US393637A - qerry - Google Patents

Description

(No Model.) 2 Sheets-Sheet l.

J. H. GERRY.

ELECTRIC STRIKING ATTACHMENT FOR CLOCKS. No. 393,637. Patented Nov. 27, 1888.

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(No Model.) 2 Sheets-Sheet 2.

J. H. GERRY. ELECTRIC STRTKINC ATTACHMENT TCR CLOCKS.

180.893.687. Patented Nov. 27, 1888.

544mm. @Lw/Ww, e I

M a m 25.

UNITED STATES PATENT Ormea.

JAMES H. GERRY, OF BROOKLYN, NE\V YORK, ASSIGNOE TO THE SELF VINDING CLOCK COMPANY, OE SAME PLACE.

ELECTRIC STRI'KlNG ATTACHMENT FOR CLOCKS.

SPECIFICATION forming part of Letters Patent No.393,637, dated November 27, 1888.

Application filed June l. ISES. Serial No.275,7-lll. (No model.)

.To @ZZ whom may concern:

Be it known that I, JAMES H. GERRY, a citizen of theUnited States,residing in Brooklyn, in the county of Kings, in the State of New York, have invented certain new and useful Improvements in Electrical Striking Attachments for Clocks, ol' which the following is a specification.

The invention relates to the construction of ro striking devices designed to be operated through the instrumentality of electro-mag-` netism.

The invention consists, in general terms, in applying to a clock mechanism constructed with anysuitable form of driving-train a striking device which will be operated at the proper intervals to give the necessary strokes for indicating the hour, or fractions of an houril` desired, the power heilig supplied by means 2o of currents derived from a suitable source ol' electricity.

The invention will be described in conneo tion with the accompanying` drawings, in which Figure lis a plan of such parts ofthe striking-movement and applied mechanism as will serve to illustrate the invention. Eig. 2 is a front view of certain portions of the mechanism. Fig. 3 is a rear view ofthe mechanism, 3o and Fie'. :L is a side elevation. Only such portions ol' the clock mechanism are shown as are necessary to the complete understanding ol' the invention.

In the drawings, A and A'l represent the front and back plates, respectively, ot the clock mechanism.

a and a represent the minute and hour hands, respectively,which are mounted in the usual manner. The strike-snail B surrounds lo the central post and is revolved in the usual manner.` The ratchet b is constructed with a rackarm, Zz', applied to the snail in a manner well understood, aud to this ratchet there is applied the retaining-dog ZXl and the gathering-pin c, carried upon the revolving disk O. A spring is carried in a drum, D, for driving the striking mechanism, and thus actuating the hammer H. This spring is designed to be wound by means of an electro-magnet, E, and 5o itsarmaturcc. Thecircuit-connection through this electromagnet is controlled in the following manner: A conductor, L, is supposed to lead from a suitable source of currents to the clock, A conductor, l, leads from this through the coils ofthe magnet E to an insulated contact-spring, f. A circuit-closing spring, f2,

is applied thereto, and this spring is connected by a conductor, 2, with the returucon ductor L. The springf'l rests upon the periphery of the disk O, and is normally held 6o away from the arm f. The disk O is constructed with notches or indentations c', and

as these pass beneath the end of the springf" the latter is allowed to fall into contact with the arm j",thereby completing the circuiteconnections. As shown in the drawings, the circuit will be thus completed three times during each revolution of the disk C; but this number may he varied as foundA to be desirable.

The armature c, applied to the electro-mag net E, is suspended by arms c and in such manner that it will swing toward and gradually approach the poles of the magnet when the latter is vitalized. A suitable spring, e, tends to hold the armature away from the poles ofthe magnet. The vibrations of the armature thus obtained are communicated through a pawl, It', to a wheel, K. This wheel meshes with a wheel, 7s', which is carried upon 8o the drum D,and thus serves to wind the spring contained within the drum in a wellknown manner. It will therefore be seen that the spring within the drum D is maintained at the same tension, as the action of the striking mechanism itself sends regular impulses through the electro-magnet E, operating the armature c and rewinding the spring. The inner end ofthe spring being attached to the arbor d, which arbor also carries the striking- 9o wheel M, the latter will be turned whenever it is released by reason ol the tension exerted by the spring. The movements of the striking-wheel Mare determined in the usual wellknown manner,and itis arrested at the proper point by means of the arm m moving with the retaining-dog b2, and engaging a pin, m', upon the wheel N of the striking-train. The other portions of the striking mechanism which are shown in the drawings are well un- Ioo dei-stood, and need not here be more fully described.

In practice it has been found convenient to apply the striking device here described to a self-Winding clock of the character described in the patent issued to Chester H. Pond, November 25, 1884, No. 308,521. In the diagram, Fig. 2, the winding apparatus of such a clock is represented at Rand, as it Will be seen,the circuit through the electro-magnet Eis ashunt upon the winding device R. Other circuitconnections, however, may be adopted.

I claim as my invention- 1. An electricstriking device for clocks, consisting of a hammer-stroke*controlling mechanism, a spring for actuating the striking mechanism, and an electro magnet for winding the spring.

2. An electric striking device for elocks,eon sisting of a hammerstrokecontrolling meehanism, a spring for actuating the hammer and mechanism, and an electro magnet for Winding the spring, the armature ofsueh electromagnet having a'lateral movement with reference to the poles thereof.

3. An electric striking device for clocks, eonsisting of a hammer-stroke-controlling mechanism, a spring for actuating the hammer and mechanism, an electro-magnet for winding the spring, and a circuit-controller operated by the striking mechanism for determining the connections through the electro-magnet.

4. An electric striking device for clocks,eon sisting of a ham mer-stroke-eontrolling mechanism, a spring for actuating the hammer and mechanism, an electromagnet for Winding the spring-,and a circuit-controller for completing the connections through the electro-magnet, consisting ofa disk carrying the gatheringpin, having one or more indentations or projections, a circuit-closing arm resting against the disk, and a contact-arm applied thereto.

5. In a striking attachment for clocks, an electro-magnet for winding the same, a gathering-pawl, and a circuit controller for completing the connections through the electromagnet operated by the gatl'iering-pawl, substantially as described.

In testimony whereof I have hereunto subscribed my name this 31st day of May, A. D. ISSS.

JAMES H. GERRY.

IViunesses;

DANI.. W. EDGECOMB, CHARLES A. TERRY.

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