US830781A - Intermittent-alarm clock. - Google Patents

Description

PATENTED SEPT. 11, 1906.

G. L. GOODRICH. INTERMITTENT ALARM CLOCK.

APPLICATION FILED JANF| 1906.

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PATENTED SEPT 11-, 1906.

G. L. GOODRIGH.

INTERMITTENT ALARM CLOCK.

APPLICATION FILED JAN.8.1906.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT OFFICE.

GEORGE L. GOODRICH, OF BRISTOL, CONNECTICUT, ASSIGNOR TO THE E. INGRAHAM CO., OF BRISTOL, CONNECTICUT, A CORPORATION.

lNTERMlTTENT-ALARM CLOCK- Specification of Letters Patent.

Patented Sept. 11, 1906.

Application filed January 8,1906. Serial No. 295,069-

To all] wit/mt it iii/by concern:

Be it known that 1, GEORGE L. Goonnrcn, a citizen of the United States, residing at Bristol, in the county of Hartford andv State of Connecticut, have invented a new and useful Improvement in Intermittent Alarm Clocks; and I do hereby declare the following, when taken in connection with the accompanying drawings and the figures of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a partial view, in front elevation, of an intermittent-alarm-clock movement constructed in accordance with my invention, the front movement-plate being removed; Fig. 2, a side view thereof; Fig. 3, a plan view thereof; Fig. 4, a detached view of the oscillating intermittent-alarm lever.

My invention relates to an improvement in intermittentalarm clocks, the object being to provide simple, durable, and reliable alarm mechanism for such clocks.

With these ends in view my invention con sists in a clock having certain details of con struction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In carrying out my invention, as herein shown, I mount an oscillatory alarm-lever 2, having a bearing-hole 3, upon the center arbor 4, which passes through the said hole. The said lever is formed at its upper end with a ring-lil e cam 5, containing a stop-tooth 6 and receiving a pin 7, extending rearward into it from an escapement-wheel 8, enga ed by a verge 9, mounted upon a verge-ar or 10, carrying a hammer-arm 1 1 (broken away) and provided with a depending stop-wire 1.2, coacting with the usual let-off spring 13. The wheel 8 is driven by a wheel 14, driven by the main wheel 1 5, which is mounted upon a winding arbor 16, carrying the alarmspring. (Not shown.) The alarm-train may be of any approved construction and has nothing added to it more than the pin 7 in the wheel 8.

At its lower end and upon its inner face the lever 2 is furnished, as shown, with two pawls 17 18, operated by springs 19 19 and arranged to engage with the teeth of the minute-wheel 20 of the time-train, this wheel being frictionally mounted in the usual manner upon the center arbor 4 and driven by a lantern-pinion 21, meshed into by the time main wheel 22, which is mounted on the time winding-arbor 23, upon which the timespring is wound. The time-train may be of any approved construction and is unmodified for the purposes of my invention.

When in the operation of the clock the letoff spring 13 is released and permitted. to disengage itself from the stop wire 12, the alarm-train is restrained by the engagement of the pin 7 with the tooth 6 of the lever 2 and by the engagement of one or the other of the pawls 17 and 18 with a tooth of the wheel 20. WVith the lever 2 thus coupled by one of the pawls 17 and 1.8 with the wheel 20 the lever will be slowly rocked until the tooth 6 has been sufficiently inclined to release the pin 7, and hence the alarm-train, which will at once start and sound the alarm. Now as the escapement wheel 8 revolves the pin 7 will coact with the inner edge of the cam 5 and oscillate the lever 2, the pawls 17 and 18 of which will be moved back and forth under the teeth of the wheel 20 but the pin 7 will continue to ride over the stoptooth 6 until the wheel 20 presents a tooth in such a way to the pawl 17 or to the pawl 18 as to permit either one to be reengaged with the wheel. Vhen this takes place, the pin 7 when it strikes the stop-tooth 6 can no longer swing the lever 2 sufficiently to ride over and so escape from the said tooth; but the lever, being coupled to the wheel 20, will be held rigidly, with the result of stopping the alarmtrain. The power of the alarm-spring, how-' ever, will still act, through the pin 7, to

slowly rock the lever 2 from left to right until it has been rocked. far enough to release the pin 7, when the alarm will be sounded again and the lever 2 oscillated until the other of its two pawls 17 and 18 has been engaged with a tooth of the wheel 20 and the alarm-train again stopped. In this way the alarm will be intermittently sounded until the alarm-spring runs down or until the alarm side of the clock has been cut out in any convenient manner-as, for instance, by a stop-cam 24, arranged. to coact with the verge 9 and mounted upon an arbor 25, furnished at its rear end with a finger 26.

Instead. of employing two alternately-opcrating pawls 17 and 18 I may employ one.

This needs no illustration. The construction and mode of operation remain the same, with the single difference that the alarm sounds twice as long. Two pawls divide," so to speak, each tooth interval on the wheel 20. In carrying out my invention I may therefore make some chan es from the construction herein shown. %would therefore have it understood that I do not limit myself thereto, but hold myself at liberty. to make such departures therefrom as fairly fall within the spirit and scope of my invention.

I claim-- 1. In an intermittent alarm clock, the combination with the time and alarm trains thereof, of an oscillating alarm-lever coacting with a member of the alarm-train for oscillation thereby, and one or more pawls pivotally mounted upon the said oscillating alarmlever and coacting with one of the wheels of the time-train. 2. In an intermittentalarm clock, the combination with the time and alarm trains thereof, of an oscillating alarm-lever formed at one end with a cam and a stop-tooth, a pin mounted in one of the wheels of the alarmtrain for coacting with the said cam and stop* tooth, and one or more sprin actuated pawls carried by the lower end 0 the said lever and coacting with one of the wheels of the time-train.

3. In an intermittentalarm clock, the combination with the time and alarm trains thereof, of' a stop-pin located in the escapement-wheel of the alarm-train, an oscillating alarm-lever fulcrumed concentrically with the center arbor of the time-train and formed at its upper end with a cam coacting with the said pin for oscillating the lever and with a stop-tooth coacting with the said pin for stopping the alarm-train, and means carried by the said lever for coupling it with a Wheel of the time-train.

In testimony whereof I have signed this specification in the presence of two subscriblng witnesses.

GEORGE L. GOODRICH.

Witnesses:

S. W. HOWE, M. F. MANOR.

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