US741490A - Electrical switch. - Google Patents

Description

No. 741,490. PATENTED 00-1 13,1903.

A.E.HANDY.I ELECTRICAL SWITCH.

' APPLICATION FILED APR; 15, 1903.

N0 MODEL.

wwmw'y Q No. 741,490. V

UNITED STATES Patented October 13, 1903.

PATENT OFFICE.

ARTHUR E. HANDY, PROVIDENCE, RHODE ISLAND, ASSIGNOR TO THE RHODE ISLAND ELEVATOR AND MACHINE COMPANY, OF PROVIDENCE,

,ELECTRtCAL SWITCH.

SPECIFICATION formingpart of Letters Patent No. 741,490, dated October 13, 1903.

Application filed April 15, I903. Serial No. 152,662. (No model.)

T0 at whom it may concern.- 7

Be it known that I, ARTIEIURQE; H NDY, a resident of Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Electrical Switches; and I do herebydeclare that the following is a full, clear, and exact description thereof, referencebeing had to p the accompanying drawings, and to the let- [0 ters of reference marked thereon, which form a part of this specification.

This invention relates to electrical switches of the class more particularly designed to be operated by opening and closing the doors in elevator-wells and are for the purpose of making and breaking the current which acts on a device to lock the car when the door is opened.

The object of the invention is to construct a simple and practical device which will work positively to make and break the electriccurrent by a quick action and one that will have a long stroke of the push'pin' or button to compensate for 10st motion and wear of the sliding elevator-doors. 7 It is fully described in the specification and'illustrated in the accompanying drawings.

Figure 1 is a side elevation of the device with the cover of the case removed, showing 0 the mechanism within. Fig. 2 is a perspective View of the swinging arm which makes and breaks the current by swinging its outer end in between the contact-pieces. Fig. 3 is a sectional View of the contact-pieces in po- 3 5 sition between the insulation-blocks. Fig. 4: is a perspective view of the contact-pieces in their relative position to each other,showing the binding-posts secured to their ends.

In the drawings, A is the case which is 0 made to inclosethe operating mechanism. The cover of this case is removed in Fig. 1, exposing to view all of the parts. The main lever B is pivoted at b and has an outward and slightly downwardly extending arm I),

5 in the end of which arm is fixed a pin 0.

B is the button or pin which is connected to the lever B and projects out through the casing A to be operated on and pressed in by closing the elevator-door. The spring a is coiled around the hub of lever B and has one end resting against the casin g, while the other end engages the lever B at a. The tension of this spring holds said lever normally in the forward position.

O is a swinging arm pivoted at c and slotted at its center portion (1 to receive the end of pin 0. Extending outward from the lower end of this arm is a pin d, of non-conducting material, and fixed to the end of this pin d is a tip e, of conducting material, which tip is forced by the inward movement of this arm in between the spring-lips g g of the contact-pieces g g, forming an electrical connection between them. Fixed to the outer ends of each contact-piece is a binding-post h h. The binding-screws '11 t are for securing the ends of the conducting-wires is it. These contact-pieces are held in blocks m, m, of fiber or any suitable non-conducting material, with layers of mica 12 between them.

The operation of the device is as follows: The switch "is fastened to the framework of an elevator-well by screws through the ears 1' r. The conducting-wires k'k lead from the binding-posts t i to the mechanism below, which operates to lock the elevator when the door is opened. In closing the well-door it comes in contact with and drives in the pin B, carrying with it the lever B and arm 0 to. the position shown in dotted lines in Fig. 1. By making a connection to this arm 0 close to its pivoted end the initial movement of this arm is necessarily veryquick. Then, as the lever B is thrown over, carrying the arm 0 with it, the pin 0 travels down the 85 slot d and both the motion and the speed of the arm are decreased to theminimum. The outer end of this armC is forced in between the two contact-pieces g g with a sharp quick motion and the circuit is completed, releasing the look below (not shown) and allowing the elevator to move. By my arrangement of lovers I get a large amount of extra motion on the head e of the arm O and also get a sharp quick throw of the head as it enters and leaves the contact-pieces. This quick throw is absolutely necessary to the successful working of this class of switch. This device is verysimple, practical, and efficient in its construction and operation and is well calculated to withstand and operate under the constant shock of a slamming elevatordoor against it and at the same time compensate for the looseness or loss of motion and wear in the sliding doors.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, a casing, spring contact-plates connected with the Wire-terminals, a spring-actuated lever pivoted at one end in said casing, a push-pin pivoted on the opposite end of said lever, a swinging arm pivoted near its end opposite to that of said lever the swinging end of said arm having a head of conducting material, a slot in said arm, a lever-actuated pin engaging the slot in said arm near its pivoted end so as to give the swinging end an accelerated motion when it enters and leaves the contactplates, substantially as described.

2. In a device of the character described, a casing, spring contact-plates connected with the wire-terminals,a spring-actuated lever pivoted at one end to the casing, apush-pin connected on the opposite end of said lever, a contact-arm pivoted near its end opposite to that of said lever, a slot in said arm, alever-actuated pin engaging the slot in said arm nearest its pivoted end when said arm is out of engagement with said contact-plates, said pin gradually receding in said slot from said pivotal point as the arm enters the contact-plates for the purpose of obtaining a quicker action in entering and leaving said plates when said push-pin is operated, substantially as described.

3. In a device of the character described, contact-plates, having spring-lips and connected to the wire-terminals, a slotted arm held to swing from one end and carry a head of conducting material on the end of a nonconducting pin extending out from said arm, a push-pin,a lever pivoted at one end and engaging said push-pin at its opposite end, an arm on said lever, a pin in said arm engaging the slot in said swinging arm, a spring bearing against said lever to draw out the swinging arm and break the connection between said contact-plates when the pressure on the pushpin is relieved, substantially as described.

4.. In a device of the character described, wire-terminals,contact-plateseachhavingone end turned back nearly upon itself, forming spring-lips and connected to said wire-terminals, aslotted arm pivoted at one end, an insulated head of conducting material held on the end of said arm, a pushpin, a lever pivoted at one end and engaging said push-pin at its opposite end, an arm on said lever, a pin fixed in said lever-arm engaging the slot in said swinging arm to give said swinging arm an accelerated motion when said lever is moved, a spring acting on said lever to keep it in its outward position, substantially as described.

In testimony whereof I have hereunto set my hand this 11th day of April, A. D. 1903.

ARTHUR E. HANDY. In presence of-- HOWARD E. BARLoW, E. I. OGDEN.

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