US3742697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving arrangement for an electric watch
Assignee: Suwa Seikosha KK
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Filing: 1971-07-27
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Granted: 1973-07-03
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Expires: 1991-07-27
Abstract
Abstract An electric watch including an electro-mechanical converter driven by a signal produced by dividing a series of divider means, a relatively high frequency oscillating time standard signal. The output of the last of said divider means is combined in a wave shaping logic circuit with the output of an intermediate stage of said divider means for producing a pulse signal for application to an electro-mechanical converter, the width of the pulses of which is determined by the period of said intermediate stage output.
Inventors
- 👤 T Hama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
An electric watch comprising a crystal oscillator oscillating at a relatively high frequency; a DC source having a pair of terminals; a stepped motor; and circuit means for applying an alternating driving signal to said stepped motor derived from the output of said crystal oscillator including frequency divider and wave shaping circuit means formed from MOS transistors and driving circuit means for applying said driving signal to said stepped motor in response to the signals from said wave shaping circuit means, said driving circuit means including two pairs of switching means, each of said pairs being connected in series with said stepped motor between said DC source terminals, said wave shaping circuit means being directly coupled to said switching means without capacitors.
Claim 2
Dependent Claim
122 words
An electric watch comprising a crystal oscillator oscillating at a relatively high frequency; a DC source having a pair of terminals; a stepped motor; and circuit means for applying an alternating driving signal to said stepped motor derived from the output of said crystal oscillator including frequency divider and wave shaping circuit means formed from MOS transistors and driving circuit means for applying said driving signal to said stepped motor in response to the signals from said wave shaping circuit means, said driving circuit means including two pairs of switching means, each of said pairs being connected in series with said stepped motor between said DC source terminals, said wave shaping circuit means being directly coupled to said switching means without capacitors.
Claim 3
Dependent Claim
103 words
An electric watch comprising an electro-mechanical converter; means for producing a relatively high frequency oscillating time standard signal; a plurality of divider means coupled to said time standard means for producing at its output stage a signal of relatively low frequency; and wave form shaping circuit means coupled to said divider means for receiving the output signal of said last divider means stage and of an intermediate divider means stage, and coupled to said electro-mechanical converter for applying an alternating pulse signal thereto of a pulse width representative of the pulse width of the signal from said intermediate stage of said divider means.
Claim 4
Dependent Claim
103 words
An electric watch comprising an electro-mechanical converter; means for producing a relatively high frequency oscillating time standard signal; a plurality of divider means coupled to said time standard means for producing at its output stage a signal of relatively low frequency; and wave form shaping circuit means coupled to said divider means for receiving the output signal of said last divider means stage and of an intermediate divider means stage, and coupled to said electro-mechanical converter for applying an alternating pulse signal thereto of a pulse width representative of the pulse width of the signal from said intermediate stage of said divider means.
Claim 5
Dependent Claim
22 words
An electric watch as recited in claim 2, wherein said wave form shaping circuit is formed from integrated circuits utilizing MOS transistors.
Claim 6
Dependent Claim
44 words
An electric watch as recited in claim 2, wherein said wave shaping circuit means is adapted to delay the output signal of the last stage of said divider means by the pulse width of the signal from said intermediate stage of said divider means.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |