US2537886A

US2537886A - Calendar chronometer

Info

Publication number: US2537886A
Application number: US572130A
Authority: US
Inventors: Frank Louis
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-01-10
Filing date: 1945-01-10
Publication date: 1951-01-09
Anticipated expiration: 1968-01-09

Description

Jan. 9, 1951 L. FRANK CALENDAR CHRONOMETER 2 Sheets-$heet 2 Filed Jan. 10, 1945 I INIL'NTOR. Lou/5 F'RHNK Jan. 9, 1951 1.. FRANK CALENDAR CHRONOM ETER 2 Sheets-Sheet 1 Filed Jan. 10, 1945 INVENTOR. L o u/s F12 a N/\ Patented Jan. 9, 1951 UNITED STATES FATENT OFFICE].

CALENDAR CHRON'OMETER;

Louis Frank, Fellows..alif.

Application January 10, 1945, Serial. No. 572,130

. 4 Claims.

t My invention relates generally to chronometers such as the conventional forms of clocks and watches, and more particularlyto an attachment which may be readily combined with practically all clockand watch movements and operated thereby, for indicating the names of the months, the numbers of the days thereof and. the names of the days of' the week, thus in effect, providing in the onestructur'e a combined clock and calend'ar.

I One of the principal objects of my invention is, to provide a; calendar attachment ofthecharacter referred to which is'simple in structure, inexpensive of manufacture and which is very compact so thatnoadditional space is requiredfor its installation; inasmuch as practically all forms "of-clocks and watches now manufactured, have ample space between the dial and movement,

for-the-re'cepti'on of thecalendar mechanism. .a

A further'object of my invention is, to provide simple; practical and convenient means for manually actuating and setting the calendar attachment, so as to compensate for those-months having" twenty-eight and twenty-nine or thirty days.

My invention also embodies other and more detailed objects and advantages which will become more apparent as the disclosure proceeds;

In the accompanying drawings, wherein similar reference characters designate corresponding parts throughout the several views:

Fig. 1 is? a front e'levational view of a calendar clock embodyingrny invention.

Fig. 2" is a' vertical section taken through the front portion of the clock. just behind the dial and showing the calendar attachment in front elevation- Fig. 3 is a horizontal section taken on the line 3-3 of Fig. 2.

Fig. 4 is a perspective view of the parts of the calendar attachment in segregated disposition.

Fig. 5 is a detail section taken on the line 55 of Fig. 2.

Fig. 6 is a detail section taken on the line t6 of Fig. 2.

Fig. '7 is a detail section taken on the line 1-1 of Fig. 2.

Fig. 8 is a vertical section taken on the line 8-8 of Fig. 2.

Fig. 9 is an elevational view taken looking in the direction of thearrow 9 in Fig. 8.

Referring by numerals to the accompanying drawings, which illustrate a preferred embodiment of my invention, l0 designates the housing of a conventional clock (or watch) II the hour wheel, i2 the'hourhand and t3 the minute hand. A- Geneva wheel 54 having eight equally spaced notches, [5 is mounted for rotation on a stud Hi to the side of the hour wheel H and projecting from the face of said wheel it, are four equally spaced pins H. A pin i t projects from the face of hour wheel H and successively engages in notches" 15, thus intermittently'rotating the Geneva wheel M. Formed in the face of Geneva wheel M areeight equally spaced recesses l8, which are adapted to successively receive a stud I S, pressed inwardly from a resilient finger 20, that is mounted on stud It, thus providing a spring detent for'said wheel M.

Sealed in the frame of the clock' movement below the hour-wheel is a stud 2|, onwhich is mounted a ratchet wheel 22, having thirty-one teeth and formed in the face of this wheel directly opposite said teeth are shallow depressions 23. Appearing on the face of this wheel 22 directly opposite and adjacent the teeth thereof are the numerals; from i. to 31 inclusive. Projecting from the face of the wheel 22' adjacent the toothed edge thereof is a pin 24. Mounted on stud 2| is an arm 25 and projecting from the end thereof adjacent said teeth. are diverging fingers 26 and 2?.

J ournalled on. a stud 28'which is seated in the end of finger 26'; is a ratchet wheel 29, having seven teeth, one foreach day of. the week' and the face of said wheel adjacentthe teeth thereof, bearing the names or abbreviations of the names offt e dayofthe week".v

The teeth of wheel Z'Qtravel in a. circular path adjacent thepath' traveled by the teeth of ratchet wheel 22, and thus the. teeth of both

wheels

22 and 29 are engaged and intermittentl rotated by pins I! of Geneva wheel M.

An L-shaped resilient member 38 is secured to stud 2i and one of the arms of said member has an inwardly pressed stud 3 i, which passes through an aperture 32 in arm 26 and engages successively in recesses 33 that are formed in the face of wheel 29 adjacent the teeth thereof, thus in efiect providing a spring ,detent for said wheel (see Fig. 6).

The other arm of resilient member is pivoted with a stud 34 which passes through an aperture 35 in arm 2! and engages successively in the recesses 23 in wheel 22, thus providing a spring detent for said wheel. (See Fig. '7.)

Journalled on a stud 36 seated in the end of arm 25 opposite the

fingers

26 and 21, is a ratchet wheel 3! having twelve teeth, one for each month and the face of bearing the names of the months the month wheel 22.

and being provided with twelve depressions 38. A flat spring 9, secured at M to arm 25 and its other end having a stud 42, which passes through an aperture 43 in said arm and engages in the recesses 23, provides a spring detent for the month wheel 31.

The manually operable means for rotating the wheel 22 to compensate for the different number of days of different months, is illustrated in Figs. 8 and 9 and such means includes an arm 44, journalled on stud 2!, and the free end of said arm, carrying a spring pressed detent 45 which engages the teeth of ratchet wheel 22.

The arm is pushed upwardly to move wheel 22 the distance of one tooth, by a spring held plunger 46, operating through the bottom of case or housing lfl. (See Fig. 3.) As hour wheel H rotates pin H and successively engages in the notches l of the Geneva wheel 14 and pins I! of said Geneva wheel intermittently engage the teeth of the week day wheel 29 and day of Two complete revolutions of the hour wheel are required to move week day wheel 29, one tooth, or one-seventh of a complete revolution and the day of the month wheel 22 one tooth, or one thirty-first of a complete revolution, for the reason that the Geneva wheel has eight notches l5 and four pins 11 and thus there is a hiatus or t me interval equal to one notch between the engagements of the pins I I with the teeth of

wheels

22 and 29.

Once every revolution of wheel 22, pin 24 engages and rotates wheel 31 the distance of one notch or one twelfth of a revolution. Thus in every thirty-one days the hour wheel H makes sixty-two complete revolutions to one revolution of the day of the month wheel 22, seven and three-fourths revolutions of the Geneva wheel, four and three-sevenths of a revolution of the days of the week wheel 29, and one-twelfth of a revolution of the month wheel 31.

Tooth H engages one of the teeth of wheel 22 and moves same the required distance before it engages the tooth of wheel 29 and moves same the proper d stance (one tooth). In other words, pin I1 moves wheel 29, one seventh of a complete rotation and wheel 22, one thirty-first of a complete rotation.

As seen in Fig. 1, portions of the dial of the clock or watch are cut away to form windows W through which the markings on the

wheels

29, 22 and 31 may be readily observed.

Thus it will be seen that I have provided a calendar attachment for clocks, watches and the like, which is simple in structure, inexpensive of manufacture and very effective in performing thefunctionsfor which it is intended.

It will be understood that minor changes in the size, form and construction of the various parts of my improved chrono-meter attachment may be made and substituted for those herein shown and described without departing from the spirit of my invention, the scope of which is set forth in the appended claims.

I claim as my invention:

1. The combination with a chronometer including a frame and an hour wheel, journalled thereon, which hour wheel has a pin projecting from its face, of a calendar mechanism including a Geneva wheel journalled on said frame,

and provided with a series of notches which successively receive the pin ofthe hour wheel, a bracket mounted on said frame below said hour and Geneva wheels, a week day indicating ratchet wheel journalled on said bracket, the toothed edge of which overlies the edge of the Geneva wheel, a day of the month indicating ratchet wheel, journalled on said bracket, the edge of which day of the month indicating ratchet wheel lies between the overlapping edges of said Geneva wheel and said week day indicating wheel and pins projecting from the face of said Geneva wheel for simultaneously engaging teeth of said day of the week and day of the month wheels, to move same the distance of one tooth each.

2. The combination as set forth in claim 1, with a month indicating ratchet wheel journalled on said bracket and a pin projecting from the face of said day of the month wheel for engaging the teeth of said month indicating wheel and rotating same the distance of one tooth at a time.

3. The combination as set forth in claim 1, with manually operable means mounted on-said bracket for imparting step by step movement to said day of the month ratchet wheel.

4. The combination as set forth in claim 1, with detent means mounted on said bracket for holding said week day ratchet wheel and said day of the month wheel at predetermined points in their rotation.

LOUIS FRANK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS u Number Name Date 412,796 Rosenburg Oct. 15, 1889 1,234,829 Trane July 31,..1917 2,123,091 Becker July 5, 1938 FOREIGN PATENTS Number Country Date 430,109 Great Britain June 13, 1935