Patent US3978654A successfully refreshed from Google Patents.
US3978654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motion transformer
Assignee: Suwa Seikosha KK
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Filing: 1975-11-24
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Granted: 1976-09-07
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Expires: 1995-11-24
Abstract
Abstract A rotary motion transformer particularly adapted to provide continuous rotary motion to a driven member in response to an intermittently rotated driving member is provided. The driven member and the driving member are oppositely poled magnetic permeable members disposed proximate to each other to provide a flux field therebetween. The driven rotary member is disposed in a viscous damping reservoir, the viscous damping reservoir effecting smooth and continuous rotation of the driven member.
Inventors
- 👤 Kenichi Koike
- 👤 Yoshikazu Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:57
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/10; H02K49/104; H02K49/108; G; G04; G04B; G04B11/00; G04B11/001; G04B11/005; G04C; G04C3/00; G04C3/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
In an electronic timepiece having a step motor for intermittently stepping a gear train including a plurality of intermittently driven gears, the improvement comprising a first permanent magnet associated with at least one gear, said permanent magnet being intermittently rotated by said gear associated therewith, and clock hand means including a permanent magnet disposed to define a flux field between said gear associated magnet and said clock hand magnet, and viscous damping means surrounding said clock hand magnet to effect a continuous rotation of said clock hand means in response to the intermittent rotation of said gear train.
Claim 2
Dependent Claim
98 words
In an electronic timepiece having a step motor for intermittently stepping a gear train including a plurality of intermittently driven gears, the improvement comprising a first permanent magnet associated with at least one gear, said permanent magnet being intermittently rotated by said gear associated therewith, and clock hand means including a permanent magnet disposed to define a flux field between said gear associated magnet and said clock hand magnet, and viscous damping means surrounding said clock hand magnet to effect a continuous rotation of said clock hand means in response to the intermittent rotation of said gear train.
Claim 3
Dependent Claim
130 words
In an electronic timepiece having a step motor, the improvement comprising step motor means including a rotor and a magnetic permeable rotatable driving member having two opposite polarity poles, said step motor intermittently rotating said magnetic permeable rotatable driving member in response to a stepping of the rotor thereof, and clock hand means including a magnetic permeable rotatable driven member having two opposite polarity poles, said driven member and driving member being positionally disposed to define a flux field therebetween and rotate about the same axis; and a viscous damping means, said driven member portion of said clock hand means being rotatably disposed in said viscous damping means, said driven member and hence said clock hand means being continuously rotated in response to the intermittent rotation of said driving member.
Claim 4
Dependent Claim
130 words
In an electronic timepiece having a step motor, the improvement comprising step motor means including a rotor and a magnetic permeable rotatable driving member having two opposite polarity poles, said step motor intermittently rotating said magnetic permeable rotatable driving member in response to a stepping of the rotor thereof, and clock hand means including a magnetic permeable rotatable driven member having two opposite polarity poles, said driven member and driving member being positionally disposed to define a flux field therebetween and rotate about the same axis; and a viscous damping means, said driven member portion of said clock hand means being rotatably disposed in said viscous damping means, said driven member and hence said clock hand means being continuously rotated in response to the intermittent rotation of said driving member.
Claim 5
Dependent Claim
18 words
An electronic timepiece as claimed in claim 2, wherein said driving member and driven member are permanent magnets.
Claim 6
Dependent Claim
43 words
An electronic timepiece as claimed in claim 2, wherein said clock hand means includes a clock hand disposed without said viscous damping means, whereby said clock hand is continuously rotated in response to intermittent rotations of said driven member by said step motor.
Claim 7
Dependent Claim
22 words
An electronic timepiece as claimed in claim 3, wherein said viscous damping means includes a vessel defining a viscous material reservoir therein.
References Cited (Backward Citations)
US3652884A
Cited
US3783600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |