US3664120A - Drive mechanism for an indicator of the date or the days of the week - Google Patents

Drive mechanism for an indicator of the date or the days of the week Download PDF

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Publication number
US3664120A
US3664120A US74071A US3664120DA US3664120A US 3664120 A US3664120 A US 3664120A US 74071 A US74071 A US 74071A US 3664120D A US3664120D A US 3664120DA US 3664120 A US3664120 A US 3664120A
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US
United States
Prior art keywords
gear
driving mechanism
indicator
cam
lever
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
Application number
US74071A
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English (en)
Inventor
Jean-Pierre Golay
Bernard Gerber
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.)
Record Watch Co SA
Original Assignee
Record Watch Co SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Record Watch Co SA filed Critical Record Watch Co SA
Application granted granted Critical
Publication of US3664120A publication Critical patent/US3664120A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

Definitions

  • a driving mechanism for a date-or-day indicator comprises a gear driven at the rate of n revolutions daily and carrying a pivotal lever adapted for meshing with a drive gear secured to the indicator, The lever is moved by a cam coaxial with the drive gear and located in the same plane of the lever and revolving at the rate of (n l) revolutions daily in the same direction as the driven gear so that a nose of the cam causes the lever to enter once every 24 hours into the path of the drive gear to advance the indicator.
  • the invention relates to a driving mechanism for a day or date indicator of a timepiece.
  • a problem in driving date-or-day indicators is the need for the changeover to take place once each day in the shortest possible time.
  • the present invention contemplates a driving mechanism of a timepiece for an indicator indicating the day of the month or the days of the week.
  • the driving mechanism comprises a gear secured to the indicator to drive the same, a rotary member driven at the rate of n revolutions daily, an actuating lever pivotably connected to said rotary member and rotatable therewith, and cam means rotating at the rate of n l revolutions daily and engageable with said actuating lever to pivot the same once every 24 hours into a position in driving relation with said gear to cause the lever to advance the gear and the indicator therewith at the rate of speed of the rotary member.
  • Two such driving mechanisms can be paired so as to drive a day and a date indicator simultaneously.
  • FIG. 1 is a plan view partly broken away showing one embodiment according to the invention
  • FIG. 2 is a perspective view of a portion thereof.
  • FIG. 3 is a section taken along line IIIIII of FIG. 2.
  • the day indicator movement comprises a rotatable plate at the periphery of which are inscribed the days of the week.
  • a gear 4 is secured to the plate 1 for common rotation therewith.
  • the gear 4 is advanced once every 24 hours by an arm 3 of a lever 5 as will be explained later.
  • the lever 5 is pivotably connected by a pin 6 to a gear 7 which is driven in rotation so as to make n revolutions daily.
  • Lever 5 is in abutment with a cam 8 coaxial with gear 7 and rigidly connected with a gear 10 driven in rotation at the rate of n 1 revolutions daily.
  • the cam 8 and lever 5 lie in a common plane above gear 7.
  • the passage of a nose 9 on cam 8 pposite lever causes the arm 3 on lever 5 to engage the teeth of gear 4 as shown in FIG. 1 and to rotate the gear 4 in concert with the gear 7.
  • a resilient detent 11 holds the indicator plate 1 in position until the plate is driven by arm 3.
  • the gear 4 is driven by arm 3 to advance the plate and position the next day in the window shown in chain dotted outline in FIG. 1.
  • the arm 3 drives the gear 4 at the rate of rotation of the gear 7, the gear 4 will be driven n times as fast as compared to a conventional arrangement in which the arm is driven at the rate of l revolution per day. Thus the day change will take place n times more quickly. In practice, it has been found preferable to select the order of magnitude of n as 8.
  • FIG. 3 shows in greater detail the components of the drive for a toothed date indicator rim 2.
  • This drive is mounted beneath gear 7, symmetrical to the drive described for plate 1.
  • the advance of rim 2 is effected by arm 3 shown in FIGS. 1 and 2.
  • the arm 3' is on a lever 5 (FIG. 3) identical to lever 5, but mounted on the lower face of gear 7, symmetrical to lever 5.
  • the lever 5 is pivotably mounted on gear 7 on pin 6' symmetrical with pin 6.
  • the lever 5' is actuated by a cam 8 identical to cam 8, the cam 8 being mounted in the same plane as the lever 5 and symmetrically with cam 8.
  • Cam 8' is also rigidly connected to gear 10 and is driven at a rate of n 1 revolutions daily, so
  • Cams 8 and 8' are each in the shape of a curvilinear triangle whose three sides are formed by three identical arcs. The cams are driven about respective axes which are offset from their centers of symmetry.
  • Levers 5 and 5 have a profile such that they are positively driven by the respective cams and therefore require no return spring.
  • rim 2 makes one revolution a month and that plate 1 carries two series of the seven days of the week and makes one half-revolution each week. Without such arrangement, the pitch of the teeth of gear 4 would become too large unless such wheel were of very small diameter.
  • the day and date indicators are advanced at a speed of n revolutions daily by carrying the actuator levers 3 and 3 on rotary gear 7 rotating at n revolutions daily and moving the levers into operative driving positions with respect to their indicators once every 24 hours by means of the cams 8 and 8' which rotate about an axis common with the gear 7 at a speed of n l revolutions daily.
  • the cams each make one revolution daily relative to the gear 7 thereby effecting movement of the levers to operative position once every 24 hours.
  • a driving mechanism for a day or date indicator comprising a gear secured to the indicator to drive the same, a rotary member driven at the rate of n revolutions daily, an actuating lever pivotably connected to said rotary member and rotatable therewith, and cam means rotating at the rate of n 1 revolutions daily and engageable with said actuating lever to pivot the same once every 24 hours into a position in driving relation with said gear to cause the lever to advance the gear and the indicator therewith at the rate of speed of the rotary member.
  • a driving mechanism as claimed in claim 4 wherein the cam and lever are shaped so that the lever is positively driven by the cam throughout 360 rotation of the cam.
  • a driving mechanism as claimed in claim 4 comprising a first gear driving said rotary member and a second gear coaxial with said first gear and of different diameter driving said cam.
  • a driving mechanism as claimed in claim 4 comprising a second indicator, one indicator for the day, the other for the date, and a second driving mechanism including an actuating lever and a cam symmetrically disposed with respect to said rotary member.
  • a driving mechanism as claimed in claim 8 comprising a common shaft for said rotary member and said cams, said shaft passing through said levers, the cam and actuating lever of one drive mechanism being disposed at one face of said rotary member, while the came and actuating lever of the other driving mechanism are disposed at the opposite face of the rotary member.
  • a driving mechanism as claimed in claim 9 wherein said arms of the two actuating levers are diametrically opposite one another, the gear secured to one indicator being an external gear and the gear secured to the other indicator being an internal gear, one am being engaged with the external gear while the other is engaged with the internal gear so that the arms drive said indicators simultaneously.
  • a driving mechanism as claimed in claim wherein the indicator for the days of the week includes the seven days of 5 the week repeated at least once at the periphery of the corresponding indicator.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Adornments (AREA)
US74071A 1969-09-23 1970-09-21 Drive mechanism for an indicator of the date or the days of the week Expired - Lifetime US3664120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1433669A CH512765A (fr) 1969-09-23 1969-09-23 Mécanisme d'entraînement d'un indicateur de quantième et/ou de jours de la semaine

Publications (1)

Publication Number Publication Date
US3664120A true US3664120A (en) 1972-05-23

Family

ID=4399947

Family Applications (1)

Application Number Title Priority Date Filing Date
US74071A Expired - Lifetime US3664120A (en) 1969-09-23 1970-09-21 Drive mechanism for an indicator of the date or the days of the week

Country Status (5)

Country Link
US (1) US3664120A (en)van)
JP (1) JPS4842513B1 (en)van)
CH (2) CH1433669A4 (en)van)
DE (1) DE2046522C3 (en)van)
FR (1) FR2062973B1 (en)van)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818692A (en) * 1972-10-13 1974-06-25 Schild Sa A Drive mechanism for two coaxial calendar members in watch movement
DE2512416A1 (de) * 1974-04-08 1975-10-23 Timex Corp Uhr mit datums- und tagesanzeige
US5187693A (en) * 1990-04-04 1993-02-16 Montres Rolex S.A. Device for controlling and correcting the display of the day and date for a watch, and a wrist watch fitted with such a device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU794596A1 (ru) 1978-06-23 1981-01-07 Научно-Исследовательскийинститут Часовой Промышленности Календарное устройствоМгНОВЕННОгО дЕйСТВи
JPS5865627U (ja) * 1981-10-27 1983-05-04 ミツミ電機株式会社 磁気ヘツドのコアホルダ−構造

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948107A (en) * 1958-05-10 1960-08-09 Buren Watch Company S A Date-watch
US3436905A (en) * 1966-01-11 1969-04-08 Ebauchesfabrik Eta Ag Watch having improved means for driving date and day-of-the-week indicating members
FR1563142A (en)van) * 1968-02-28 1969-04-11
US3439493A (en) * 1967-01-10 1969-04-22 Bulova Watch Co Inc Day-date calendar timepiece

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH323055A (fr) * 1955-03-22 1957-07-15 Looping S A Pièce d'horlogerie à réveil comprenant un calendrier automatique
CH347774A (fr) * 1958-05-10 1960-07-15 Bueren Watch Company S A Montre à quantième simple
CH444055A (fr) * 1965-09-07 1967-02-28 Montres Perret Et Berthoud Sa Pièce d'horlogerie à quantième semi-instantané
FR1568274A (en)van) * 1968-03-25 1969-05-23

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948107A (en) * 1958-05-10 1960-08-09 Buren Watch Company S A Date-watch
US3436905A (en) * 1966-01-11 1969-04-08 Ebauchesfabrik Eta Ag Watch having improved means for driving date and day-of-the-week indicating members
US3439493A (en) * 1967-01-10 1969-04-22 Bulova Watch Co Inc Day-date calendar timepiece
FR1563142A (en)van) * 1968-02-28 1969-04-11

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818692A (en) * 1972-10-13 1974-06-25 Schild Sa A Drive mechanism for two coaxial calendar members in watch movement
DE2512416A1 (de) * 1974-04-08 1975-10-23 Timex Corp Uhr mit datums- und tagesanzeige
US5187693A (en) * 1990-04-04 1993-02-16 Montres Rolex S.A. Device for controlling and correcting the display of the day and date for a watch, and a wrist watch fitted with such a device

Also Published As

Publication number Publication date
CH1433669A4 (en)van) 1971-04-15
FR2062973A1 (en)van) 1971-07-02
FR2062973B1 (en)van) 1974-03-01
DE2046522C3 (de) 1973-10-25
CH512765A (fr) 1971-04-15
DE2046522A1 (de) 1971-05-13
DE2046522B2 (de) 1972-11-30
JPS4842513B1 (en)van) 1973-12-13

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