US3140428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solenoid firing circuit
Assignee: Individual
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Filing: 1961-08-21
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Granted: 1964-07-07
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Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis H Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:22
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/26; B41J9/44; H; H03; H03K; H03K17/00; H03K17/16; H03K17/18; H03K3/00; H03K3/02; H03K3/53; H03K3/57
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A SOLENOID FIRING CIRCUIT OF THE CHARACTER DESCRIBED COMPRISING A SOLENOID COIL, A STORAGE CAPACITOR, A CHARGING TRANSISTOR, LOW OHMAGE MEANS CONNECTING SAID CAPACITOR AND CHARGING TRANSISTOR IN SERIES WITH VOLTAGE SUPPLY TERMINALS ADAPTED TO BE ENERGIZED BY A DIRECT VOLTAGE, A DISCHARGING TRANSISTOR CONNECTING SAID CAPACITOR ACROSS SAID COIL, A DRIVER TRANSISTOR CONNECTED TO TURN SAID DISCHARGING TRANSISTOR FULLY ON AND TO TURN SAID CHARGING TRANSISTOR OFF AND VICE VERSA, AND MEANS TO TURN SAID DRIVER TRANSISTOR ON AND OFF, WHEREBY SAID CIRCUIT OPERATES EFFICIENTLY WITHOUT INTERFERENCE FROM OTHER SUCH CIRCUITS CONENECTED TO A COMMON POWER SUPPLY.
Claim 2
Dependent Claim
98 words
A SOLENOID FIRING CIRCUIT OF THE CHARACTER DESCRIBED COMPRISING A SOLENOID COIL, A STORAGE CAPACITOR, A CHARGING TRANSISTOR, LOW OHMAGE MEANS CONNECTING SAID CAPACITOR AND CHARGING TRANSISTOR IN SERIES WITH VOLTAGE SUPPLY TERMINALS ADAPTED TO BE ENERGIZED BY A DIRECT VOLTAGE, A DISCHARGING TRANSISTOR CONNECTING SAID CAPACITOR ACROSS SAID COIL, A DRIVER TRANSISTOR CONNECTED TO TURN SAID DISCHARGING TRANSISTOR FULLY ON AND TO TURN SAID CHARGING TRANSISTOR OFF AND VICE VERSA, AND MEANS TO TURN SAID DRIVER TRANSISTOR ON AND OFF, WHEREBY SAID CIRCUIT OPERATES EFFICIENTLY WITHOUT INTERFERENCE FROM OTHER SUCH CIRCUITS CONENECTED TO A COMMON POWER SUPPLY.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |