US4825332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic driving circuit
Assignee: Seiko Time Creation Inc
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Filing: 1988-02-12
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Granted: 1989-04-25
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Expires: 2008-02-12
Abstract
Abstract An electromagnetic driving circuit for driving a pendulum comprises a coil for detecting and driving a permanent magnet, a comparison circuit for comparing an induction voltage induced in the coil with a reference voltage, a generating circuit for generating driving pulses of a predetermined pulse width in response to outputs of the comparison circuit, and a driving circuit for flowing a driving current through the coil in accordance with the driving pulses. The timing at which the driving pulses are generated and/or the pulse width of the driving pulses are automatically adjusted to optimum values to improve the driving efficiency of the pendulum.
Inventors
- 👤 Hiroshi Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:27
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/02; G04C23/06; G04C3/00; G04C3/02; G04C3/027; G05; G05D; G05D19/00; G05D19/02; H; H02; H02K; H02K33/00; H02K33/02; H02K33/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for comparing an induction voltage induced in said coil with a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width in response to outputs of said comparison circuit; and a driving circuit functioning in accordance with said driving pulse of said output generating circuit for causing a driving current to flow through said coil.
Claim 2
Dependent Claim
77 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for comparing an induction voltage induced in said coil with a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width in response to outputs of said comparison circuit; and a driving circuit functioning in accordance with said driving pulse of said output generating circuit for causing a driving current to flow through said coil.
Claim 3
Dependent Claim
128 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil is in excess of a reference voltage; a pulse generating circuit for generating a driving pulse having a predetermined width in response to the generation of said outputs of said comparison circuit; a driving circuit functioning in accordance with said driving pulse for causing a driving current to flow through said coil; a judgement circuit for judging a level of said induction voltage at a predetermined timing after halting the generation of said driving pulse; and a control circuit for controlling a generation timing and/or a pulse width of said next driving pulse by receiving outputs of said judgement circuit.
Claim 4
Dependent Claim
128 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil is in excess of a reference voltage; a pulse generating circuit for generating a driving pulse having a predetermined width in response to the generation of said outputs of said comparison circuit; a driving circuit functioning in accordance with said driving pulse for causing a driving current to flow through said coil; a judgement circuit for judging a level of said induction voltage at a predetermined timing after halting the generation of said driving pulse; and a control circuit for controlling a generation timing and/or a pulse width of said next driving pulse by receiving outputs of said judgement circuit.
Claim 5
Dependent Claim
89 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil is greater than a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width with a delay of predetermined time from generation of said outputs of said comparison circuit; and a driving circuit functioning in accordance with said driving pulse generated by said output generating circuit for causing a driving current to flow through said coil.
Claim 6
Dependent Claim
89 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil is greater than a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width with a delay of predetermined time from generation of said outputs of said comparison circuit; and a driving circuit functioning in accordance with said driving pulse generated by said output generating circuit for causing a driving current to flow through said coil.
Claim 7
Dependent Claim
122 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil exceeds a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width with a delay of predetermined time from generation of said outputs of said comparison circuit; a driving circuit functioning in accordance with said driving pulse generated from said output generating circuit for causing a driving current to flow through said coil; and a prohibit circuit for prohibiting a supply of said outputs from said comparison circuit to said output generating circuit during a preset period from a predetermined timing after generating said outputs from said comparison circuit.
Claim 8
Dependent Claim
122 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil exceeds a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width with a delay of predetermined time from generation of said outputs of said comparison circuit; a driving circuit functioning in accordance with said driving pulse generated from said output generating circuit for causing a driving current to flow through said coil; and a prohibit circuit for prohibiting a supply of said outputs from said comparison circuit to said output generating circuit during a preset period from a predetermined timing after generating said outputs from said comparison circuit.
Claim 9
Dependent Claim
115 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil exceeds a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width with a delay of predetermined time from generation of said outputs of said comparison circuit; an inhibit circuit for inhibiting the generation of said driving pulse of said output generating circuit when said outputs of said comparison circuit discontinue within said predetermined time; and a driving circuit functioning in accordance with said driving pulse generated from said output generating circuit for causing a driving circuit to flow through said coil.
Claim 10
Dependent Claim
115 words
An electromagnetic driving circuit comprising: a coil for detecting and driving a permanent magnet; a comparison circuit for generating outputs when an induction voltage induced in said coil exceeds a reference voltage; an output generating circuit for generating a driving pulse having a predetermined width with a delay of predetermined time from generation of said outputs of said comparison circuit; an inhibit circuit for inhibiting the generation of said driving pulse of said output generating circuit when said outputs of said comparison circuit discontinue within said predetermined time; and a driving circuit functioning in accordance with said driving pulse generated from said output generating circuit for causing a driving circuit to flow through said coil.
References Cited (Backward Citations)
US4196579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |