US611566A - Walter d - Google Patents

Description

N0. 6||,566. Patented Sept. 27, |898. W. D. DAVIES.

REPEATING ALARM `CLOCK.

(Application filed June 30, 189B.) (No Model.)

HM@ i UNITED STATES PATENT EErCE.

VALTER D. DAVIES, OF NEV YORK, N. Y., ASSIGNOR TO THE ANSONIA CLOCK COMPANY, OF SAME PLACE.

REPEATING ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 611,566, dated September 27, 1898.

Application filed June 30, 1898.

To @ZZ whom it may concern:

, specification. i

This invention relates to what are known as repeating alarin-clocks-that is to say, alarm-clocks in which the alarm mechanism when tripped or sprung operates during a series of recurring interrupted periods.

The object of this invention is to provide in such an alarm mechanism an interrupting device which frees itself easily at the proper times for repetition and which while in operation produces only a very slight obstruction to the movement of the time-train of the clock;

land withthis end in view the improvement consists in the interrupting mechanism here-v inafter described and claimed.

' Figure l is a vertical sectional View of such of the parts of an alarm-clock movement as are necessary to illustrate the invention, the section being taken just inside of the back plate of the movement-frame. Figs. 2, 3,' and 4 are views, taken in the opposite direction to Fig. 1, of the principal parts of the alarm-interrupting device, showing them in three different positions. Fig. 5 is a perspective view of one part of said device.

Similar letters of reference designate corresponding parts in allthe figures.

A designates the front plate of the frame of the clock-movement; C, the mainspring of the time-train; D, the winding-arbor of said spring, carrying the main wheel E, which gears with the center pinion c. on the minutehand arbor b; c, the arbor known as the third-wheel arbor, carrying the secondstime pinion d and the third wheel e, said pinion d gearing with and receiving motion from the center wheel F is the spring, and G the winding-arbor, of the alarm-train, the said arbor carrying the driving-wheel Cr, which operates through pinions f g and a wheel h to drive the arbor of the escape-wheel i, which actnates the alarm-hammer I-I through the verge j, to the arbor 7c of which the said hammer is attached.

Serial No. 684,788. (No model.)

The said arbor la is also provided with an arm l, which engages with the turned-in end of the trip-lever K, by which the alarm mechanism is locked until liberated by the tripping-cam B,'which is shown in dotted outline in Fig. l.

Allthe parts thus far described are the same as may be found in many alarm-clocks and have only been described here to illustrate the application of my interrupting mechanism, which I will now proceed to describe in det-ail.

On one face of the wheel e there is a series of contrate 'teeth s, which constitute practically aV separate toothed wheel, and projecting from the verge-arbor 7c there is a rigid arm or tailpiece m, the lower end of which is turned toward the arbor c and has pivoted to it at n a tripping-piece I, of which Fig. 5 is a perspective View and which is shown in all the other figures. rlhis tripping-piece consists of a very small and light lever, having on one side a laterally-projecting tooth o and a laterally-projecting stop p and having applied between it and the tailpiece m or vergearbor 7., a very light spring q, which tends to draw and hold the stop p against the end of the tailpiece fm in such manner that the tooth 0 may either abut against one of the teeth s, as shown in Fig. 2, and so stop the vibration of the alarm-verge, or may play back and forth through a space between two of said teeth, as may be understood by'reference to Fig. 4, to permit the Vibration of the verge. The said spring is represented as a coil surrounding the arm or tailpiece 'm and having one end attached to the verge-arbor 7a and the other end connected with the stop p of the tripping-piece. In Figs. 2, 3, and a the wheel e is, except its contrate teeth s, only indicated by dotted circles, and the said teeth are shown in section, the body or disk of said wheel occupying a positionin front of the tripping-piece, so that if shown in full it would hide the tooth o.

The operation of this interrupting mechanism is as follows: Vhen the alarm-verge is liberated by the tripping of the'locking-lever K, it is only free to vibrate and produce the alarm when the tooth o of the tripping-piece IOO I is opposite a space between two of the teeth s of the wheel e, its action being interrupted every time one of the teeth s arrives opposite the said tooth o and until in the rotation of said wheel the tooth s passes said tooth o and leaves the latter free to pass to and fro between said tooth s aud the next following tooth of the said wheel, thus permitting the operation of the alarm until it is interrupted by the next tooth s presenting itself opposite the tooth 0. In this operation the trippingpiece I, having a pivotal attachment to the arm m, plays an important part, as is illustrated by Figs. 2, 3, and 4E. In Fig. 2 the tooth 0 is represented as having been just arrested by one of the teeth s. In Fig. 3 the wheel e has advanced farther, and the friction produced between the two teeth s 0, instead of producing such drag upon the time-movement as would result if the tripping-piece or tooth o were rigidly attached to the arm m, simply causes the tripping-piece to turn on its pivot n and so to carry its tooth o in a direction outward from the axis of the wheel e until it escapes from s. The spring q then by its-instantaneous action on the tripping piece throws the tooth o downward to a position opposite the space between the last-mentioned tooth s and the next one, as shown in Fig. 4, and the alarm mechanism is then again freed, the tripping-piece I being then held securely in proper relation to the arm or tailpiece m by means of the spring q, which holds the stop p against the bottom of the said arm or tailpiece.

Vhat I claim as my invention is- 1. In an alarm-clock, the combination with a time-train and an alarm-train, of a strikingescapement in said alarm-train, a toothed interrupting-Wheel in the time-train, a projection from the verge of said escapement, and a tri ppin g-piece pivoted to said projection for alternately engaging with the teeth of said interrupting -wheel and Vibrating uninterruptedly between the teeth of said wheel, substantially as herein described.

2. In an alarm-clock, the combination with a time-train and an alarm-train, of a strikingescapement in the alarm-train, a toothed interrupting-wheel in the time-train, a rigid projection from the verge of said escapement, a tripping-piece pivoted to the said projection for engagement with said interrupting-wheel and a spring applied between said trippingpiece and said projection, substantially as and for the purpose herein described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 28th day of June, 1898.

VALTER D. DAVlES.

IVitn esses:

HERBERT C. SMITH, DAVID II. M. WEYNBERG.

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