US3593200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching arrangement for time keeping equipment
Assignee: Individual
•
Filing: 1969-02-18
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Granted: 1971-07-13
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Expires: 1989-02-18
Abstract
Abstract A self-exciting electronic circuit for driving the mechanical rate element of a time-keeping device including means to vary the width of the drive pulse to compensate for amplitude differences caused by temperature or voltage changes.
Inventors
- 👤 Robert W Reich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:54
CPC Classifications
G; G04; G04B; G04B17/00; G04B17/20; G04B17/22; G04C; G04C3/00; G04C3/04; G04C3/06; G04C3/065; G04C3/067; G04C3/068; G04C3/069; G04C3/08; G04C3/10; G04C3/108
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
A self-exciting electronic circuit for timekeeping equipment adapted for magnetic interaction with a magnet means to thereby physically drive said equipment, comprising: a. positive and negative terminals adapted to supply DC power, b. a first and second coils adapted to be coupled by said magnet means, c. a first and second transistor of the same conductivity type, said first Transistor being intercoupled in cascade through said first coil with said second transistor connected through said second coil to one of said terminals, d. a feedback link consisting of a first capacitor connected between the output of said second transistor and the base of said first transistor, e. a first resistor connected between the base of said first transistor and the other of said terminals, f. means for connecting the input of said first transistor to the other of said terminals, g. means for connecting the input of said second transistor to the other of said terminals, and h. a second capacitor connected between the input and the base of said first transistor.
Claim 2
Dependent Claim
172 words
A self-exciting electronic circuit for timekeeping equipment adapted for magnetic interaction with a magnet means to thereby physically drive said equipment, comprising: a. positive and negative terminals adapted to supply DC power, b. a first and second coils adapted to be coupled by said magnet means, c. a first and second transistor of the same conductivity type, said first Transistor being intercoupled in cascade through said first coil with said second transistor connected through said second coil to one of said terminals, d. a feedback link consisting of a first capacitor connected between the output of said second transistor and the base of said first transistor, e. a first resistor connected between the base of said first transistor and the other of said terminals, f. means for connecting the input of said first transistor to the other of said terminals, g. means for connecting the input of said second transistor to the other of said terminals, and h. a second capacitor connected between the input and the base of said first transistor.
Claim 3
Dependent Claim
30 words
A circuit according to claim 1, wherein a point between the first coil and the first transistor is connected through a second resistor to the base of the first transistor.
Claim 4
Dependent Claim
25 words
A circuit according to claim 2, wherein the feedback link and the thus series connected second coil are bridged by at least two silicon diodes.
References Cited (Backward Citations)
US2895095A
Cited
US3336537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |