US76567A - Improvement in clook-alakms - Google Patents

Description

CHARLES H. WARNER, -oE NEW RAVEN, CONNECTICUT.

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IMPROVEMENT nv oLocE-ALARMS.

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To ALL WHOM 1T MAY CONCERN; i Y Be it known-that I, CHARLES H. WARNER, of New Haven, in the county of New Haven; and `State o f Connecticut, have invented a new Improvement in Clo'ck- Alarxns; and I- do hereby declare the' follow`ing,-when takeufin connection with vthe accompanying drawings and the letters of reference marked thereon, -t o be a full, clean-and exact description of thesame, and which said drawings constitutepart of thisl specification, and represent, inl,- A l A I Figure 1, n. front vie'w, and iu v less, and 'commonly called eight-d ay elocks, and consists in the peculiar construction and arrangement of an alarm-attachment, which, being wound up at the 'same time the clock itself is wound, -will automatically sound the alarm at a given hour, during the twenty-four hours ofthe day, and continue so to do, each day, during the time the clock is allowed to run. A Heretofore it has been necessary to wind the alarm 'each day, and this must be done after thetwelfth hout* from the time the alarm is given, inasmuch as'the alarm would Abe sounded once every twelvejhourskwere the alarm wound up, and when once started, the alarm sounds until its power is exhausted. This, i'n eight-day clocks, is a great inconvenience, and, lfor an alarm-clock, deprives it of any advantage over a common thirty hour clock. By my improvement all the vdiiiiculties existingn the arrangement, as `ordinarily produced, are entirely overcome. i

To enable others to construct my improvement, Iwill proceed todescribe the same, as'illustrated in 'the' accompanying drawings. i

This invention relates to an improvement in clocks whichare-constructedto run for Aeight days, more or A is,the front plate cfa common eight-day-clock movement, and has fixed upon th'e 4hourhand shaft the'4 usual dal,B,'which isset, in the usual manner, to indicate the time'the alarm is to be sounded, On the 'same spindle is a pinion, C, working into a wheel, D, twi'ce`the size of the pinion C, causing the said wheel D to make one revolution in each twenty-four hours, in the direction denoted b'y the arrow.- On the shaft of 4the wheel isl arranged a cam, F, (see iig. 2,) denotedbybroken lines, iig. 1,-upon which ,rests one cud' of a lever, G, the

other end being pivoted at H, and' from the lever Gr a rod, I, connects with the alarm.

.It this arrangement be used for an alarm of ordinary construction, the alarm may be wound at' any time, but cannot be sounded until the twenty-four hours have passed, so as to permit the lever Gto fall upon theicam,v as denoted in fig. 1, the position 4in the drawing being that at theinstant the alarm is sounded, and, in red, as raised, and waiting the revolution of the cam, so that the arm may fall oil` and sound the alarm. Below the movement, or at any convenient point for attachment to thelever G, I arrange the alarm-' movement, the said movement being arranged between two plates, L L, in the usual manner of clock-movements;

' The construction is as follows: Upon a shaft, n, I arrange a toothed wheel, M, and to the same shaft a spring, N, attached to the shaft or wheel, so that when the spring is wound up by the turning' of the shaft, and locked by a pawl, Zr, in the' usual manner, the action of the spring N is, when free, to cause the revolution 'of the wheel M, -and thesnid wheel M-has fixed upon its side several pins, d, more or less in number, but arranged so las to leave one space larger than the others, as from dl to d2, the object'of which will be lhereafter described.

'The Wheel M works into a pinion, l?, on a shaft, c, and on the said shaft is arranged the striliingwheel R, (a

portion of which is broken away in iig. 1,) which operates, by its 4revolution *through the hammer vS, 'solas to soundv the alarm upon the bell T, which may or may not be the same-bell upon which the hours are struck. On the shaft c is-arranged a cam, U, which, at one point, has a notch, W, formed, and from a shaft, f, an arm, l, extends down, and its end arranged so as to rest upon the cam U, and so that when the notchin the cam is prea sented, the end will fall into the said notch, as denoted in iig. 1; and from the same'shaft,f, an arm,-z, extends forward, and lies so as to rest upon the pins oZ upon the wheel M, but so that when the space between thev pinsdf and d2 arrives beneath the arm 7L, then the hrm h falling thereinto, will'permit the end of the lever y to fall into the notchW in the cam U'; but when the lever g is raised from the notch in the cam U, the said cam will" revolve by the action of the spring thereon, through the wheel M, and the several pins on the wheel'M willhold` the arm h up, as denoted in red, and consequently the lever g from the cam U, until the space on .the'wheel M

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