Patent US3568017A successfully refreshed from Google Patents.
US3568017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push-pull oscillator for sustaining the oscillations of a resonator
Assignee: Voumard Machines Co SA
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Filing: 1969-08-04
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Granted: 1971-03-02
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Expires: 1989-08-04
Abstract
Abstract An electronic device for sustaining the oscillations of a resonator, especially for a timepiece, characterized by the fact that it comprises two complementary transistors the emitters of which are connected to the terminals of a source of current, the bases of which are both connected to one source of control pulses producing pulses alternatively of one sign and of the other, and the collectors of which are both connected to the element to be controlled, wherefore these transistors are operated alternatively by the pulses, one by the pulses of one sign and the other by the pulses of opposite sign, and so that the resonator thus receives a sustaining pulse at each halfoscillation of its oscillating member.
Inventors
- 👤 Jean Schaad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:27
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/067
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
In a timepiece having a pair of parallel superposed arms of an oscillating balance wheel subject to the action of a hair spring, an electronic device for sustaining the oscillations of a resonator comprising: a pickup winding as a source of control pulses for producing alternating pulses of one sign and of opposite sign; a driving winding connected to the element under control and superpose over the pickup winding; a source of current; a pair of magnets mounted on each arm of the balance-wheel; a capacitor interposed between the pickup and driving windings, the sustaining circuit of the oscillations including first and second complementary transistors of opposite conductivity type having bases connected to the pickup winding and emitters connected to the source of current and collectors connected to the driving winding; and with the transistors being operative alternatingly, one by the pulses of one sign and the other by the pulses of opposite sign enabling the resonator to receive a sustaining pulse at each half-oscillation of the balance wheel.
Claim 2
Dependent Claim
169 words
In a timepiece having a pair of parallel superposed arms of an oscillating balance wheel subject to the action of a hair spring, an electronic device for sustaining the oscillations of a resonator comprising: a pickup winding as a source of control pulses for producing alternating pulses of one sign and of opposite sign; a driving winding connected to the element under control and superpose over the pickup winding; a source of current; a pair of magnets mounted on each arm of the balance-wheel; a capacitor interposed between the pickup and driving windings, the sustaining circuit of the oscillations including first and second complementary transistors of opposite conductivity type having bases connected to the pickup winding and emitters connected to the source of current and collectors connected to the driving winding; and with the transistors being operative alternatingly, one by the pulses of one sign and the other by the pulses of opposite sign enabling the resonator to receive a sustaining pulse at each half-oscillation of the balance wheel.
Claim 3
Dependent Claim
63 words
In the electronic device of a timepiece as set forth in claim 1, characterized by the first transistor being released by the pulses of one sign as the half-oscillations of the balance wheel move in one direction and by the second transistor being released by the pulses of the said one sign as the half-oscillations of the balance wheel move in opposite direction.
Claim 4
Dependent Claim
33 words
In the electronic device of a timepiece as set forth in claim 2, with the application of a driving pulse at each half oscillation of the balance wheel through its position of equilibrium.
Claim 5
Dependent Claim
99 words
In the electronic device in a timepiece as set forth in claim 2, with the balance-wheel making a half-oscillations in one direction for producing in the pickup winding a current of one sign as one of the pairs of magnets passes the coil thereof and a current of higher voltage and opposite sign as both of the pairs of magnets pass the coil thereof and another current of opposite sign as the other of the pairs of magnets pass the coil thereof and with the balance wheel making a return half oscillation in opposite direction producing a reverse current.
Claim 6
Dependent Claim
158 words
In a timepiece having a balance wheel subject to the action of a hair spring, an electronic device for sustaining the oscillations of a resonator comprising: a pickup winding as a source of control pulses for producing alternating pulses of one sign and of opposite sign; a driving winding connected to the element under control and superposed over the pickup winding; a source of current; a pair of magnets mounted on the balance wheel; a capacitor interposed between the pickup and driving windings, the sustaining circuit of the oscillations including first and second complementary transistors of opposite conductivity type having bases connected to the pickup winding and emitters connected to the source of current and collectors connected to the driving winding; and with the transistors being operative alternatingly, one by the pulses of one sign and the other by the pulses of opposite sign enabling the resonator to receive a sustaining pulse at each half-oscillation of the balance-wheel.
Claim 7
Dependent Claim
158 words
In a timepiece having a balance wheel subject to the action of a hair spring, an electronic device for sustaining the oscillations of a resonator comprising: a pickup winding as a source of control pulses for producing alternating pulses of one sign and of opposite sign; a driving winding connected to the element under control and superposed over the pickup winding; a source of current; a pair of magnets mounted on the balance wheel; a capacitor interposed between the pickup and driving windings, the sustaining circuit of the oscillations including first and second complementary transistors of opposite conductivity type having bases connected to the pickup winding and emitters connected to the source of current and collectors connected to the driving winding; and with the transistors being operative alternatingly, one by the pulses of one sign and the other by the pulses of opposite sign enabling the resonator to receive a sustaining pulse at each half-oscillation of the balance-wheel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |