US165548A - Improvement in calendar-clocks - Google Patents

Description

A. A. CWLES..

Calendar-Clock;

N,O 55548. PmnwdlulyisJas.

WITN ESSES INVENTOR UNITED STATES ALFRED A. cowLEs,

PATENTOEEICE.

oE NEW Yoan, N. Y.

IMPROVEMENT 1N CALENDAR-CLOCKS,

Speciiication forming part of Letters Patent No. 165,548, dated July' 13, 1875; application tiled. May 8,1675.

To all whom fit may concern y Be it known that I, ALFRED A. CowLEs, of the city of New York, in the county ot' New York and State of New York, have invented a new and valuable Improvementin Calendars 5 and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and gnres of reference marked thereon.

Figure l ot' the drawings is arepresentation of a perspective view ot' my calendar-clock, and Fig. 2 is a detail view ot' the same.

This invention has relation to calendar mechanism which is especially designed for hanging and mantel clocks, and which can be applied to such clocks without changing their construction in any manner whatever, and when applied will be operated automatically once every twenty-four hours, as will be understood from the following description.

'In the annexed drawing, A designates the frame ot' a wellknown striking-clock designed to run eight days. The pinion-shaft of the second strike-wheel is extended through the frame A, and provided with a single leaf, a, which at every revolution ot' said shaft will engage with a tooth on a large wheel, B, and move this wheel the distance ot one tooth. rlhe wheel B has its bearing on a stud, b, at the back of frame A, around which stud it is allowed to turn freely in the direction indi cated by the arrow in the drawing. Wheel B is prevented from turning backward by means of a spring-pawl, c, and at a certain point on this wheel B is a stud, c, which is designed for engaging with the hooked end f ot' a vertical rod, (l. Bod C works in guides gg ixed to frame A, and it extends to the mechanism which carries the cloth on which the numbers ot' the days of the months are printed. D D designate two rollers, the shafts ot' which have their bearings in a frame, E, secured iu a suitable position to the case of. the clock. On these rollers the strip h is wound, which has printed upon it the numbers ofthe days of' the month, which numbers will be successively exposed to view through an aperture made in a plate not shown in the drawing. rlhe shaft of the lower roller D has a studded disk, J, applied on it, which is caused to engage with it when turned in 011e direction by means ot' a ratchetwheel, i, and a pawl,j. The lower end of the rod G is hooked and the extreme end ot' this hook Z is beveled for a purpose hereinafter explained.

G designates a light spring, which causes the lower portion ofthe rod C to bear lightly against the studs a on disk J. The disk J is prevented from turning backward by means of a spring-pawl, m, which engages with teeth on the periphery ot' the disk. When the leaf a. is at rest it does not strike the wheel B, but leaves it perfectly free and disconnected `from the works ot' the clock. Vhen the clock is striking the leaf a makes one revolution for each stroke of the hammer, pushing wheel B forward one tooth with eachA revolution.

lnasmuch as a clock makes one hundred and iftysix strokes every twenty-four hours, it t'ollo ws that the wheel B, having one hundred and iiftysix teeth, will make a complete revolution every twenty-four hours. N ow, let the wheel B be so adjusted that at the last stroke ot' ll p. m, the stud e is brought directly under the hook f ot' rod C. At the first stroke of l2 the stud e will catch the hook and begin to raise rod C with a regular motion corresponding to the strokes ot' the hammer. At the same time the lower end ot rod C catches one ot the studs a on disk J and transmits motion to the rollers D D of the calendar cloth. At the eleventh or twelfth stroke ot' midnight the stud e will have passed far enough to release rod C and'allow it to drop by its own weight. The lower liftingfhook d otl rod G will, during its fall, snap past the succeeding stud u, and lie directly under this stud ready for another lifting-stroke, which is repeated every twentyfour hours.

The calendar described is for the days of the month only, but the same principle ot' coustruction is applicable for registering the days ot' the week.

Then the calendar-cloth has been wound from the upper roller D upon the lower roller l) it can be wound back upon the first roller combined with hooked liftingrod C, spring G, by means ot' a key applied on the square end and the clock-actuating mechanism, substanofthe shaft of this roller. tially as described.

W'lmt I claim as new, and desire to secure In testi lnony that I clniln the above, I have by Letters Patent, ishereunto subscribed my nume in the presence l. In combination with the striking mechof two Witnesses. :mism of n clock the leaf a, toothed Wheel B, ALFRED A. COWLES. rod C, and calendar mechanism, substantially Witnesses: as described. O. W. GRAVES,

2. Studded disk J on the shaft of roller D, A. J. BRINKERHOFF.

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