US3882669A - Device for driving day and date indicators in a wrist-watch - Google Patents

Device for driving day and date indicators in a wrist-watch Download PDF

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Publication number
US3882669A
US3882669A US474348A US47434874A US3882669A US 3882669 A US3882669 A US 3882669A US 474348 A US474348 A US 474348A US 47434874 A US47434874 A US 47434874A US 3882669 A US3882669 A US 3882669A
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US
United States
Prior art keywords
cam
shifting
wheel
watch
day
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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US474348A
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English (en)
Inventor
Edwin Jakob
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.)
Ebauchesfabrik ETA AG
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Ebauchesfabrik ETA AG
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Application filed by Ebauchesfabrik ETA AG filed Critical Ebauchesfabrik ETA AG
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Publication of US3882669A publication Critical patent/US3882669A/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
    • G04B19/25373—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by an energy source which is released at determined moments by the clockwork movement
    • G04B19/25386—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by an energy source which is released at determined moments by the clockwork movement manually corrected at the end of months having less than 31 days

Definitions

  • ABSTRACT A watch having a driving device for a day indicator and for a date indicator, which device comprises a calenderwheel for rotating at a rate of one revolution every 24 hours, a cam and a shifting member rigidly coupled to one another and rotatively supported coaxially to the calendar-wheel.
  • the shifting member having a shifting element which describes during the shift a path passing beyond the point of rotation of the cam, a banking element which strikes against a concentric portion of the cam at the conclusion of the shift, and the shifting member further comprises a drive element for the date indicator and at least one drive element for the day indicator.
  • This invention relates to a device for driving day and date indicators in a wrist-watch, comprising a calendarwheel rotating at the rate of one revolution every 24 hours, a cam coupled to the calendar-wheel in such a way as to be able to rotate freely with respect to this wheel through a certain angle, and a control member cooperating with an incline of the cam in order to cause the cam to rotate abruptly through the said angle.
  • instantaneously advancing calendar mechanisms which display the day of the week and the date, and which comprise one or two control members which pivot or slide or effect a combined motion of translation and rotation.
  • This or these control members are equipped with several auxiliary members acted upon by springs and operating in the vicinity of the day and date indicators.
  • the control member comprises a shifting element which cooperates with the incline of the cam, and a banking element separate from the shifting element, the shifting element describing during the shift a path passing beyond the point of rotation of the cam, while the banking element strikes against a concentric portion of the cam at the conclusion of the shift.
  • FIG. 1 is a plan view of the preferred embodiment, the part being shown in the position they occupy just before the spring begins to be wound,
  • FIG. 2 is a plan view of the same elements immediately after the shift
  • FIG. 3 is a section through the device.
  • FIG. 1 shows an hour-wheel 1 which drives a calendar-wheel 3 via a step-down wheel 2.
  • the calendarwheel 3 rotates clockwise, as indicated by an arrow 4, at the rate of one revolution every 24 hours.
  • the wheel 3 pivots freely on an arbor 5, the lower end of which is mounted in a bearing (not shown) borne by the plate.
  • the arbor 5 carries a cam 6 riveted on a cylindrical bearing surface thereof.
  • a stud '7 projecting from the cam 6 passes through an elongated aperture 12 of the calendarwheel 3 and enters a recess 14 of a shifting member 13.
  • This member 13 consisting of a blanked and bent metal plate, also pivots freely on the arbor 5. It is held axially by the head of the arbor 5, so that the elements 5, 13, 3 and 6 form an assembly unit.
  • the shifting member 13 is coupled directly to the cam 6 by the tenon 7, and these two members can rotate together with respect to the wheel 3 about its axis through a maximum angle of 180, which corresponds to the length of the arcuate slot 12.
  • the periphery of the cam 6 includes a concentric arcuate portion 10 which extends over approximately 220 and with which a portion of a lever 8 can enter into contact.
  • the lever 8 is acted upon by a spring 9 and pivots about a pin 8a.
  • the shifting member 13 has three fingers 15, 18, and 19 distributed along its periphery. The two fingers 18 and 19 are bent upwards and engage in teeth 20 of a day-star 21, while the finger 15, which extends in the same plane as the rest of the member 13 and is wider than the fingers 18 and 19, cooperates with teeth 16 of a date-ring 17.
  • the cam 6 is in its starting position defined by the particular orientation of its arcuate portion 10 and by the fact that a corresponding portion 11 of the lever 8 presses against it under the influence of the spring 9.
  • One end 24 of the portion 11 of the lever 8 is situated in front of a portion 26, shaped as an arc of a spiral, of the cam 6, while the other end 23 is convex and is in contact with a shoulder 22 of the cam 6.
  • This arrangement makes it possible to increase the angle, through which the cam 6 rotates under the influence of the lever 8 when the portion 24 follows the incline 26, from to --the maximum which has been obtained with the prior art devices-- up to about ll5.
  • This wide angle of rotation enables the shifting member 13 to shift'the day-star 21 through an angle corresponding to two steps of its toothing 20, as will be seen further on.
  • the device operates as follows:
  • the hour-wheel 1 actuates the calendar-wheel 3 clockwise, as designated by the arrow 4, via the wheel 2. According to the position of the wheel 3, it may freely describe a more or less long path before the end of the aperture 12 strikes against the stud 7 of the cam 6 (FIG. 1).
  • portion 22 of the cam 6 is considered as a tooth of a pinion coaxial with the arbor 5, and the portion 23 of the lever 8 is considered as an inner tooth of a wheel having its center at 8a, then it will be seen that the portion 22 rolls on the portion 23.
  • This rolling takes place along a relatively short path before the center line defined by the straight line 5-8a is reached, and along a longer path beyond that line.
  • This transmission of force quite analogous to that found in an involute gearing, ensures very high mechanical efficiency as compared with the known calendar systems utilizing a cam.
  • FIG. 2 shows the relative positions of the lever 8 and the cam 6 immediately before the shift. In this location, the cam 6 exhibits its maximum radius, and the spring 9 has reached its maximum state of winding.
  • ticularity is feasible owing to the special shape of the cam and of the lever actuating it, as well as through the shifting member disposed coaxially with the wheel and having two shifting fingers for the day of the week.
  • a watch including day and date indicators, and a device for driving the day and date indicators, comprising a calendar-wheel for rotating at the rate of one revolution every 24 hours, a cam coupled to the calendarwheel in such a way as to be able to rotate freely with respect to the said wheel through a certain angle, and a control member cooperating with an incline of said cam for causing the cam to shift by rotating abruptly through said angle, wherein'the control member comprises a shifting element which cooperates with the incline of the cam, and a banking element separate from said shifting element, the shifting element describing during the shift a path passing beyond the point of rotation of the cam, while the banking element strikes against a concentric portion of the cam at the conclusion of the shift, and a shifting member which is coupled rigidly to the cam and has a drive element for the date indicator and at least one drive element for the day indicator.
  • the day indicator comprises seven teeth or a multiple of that number
  • the shifting member comprises a number of drive elements dependent upon the number of teeth of the day indicator, said drive elements taken together for causing the day indicator to advance by one-seventh of a revolution at each shift.
  • control member is a lever acted upon by a spring.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US474348A 1973-06-05 1974-05-29 Device for driving day and date indicators in a wrist-watch Expired - Lifetime US3882669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH814173A CH573137B5 (ko) 1973-06-05 1973-06-05

Publications (1)

Publication Number Publication Date
US3882669A true US3882669A (en) 1975-05-13

Family

ID=4335774

Family Applications (1)

Application Number Title Priority Date Filing Date
US474348A Expired - Lifetime US3882669A (en) 1973-06-05 1974-05-29 Device for driving day and date indicators in a wrist-watch

Country Status (5)

Country Link
US (1) US3882669A (ko)
JP (1) JPS5343424B2 (ko)
CH (2) CH573137B5 (ko)
FR (1) FR2232788B1 (ko)
GB (1) GB1463759A (ko)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027468A (en) * 1975-10-31 1977-06-07 General Time Corporation Day-date mechanism for travel clock
US4136514A (en) * 1976-05-24 1979-01-30 Ebauches S.A. Electro-mechanic calendar timepiece
US4171610A (en) * 1976-06-16 1979-10-23 A. Schild S.A. Calendar watch movement
US4194353A (en) * 1977-05-27 1980-03-25 Compagnie Des Montres Longines Francillon Sa Analog display calendar watch
US4282592A (en) * 1978-03-30 1981-08-04 Kabushiki Kaisha Suwa Seikosha Indicating member advancing mechanism
US4974242A (en) * 1988-10-10 1990-11-27 Eta Sa Fabriques D'ebauches Calendar watch having a centrally pivoted date indicator
EP0971274A2 (en) * 1996-12-26 2000-01-12 Seiko Instruments Inc. Multi-functional timepiece
US20050128875A1 (en) * 2003-12-16 2005-06-16 Eta Sa Manufacture Horlogere Suisse Timepiece with an hour hand able to be moved forward or backward by one hour step
CN102692865A (zh) * 2011-03-23 2012-09-26 蒙特雷布勒盖股份有限公司 包括由钟表机芯控制的瞬时致动器的钟表机芯
US11429066B2 (en) * 2018-06-19 2022-08-30 Sociéte anonyme de la manufacture d'horlogerie Audemars Piquet & Cie Instantaneous control device for a date display of a timepiece

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451211A (en) * 1966-11-30 1969-06-24 Seiko Instr & Electronics Calendar watches
US3818692A (en) * 1972-10-13 1974-06-25 Schild Sa A Drive mechanism for two coaxial calendar members in watch movement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451211A (en) * 1966-11-30 1969-06-24 Seiko Instr & Electronics Calendar watches
US3818692A (en) * 1972-10-13 1974-06-25 Schild Sa A Drive mechanism for two coaxial calendar members in watch movement

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027468A (en) * 1975-10-31 1977-06-07 General Time Corporation Day-date mechanism for travel clock
US4136514A (en) * 1976-05-24 1979-01-30 Ebauches S.A. Electro-mechanic calendar timepiece
US4171610A (en) * 1976-06-16 1979-10-23 A. Schild S.A. Calendar watch movement
US4194353A (en) * 1977-05-27 1980-03-25 Compagnie Des Montres Longines Francillon Sa Analog display calendar watch
US4282592A (en) * 1978-03-30 1981-08-04 Kabushiki Kaisha Suwa Seikosha Indicating member advancing mechanism
US4974242A (en) * 1988-10-10 1990-11-27 Eta Sa Fabriques D'ebauches Calendar watch having a centrally pivoted date indicator
EP0971274A2 (en) * 1996-12-26 2000-01-12 Seiko Instruments Inc. Multi-functional timepiece
EP0971274A3 (en) * 1996-12-26 2001-03-07 Seiko Instruments Inc. Multi-functional timepiece
US20050128875A1 (en) * 2003-12-16 2005-06-16 Eta Sa Manufacture Horlogere Suisse Timepiece with an hour hand able to be moved forward or backward by one hour step
US7717616B2 (en) * 2003-12-16 2010-05-18 Omega Sa Timepiece with an hour hand able to be moved forward or backward by one hour step
CN102692865A (zh) * 2011-03-23 2012-09-26 蒙特雷布勒盖股份有限公司 包括由钟表机芯控制的瞬时致动器的钟表机芯
US20120243388A1 (en) * 2011-03-23 2012-09-27 Montres Breguet Sa Timepiece movement including an instantaneous actuator controlled by the movement
CN102692865B (zh) * 2011-03-23 2014-11-12 蒙特雷布勒盖股份有限公司 包括由钟表机芯控制的瞬时致动器的钟表机芯
US8953415B2 (en) * 2011-03-23 2015-02-10 Montres Breguet Sa Timepiece movement including an instantaneous actuator controlled by the movement
US11429066B2 (en) * 2018-06-19 2022-08-30 Sociéte anonyme de la manufacture d'horlogerie Audemars Piquet & Cie Instantaneous control device for a date display of a timepiece

Also Published As

Publication number Publication date
FR2232788A1 (ko) 1975-01-03
FR2232788B1 (ko) 1977-03-11
CH814173A4 (ko) 1975-07-15
JPS5343424B2 (ko) 1978-11-20
CH573137B5 (ko) 1976-02-27
DE2427135A1 (de) 1975-01-02
GB1463759A (en) 1977-02-09
JPS5023261A (ko) 1975-03-12
DE2427135B2 (de) 1976-06-10

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