US467748A

US467748A - Frank a

Info

Publication number: US467748A
Authority: US
Publication date: 1892-01-26
Anticipated expiration: 1909-01-26

Description

(No Model.) 7

F. A. ELLIS.

I ELECTRIC GLDGK.

No. 467,748. v Patented Jan. 26,1892.

Wilrce'sses I v I 1 [lo e221??? 540 JM/mjw I jwa mww% W UNITED STATES PATE T OFFICE.

FRANK A. ELLIS, OF TORONTO, CANADA.

ELECTRIC CLOCK.

SPECIFICATION forming part of Letters Patent No. 467,748, dated January 26, 1892.

Application filed June 13, 1891. Serial No. 396,099. (No model.) I

To all whom it may concern:

Be it known that I, FRANK ALEXANDER ELLIS, of the city of Toronto, in the coun ty of York, in the Province of Ontario, Canada, have invented a certain new and useful Improvement in Electrical Clocks, of which the following is a specification.

The object of the invention is to provide simple mechanism by which a number of clocks may be accurately operated by and from a standard clock; and it consists in the peculiar construction, arrangement, and combinations of parts hereinafter more particularly described, and then definitely claimed.

The drawing represents a perspective view of the parts involved in my invention.

A represents an ordinary battery; B, the wire connecting the battery A to the metal frame 0, in which the spindle of the escapewheel D is journaled.

E is a wire connecting the battery Alto the magnet F, and G is a wire connecting the magnet F to the metal post H, which is suitably insulated from the frame of the clock and has a light metal springl extending from it in the path of a metal pin J, extending from the escape-wheel D. In this arrangement the magnet F will only be magnetized when the pin J is in contact with the spring I.

K is an armature from which a lever L extends. On the end of this lever I flexibly suspend a bar M, the weight of which is sufficient to keep the armature K clear of the magnet F, except when the circuit is made by contact between the spring I and the pin J the strength of the current thus created being sufficient to draw the armature K into contact with the magnet F, and thereby raise the bar M, which, as before stated, is sufficiently heavy to draw the armature K away from its magnet the instant the current is broken by the pin J clearing itself of the spring I.

N is a pawl pivoted on the bar M and preferably actuated by a light spring 0 in such a manner as to hold the nose of the pawl N in constant contact with the ratchet-teeth P, formed on the wheel Q, which is fixed to the spindle R of the minute-hand. This spindle is suitably geared, as indicated, to the spindle S of the hour-hand.

Assuming that the escape-wheel D represents the escape-wheel of a standard clock from which it is designed to operate one or more clocks, consisting merely of minute and hour hands arranged in connection with a clock-dial, it follows, therefore, that each revolution of the escape-wheelD causes the pin J to fall in contact with the spring I, which con tact is broken almost instantaneously by the pin J passing the spring I, which spring is extremely light, so that it will not interfere with the free revolving of the escape-wheel. The instant that the contact described is made the armature K is drawn toward its magnet F, thus raising the bar M so as to bring the nose of the pawl N opposite to a fresh tooth formed on the wheel Q. The instant that contact ceases between the pin J and the spring I the weight of the barM causes it to fall, the said weight being sufficient to make the ratch vet-wheel Q revolve the distance of a single tooth, and as this ratchet-wheel Q is fixed to the minute-spindle R, which is geared to the hour-spindle S, the said spindles are caused to revolve a sufficient distance to indicate a minute and corresponding fraction of an hour. A pin T, extending from the bar M, comes in contact with the ratchet-wheel Q when the bar M has fallen suiilc'iently far to give the desired movement tothe wheel Q. This pin prevents the bar M falling farther than the required distance to accomplish the desired end, and it also assists in preventing the wheel Q from revolving. A light spring-pawl U, connected at one end to the frame V and designed to engage its other end with the ratchet-teeth P on the wheel Q, efieetually prevents the wheel Q from being revolved in the reverse direction by the upward movement of the pawl N when the bar M is raised, as before described.

From thisdescription it will be seen that by my invention I provide simple mechanism by which a number of. clocks may be accurately operated by and from a, standard clock.

What I claim as my invention is- 1. A vertical bar M, suspended from the I arm or lever L, connected to the armature K, a pawl N, pivoted on the bar M and designed to engage with the teeth P, a spring 0, de signed to act against the pawl N, a pin T, ex-

tending from the bar M and designed to come in contact with the teeth P when the bar has fallen, in combination with an electric circuit extending from the magnet F to the escape- 5 wheel or other moving part of a clock by which the said circuitm ay be madeand broken at stated intervals, substantially as and for the purpose specified.

2. A vertical bar M, suspended from the arm or lever L, connected to the armature K, a pawl N, pivoted on the bar M and designed to engage with the teeth P, a spring 0, designed to act against the pawl N, a pin T, extending from the bar M and designed to come in contact with the teeth P when the bar has fallen, the spring-pawl U, engaging with the teeth P, in combination with an electric circuit extending from the magnet F to the escape-wheel or other moving part of a clock by which the said circuit may be made and broken at stated intervals, substantially as and for the purpose specified.

3. A Vertical bar M, suspended from the arm or lever L, connected to the armature K, a pawl N, pivoted on the bar M and designed to engage with the teeth P, a spring 0, dc signed to act against the pawl N, a pin T, extending from the bar M and designed to come in contact with the teeth P when the bar has fallen, the spring-pawl U, engaging with the teeth P, in combination with the wire E, connecting the magnet F to the battery A, the Wire G, connecting the magnet F to the insulated post 11, the wire 13, connecting the battery A to the frame C, in which the escapewheel D is journaled, a pin F, extending from the escape-wheel D and designed to come in contact with the-spring I, whichis connected to the post H, substantially as and for the purpose specified.

Toronto, May 21, 1891.

FRANK A. ELLIS.

In presence of- I. EDW. MAYBEE, W. G. MCMILLAN.