US3681913A - Carry-over mechanism with variable ratios - Google Patents

Carry-over mechanism with variable ratios Download PDF

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Publication number
US3681913A
US3681913A US56856A US3681913DA US3681913A US 3681913 A US3681913 A US 3681913A US 56856 A US56856 A US 56856A US 3681913D A US3681913D A US 3681913DA US 3681913 A US3681913 A US 3681913A
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US
United States
Prior art keywords
month
profile
cam
days
february
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
US56856A
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English (en)
Inventor
Fermo Solari
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.)
Solari & C SpA
Solari & C/udine Spa
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Solari & C SpA
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Publication date
Application filed by Solari & C SpA filed Critical Solari & C SpA
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Publication of US3681913A publication Critical patent/US3681913A/en
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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
    • G04B19/25373—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
    • G04B19/2538—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 automatically corrected at the end of months having less than 31 days

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
US56856A 1969-07-30 1970-07-21 Carry-over mechanism with variable ratios Expired - Lifetime US3681913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6054569 1969-07-30

Publications (1)

Publication Number Publication Date
US3681913A true US3681913A (en) 1972-08-08

Family

ID=11291489

Family Applications (1)

Application Number Title Priority Date Filing Date
US56856A Expired - Lifetime US3681913A (en) 1969-07-30 1970-07-21 Carry-over mechanism with variable ratios

Country Status (3)

Country Link
US (1) US3681913A (de)
JP (1) JPS5124904B1 (de)
DE (1) DE2037062A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909966A (en) * 1973-12-28 1975-10-07 Amano Corp Operating device for perpetual calendar
US4031642A (en) * 1973-04-14 1977-06-28 Motomu Aoki Automatic calendar
US4188774A (en) * 1976-10-04 1980-02-19 Ebauches S.A. Electro-mechanical calendar timepiece
US20070189122A1 (en) * 2006-02-14 2007-08-16 Franck Muller Watchland S.A. Secular Perpetual Calendar

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031642A (en) * 1973-04-14 1977-06-28 Motomu Aoki Automatic calendar
US3909966A (en) * 1973-12-28 1975-10-07 Amano Corp Operating device for perpetual calendar
US4188774A (en) * 1976-10-04 1980-02-19 Ebauches S.A. Electro-mechanical calendar timepiece
US20070189122A1 (en) * 2006-02-14 2007-08-16 Franck Muller Watchland S.A. Secular Perpetual Calendar
US7480211B2 (en) * 2006-02-14 2009-01-20 Franck Müler Watchland S.A. Secular perpetual calendar

Also Published As

Publication number Publication date
JPS5124904B1 (de) 1976-07-27
DE2037062A1 (de) 1971-05-19

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