Patent US2241889A successfully refreshed from Google Patents.
Patent US3688490A successfully refreshed from Google Patents.
US3688490A
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Jumper for a calendar watch mechanism
Assignee: Suwa Seikosha KK
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Filing: 1971-12-27
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Granted: 1972-09-05
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Expires: 1991-12-27
Abstract
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 structure is such that the force necessary to move the day and date wheels is minimized.
Inventors
- 👤 Toshihiko Oki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:43
CPC Classifications
G; G04; G04B; G04B11/00; G04B19/00; G04B19/24; G04B19/243; G04B19/247; G04B19/253; G04B19/25306; G04B19/25313; G04B19/25326
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
160 words
In a calendar timepiece having day and date wheels wherein it is desired that the pressure of a jumper against wheels be minimized, an improved jumper, comprising a first arm, a spring portion of said first arm, a contact portion at one end of said first arm, a second arm joined to said first arm proximate the other end thereof, a spring portion of said second arm, a contact portion at the end of said second arm other than that end joined to said first arm, a plate against which said jumper rests, and a pin extending perpendicular to said plate, said jumper having a hole therethrough proximate the junction between said arms for receiving said pin, whereby said jumper can pivot about said pin, effectively allowing both arms of said jumper to act in conjunction, thereby reducing the overall stiffness of said jumper and making it possible to construct said jumper more sturdily than would otherwise be the case.
Claim 2
Dependent Claim
160 words
In a calendar timepiece having day and date wheels wherein it is desired that the pressure of a jumper against wheels be minimized, an improved jumper, comprising a first arm, a spring portion of said first arm, a contact portion at one end of said first arm, a second arm joined to said first arm proximate the other end thereof, a spring portion of said second arm, a contact portion at the end of said second arm other than that end joined to said first arm, a plate against which said jumper rests, and a pin extending perpendicular to said plate, said jumper having a hole therethrough proximate the junction between said arms for receiving said pin, whereby said jumper can pivot about said pin, effectively allowing both arms of said jumper to act in conjunction, thereby reducing the overall stiffness of said jumper and making it possible to construct said jumper more sturdily than would otherwise be the case.
Claim 3
Dependent Claim
57 words
In a calendar timepiece having day and date wheels wherein it is desired that the pressure of a jumper against wheels be minimized, 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.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |