US3688490A - Jumper for a calendar watch mechanism - Google Patents

Jumper for a calendar watch mechanism Download PDF

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Publication number
US3688490A
US3688490A US212246A US3688490DA US3688490A US 3688490 A US3688490 A US 3688490A US 212246 A US212246 A US 212246A US 3688490D A US3688490D A US 3688490DA US 3688490 A US3688490 A US 3688490A
Authority
US
United States
Prior art keywords
jumper
arm
day
date
wheels
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
US212246A
Other languages
English (en)
Inventor
Toshihiko Oki
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.)
Suwa Seikosha KK
Original Assignee
Suwa Seikosha KK
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 Suwa Seikosha KK filed Critical Suwa Seikosha KK
Application granted granted Critical
Publication of US3688490A publication Critical patent/US3688490A/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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • 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
    • 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
    • G04B19/25313—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement
    • G04B19/25326—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement manually corrected at the end of months having less than 31 days

Definitions

  • ABSTRACT A Jumper for a calendar watch having both day and date wheels has two arms joined together and adapted to pivot about a point proximate the junction.
  • the jumper of the present invention is designed with two arms one of which makes contact with the day wheel and the other of which makes contact with the date wheel. At the junction of the two arms, the jumper is pivoted about a pin on a plate.
  • the effective doubling of the length of the jumper in accordance with the present invention reduces its stiffness and makes it possible to construct the jumper of heavier material than would otherwise be the case, without exerting excessive drag on the driving mechanism of the calendar watch.
  • an object of the present invention is an improved jumper in a calendar watch which is of sturdy construction and yet imposes minimum drag on the driving mechanism of said watch.
  • Another object of the present invention is an improved jumper which is suitable for automatic assembly, thereby lowering costs of manufacture.
  • a further object of the invention is an improved jumper for a calendar watch which eliminates the need for external springs for the operation thereof.
  • the single FIGURE is a plan view, partly broken away, of a calendar watch having therein a jumper mechanism in accordance with the present invention.
  • a calendar watch in accordance with the present invention has a date dial 1, a day star wheel 2 secured to a day disc 3 and a day and datedriving wheel 4. Secured to day and date driving wheel 4 are date driving finger 5 and day driving finger 6.
  • Day and date driving wheel 4 is rotated by a wheel train (not shown) operated by a suitable source of energy such as a cell or a mainspring.
  • the rotation of driving wheel 4 causes rotation of date dial 1 by means of date driving finger 5.
  • the fact that the two arms of jumper 8 operate together decreases the effective force of jumper 8.
  • contact 8(a) exerts only enough force against date wheel 1 to cause it to make the desired motion quickly.
  • day driving finger 6 rotates day star 2 through intermediate day wheel 7 and contact portion 8(0) of jumper 8 will provide only that force necessary to position date star wheel 2.
  • the mechanism is so arranged, as by adjusting the relative lengths of the two arms of jumper 8 so that the changes in the day and the date do not take place simultaneously.
  • jumper designed as is jumper 8 of the present invention can exert a weaker force than a jumper of single length but of the same cross-section makes it possible to increase the spring cross-section so that the spring can be formed from a single sheet.
  • the manufacturing process is simplified as is the assembly process, so that automatic assembly is made possible.
  • the drag imposed by the contact portions of jumper 8 is so small that a watch employing such a jumper is not apt to stop at the instant when the day and the date are being changed.
  • an improved jumper comprising a first arm, a spring portion of said first arm, a contact portion at one end of said first arm,
  • an improved jumper as defined in claim 1, wherein the length of said arms is such that said day and date wheels are moved non-simultaneously to minimize the force necessary to effect the movements.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
US212246A 1970-12-28 1971-12-27 Jumper for a calendar watch mechanism Expired - Lifetime US3688490A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1970132711U JPS5040618Y1 (tr) 1970-12-28 1970-12-28

Publications (1)

Publication Number Publication Date
US3688490A true US3688490A (en) 1972-09-05

Family

ID=15087769

Family Applications (1)

Application Number Title Priority Date Filing Date
US212246A Expired - Lifetime US3688490A (en) 1970-12-28 1971-12-27 Jumper for a calendar watch mechanism

Country Status (4)

Country Link
US (1) US3688490A (tr)
JP (1) JPS5040618Y1 (tr)
FR (1) FR2120056B1 (tr)
GB (1) GB1341319A (tr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771308A (en) * 1972-02-16 1973-11-13 Roamer Watch Co Sa Day-date timepiece advancing and correcting device
US11921460B2 (en) 2020-05-01 2024-03-05 Rolex Sa Device for displaying an indication of time or derived from the time and indexing device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3904962B1 (fr) 2020-05-01 2023-08-02 Rolex Sa Dispositif d'indexation et dispositif d'affichage d'une indication horaire ou dérivée de l'heure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH260353A (fr) * 1947-06-26 1949-03-15 Ltd Leonidas Watch Factory Dispositif de sautoir coopérant avec deux roues dentées.
CH310560A (fr) * 1953-08-26 1955-10-31 Record Watch Co S A Pièce d'horlogerie à calendrier.
DE1927243A1 (de) * 1969-05-29 1970-12-03 Kienzle Uhrenfabriken Gmbh Kalendermechanismus
US3608305A (en) * 1969-04-28 1971-09-28 Fontainemelon Horlogerie Coordinated combined releasable day and date jumper mechanism for calendar timepieces

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH367760A (fr) * 1961-02-03 1962-11-15 Venus Ebauches Montre-calendrier
JPS4511971Y1 (tr) * 1966-08-03 1970-05-27

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH260353A (fr) * 1947-06-26 1949-03-15 Ltd Leonidas Watch Factory Dispositif de sautoir coopérant avec deux roues dentées.
CH310560A (fr) * 1953-08-26 1955-10-31 Record Watch Co S A Pièce d'horlogerie à calendrier.
US3608305A (en) * 1969-04-28 1971-09-28 Fontainemelon Horlogerie Coordinated combined releasable day and date jumper mechanism for calendar timepieces
DE1927243A1 (de) * 1969-05-29 1970-12-03 Kienzle Uhrenfabriken Gmbh Kalendermechanismus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771308A (en) * 1972-02-16 1973-11-13 Roamer Watch Co Sa Day-date timepiece advancing and correcting device
US11921460B2 (en) 2020-05-01 2024-03-05 Rolex Sa Device for displaying an indication of time or derived from the time and indexing device

Also Published As

Publication number Publication date
DE2165085A1 (de) 1972-07-20
GB1341319A (en) 1973-12-19
FR2120056A1 (tr) 1972-08-11
JPS5040618Y1 (tr) 1975-11-19
DE2165085B2 (de) 1975-07-03
FR2120056B1 (tr) 1974-10-11

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