US3205650A - Clocks with date indicators - Google Patents

Clocks with date indicators Download PDF

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Publication number
US3205650A
US3205650A US249920A US24992063A US3205650A US 3205650 A US3205650 A US 3205650A US 249920 A US249920 A US 249920A US 24992063 A US24992063 A US 24992063A US 3205650 A US3205650 A US 3205650A
Authority
US
United States
Prior art keywords
date
disc
gear
lever
frame
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
US249920A
Other languages
English (en)
Inventor
Trimpler Walter
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Application granted granted Critical
Publication of US3205650A publication Critical patent/US3205650A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04B19/25306—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches
    • 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
    • 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

  • this indicator arrangement consisting of one or two date discs, to be advanced in 24 hour intervals at midnight, so that at the end of months having less than 31 days, the arrangement has to be indexed forward manually by one or more intervals, in order to maintain the correct date indication sequence.
  • a feature of this invention is that the necessary arrangement for date indexing requires relatively few components which are simpl to manufacture and which, in I addition, are easily accommodated in a clock.
  • a further feature of the invention lies in the fact that the date change can take place in a very short period of less than 10 minutes through the medium of the clock movement, without an additional spring arrangement.
  • the ratio of the minute pinion to the change gear is 1:3, and the ratio of the planet wheel to the sun wheel is 6:5
  • the ratio of the minute pinion to the change gear is 1:4 with a planet to sun wheel ratio of 8:7, or 8:9.
  • FIG. 3 is a vertical section on the line IIIIII of FIG. 2.
  • FIGS. 6 and '7 are front views of the date discs shown in FIGS. 4 and 5.
  • the reference numeral 1 shows, in part only, a dial plate having a rectangular window 2 appropriately placed to show the date.
  • a date disc means 3 is mounted on bearings in a support plate 4 so that it will rotate about the shank of a rivet 5 closely behind the dial plate 1. Near its periphery, the front face of the date disc 3 is provided with equally spaced numbers in sequence from 1 to 31, and thirty-one teeth 6 are cut in the periphery of the disc.
  • the support plate 4 is fitted with three bracing components bent towards the rear, to which a front clock movement plate 13 is aflixed by means of small wedges 12 with the interposition of rubber buffers 11.
  • a front clock movement plate 13 is aflixed by means of small wedges 12 with the interposition of rubber buffers 11.
  • a dial train can be driven by means of a pinion 23 actuated by the clock mechanism, the said pinion being indicated in dot-dash outline in FIG. 3 but not being otherwise shown, and projecting through an aperture (not shown) in the clockmechanism plate 13, so that it meshes with a gear wheel 24 which is mounted on the minute shaft 14 in friction driving engagement with shaft 14.
  • the dial train is then in fact driven by the clock mechanism, but can be adjusted without regard to the position of the clock movement.
  • an arrangement can be used consisting, for instance, of a pinion 25 shown in dot-dash outline in FIG. 3, mounted on a manually operable adjuster shaft (not shown), the said pinion meshing with gear wheel 19 of the change gear 19, 20.
  • the reduction ratio of the minute pinion 21 to the wheel 19 of the change gear should be great enough for the change gear unit 19, 20 to complete a whole number of revolutions in 24 hours.
  • the total reduction between minute shaft 14 and hour shaft 15 should have a ratio of 12:1, and in view of the coaxial positioning of the two shafts 14 and 15, the reduction ratio of minute pinion 21 to the change gear wheel 19 should not vary too greatly from the reduction ratio between pinion 20 of the change gear and the hour gearwheel 22.
  • the ratio of minute pinion 21 to change gear wheel 19 should preferably be 1:3 or 1:4, so that the change gear revolves six or eight complete turns in 24 hours.
  • the ratio of planet gear 28 to sun gear 26 must either be 6:5 or 6:7. If the change gear unit carries out eight revolutions in 24 hours, then the ratio of the planet gear 28 to gear 26 must be 8:7 or 8:9. If the ratio is in fact 6:5 or 8:7, then in 24 hours the indexing pin 29 will follow a retarded cycloidal path, whereby it only resumes the same position for switching after s x or eight revolutions; on the other hand if the teeth ratio is 6:7 or 8:9, then the indexing pin will follow an advanced cycloidal path in 24 hours, with the same result.
  • the indexing pin 29 can be used directly for forward indexing of the date disc 3.
  • the forward indexing of the date disc occurs as finger 32 and lever 33 swing in a clockwise direction in FIGS. 1 and 3, whereby the indexing component 36 moves along the steep slope of a tooth notch in the date disc 3 and then engages the next radial tooth face and then pushes the disc forward by one step. 011 its return movement the indexing component 36 slides back along the same steep slope and snaps over the peak of the next tooth, moving outwardly under spring loading within the lever slot 34.
  • the indexing arrangement operates in such a manner that whilst an indexing step is being made, and expediently on the first renewal step, the date disc 41, which will remain at a halt over 16 indexing steps, is adjusted simultaneously with the rear disc 42.
  • the design incorporating two date discs as suggested has the advantage of permitting a dial face window 2' and numbers on the discs of twice the size of those in the single disc arrangement.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US249920A 1962-01-13 1963-01-07 Clocks with date indicators Expired - Lifetime US3205650A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0023992 1962-01-13

Publications (1)

Publication Number Publication Date
US3205650A true US3205650A (en) 1965-09-14

Family

ID=7038023

Family Applications (1)

Application Number Title Priority Date Filing Date
US249920A Expired - Lifetime US3205650A (en) 1962-01-13 1963-01-07 Clocks with date indicators

Country Status (2)

Country Link
US (1) US3205650A (en:Method)
CH (2) CH26163A4 (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2836245A1 (fr) * 2002-02-20 2003-08-22 Jacques Andre Finet Dispositif d'affichage de date a guichet pour montre

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537886A (en) * 1945-01-10 1951-01-09 Frank Louis Calendar chronometer
US2632293A (en) * 1950-04-21 1953-03-24 Felsa S A Corrector for calendar clockworks
US2720746A (en) * 1953-06-30 1955-10-18 Bulova Watch Co Inc Indicator mechanism
FR1169572A (fr) * 1955-10-21 1958-12-31 Montre De Sport Geneve S A Pièce d'horlogerie avec calendrier
US3036424A (en) * 1959-04-23 1962-05-29 Certina Kurth Freres S A Time-piece indicating the days of the month

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537886A (en) * 1945-01-10 1951-01-09 Frank Louis Calendar chronometer
US2632293A (en) * 1950-04-21 1953-03-24 Felsa S A Corrector for calendar clockworks
US2720746A (en) * 1953-06-30 1955-10-18 Bulova Watch Co Inc Indicator mechanism
FR1169572A (fr) * 1955-10-21 1958-12-31 Montre De Sport Geneve S A Pièce d'horlogerie avec calendrier
US3036424A (en) * 1959-04-23 1962-05-29 Certina Kurth Freres S A Time-piece indicating the days of the month

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2836245A1 (fr) * 2002-02-20 2003-08-22 Jacques Andre Finet Dispositif d'affichage de date a guichet pour montre
WO2003071361A3 (fr) * 2002-02-20 2004-06-03 Jacques Finet Dispositif d'affichage de date a guichet pour montre
EP2090942A3 (fr) * 2002-02-20 2010-07-28 Audemars Piguet Holding S.A. Dispositif d'affichage de date à guichet pour montre

Also Published As

Publication number Publication date
CH406986A (de) 1965-08-31
CH26163A4 (en:Method) 1965-08-31

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