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Publication numberUS349614 A
Publication typeGrant
Publication dateSep 21, 1886
Publication numberUS 349614 A, US 349614A, US-A-349614, US349614 A, US349614A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Srhn otc to george westing ho use
US 349614 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) 7


AUTOMATIC GUT-OUT FOR ELEGTRIG LIGHT CIRCUITS. No. 349,614. Patented Sept. 21, 1886.


BARRINGTON, M 88kt l l l J'Sli'l" A S- SHPNOR TO (lEOllill i \VES'llNGllOUSE, (lit, Oh ll'UPSBlTlRH, l.\.

SPECIFICATION forming part of Letters Patent No, 349,614; dated September 21, 1886.

Serial No. lrflliiii. (Xn model.)

. the connections of an electric circuit when it is traversed by currents of an abnormal or dangerous strength.

The invention is especially designed to be employed in connection with electric-light systems in which currents of a given potential are transformed into currents of a different potential through the instrumentality of an inductorium or converter.

The object of the invention is to provide an electromagnetic device operated by an excess of currelit-strength in the secondary or translating circuit of the indnctorium for automatically interrupting the connections of the primary circuit when, for any reason, the current traversing the translating-circuit exceeds a predetermined limit.

The invention consists in establishing the normal connections of the primary circuit of the inductorirnn, or, as it isprcfcrably termed, the converter, through an automatic circuit-interrupting device capable of being operated by an cleetro-magnet included in the secondary ortranslating circuit, and which acts to sever such connections. This electro-magnet, although not responsive to currents of the strength normally employed for operating the system, will nevertheless actuate its armature when traversed by currents of an abnormal strength suitlciently to act in turn upon the cir aiit interrrnsting device, and thereby release a circuit-closing arm from a detent, which immediately sever-s the connections of the primary.

The accompanying drawing is a side elevation of an apparatus embodying the essential features of the invention, together with a diagram of the circuits.

Referring to the figure, A represents an electric generator, of any suitable character, capable ot' transmittin currents of the proper character through a main line, L, to a primary coil, I), oi an iinluctorinzn, imluetion-coil, or converter, ii. The connection through the said primary coil. may be traced as l'ollows: from one arm, ll, of the main line through a conductor, l, to a pivoted arm, w, one end of which is preferably weighted, as shown at 0, while the other end, 0', is normally engaged by a detent, 0. An armature, 1", is carried upon the arm c of this detent, and an electro magnet, G, isapplied to this armature. Acondnctor, 2, leads t'rom the detent r through the primary coil 7) of the inductorinm, and a conductor, 3, leads from this coil to the remaining arm, L", of the main line.

The electro-magnet U is included in the circuit of the secondary coii 0'' oi" the indnctorium as follows: A. conductor, 5,leads from one ten minal of the secondary coil If through the coils of the electro-magnet G to the conductor 1, which constitutes one arm of the translatingcireuit. The other arm, I", of the trans lating-cireuit is connected with the remaining terminal of the secondary coil. by a conductor, 6. It sometimes chances that a currentot' abnormal strength traverses the secondary conductors of the induction-coil. It is then dc sirable that either its connections or the connections of the primary should be immedi ately interrupted. The electromagnet will at once respond to such a current, and. by withdrawing the detent, release the circuit-interrupting lover a, and by thus interrupting the prin'iary circuit the development of secondary and induced currents at once checked.

The application of the cutout has been de scribed in connection with the primary coil in such manner that it operates to sever the connections of the conductor leading thereto. I t is evident, however, that a shunt-circuit might be formed around the (oil by the circuit-coir troller, it' desirable. Thus a second contactpoint may be applied to the contact arm or lever in such position that the lever rests against it when fed by the device in the steondary circuit, as indicated in dotted lines.

In another application of even date here with, Serial Xo.1.86,161., I have described and claimed another device for similar purposes operated by the thermal effects prodnrral by abnormal currents.


before set forth, of a main line, an induction coil or converter, circuit-connections from said 15 main line through the primary of said induction-coil, a circuit-interrupting device, atranslilting-circuit including the secondary coil of said converter, translating devices in said translating-0ircuit, and an electro-magnet, also 20 included in the translating-circuit, for operating said circuit interrupting devicev when traversed by currents of abnormal strength.

3. The combination, substantially as hereinbefore set forth, with an electric generator and 2'5 a main line leading therefrom, of an inducti0n-coil, the primary circuitof which is included in the main-line circuit, a circuit-interrupting device included in circuit with the primary coil; a translating-circuit in which the secondary coil is included, translating devices 3c in the last-named circuit, and a device responding to abnormal currents in the secondary circuit for operating said circuit-interrupting de vice, and thereby interrupting the cireuitconnections of the primary. 3 5

4. The combination, substantially as hereinbefore set forth, with the primary circuit of an induction-coil and a circuit therefor, of a circuitdnterrupting device included in said circuit, a'ci'rcuit including the secondary of the 0 inductioncoil, and an electro-magnet included therein and applied to said circuit-interrupting device, substantially as described.

In testimony whereof I have hereunto subscribed my name this 4th day of December, A. 45 D. 1885.



Cooperative ClassificationH02H3/006