposite sides of said rod, a pair of arms pivoted intermediate their ends and on opposite sides of said rod, a pair of resilient extensions on said rod arranged to tion and on the opposite side of said pivot point when said rod is in its innermost position, and a contact member pivoted to each-L arm at a point betweenthe posts of each pair of posts and arranged to engage the posts of each pair when said rod is in its innermost position.

3. An electric switch comprising a push rod, guiding means for said rod, an engaging means on said rod, an arm pivoted intermediate its ends, said engaging means being arranged to bear on said arm on one side of its pivot point when said rod is in its outermost position and on the opposite side of said pivot point when said rod is in its innermost position a pair of binding posts, and a contact member pivoted to said arm at a point to lie between said posts and arranged to engage the posts when said rod is in one of said positions.

4. An electric switch comprising a push rod, guiding means for said rod, and engaging means on said rod, an arm pivoted intermediate its ends, said engaging means being arranged to bear on said arm on one side of its pivot point when said rod is in a 'corresponding position and on the opposite side of said pivotpoint when said rod is in a corresponding position, a pair of binding posts, and a pivotally supported contact member operatively mounted in connection with said arm to one side of its pivot point arranged to engage the posts when said rod is in one of said positions.

In testimony whereof I aiiix my signature in presence of two witnesses.

OWEN T. SNYDER.

Witnesses:

WALTER E. L. Boon, A. L. PHELPS.

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