US349025A

US349025A - Necticut

Info

Publication number: US349025A
Authority: US
Priority date: 1886-02-19
Filing date: 1886-02-19
Publication date: 1886-09-14
Anticipated expiration: 1903-09-14

Description

(No Model.)

F. M. WRIGHT 8v W. M. WOOD.

. CALENDAR CLOCK. No. e49,o25.

Patented Sept. 14, 1886.

N. PETERS. PnaiuLnrwmpmr. wnhmgmn. n. C.

UNITED STATES PATENT OFFICE.

FRANK M. VRTGHT, OF BRISTOL, AND VARREN M. VOOD, OF CHESHIRE, ASSIGNORS TO THE PARKER C\' THIPPL'E COMPANY, OF MERIDEN, CON- Nuo/Tiel fr.

CALENDAR-CLOCK.

.GPECFCATON forming part of Letters Patent No. 349,025, dated September 14, 1886,

Serial No.19-2,5.l5. (No model.)

To all wtont it may concern:

Be it known that we, FRANK M. WRTGHT, of Bristol, in the county of Hartford and State ot' Connecticut, and XVARREN M. XVoon, of

Cheshire, in the county of New Haven and State of Connecticut, both citizens of the 'United States, have invented certain new and useful Improvements in Clock-Calendars, of which the following is a specilication. Our invention relates to improvements in clock-calendars; and the main objects of our improvements are to lessen the cost of production, to simplify the construction, and to bring the day-of-the-month operating mechanism into a very compact form, so the calendar may he applied to very small clocks.

1n the accompanying drawings, Figure l is a rear elevation of our calendar mechanism as mounted upon the hack of a clock-dial. Fig. 2o 2 is a vfront elevation of the ordinary twelvehour dial-wheel with a point attached for driving our calendar mechanism. Fig. 3 is a front elevation et the pinion with which the point on the twelve-hour wheel engages; and Fig. 4 is a vertical section, partly in elevation, ot our calendar as applied to the back ot' a clockdial, in connection with the twelve-hour wheel. All of the figures are on an enlarged scale. A designates the dial-back, in the center of 3o which isa tubular shaft, a, having upon the rear side ofthe dial the day-of-the-month wheel B, provided with thirty-one teeth, and having upon the front of the dial the index linger or pointer C, said pointer and wheel both being secured to the tubular shait a, so as to necessarily rotate together. This wheel is held against accidental. rotation by means of the spring Z1.

D designates a pinion, which is mounted 4o upon a xed stud on the dial-back, as shown, and is held against accidental rotation by means of the spring c. This pinion D is of peculiar construction. lt is first made with eight leaves or teeth, like any ordinarypinion, after which tour of theleaves are cut away or removed on one side, as shown in Fig. 3, thereby producing four leaves, d, which, measuring in the direction ot" the axis of said pinion, are of less thickness than the other teeth, while the other four teeth, c, are of the full thickness ofthe pinion. For convenience, we will term these the full teeth @,and half-teethd. This pinion is placed upon the stud on the dialback in proper position to have the full teeth engage with the day-of-the-month wheel B, while the half-teeth d stand back ofthe plane of the day-of-the-month wheel B, so that they do not engage therewith.

E designates the ordinary twelve-hour wheel of a common clock, which is attached to the hour-hand socketf and connected with the clock-movement in any ordinary manner, so as to revolve once in twelve hours. XVe secure to this wheel or to the socket thereof a point or spur, g, to serve as a trip-pin for en gagement with the pinion D. Thus it will be seen that the pinion D is moved a fraction ot a revolution once in twelve hours. The full teeth e mesh or engage with the point y and the day-of-the-month wheel B, so that upon such engagement ot' the spur g and pinion D the day-of-the1nonth wheehB is moved one thirty-first of a revolution, or the space of one tooth. In twelve hours more the spur again engages the pinion D; but this time it engages one ofthe half-teeth d, and consequently the pinion D is moved without imparting any movement to the day-ofthemonth wheel. The operation will thus continue, moving the pinion D once in twelve hours and the day-of-themonth wheel B audits pointer oncein twentyfour hours.

The arrangement of the parts is very compact and simple, while the changes are made in a much shorter space of time than would be the case if the day-of-the-month wheel were moved by a twenty-four-hour wheel, as here tofore.

XVe have shown our mechanism as applied directly to the back of' an ordinary time-dial;

Y f i 2 349,025

but it is evident that the same mechanism may tially as described, and for the purpose specibe applied in other positions without changing fied. the nature of our invention.

We claim as our invention- 5 'lhe combination of the twelve-hour wheel having an operating-spur, the day-of-the- Witnesses to the signature of Wright: month Wheel, and the pinion D, the latter p1o- J. L. RUTHERFORD,

vided with full teeth and half-teeth, all of F. S. WRIGHT.

which engage the spur or point of the twelve- Witnesses to the signatnie of Vood: 1o hour wheel, and only half of which'engage the J. L. RUTHERFORD,

teeth of the day-of-the-month wheel, substanl CHARLES L. RUssELL, J r.