CH660439GA3 - Clockwork movement with perpetual calendar mechanism - Google Patents

Clockwork movement with perpetual calendar mechanism Download PDF

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Publication number
CH660439GA3
CH660439GA3 CH395684A CH395684A CH660439GA3 CH 660439G A3 CH660439G A3 CH 660439GA3 CH 395684 A CH395684 A CH 395684A CH 395684 A CH395684 A CH 395684A CH 660439G A3 CH660439G A3 CH 660439GA3
Authority
CH
Switzerland
Prior art keywords
cam
date
runner
yoke
days
Prior art date
Application number
CH395684A
Other languages
French (fr)
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 filed Critical
Priority to CH395684A priority Critical patent/CH660439GA3/en
Publication of CH660439GA3 publication Critical patent/CH660439GA3/en

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Classifications

    • 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
    • G04B19/2536—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 automatically corrected at the end of months having less than 31 days

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Abstract

The date-indicating runner (10) is actuated automatically at month end so that its indicating member keeps up to date. To do this, the cam (23) is driven at a rate of one step per day four days in succession at each month end. In months of fewer than 31 days, the yoke (26) drops into a cleft in the cam, thus engaging the sliding-gear pinion (30) with the toothing (35) of the date-drive runner (7). The runner (10) is thus driven 1, 2 or 3 steps in a period of a few hours after the finger (8) has made it execute its usual switching movement. To ensure an additional 2 and not 3 switchings at the end of February in leap years, the cam (23) carries a satellite (46) whose finger (48) prolongs the corresponding lug of the cam (23) when the latter is in front of the beak (26b) of the yoke, once every 4 revolutions. <IMAGE>
CH395684A 1984-08-17 1984-08-17 Clockwork movement with perpetual calendar mechanism CH660439GA3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH395684A CH660439GA3 (en) 1984-08-17 1984-08-17 Clockwork movement with perpetual calendar mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH395684A CH660439GA3 (en) 1984-08-17 1984-08-17 Clockwork movement with perpetual calendar mechanism

Publications (1)

Publication Number Publication Date
CH660439GA3 true CH660439GA3 (en) 1987-04-30

Family

ID=4267081

Family Applications (1)

Application Number Title Priority Date Filing Date
CH395684A CH660439GA3 (en) 1984-08-17 1984-08-17 Clockwork movement with perpetual calendar mechanism

Country Status (1)

Country Link
CH (1) CH660439GA3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH318902A (en) * 1954-02-05 1957-01-31 Bringolf John Calendar timepiece
GB2005052A (en) * 1977-08-22 1979-04-11 Citizen Watch Co Ltd Calendar mechanism for timepieces
JPS5866085A (en) * 1981-10-14 1983-04-20 Kawaguchiko Seimitsu Kk Case with glass for watch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH318902A (en) * 1954-02-05 1957-01-31 Bringolf John Calendar timepiece
GB2005052A (en) * 1977-08-22 1979-04-11 Citizen Watch Co Ltd Calendar mechanism for timepieces
JPS5866085A (en) * 1981-10-14 1983-04-20 Kawaguchiko Seimitsu Kk Case with glass for watch

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 156 (P-209)[1301], 8 juillet 1983; & JP - A - 58 66 085 (KAWAGUCHIKO SEIMITSU K.K.) 20-04-1983 *

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