Patent US3911337A successfully refreshed from Google Patents.
US3911337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving and stabilizing circuit for an electro-mechanical oscillator
Assignee: Diehl Verwaltungs Stiftung
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Filing: 1975-01-23
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Granted: 1975-10-07
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Expires: 1995-01-23
Abstract
Abstract A driving and stabilizing circuit for a single coil electromechanical oscillator especially for the rate regulator of a time-piece. The single oscillator drive coil is connected between the terminals of a d.c. supply voltage in series relation to the collector-emitter electrodes of an operating transistor which is operatively switched between a conductive and nonconductive condition by a control transistor. A storage capacitor preceding the control input terminal of the control transistor is operatively connected to be loaded by a regulating circuit responding to voltage induced in the coil. The regulating circuit includes a regulating transistor having a base electrode connected to receive a bias voltage from a voltage divider between the terminals of the supply voltage, and having an emitter electrode operatively connected to the coil. The regulating circuit is also provided with an additional regulating means having a control input operatively connected to the coil and having a controlled output connected to the storage capacitor, the regulating transistor and the regulating means thereby responding variably to voltage conditions occurring in the circuit and tending to stabilize the oscillations of the oscillator in amplitude and frequency. In one embodiment, the additional regulating means comprises a further regulating transistor having a base electrode connected to the coil by way of a series dropping resistor and having collector-emitter electrodes connected in series relation to the storage capacitor between the terminals of the supply. In another embodiment, the additional regulating means comprises a further regulating transistor having a base electrode connected to the coil by way of an RC biasing circuit and being connected to cut off the control transistor in the conductive state of the further regulating transistor.
Inventors
- 👤 Erich Gerum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/067; G04C3/068
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
185 words
A driving and stabilizing circuit for a single coil electromechanical oscillator especially for the rate regulator of a time-piece, the single coil being connected between the terminals of a d.c. supply voltage in series relation to the collector-emitter electrodes of an operating transistor, the operating transistor being operatively switched between a conductive and nonconductive condition by a control transistor, said circuit including a storage capacitor preceding the control input terminal of the control transistor, said capacitor being operatively connected to be loaded by a regulating circuit responding to voltage induced in the coil, the regulating circuit comprising a regulating transistor having a base electrode connected to receive a bias voltage from a voltage divider between the terminals of the supply voltage and having an emitter electrode operatively connected to the coil, and an additional regulating means having a control input operatively connected to the coil and having a controlled output connected to the storage capacitor, the regulating transitor and the regulating means thereby responding variably to voltage conditions occurring in the circuit and tending to stabilize the oscillations of the oscillator in amplitude and frequency.
Claim 2
Dependent Claim
185 words
A driving and stabilizing circuit for a single coil electromechanical oscillator especially for the rate regulator of a time-piece, the single coil being connected between the terminals of a d.c. supply voltage in series relation to the collector-emitter electrodes of an operating transistor, the operating transistor being operatively switched between a conductive and nonconductive condition by a control transistor, said circuit including a storage capacitor preceding the control input terminal of the control transistor, said capacitor being operatively connected to be loaded by a regulating circuit responding to voltage induced in the coil, the regulating circuit comprising a regulating transistor having a base electrode connected to receive a bias voltage from a voltage divider between the terminals of the supply voltage and having an emitter electrode operatively connected to the coil, and an additional regulating means having a control input operatively connected to the coil and having a controlled output connected to the storage capacitor, the regulating transitor and the regulating means thereby responding variably to voltage conditions occurring in the circuit and tending to stabilize the oscillations of the oscillator in amplitude and frequency.
Claim 3
Dependent Claim
51 words
The circuit of claim 1 wherein the voltage divider comprises a plurality of ohmic resistors connected to the supply voltage such that the regulating transistor is less conductive in dependence on the voltage induced in the coil in response to a drop in the supply voltage connected to the voltage divider.
Claim 4
Dependent Claim
30 words
The circuit of claim 2 wherein the storage capacitor, the collector-emitter electrodes of the regulating transistor and the coil are connected in series between the terminals of the voltage supply.
Claim 5
Dependent Claim
16 words
The circuit of claim 3 including a discharge resistor connected in parallel to the storage capacitor.
Claim 6
Dependent Claim
77 words
The circuit of claim 4 wherein said discharge resistor is connected with first and second resistors as part of a further voltage divider, said further voltage divider supplying a bias voltage to the control transistor, said first resistor of the voltage divider being connected between the base electrode of the control transistor and the storage capacitor and said second resistor of said voltage divider being connected between the base electrode of the control transistor and the coil.
Claim 7
Dependent Claim
25 words
The circuit of claim 5 wherein said regulating transistor is biased to operate in the linear range of the characteristic curve in its conductive state.
Claim 8
Dependent Claim
50 words
The circuit of claim 6 wherein said additional regulating means comprises a further regulating transistor having a base electrode connected to the coil by way of a series dropping resistor and having collector-emitter electrodes connected in series in relation to the storage capacitor between the terminals of the supply voltage.
Claim 9
Dependent Claim
26 words
The circuit of claim 7 wherein said further regulating transistor is biased to operate in the linear range of the characteristic curve in its conductive state.
Claim 10
Dependent Claim
51 words
The circuit of claim 6 wherein said additional regulating means comprises a further regulating transistor having a base electrode connected by way of an RC biasing circuit to the coil, said further regulating transistor being connected to cut off said control transistor in the conductive state of said further regulating transistor.
Claim 11
Dependent Claim
52 words
The circuit of claim 1 wherein said additional regulating means comprises a further regulating transistor having a base electrode connected by way of a series connected current limiting resistor to the coil and having collector-emitter electrodes connected in series in relation to the storage capacitor between the terminals of the supply voltage.
Claim 12
Dependent Claim
26 words
The circuit of claim 10 wherein said further regulating transistor is biased to operate in the linear range of the characteristic curve in its conductive state.
Claim 13
Dependent Claim
87 words
The circuit of claim 10 including a discharge resistor connected in parallel to said storage capacitor, said discharge resistor being connected with first and second resistors as part of a further voltage divider, said further voltage divider supplying a bias voltage to the control transistor, said first resistor of the voltage divider being connected between the base electrode of the control transistor and the storage capacitor and said second resistor of said voltage divider being connected between the base electrode of the control transistor and the coil.
Claim 14
Dependent Claim
51 words
The circuit of claim 10 wherein the voltage divider comprises a plurality of ohmic resistors connected to the supply voltage such that the regulating transistor is less conductive in dependence on the voltage induced in the coil in response to a drop in the supply voltage connected to the voltage divider.
Claim 15
Dependent Claim
51 words
The circuit of claim 1 wherein said addition regulating means comprises a further regulating transistor having a base electrode connected by way of an RC biasing circuit to the coil, said further regulating transistor being connected to cut off said control Transistor in the conductive state of said further regulating transistor.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |