US3280341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent switching circuit
Assignee: Henry W W Co
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Filing: 1963-03-11
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Granted: 1966-10-18
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Expires: 1983-03-11
Abstract
No abstract record available.
Inventors
- 👤 Vall Wilbur E Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:59
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/601
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
SWITCHIN SYSTEM FOR APPLYING POWER FROM A SOURCE TO A LOAD COMPRISING A FIRST TRANSFORMER HAVING A PRIMARY AND CENTER TAPPED SECONDARY WINDING, MEANS CONNECTING SAID SOURCE TO SAID PRIMARY WINDING, A SECOND TRANSFORMER HAVING A CENTER TAPPED PRIMARY AND A SECONDARY WINDING MEANS CONNECTING SAID LOAD TO SAID SECOND TRANSFORMER SECONDARY WINDING, A FIRST DIODE CONNECTED BETWEEN ONE END OF SAID FIRST TRANSFORMER SECONDARY WINDING AND ONE ONE OF SAID SECOND TRANSFORMER PRIMARY WINDING, A SECOND DIODE CONNECTED BETWEEN THE OTHER END OF SAID FIRST TRANSFORMER SECONDARY WINDING AND THE OTHER END OF SAID SECOND TRANSFORMER PRIMARY WINDING, SAID FIRST AND SECOND DIODES BEING IDENTICALLY POLED RELATIVE TO SAID TRANSFORMER WINDING AND EACH OTHER, A TRANSISTOR A COLLECTOR, EMITTER AND BASE ELECTRODE, MEANS CONNECTING SAID COLLECTOR TO SAID SECOND TRANSFORMER PRIMARY WINDINGS CENTER TAP, MEANS CONNECTING SAID IMITTER TO SAID FIRST TRANSFORMER
Claim 2
Dependent Claim
143 words
SWITCHIN SYSTEM FOR APPLYING POWER FROM A SOURCE TO A LOAD COMPRISING A FIRST TRANSFORMER HAVING A PRIMARY AND CENTER TAPPED SECONDARY WINDING, MEANS CONNECTING SAID SOURCE TO SAID PRIMARY WINDING, A SECOND TRANSFORMER HAVING A CENTER TAPPED PRIMARY AND A SECONDARY WINDING MEANS CONNECTING SAID LOAD TO SAID SECOND TRANSFORMER SECONDARY WINDING, A FIRST DIODE CONNECTED BETWEEN ONE END OF SAID FIRST TRANSFORMER SECONDARY WINDING AND ONE ONE OF SAID SECOND TRANSFORMER PRIMARY WINDING, A SECOND DIODE CONNECTED BETWEEN THE OTHER END OF SAID FIRST TRANSFORMER SECONDARY WINDING AND THE OTHER END OF SAID SECOND TRANSFORMER PRIMARY WINDING, SAID FIRST AND SECOND DIODES BEING IDENTICALLY POLED RELATIVE TO SAID TRANSFORMER WINDING AND EACH OTHER, A TRANSISTOR A COLLECTOR, EMITTER AND BASE ELECTRODE, MEANS CONNECTING SAID COLLECTOR TO SAID SECOND TRANSFORMER PRIMARY WINDINGS CENTER TAP, MEANS CONNECTING SAID IMITTER TO SAID FIRST TRANSFORMER
References Cited (Backward Citations)
US3165640A
Cited
US3201613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |