US1108636A - Automatic alarm time-clock. - Google Patents

Description

G. B. STARR.

AUTOMATIC ALARM TIME 0 APPLICATION IILBD JAN.

LOCK.

Patented. Aug. 25, 19M

WITNESSES:

sh nit 3 UNITED STATES PATEN T OFFICE.

GEQRGE B. STARR, OF OAKLAND. CALIFORNIA, ASSIGNOR 0F ONE-HALF T0 0. J. MEADS, I

OF OAKLAND, CALIFORNIA.

AUTOMATIC ALARM TIME-C1400.

- Application filed January 21, 1913.

Specification of Letters Patent.

Be it known that l, Gnonon B. STARR, a citizen of the United States, residing at Oakland, in the county of Alameda and State of Jalifornia, have invented new and useful IIJPIOVGIHGIHZS in Automatic Alarm TimeClocks. of which the following is a specification.

This invention relates to an automatic timer which can be setto run a definite period of time, and to notify the operator at the expiration of that time.

The invention has been particularly applied in practice in keeping track of time in cooking eggs, etc., having been successfully used as an automatic alarm egg timer. Manifestl however, it is capable of general use wherever lapsed time is to be kept track or".

The invention consists of the parts and the combination and construction of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which Figure 1 is a front elevation of the apparatus. Fig. 2 is a front elevation of the operating mechanism. Fig. 3 is a plan View of Fig. 2. Fig. 4 is a detailvertical section on line X-X, Fig. 3. Fig. 5 is adetail vertical section on line Y-Y, Fig. 3. Fig. (I- is a detail perspective view of the locking and releasing mechanism.

A is a dial which may be graduated by minutes and fractions thercoi or other desircal subdivisions of time.

2 is an indicator or hand traveling over the dial. This indicator is mounted on a which is acted on by the main spring: 4- and adapted to be turned against the tension of said spring by suitable means, as the key 5. Shaft 5 carries a mutilated gear c constructed and arranged, when the shaft 5-? has been turned against the tension of its spring a predetermined distance, to engage a gear 7 arranged in the alarm system after the following manner: llcar 7 is mounted loose on What I shall term the alarm shaft 8, Which latter may be wound. against the tension of its spring 9. 10 is a ratchet wheel fixed on shaft 8 and operated on by a, spring-pressed pawl 11 on the loose gear 7. Turning the key 5 to the left to wind up spring 4 also turns the l'llutilatcd gear 6, which latter when it engages with the loose gear 7 W111 lock gear 7 to shaft 8 'If for instance the device is l l l l its pawl ll and ratchet 10, to turn the alarm shaft 8 against the tcnsion of its spring 5) to wind the alarm mcclmnism.

The alarm mechanism -which I have shown comprises in addition to the foregoing parts, the following train of gears 12 is a loose gear on alarm shaft 8 carrying the pawl 13 adapted to engage a ratchet 14 fixed on alarm shaft 8. Loose gear 12 engag a pinion 15 on a counter-shaft 16, which latter carries a spur gear 17 which operates the alarm lever in the manner Well known in the art.

Lever 18 carries a. hammer 19 to sound the bell 20.

In addition to the indicator hand main shaft 3 carries a trip finger 21 ed to engage a bell a spring detent 23 path of the alarm lever 18. The alarm can not go off until the 2, the adaptcrank 22, which operates to release the arm.-

he operation of the device is as follows: used as a, timer for indicating the length of time an egg is to be boiled, the key 5 with the indicator hand standing at zero is turned to the left to the point marked 3 minutes on the dial, or such other time for which the egg is to be boiled, at the same time the article is deposited in the hot Water. This turning of the key Winds up the mechanism. Immediately on the release of the key the mechanism acting under the tension of the main spring 4, governed by the usual escapernent and balance common in clocks and not necessary here to be shown or described, the hand 2 gradually moves backward over the dialv until the indicator or hand 2 returns to zero. Simultancously with the return of the indicator to zero the trip finger 21 on hait engages the bell cran: 22 and operates the spring detent. 23 to release the pressure on the alarm lever 18. Since the ,alarm mechanism now free to turn, the mutilaled gear having turned back so that there are no teeth on it engaging the companion gear 7, the alarm will operate by the reason of the energy stored in the spring 9; the mutilated portion of the gear 6 allowing the gear 71o turn free. By this construction the indicator 2 nonnally stands at the zero mark on the dial, which point is the initial point from which time is computed. \Vhcn the clock is set it is set with reference to the initrip finger 21' engages the bell crank and moves the spring detent I normally disposed in the i tisl position of the indicator and. when the indicator returns to initial position alarm is released and 1101;; before, The

5 eperates t0 turn theiiidiceter iii one direc 5 tion and the spring to return it t initial position; there heingne catches on the main shaft the letter begins its return movement imnieclietely'on the release of the key and the spring is Weuricl only EuLilC lQlfll] to run the timer tor the particular period of time of three minutes, or three hours, or Whatever other time the timer is set for.

Having this described myinventien, What '1 claim and. clesirete secure by Letters Patent is:

1. In an automatic e'lsriii timer zi'spriiig ctiietecl Winding shaft, alarm mechanism, means to hold" the alarm inoperative means whereby' epera'tioii of the Winding shaft Windsseicl elerm mechanism, including a member which is isengegecl from the alarm "mechanism after i the winding shaft has mew/"ed a, predetermined distance, and means operated by the Winding shaftto releasethe alerrii mechanism liolc M g means seer (liseiige'g'eme it of seid'meiiiber from the alarm meeheiiishiff v '5 :2. In an zilite h(itie alarm timer e Winding shaft, zilslriii mechanism means t0 hold the 39 alarm inoperitive, means operative by said.

actuated winding shaitt, a mutilated gear on seicl shaft, alarm mechanism including a spring actuated alarm shaft and. a hammer carrying lever, means for winding the alarm shaft from the gear, a trip finger carried by said winding shaft, a bell crank arranged. to have 'e'sie arm thereof engaged by said trip finger, a spring detent normally (lisposecl in the path of the hammer carrying lever, and means carried by the other arm of the hell crank to actuate said detent to release thehammerearryingtlever after the In testimony whereof I have hereunto set my hand the presence of two subscribing Witnesses.

" GEORGE B. STARR.

WY thesses i geer has been disengaged from the winding

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