US3136958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surge voltage protective circuit for transistor oscillators
Assignee: Globe Industries Inc
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Filing: 1961-10-23
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Granted: 1964-06-09
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Desmond F Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:04
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5383; H02M7/53846; H02M7/53862; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/122; H02H7/1222; H02M1/00; H02M1/32; H02M7/538; H02M7/53803; H02M7/53806; H02M7/53832; H02M7/53835; H03; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1231; H03B5/1296
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A SURGE PROTECTION CIRCUIT FOR A SOLID STATE OSCILLATOR OF THE SERIES REGULATOR TYPE INCLUDING A PAIR OF PUSH-PULL SWITCHING TRANSISTORS IN COMMON EMITTER CONFIGURATION, AN OUTPUT TRANSFORMER AND A BASE TRANSFORMER HAVING A LOADING WINDING, A PRIMARY WINDING AND A SECONDARY WINDING; SAID CIRCUIT BEING CONNECTED BETWEEN THE COMMON EMITTERS OF SAID TRANSISTORS AND THE PRIMARY OF SAID OUTPUT TRANSFORMER, AND COMPRISING A POWER SOURCE AND A THIRD TRANSISTOR HAVING ITS EMITTER-COLLECTOR PATH IN SERIES WITH SAID POWER SOURCE, BIASING MEANS FOR THE BASE OF SAID THIRD TRANSISTOR, MEANS FOR CLAMPING SAID LATTER BASE BIAS, AND MEANS CONTROLLED BY SAID THIRD TRANSISTOR FOR DETERMINING THE LOADING OF SAID LOADING WINDING OF SAID BASE TRANSFORMER, WHEREBY WHEN A SURGE VOLTAGE APPEARS AT SAID POWER SOURCE SAID LAST NAMED MEANS SERVES TO REDUCE THE DRIVE TO SAID SWITCHING TRANSISTORS.
Claim 2
Dependent Claim
138 words
A SURGE PROTECTION CIRCUIT FOR A SOLID STATE OSCILLATOR OF THE SERIES REGULATOR TYPE INCLUDING A PAIR OF PUSH-PULL SWITCHING TRANSISTORS IN COMMON EMITTER CONFIGURATION, AN OUTPUT TRANSFORMER AND A BASE TRANSFORMER HAVING A LOADING WINDING, A PRIMARY WINDING AND A SECONDARY WINDING; SAID CIRCUIT BEING CONNECTED BETWEEN THE COMMON EMITTERS OF SAID TRANSISTORS AND THE PRIMARY OF SAID OUTPUT TRANSFORMER, AND COMPRISING A POWER SOURCE AND A THIRD TRANSISTOR HAVING ITS EMITTER-COLLECTOR PATH IN SERIES WITH SAID POWER SOURCE, BIASING MEANS FOR THE BASE OF SAID THIRD TRANSISTOR, MEANS FOR CLAMPING SAID LATTER BASE BIAS, AND MEANS CONTROLLED BY SAID THIRD TRANSISTOR FOR DETERMINING THE LOADING OF SAID LOADING WINDING OF SAID BASE TRANSFORMER, WHEREBY WHEN A SURGE VOLTAGE APPEARS AT SAID POWER SOURCE SAID LAST NAMED MEANS SERVES TO REDUCE THE DRIVE TO SAID SWITCHING TRANSISTORS.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |