US532537A

US532537A - Harry p

Info

Publication number: US532537A
Authority: US
Publication date: 1895-01-15
Anticipated expiration: 1912-01-15

Description

(No Model.)

II. P. DAVIS.

AUTOMATIC CIRCUIT BREAKER.

Patented Jan. 15, 1895.

fi a B y f A TTORNE m UNITED STATES PATENT OFFICE.

HARRY P. DAVIS, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO THE iVEST- INGHOUSE ELECTRIC AND MANUFACTURING COMPANY, OF SAME PLACE.

AUTOMATIC CIRCUIT-BREAKER.

S1913 CIFIIJATION forming part of Letters Patent No. 532,537, dated January 15, 1895.

Application filed February 28, 1394- Serial No, 501,756. (No model.)

To all whom it may concern: 15, which is preferably provided with an in- Be it known that I, HARRY P. DAVIs,a citisulating handle 16. The upper end of the zen of the United States, residing in Pittsconducting stem is adapted to make contact burg, in the county of Allegheny and State of with the movable weight or knob 17, which 5 Pennsylvania, have invented a new and useis in continual electric connection with the fullmprovementinAutomaticCircuit-Breakcasing 1. As long, therefore, as the armature ers, (Case No. 578,) of which the following is a is held up to its place by the casing when specification. magnetized by the solenoid 3, there will be an My invention relates to devices for autoelectric connection between the incoming to inatically interrupting electric circuits on the binding post 13 and the casing 1, thence occurrence of excessive currents therein. through the solenoid and wire 6 to outgoing The object of my invention is to provide a blnding post 5. device of this class which shall be easily ad- To set this device, the armature is raised justable, and at the same time perfectly reinto the position shown in Fig. 1, until the i5 liable in its action, and which shall not percatch 18 is made to sustain the armature. mit maintenance of an are at the point of The method of this support is plainly shown rupture. in the drawings. hen current is nowturned Another object of my invention is the at on, the armature is brought into its highest tainment of portability, compactness and fireposition, the movable nature of the contact 2o proof qualities in devices of this character. piece 17 permitting considerable play. In My invention is illustrated in the accomthis position the weight of the catch will bring panying drawings, whereinit into the vertical position, and the armature Figure 1 is a vertical section of my device will be ready to fall upon failure of current for in a plane parallel to the suspending board, any causein the solenoid. The upper surface 25 and Fig. 2 is a vertical section on a plane at of the armature is preferably overlaid with 7 right angles to the plane of section of Fig. 1. non-magnetic material to prevent sticking to My circuit breaker consists of a magnetic the iron when the solenoid is demagnetized. casing 1, within which is a restricted cham- The use of this device is two-fold. If by her 2, surrounded along a greater or less porany accident a temporary break occurs in the 30 tion of its length by a solenoid, 3. One tercurrent passing through the solenoid, the minal is connected, as at 4:, with the magnetic armature will instantly drop to the position casing 1, and the other terminal is connected shown in Fig. 2, and the local circuit in which with one of the binding posts, as 5, by theinthe solenoid is located, being thus broken, sulated wire 6. Also connected electrically any translating devices with which it may be 35 to the binding post 5 by the Wire 7, is the pendin circuit are protected fromsudden resumpant 8, loosely pivoted upon the insulating tion of current, which mightingure them. On standard 9, or otherwise normally insulated the other hand, if, by short-circuits or otherfrom the casing 1. wise, the current in the solenoid becomes ex- The magnetic casing 1 is provided with a cessive, the magnetization of the casing 1 be- 40 break 10, which causes leakage lines tending comes so high that sufficient leakage occurs more or less to attract the magnetic pendant at 10 to attract the pendant 8 into the posi- 8 into the position shown in Fig. 1. The uption shown in Fig. 1. A short circuit around per end of the pendant 8 is adapted to imthe solenoid is thus provided, from the casing pinge upon the stop 11, which is made adjustthrough the pendant and wire 7 to the bind- 5 5 able as by screwing, as shown, and is provided ing post 5. The casing is demagnetrzed, and with any well known means for insulating the armature drops, breaking the circuit at the pendant at this point from the casing. the contact 17. If any are occurs on this The rubber cap 12 is shown as an example of breakage, it creates sudden expansion of air these means. The current normally enters in the chamber 2,which, finding vent through mo 50 by the binding post 13, and proceeds to the the opening 19, blows out the arc.

conducting stem 14, carried by the armature It Wlll be seen that my device, by mclosing the break, insures absence of fire risks, and that in every respect, a maximum of portability, compactness and convenience is obtained.

I do not limit myself to the specific details shown and described herein, as many obvious modifications might be made, without departing from the spirit of my invention.

\Vhat I claim is-- 1. In an automatic circuit breaker, a movable contact piece and an armature for controlling the same; in combination with a magnetic body for actuating said armature and in the circuit to be broken, and a secondary shunting armature adapted to be brought into said circuit by contact with said body, substantially as described.

2. In an automatic circuit breaker, a movable contact piece and an armature for controlling the same; in combination with a solenoid and a magnetic casing surrounding the same in the circuit to be broken, and a secondary armature for shunting said solenoid, adapted to be brought into said circuit by contact with. said casing, substantially as described.

3. In an automatic circuit-breaker, a solenoid and magnetic casing surrounding an inner chamber, said casing being pierced with a vent for said chamber; in combination with a contact stem passing through said chamber, and an armature carrying said stem,

adapted to be normally held up by said solenoid, substantially as described.

4. In an automatic circuit breaker, a magnetic casing in the circuit to be broken, and a main armature governed thereby, said casing having a leakage break, in combination with a shunting armature placed near said break and adapted to be attracted into contact with said casing when the leakage across said break becomes excessive, substantially as described.

5. In an automatic circuit breaker, a magnetic casing in the circuit to be broken, and a pendent shunting armature hanging near to but insulated from said casing, in combination with an adjustable stop adapted to make contact with said pendent armature, substantially as described.

6. In an automatic circuit breaker, the magnetic sustainer, and the armature upheld thereby; in combination with a stop adapted to be swung under said armature, and to swing away therefrom when the armature is drawn fully into place by the magnet, substantially as described.

In testimony whereof I have hereunto subscribed my name this 26th day of February, A. D. 1894.

HARRY I DAVIS.

Witnesses:

JAMEs W. SMITH, HUBERT C. TENER.