US3438196A - Quick-acting feed mechanism for day-and-date indicator means of timepiece - Google Patents

Quick-acting feed mechanism for day-and-date indicator means of timepiece Download PDF

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Publication number
US3438196A
US3438196A US631968A US3438196DA US3438196A US 3438196 A US3438196 A US 3438196A US 631968 A US631968 A US 631968A US 3438196D A US3438196D A US 3438196DA US 3438196 A US3438196 A US 3438196A
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US
United States
Prior art keywords
day
cam
date
projection
dial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US631968A
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English (en)
Inventor
Kazuo Teramoto
Yasuaki Nakayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Holdings Co Ltd
Citizen Watch Co Ltd
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Citizen Watch Co Ltd
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Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
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Publication of US3438196A publication Critical patent/US3438196A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
    • G04B19/25366—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement manually corrected at the end of months having less than 31 days

Definitions

  • FIG. 2 ' QUICK'ACTING FEED MECHANISM FOR DAY-AND-DATB INDICATOR MEANS OF TIMEPIECE Sheet 2 of 3 Filed April 19, 1967 FIG. 2
  • Another object is to provide a feed mechanism of the above kind which is of simple design, easy to manufacture and economic in its productive cost.
  • FIGURE 1 is a somewhat schematic top plan view of a preferred embodiment of the invention, the illustration being partially omitted and broken away.
  • FIGURES 2 and 3 are sectional views taken substantially along cutting lines IIII and IIIIII in FIGURE 1, respectively.
  • FIGURES 4 and 5 are partial views of FIGURE 1, wherein the date dial and date feed cam are shown in their different relative respective positions from that shown in FIGURE 1.
  • FIGURES 6-8 are several schematic views illustrative of different mutual positions between day star wheel and the driving cam therefor, for better understanding of the novel operation of the unique feed mechanism.
  • FIGURE 9 is a chart showing the working mode of said wheel and cam shown in FIGURES 6-8.
  • conventional hour wheel 10 is press-fit to pinion 11 so as to form a gear assembly which is mounted rotatably on canon pinion 200, said gear assembly being conventionally arranged to rotate a complete revolution per 12 hoursConventional center :wheel and pinion 201 is press fit to canon pinion 200 and in turn has rotatably mounted thereon a conventional sweep second pinion 199.
  • Center wheel and pinion 201 is rotatably supported in bearing means provided in upper and lower plates of which the upper one denoted and the upper bearing 101 are only illustrated for simplicity.
  • Gear 12 is press-fit to feed finger 13 and the resulted assembly is rotatably mounted on the plate 100 by means of a shoulder screw 202.
  • Gear 12 has a doubled tooth number relative to that of the pinion 11 and is kept in engagement therewith, so as to revolve a complete revolution per 24 hours.
  • Feed finger 13 is adapted for engagement with one of the radial projection as at 14a formed on a rotatable star wheel 14 when the finger is brought into its operating position as shown in FIGURE 1.
  • Star wheel 14 is rotatably mounted on a boss 102 formed on plate 100 and prevented from slipping out from its working position by means of stepped screw 203 screwed into said boss.
  • Jumper 15 and an intermediate wheel 24 are separately and rotatably mounted on a boss 207 formed on plate 100 and held in position by means of a screw 208 screwed into said boss 207.
  • Jumper 15 is formed with straight edges 15a and 15b and a kind of angular apex at the intersecting point of the latter.
  • Jumper spring 16 has a longer arm- 16a and a shorter arm 16b and is held in position by means of fixing screw 122 studded to plate 100', although not shown.
  • the longer arm 16a is kept always in pressure contact with jumper 15, thus urging the latter to turn in the clockwise direction in FIGURE 1 about its pivot 208, while the shorter arm 16b is kept in pressure contact with a stop pin 123 which is studded to plate 100, although not shown.
  • Gear 17 is press-fit to the boss of star wheel 14 and kept in engagement with an intermediate gear 18.
  • This gear 18 and a lever 22 are separately and rotatably mounted on a further boss 103 formed on plate 100 and prevented from slipping out from their working position by means of a cover 204, not shown in FIGURE 1,
  • Gear 18 meshes with pinion 19 which is made integral with a date dial drive cam 20, thus forming a driver assembly which is rotatably mounted on a pin 125 press-fit to bell crank lever 22.
  • Cover 204 serves for keeping the assembly 1.9 in position, of which the pinion 19 is kept in driving engagement with gear 18.
  • Lever 22 comprises an arm 22a which is urged by a spring 23 to rotate in the counter clockwise direction in FIGURE 1. Spring 23 is mounted at its operating position by means of set screw 126 which is studded to the plate 100.
  • came 29 is illustrated as if it is kept in contact with the outer periphery of date dial 21, this is only for convenience of drawing and both are separated from each other in practice.
  • Gear 24 is kept in meshing engagement with gear 17, on the one hand, and with pinion 25, on the other hand, a cam 26 being rigidly united with the pinion.
  • the cam 26 comprises a sector 26a having an arc extending within a peripheral range of about 150 degrees, a main projection or cam proper 26b, a recess 26c and an auxiliary projection 26a.
  • the day dial cam 26 is connected to pinion to rotate therewith which is rotatably mounted on a boss 100a which projects from the plate 100.
  • Cam-and-pinion assembly 25-26 is prevented from slipping out from its working position by means of day dial 28.
  • Rotatable day star wheel 27 carries a day dial 28 fixedly and concentrically attached thereon and is mounted in turn loosely on the gear assembly 10-11.
  • Disc spring 128 is inserted between star wheel 27 and normal dial 131, for exerting a downwardly directing resilient force upon star Wheel 27, when seen in FIG- URES 2-3, so as to keep the latter in proper working position.
  • the dial 131 is formed with date window 132 and day window 133 for the necessary calendar display.
  • Shaft projection 10% projects from plate 100 and mounts rotatably a conventional minute wheel pinion 129, only partially shown in FIGURE 2, which pinion is rigidly connected with conventional minute wheel 130, the former being in turn kept in engagement with said hour wheel 10. Therefore, when the regular time-keeping gear train, substantially not shown, yet including said pinion 129 and said wheel 130, is kept in motion, driving torque is transmitted from the gear train to hour wheel 10, in order to drive conventional time-indicating hands as well as the calendaring mechanism so far shown and described.
  • wheel 10 and pinion 11 rotate in unison two complete revolutions, and gear 12 revolves a complete revolution per 24 hours, respectively, as already referred to.
  • feed finger 13 is also rotated in the counter clockwise direction in FIGURE 1 from the position shown therein and the finger will exert a torque upon one of the teeth or projections 14a kept in engagement therewith.
  • the star wheel 14 is thereby rotated in the clockwise directi-on in the same figure, while the other projection such is at 14a will climb up along the edge 15a towards the apex 15c on jumper 15 for rotating the latter about its pivot 208 and against the urging action of spring 16 which is therefore further tensioned.
  • gear 17 is rotated slightly in the clockwise direction in FIGURE 1, and gear 18, pinion 1-9 and gears 24, 25 thus rotate in di rections illustrated by respective arrows shown therein.
  • Cams 20 and 26 are therefore rotated in the clockwise direction, but the date dial 21 is not driven until the driving projection 20]) will have engaged in the nearest one of notches 21a on the dial.
  • the disc part 20a is kept in slidingly idle contact with one of the recesses 21b, and cam 26 also does not influence in any way the day star wheel 27.
  • the driving projection 20b is not in contact with the bottom of the related one of notches 21a, and therefore the lever 22 is prevented from its full pivotal movement, because, in advance of the realization of the latter the lever arm 22b is brought into contact with eccentric cam or adjustable stop 29.
  • the date dial feed can be effected against a slightest possible frictional resistance acting on said dial by pressure contact of the disc portion 20a with recess 21b than otherwise encountered.
  • star wheel 27 is continued by the action of this second projection 260?, as shown in FIGURE 8, until the latter will have been disengaged from contact with the star projection 27b.
  • star wheel 27 together with day dial 28 is fed just a pitch equal to of the whole periphery of the latter, carrying thereon symbols of seven days of a week, as only partially illustrated in FIGURE 1.
  • the arc-shaped periphcry of sector 26a of cam 26 are kept in sliding contact with the opposite flanks of related two neighboring radial projections such as at 27b and 27b", for positioning positively the day dial 28 at its now appearing day display position.
  • the date dial 21 can be forcibly driven to rotate in the clockwise direction for carrying out a date correction.
  • cam disc 20 is displaced inwardly under the action of one or more projections formed at extremities of recesses 21b so that the rotation of date dial 21 may be performed with slight frictional resistance.
  • the lever 22 In the course of the date change operation, the lever 22 is held substantially at a constant position with practically no pivotal movement and thus the spring tension 23 is not altered in the practical sense, and practically no change in the driving torque for the date dial feed is produced. Therefore an important feature in designing the spring 23 is to make it strong enough to prevent any possible disturbance caused by unintentional outside force or shock.
  • FIGURE 9 the operating mode attainable by the cooperation of feed cam 26 with day star wheel 27 is shown in the form of two charts.
  • the rotational angle, 0 of day star wheel 27 is plotted against the pivotal angle, 0 of the cam 2 6 measured from the position shown in FIGURE 1.
  • the ⁇ ratio T T wherein T denotes the rotational torque of feed cam 26 and T represents the torque transmitted to day star wheel 27, is plotted again against the same angle 0
  • the angle 0 denotes an idle angle provided between the periphery of the main cam projection 2 6a and the cooperating tooth 27b of star wheel 27.
  • a quick-acting feed mechanism for day and date indicator for a timepiece comprising a rotatable day dial as well as a rotatable date dial, day and date star wheels adapted to act upon said two dials and motion control means for said star wheels, wherein the improvement comprises motion control means for said day star wheel comprising in turn a combined cam having a main projection and an auxiliary projection, a part of the periphery of said cam with exclusion of said both projections serving for positively positioning said day dial by cooperation with its related star wheel; and motion transmitting means from one of said star wheels to said date dial comprising in turn a gear train and a second cam, a member of said gear train and said second cam serving for dual purpose to feed said date dial for calendar change operation and for accurately locking the date dial when the latter is to be kept at its display position.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US631968A 1966-04-20 1967-04-19 Quick-acting feed mechanism for day-and-date indicator means of timepiece Expired - Lifetime US3438196A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3678566 1966-04-20

Publications (1)

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US631968A Expired - Lifetime US3438196A (en) 1966-04-20 1967-04-19 Quick-acting feed mechanism for day-and-date indicator means of timepiece

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US (1) US3438196A (https=)
CH (2) CH487446A (https=)
DE (1) DE1673628A1 (https=)
GB (1) GB1181841A (https=)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653200A (en) * 1969-04-10 1972-04-04 Seiko Instr & Electronics Calendar watch with separate seconds, minutes, and hours dials
US3695029A (en) * 1970-06-01 1972-10-03 Gruen Ind Inc Calendar day and date watch
US3696606A (en) * 1970-03-18 1972-10-10 Junghans Gmbh Geb Timepiece with indication of date and day of the week
US3721085A (en) * 1970-08-19 1973-03-20 Schild Sa A Calendar driving mechanism for date and week day indicating timepiece
US3789604A (en) * 1972-02-29 1974-02-05 Triebold Agon Uhren Digital watch
US3827234A (en) * 1972-08-03 1974-08-06 K Imanishi Display device for calendar watch
US20100027381A1 (en) * 2007-01-30 2010-02-04 Compagnie Des Montres Longines, Francillon S.A. Timepiece displaying the current time and including at least first and second devices displaying a time-related quantity
CN111290232A (zh) * 2018-12-10 2020-06-16 宝玑表有限公司 调节第一齿轮组相对于第一齿轮组可枢转地安在其上支架位置的系统及包括此系统的时计

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH608324B (fr) * 1976-05-03 Tavannes Ebauches Sa Mouvement de montre a calendrier comportant un organe indicateur de date.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US563268A (en) * 1893-03-06 1896-07-07 Perpetual calendar for watches or clocks
CH16964A (de) * 1898-06-09 1899-03-31 Carl Streiter Einrichtung an Uhren zum selbstthätigen Anzeigen der Tage und Monate
US2591819A (en) * 1950-02-16 1952-04-08 Rolex Montres Calendar timepiece
CH288312A (de) * 1950-02-11 1953-01-15 Ag Brac Kalendereinrichtung für Uhren, insbesondere für Taschen- und Armbanduhren.
FR57935E (fr) * 1947-09-16 1953-09-18 Montre-calendrier
US2671307A (en) * 1950-08-15 1954-03-09 Imhof Arthur Calendar indicator mechanism
FR1482957A (fr) * 1966-04-13 1967-06-02 Cie Ind De Metrologie Trophy Mécanisme dateur perfectionné
CH425641A (fr) * 1964-05-11 1967-06-15 Ebauches Bettlach Sa Montre-calendrier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT178334B (de) * 1952-06-04 1954-04-26 Kurt Wagner Zahngetriebe mit großer Übersetzung ins Langsame für Uhren
DE1209511B (de) * 1962-10-31 1966-01-20 Ebauches Sa Uhr mit schnellschaltendem Datumanzeigering

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US563268A (en) * 1893-03-06 1896-07-07 Perpetual calendar for watches or clocks
CH16964A (de) * 1898-06-09 1899-03-31 Carl Streiter Einrichtung an Uhren zum selbstthätigen Anzeigen der Tage und Monate
FR57935E (fr) * 1947-09-16 1953-09-18 Montre-calendrier
CH288312A (de) * 1950-02-11 1953-01-15 Ag Brac Kalendereinrichtung für Uhren, insbesondere für Taschen- und Armbanduhren.
US2591819A (en) * 1950-02-16 1952-04-08 Rolex Montres Calendar timepiece
US2671307A (en) * 1950-08-15 1954-03-09 Imhof Arthur Calendar indicator mechanism
CH425641A (fr) * 1964-05-11 1967-06-15 Ebauches Bettlach Sa Montre-calendrier
FR1482957A (fr) * 1966-04-13 1967-06-02 Cie Ind De Metrologie Trophy Mécanisme dateur perfectionné

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3653200A (en) * 1969-04-10 1972-04-04 Seiko Instr & Electronics Calendar watch with separate seconds, minutes, and hours dials
US3696606A (en) * 1970-03-18 1972-10-10 Junghans Gmbh Geb Timepiece with indication of date and day of the week
US3695029A (en) * 1970-06-01 1972-10-03 Gruen Ind Inc Calendar day and date watch
US3721085A (en) * 1970-08-19 1973-03-20 Schild Sa A Calendar driving mechanism for date and week day indicating timepiece
US3789604A (en) * 1972-02-29 1974-02-05 Triebold Agon Uhren Digital watch
US3827234A (en) * 1972-08-03 1974-08-06 K Imanishi Display device for calendar watch
US20100027381A1 (en) * 2007-01-30 2010-02-04 Compagnie Des Montres Longines, Francillon S.A. Timepiece displaying the current time and including at least first and second devices displaying a time-related quantity
KR101418625B1 (ko) 2007-01-30 2014-07-14 꼼빠니데스몬트래스론진,프란시론쏘시에떼아노님 시간관련 정보를 나타내는 제 1 디스플레이 장치와 제 2 디스플레이 장치를 적어도 포함하며 현재 시각을 나타내는 시계
US8937850B2 (en) * 2007-01-30 2015-01-20 Compagnie Des Montres Longines, Francillon S.A. Timepiece displaying the current time and including at least first and second devices displaying a time-related quantity
US9778621B2 (en) 2007-01-30 2017-10-03 Compagnie Des Montres Longines, Francillon S.A. Timepiece displaying the current time and including at least first and second devices displaying a time-related quantity
CN111290232A (zh) * 2018-12-10 2020-06-16 宝玑表有限公司 调节第一齿轮组相对于第一齿轮组可枢转地安在其上支架位置的系统及包括此系统的时计
CN111290232B (zh) * 2018-12-10 2022-08-02 宝玑表有限公司 调节第一齿轮组相对于支架位置的系统及包括其的时计
US11550264B2 (en) 2018-12-10 2023-01-10 Montres Breguet S.A. System for adjusting the position of a first toothed wheel set relative to a support on which the first toothed wheel set is pivotably mounted and timepiece comprising such a system
US11899402B2 (en) 2018-12-10 2024-02-13 Montres Breguet S.A. System for adjusting the position of a first toothed wheel set relative to a support on which the first toothed wheel set is pivotably mounted and timepiece comprising such a system

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Publication number Publication date
DE1673628B2 (de) 1972-04-27
DE1673628A1 (de) 1972-04-27
CH566867A4 (https=) 1969-11-28
CH487446A (de) 1969-11-28
GB1181841A (en) 1970-02-18

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