Patent US3813873A successfully refreshed from Google Patents.
US3813873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching device for electronic watch
Assignee: Seiko Instruments Inc
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Filing: 1973-03-20
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Granted: 1974-06-04
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Expires: 1993-03-20
Abstract
Abstract An improved switching device for an electronic watch is used for starting and stopping said watch. The device includes means for avoiding stress on the drive train and motor while setting the hands.
Inventors
- 👤 Y Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:46
CPC Classifications
G; G04; G04C; G04C9/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
165 words
In an electronic watch including electrical drive means, switch means externally manipulatable between on and off positions for turning said electrical drive means on or off, a drive train powered by said drive means, minute hand and hour hand, a wheel operatively connecting said drive train said minute hand and said hour hand, and frictional clutch means between said wheel and said minute hand, the improvement comprising a disc mounted for rotation with said wheel and an arm having first and second ends, said arm being operatively connected with said switch means to make sufficiently firm contact with said disc to prevent rotation thereof when said switch means is in off position, the halting of said drive means and of said drive train by said disc and wheel and said frictional clutch means making it possible to adjust the position of said hour and minute hands without stressing said drive means and the part of said drive train intermediate said drive means and said wheel.
Claim 2
Dependent Claim
165 words
In an electronic watch including electrical drive means, switch means externally manipulatable between on and off positions for turning said electrical drive means on or off, a drive train powered by said drive means, minute hand and hour hand, a wheel operatively connecting said drive train said minute hand and said hour hand, and frictional clutch means between said wheel and said minute hand, the improvement comprising a disc mounted for rotation with said wheel and an arm having first and second ends, said arm being operatively connected with said switch means to make sufficiently firm contact with said disc to prevent rotation thereof when said switch means is in off position, the halting of said drive means and of said drive train by said disc and wheel and said frictional clutch means making it possible to adjust the position of said hour and minute hands without stressing said drive means and the part of said drive train intermediate said drive means and said wheel.
Claim 3
Dependent Claim
27 words
The improvement as defined in claim 1 wherein said arm has a cusp thereon so disposed that said arm makes contact with said disk at said cusp.
Claim 4
Dependent Claim
17 words
The improvement as defined in claim 1 further comprising spring means urging said arm toward said disk.
Claim 5
Dependent Claim
19 words
The improvement as defined in claim 2 wherein said disk is sufficiently flexible to be indented by said cusp.
Claim 6
Dependent Claim
16 words
The improvement as defined in claim 3 wherein said disk is of a slightly flexible rubber.
Claim 7
Dependent Claim
21 words
The improvement as defined in claim 3 wherein said disk is coated with a material having a high coefficient of friction.
Claim 8
Dependent Claim
89 words
The improvement as defined in claim 1 wherein said arm has first and second ends and said switch means includes spring means engaging said arm, a stem movable between inward and outward positions from the exterior of said watch, said inward and outward positions corresponding to on and off switch positions, said stem in said inward position engaging said arm and holding same away from said disc, and in said outward position permitting said arm to move and remain in firm contact with said disc thereby holding same stationary.
Claim 9
Dependent Claim
98 words
The improvement as defined in claim 7 further comprising an electrical switch pin adjacent said switch means, said switch means including a pivoted switch lever having top and base ends, said base end being linked to said second end of said arm, the relative positions of said arm and switch lever being such that said arm when disengaged from said disc holds said top end of said switch means against said switch pin and activates said drive means and when pressed against said disc holds said top end away from said switch pin thereby deactivating said drive means.
Claim 10
Dependent Claim
97 words
The improvement as defined in claim 8 wherein said arm has mOunted thereon near its second end a transmitting pin, and said base end is apertured for reception of said transmitting pin, said arm and said lever being so positioned relatively to each other that movement of said arm from disengagement to engagement with said disc is transmitted through said transmitting pin to the walls of said aperture causing said top end of said lever to break contact with said contact pin and vice versa when said arm is moved from engagement to disengagement with said disc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |