GB957031A - Clock with date indicator - Google Patents
Clock with date indicatorInfo
- Publication number
- GB957031A GB957031A GB80163A GB80163A GB957031A GB 957031 A GB957031 A GB 957031A GB 80163 A GB80163 A GB 80163A GB 80163 A GB80163 A GB 80163A GB 957031 A GB957031 A GB 957031A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disc
- wheel
- tooth
- indexing
- numbers
- 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
Links
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission Devices (AREA)
- Electromechanical Clocks (AREA)
Abstract
957,031. Ratchet gearing. K. DIEHL. Jan. 8, 1963 [Jan. 13, 1962], No. 801/63. Heading F2Q. [Also in Division G3] A clock is provided with a date indicator wherein a disc 3 bearing the date numbers 1 to 31 is indexed forwardly each day, the indexing being performed through a change gear 19, 20 in the time train and of which the gear-wheel 19 is driven from a pinion 21 on the minute shaft 14, the wheel 19 carrying a planet wheel 28 which engages a fixed sun wheel 26 coaxial with the change gear 19, 20, the tooth count of the minute pinion 21, the wheel 19, the planet wheel 28, and the sun wheel 26 being so related that an indexing pin 29 carried by the planet wheel occupies, once every twentyfour hours, a position where it co-operates with means for indexing the date disc. The indexing pin 29 co-operates with one arm 32 of a lever having a second arm 33 to which is secured one end of a spring wire pawl member 35, the other end of which is threaded through a slot 34 of the lever arm 33 and formed into a part 36 which engages ratchet teeth 6 on the disc 3 to index it past a spring detent 8, 9. The disc is adjusted manually through a third arm 40 of the lever to allow for the different number of days in the months. In a modification which enables the numbers to be increased in size without increasing the disc diameter, these numbers are divided between two coaxial ratchet discs 41, 42, Figs. 6 and 7, of which one disc 41 has a window 43 co-operating with a fixed window 2, Fig. 1, the numbers on the other disc showing through both windows whilst the first disc is held stationary. Fifteen normal teeth 44 on disc 41 are of greater diameter than fifteen normal teeth 45 on disc 42, whilst a remaining sixteenth depressed tooth 46 on disc 41 allows a spring wire pawl to miss this tooth and index only the second disc 42 until a lower notch 48 of a sixteenth remaining tooth on disc 42 allows the pawl to engage the depressed tooth 46 and commence indexing the first disc.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED37917A DE1195236B (en) | 1962-01-13 | 1962-01-13 | Clock with date display |
Publications (1)
Publication Number | Publication Date |
---|---|
GB957031A true GB957031A (en) | 1964-05-06 |
Family
ID=7043844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB80163A Expired GB957031A (en) | 1962-01-13 | 1963-01-08 | Clock with date indicator |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1195236B (en) |
GB (1) | GB957031A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373558A (en) * | 1965-08-30 | 1968-03-19 | Makiri Uria | Calendar clock or watch |
US3518825A (en) * | 1967-05-03 | 1970-07-07 | Walter Nissen | Indicating device |
EP1536300A1 (en) * | 2003-11-26 | 2005-06-01 | ETA SA Manufacture Horlogère Suisse | Calendar mechanism for a watch comprising two superposed date annuli |
EP1536299A1 (en) * | 2003-11-26 | 2005-06-01 | ETA SA Manufacture Horlogère Suisse | Calendar mechanism for a watch comprising two superposed date annuli |
WO2006106787A1 (en) * | 2005-03-30 | 2006-10-12 | Citizen Holdings Co., Ltd. | Display device and calendar device of timepiece |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE631335C (en) * | 1935-11-29 | 1936-06-25 | Agne Knoes Herbert Germundson | Mechanical calendar |
CH288312A (en) * | 1950-02-11 | 1953-01-15 | Ag Brac | Calendar devices for clocks, in particular for pocket watches and wristwatches. |
CH278048A (en) * | 1950-02-11 | 1951-09-30 | Ag Brac | Calendar devices for clocks, in particular for pocket watches or wristwatches. |
CH328143A (en) * | 1956-01-25 | 1958-02-28 | Zenith Montres | Semi-instantaneous release date timepiece |
CH340780A (en) * | 1958-08-30 | 1959-08-31 | Ed Kummer Ag Uhrenfabrik | Calendar timepiece |
CH346164A (en) * | 1959-08-05 | 1960-04-30 | Erard Raoul H | Instantaneous drive mechanism for a date crown for a timepiece |
-
1962
- 1962-01-13 DE DED37917A patent/DE1195236B/en active Pending
-
1963
- 1963-01-08 GB GB80163A patent/GB957031A/en not_active Expired
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3373558A (en) * | 1965-08-30 | 1968-03-19 | Makiri Uria | Calendar clock or watch |
US3518825A (en) * | 1967-05-03 | 1970-07-07 | Walter Nissen | Indicating device |
US6925032B2 (en) | 2003-11-26 | 2005-08-02 | Eta Sa Manufacture Horlogère Suisse | Timepiece with a date mechanism comprising two superposed date rings |
EP1536299A1 (en) * | 2003-11-26 | 2005-06-01 | ETA SA Manufacture Horlogère Suisse | Calendar mechanism for a watch comprising two superposed date annuli |
JP2005156563A (en) * | 2003-11-26 | 2005-06-16 | Eta Sa Manufacture Horlogere Suisse | Clock having date mechanism equipped with two overlapped date rings |
JP2005156562A (en) * | 2003-11-26 | 2005-06-16 | Eta Sa Manufacture Horlogere Suisse | Clock having date mechanism equipped with two overlapped date rings |
EP1536300A1 (en) * | 2003-11-26 | 2005-06-01 | ETA SA Manufacture Horlogère Suisse | Calendar mechanism for a watch comprising two superposed date annuli |
US6934221B2 (en) | 2003-11-26 | 2005-08-23 | Eta Sa Manufacture Horlogère Suisse | Timepiece with a date mechanism comprising two superposed date rings |
JP4523835B2 (en) * | 2003-11-26 | 2010-08-11 | ウーテーアー・エス・アー・マニファクチュール・オロロジェール・スイス | Watch having a date mechanism with two date rings superimposed |
JP4537183B2 (en) * | 2003-11-26 | 2010-09-01 | ウーテーアー・エス・アー・マニファクチュール・オロロジェール・スイス | Watch having a date mechanism with two date rings superimposed |
WO2006106787A1 (en) * | 2005-03-30 | 2006-10-12 | Citizen Holdings Co., Ltd. | Display device and calendar device of timepiece |
CN101151583B (en) * | 2005-03-30 | 2010-05-19 | 西铁城控股株式会社 | Display device and calendar device of timepiece |
US7738324B2 (en) | 2005-03-30 | 2010-06-15 | Citizen Holdings Co., Ltd. | Display device and timepiece calendar device |
Also Published As
Publication number | Publication date |
---|---|
DE1195236B (en) | 1965-06-16 |
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