US1208571A - Electric-switch mechanism. - Google Patents

Description

C. KINGAN.

ELECTRIC SWITCH MECHANISM. APPLlCATlON FILED OCT. 10, 1914.

1,208,571. Patented Dec. 12,1916.v

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CHARLES KINGAN, OF EDINBURG, INDIANA, ASSIGNOR F ONE-HALF 'IO JOHN T. MIDDLETON, OF EDINBURG, INDIANA.

ELECTRIC-SWITCH MECHANISM.

Specification of Letters Patent.

Patented Dec. 12, 1916.

Application filed October 10, 1914. Serial No. 866,094.

To all whom it may concern Be it known that I, CHARLES KINGAN, a citizen of the United States, and a resident of Edinburg, county of Johnson, and State of Indiana, have invented a certain new and useful Electric-Switch Mechanism; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which like letters refer to like parts.

The object of this invention is the improvement of automatic current controlling switches or means, and particularly adapted for use in connection with pole changers,

'- motor generators and the like. Heretofore,

particularly in telephone constructions the pole changers were operated all of the time but with this invention the pole changer circuit and the A. C. circuit are both open when the device is not in use. Said object is accomplished essentially by the provision of a double switch which, when actuated, closes two independent circuits. Intelephone constructions, one of these circuits runs to the D. C. side of the pole changer or motor generator and the other from the A. C. side thereof. When the telephone is not in use both of said circuits are open, but when the ringing key at the central telephone station is inserted, the switch is actuated and the two circuits closed.

The nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawings, Figure 1 is an elevation of the switch mechanism with the wiring associated therewith shown in diagram. Fig. 2 is a section on the line 22 of Fig. 1 and on a larger scale.

Referring first to the switch construction shown, there is a base with a plate 11 thereon for supporting the magnets 12 and 13 which have cores l4 and 15 extending through a stationary plate 16. The magnets are beside each other and said plate 16 has on one side a central upwardly extending arm 17 on which a construction 18 is secured and its free end is secured midway to an armature bar 19. Said spring supports said armature bar over and out of contact with the cores 15 normally, but when said magnets are energized, said cores attract both ends of the bar 19 and simultaneously move it downward. In each end of said bar 19 there is a block 20 of insulating material on which a contact arm 21 is secured projecting beyond the end of the bar 19.

On one end of plate 16 there is rigidly secured an arm 22 and its outer end is upturned to receive a screw 23 on which contact terminals 24 and 25 are secured. These terminals 24 and 25 are insulated by insulation 26 from each other and the screw From said terminals 24 and 25 wires 27 and 28 run to the D. C. side of the pole changer or motor generator or other like device, and constitute an independent circuit which is closed by the free end of terminal 25 being pressed down into engagement with the end of terminal 24 by arm 21 on the armature 19 when it is attracted by the magnets. The terminal bars 24 and 25 are formed of spring metal and arranged so that normally their free ends remain slightly apart, as shown, but pressure on the upper one will bring them together. At the other end of the plate 16 there is secured an arm 32 similar to the arm 22 and there is a screw 33, terminals 34 and 35, insulation 86 and lines 37 and 38 similar to the construction above described excepting that the line 37 runs to the ringing key circuit 46 through the line 39 and to a switch board 45.

Normally the circuit is open when the key in the switch board is out. When the switch on the board is closed, it closes the circuit through the starting battery 48 which goes through the line 41 up through the coils 12 and 13 and down through the line and through the switch board and back through the line 39. This circuit excites the coils and operates the armature which closes the switches 34 and 35, and also 24 and 25. When these switches are closed, a circuit is closed through the battery 49 which is in series with the contact springs 24 and 25 through the lines 27 and 28. This sets up a direct current to the buzzer 50 which is on the pole changer 51. The battery 49 supplies current for the ringing key circuit which is connected to the pole changer by the lines 53 and 54. The pole changer is in turn connected to the lines 38 and 40 by means of which an alternating current is set up which passes through the springs 34 and 35 which are closed and through the lines 37 and 39 to the ringing key circuit 46 and then through the switch board which is closed back through the line 40 to the pole changer. This alternating current is strong enough for ringing the telephone bells or the like on the circuit throughout the outlying country. As soon as it is desired to stop ringing the bell, the circuit is opened at the switch board and current ceases to go throughout the whole system.

Heretofore in telephone systems it has been necessary to keep the buzzer and pole changer constantly going, which wears out the batteries in a short time, but in this system the batteries are not drawn on unless the switch on the switch board is closed for ringing a subscriber, for instead of having the buzzer constantly going, it is started by the starting battery, operating through the magnetic coils and the armature and switches 24- and 25 when it is desired to set up the alternating current for ringing anyone and as soon as the switch key is removed this current ceases. 7

Any similar switch mechanism may be used on this system and, therefore, the invention is not restricted to the particular construction of this mechanism.

The invention claimed is:

1. In an electric system, the combination with a D. C. circuit, an A. C. circuit, a

second D. C. circuit, and a pole changer, of a switch mechanism including a magnet coil, an armature adapted to be excited by said coil, a switch mechanism adapted to be closed by said armature for closing said second-mentioned D. C. circuit and said A. C. circuit, and a switch board for closing said first-mentioned D. C. circuit.

2. In an electric system, the combination with a D. C. circuit, an A. C. circuit, a second D. C. circuit, and a pole changer, of a switch mechanism adapted to close said second mentioned D. C. circuit and said A. C. circuit, a magnet coil on said switch mechanism, a starting battery, a switch board, and a circuit through said starting battery, switch board and a magnet coil for closing said switch mechanism and setting up the current through said D. C; circuit and A. C. circuit.

In witness whereof, I have hereunto aiiixed my signature in the presence of the witnesses herein named.

CHARLES KINGAN.

Witnesses:

J. H. WELLS, O. M. MGLAUGHLIN.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of ZPatents, Washington, 13. G.

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