US1217688A - Electric switch. - Google Patents

Description

C. A. BATES.

ELECTRIC SWITC H. APPLICATION FILED IULYZI, I913.

1,217,688. Patented Feb. 27, 1917.

2 SHEETS-SHEET I.

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C. A. BATES.

ELECTRIC SWITCH..

APPLICATION FILED IULYZI. I913.

1,217,688. Patented Feb. 27, 1917.

2 SHEETS-SHEET 2.

V A \J L 44 0170470 UNITED STATES PATENT OFFICE,

CLARENCE A. BATES, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE BRYANT ELEC- TRIC COMPANY, OF BRIDGEIPORT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

' ELECTRIC SWITCH.

Specification of Letters Patent.

Patented Feb. 27, 1917.

Application filed July 21, 1913. Serial No. 780,283.

To all whom it may concern:

Be it known that I, CLARENCE A. Barns, a citizen oi? the United States of America, and residing in the city of Bridgeport, in the county of Fair-field and State of Connecticut, have invented a certain new and Improved Electric Switch, of which the following is a specification.

The present invention relates to an electric switch and particularly to a switch of the remote control type, the object of my invention being to improve the same in the features hereinafter pointed out and illustrated in the accompanying drawing, in which- Figure 1 is a plan view of a switch body with the switch mechanism removed;

Fig. 2 is a side elevation of the switch mechanism adapted to be positioned in the switch body shown in Fig. 1;

Fig. 3 is a section on the line 33, Fig. 1 with the metal switch supporting end lugs omitted;

Fig. 4 is an inverted plan of the switch body;

Fig. 5 is a vertical section showing the position of the solenoid casing;

Fig. 6 is a plan of an installation in which the present switch is adapted to be used;

Fig. 7 is a vertical section on line T7, Fig. 6; and

Fig. 8 is a diagram of the connections through the switch in an installation of the type shown in. Fig. 7.

In solenoid coil switches of the present type it is customary to control at least one branch of the circuit by means of a solenoid, the circuit through which it is completed at a remote point. In certain commonly used switch constructions, the solenoid circuit is interrupted only at the remote control point so that the circuit through the solenoid win ding continues even after the switch has been actuated thereby, provided the circuit re mains closed at the remote control point. This is attended by certain dangers, such as the burning out of the solenoid coil as well as unnecessarily consuming current, since the function of the solenoid is completed upon the actuation of the switch.

In my improved switch mechanism I have provided means for automatically interrupting the solenoid circuit upon the actuation of the switch, the circuit being again established upon the return of the switch to its original position.

In the form here illustrated the switch comprises an insulating cup 10 having wire terminals 11, 12, 13 and 14 for the main and branch circuits, the switch mechanism being of the four point type. The operating mechanism is of common snap switch type in its main features, and is mounted upon an insulating plate A carrying pairs of contact bars 15 and 16 adapted to electrically engage the uprights oi the wire terminals 11 to 14 inclusive. Pairs of switch contacts 17 and 18 cooperate with a pair of switch bars 19 electrically connected together by the cross strap 8 after the fashion shown in my prior Patent 1,127,379. A push button 20 is employed to operate the switch mechanism in one direction, while a solenoid core 21'operates it in the opposite direction, the stem 22 of the core engaging the rocker 23 of the switch mechanism in substantially the same manner as the stem of the button 20. The solenoid core 21 passes through a hole 2% in the base of the receptacle and enters the solenoid coil 95. One end 26 of the coil is led directly to the remote control switch X, while the other end 27 of the coil is led through the perforation 28 in the bottom of the switch base to a wire terminal 29 located in the switch chamber and electrically connected by the strap 30 to the upright 3' A strap 32 carried by the switch mechanism is electrically connected with the upright 31 in the adjusted position of the switch and leads the current to the supplemental switch terminal 33. A second supplemental terminal 34 is formed in one of the uprights 15 so that in the oil position or the switch (as regards the main switch terminals 17*] S) the switch bar 19 connects the terminals 33, and thus leads the current from the main terminal 12 through the supplemental terminals 34, to the upright 31 and thus through the solenoid coil. In this position therefore the switch is in readiness for operation through the coil 25, from the remote control switch X and upon completion of the circuit at said remote control switch, the flow of current through tie coil draws down the solenoid core 21 and thus shifts the switch blade 19 to the position shown in Fig. 2.

Obviously upon the pull of the core and the shifting of the switch blade 19 to the position shown in Fig. 2, the circuit through the solenoid coil is broken between the contacts 33, l and is not reestablished until the switch u been returned to original position by the depression of the push button 20.

An. installation in which a construction of this sort is of value is illustrated in Figs. (1 and T. This construction is particularly useful in hospitals where the solenoid coil circuit is controlled by a light push switch on the end of a flexible cord within reach of the patients bed. The patient needs but to touch this switch to energize the solenoid coil which thereupon draws down the solenoid core 21 and actuates the snap switch mechanism arranged in any convenient position in the wall nearby. This serves to operate a call to the attendant, who, upon reaching the bedside, returns the switch to its original position by pressing the button 20. A bulls-eye indicator lamp may be arranged beside the switch mechanism to indicate its operation. The attachment plug receptacle 36 allords a convenient means for connecting in the remote control switch 92 (see Fig. 8).

Since the lamp must be more or less frequently replaced, it is highly advantageous to have the portion 37 of the face plate detachable from the body of the face plate 38, so that access may be had to the lamp without disturbing the entire installa tion. For this purpose I provide lugs 39 at the edges of the aperture 40 in the main face plate in which the bulls-eye plate 37 is adjusted, and oifset the edges of the bullscye plate 37 at ell to cooperate with shoulders 39. Plates 42 at each end of the lamp receptacle receive the screws 4-3 by means of which the plate 37 is held in position.

Various modifications of the construction will readily suggest themselves, and I do not limit myself to the precise details of the construction shown.

I claim as my invention 1- 1. In an electric snap switch, an insulating body having a plurality of wire terminals, a. removable insulating member carrying main and auxiliary switch contacts, said contacts being electrically connected to their appropriate wire terminals in the assembled position of the parts, a bridging conductor carried by said removable member and connecting the auxiliary contacts in one position, and the main contacts in another position, manually operated means to move said bridging conductor into the position in which it connects the auxiliary terminals, and electromagnetic means, operative in the latter position of the switch, to shift the bridging conductor into connection with the main switch contacts.

2. In an electric snap switch, an insulating body having a plurality of wire terminals, a removable insulating member carrying main and auxiliary switch contacts, said contacts being electrically connected to their appropriate wire terminals in the assembled position of the parts, a bridging conductor carried by said removable member and connecting the auxiliary contacts in one position, and the main contacts in another position, manually operated means to move said bridging conductor into the position in which it connects the auxiliary terminals, and electro-inagnetic means, operative in the latter position of the switch, to shift the bridging conductor into connection with the main switch contacts, said electromagnetic means comprising a solenoid core operatively connected to the bridging conductor.

In an electric snap switch, an insulating body having a plurality of wire terminals, a removable insulating member carrying main and auxiliary switch contacts, said contacts being electrically connected to their appropriate wire terminals in the assembled position of the parts, a bridging conductor carried by said removable memher and connecting the auxiliary contacts in one position, and the main contacts in another position, a solenoid winding connected with one of said auxiliary contacts and arranged below the body of the switch, the latter being apertured in line with the axis of the solenoid winding, a push button for operating said bridging member in a direction to connect the auxiliary contacts, and a solenoid core passing through the bottom of said insulating body and into said winding for operating the. bridging member in a direction to connect the main contacts.

sulating electric snap switch having an in body with line terminals and a solenoid circuit terminal thereon, in combination with a removable member carrying a pair of main switch terminals adapted to engage and electrically connect with the line terminals on the switch body, a solenoid switch terminal adapted to engage and electrically connect with the solenoid circuit terminal on the switch body, and a second solenoid switch terminal electrically con nected to one of said switch terminals on said removable member, together with a switch bar arranged to connect either a pair of main switch terminals or the solenoid switch terminals, manual means for moving said switch bar into position to engage the solenoid switch terminals and a solenoid core subject to the current in the solenoid llO circuit connected to said bar for moving the latter into engagement with the main switch terminals, substantially as described.

5. In an electric snap switch, an insulating body having a pair of main line terminals, an independent terminal for an auxiliary circuit, a removable member carrying main switch contacts and an auxiliary switch contact, the main switch contacts in adjusted position engaging the main line terminals and the auxiliary switch contact engaging the auxiliary circuit terminal, and manually operated means for establishing the auxiliary circuit through the switch and electromagnetic means for establishing the main circuit through the switch, substan tially as described.

6. In an electric snap switch, an insulating body having a plurality of wire terminals, main and auxiliary switch contacts connected to their appropriate wire ter minals, a bridging conductor connecting the auxiliary contacts in one position and the main contacts in another position, manually operated means to move said bridging conductor into the position in which it connects the auxiliary terminals and electromagnetic means, operative in the latter position of the switch, to shift the bridging conductor into connection with the main switch contacts.

7. In an electric switch, an insulating body having four main switch contacts, and two auxiliary switch contacts, one of which is electrically connected to one of the main switch contacts, a solenoid coil connected at one end to the independent auxiliary switch contact, a pair of switch blades electrically and mechanically connected together, manually operated means to move said blades into position to connect the auxiliary switch contacts, and a member operative upon the energization of the solenoid circuit, to shift said blades into position to connect the several main switch contacts.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

CLARENCE A. BATE S.

WVitnesses H. WV. IVIEBERT, L. B. WVHEELER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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