Patent US814653A successfully refreshed from Google Patents.
US3248643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Full-range phase-control a. c. switch
Assignee: General Electric Co
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Filing: 1962-04-25
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Granted: 1966-04-26
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Expires: 1982-04-25
Abstract
No abstract record available.
Inventors
- 👤 Gustaf R Lawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:03
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44; G05F1/445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A PHASE-CONTRL ALTERNATING CURRENT SWITCH COMPRISING: (A) A PAIR OF TERMINALS ADAPTED TO BE CONNECTED TO THE SERIAL COMBINATION OF A LOAD AND AN ALTERNATING CURRENT SOURCE, (B) A CONTROLLABLE RECTIFIER DEVICE CONNECTED BETWEEN SAID PAIR OF TERMINALS, (C) FIRST VARIABLE MEANS CONNECTED TO SAID CONTROLLABLE RECTIFIER DEVICE TO CONTROL THE FIRING ANGLE OF SAID CONTROLLABLE RECTFIER DEVICE ONE-HALF OF THE CYCLE OF THE ALTERNATING CURRENT SOURCE, (D) A RECTIFIER DEVICE OPPOSITELY POLED WITH RESPECT TO SAID CONTROLLABLE RECTIFIER DEVICE, (E) MEANS TO CONNECT SAID RECTIFIER DEVICE BETWEEN SAID PAIR OF TERMINALS WHEN SAID CONTROLLABLE RECTIFIER DEVICE IS CONDUCTIVE DURING SUBSTANTIALLY AN ENTIRE HALF CYCLE OF THE ALTERNATING CURRENT SOURCE, (F) SECOND VARIABLE MEANS TO CONTROL THE FIRING ANGLE OF SAID CONTROLLABLE RECTIFIER DEVICE WHEN SAID RECTIFIER DEVICE IS CONNECTED BETWEEN SAID PAIR OF TERMINALS, AND (G) MEANS TO CONNECT SAID SECOND VARIABLE MEANS TO SAID CONTROLLABLE RECTIFIER DEVICE SUBSTANTIALLY SIMULTANEOUS WITH THE CONNECTION OF SAID RECTIFIER DEVICE BETWEEN SAID PAIR OF TERMINALS.
Claim 2
Dependent Claim
163 words
A PHASE-CONTRL ALTERNATING CURRENT SWITCH COMPRISING: (A) A PAIR OF TERMINALS ADAPTED TO BE CONNECTED TO THE SERIAL COMBINATION OF A LOAD AND AN ALTERNATING CURRENT SOURCE, (B) A CONTROLLABLE RECTIFIER DEVICE CONNECTED BETWEEN SAID PAIR OF TERMINALS, (C) FIRST VARIABLE MEANS CONNECTED TO SAID CONTROLLABLE RECTIFIER DEVICE TO CONTROL THE FIRING ANGLE OF SAID CONTROLLABLE RECTFIER DEVICE ONE-HALF OF THE CYCLE OF THE ALTERNATING CURRENT SOURCE, (D) A RECTIFIER DEVICE OPPOSITELY POLED WITH RESPECT TO SAID CONTROLLABLE RECTIFIER DEVICE, (E) MEANS TO CONNECT SAID RECTIFIER DEVICE BETWEEN SAID PAIR OF TERMINALS WHEN SAID CONTROLLABLE RECTIFIER DEVICE IS CONDUCTIVE DURING SUBSTANTIALLY AN ENTIRE HALF CYCLE OF THE ALTERNATING CURRENT SOURCE, (F) SECOND VARIABLE MEANS TO CONTROL THE FIRING ANGLE OF SAID CONTROLLABLE RECTIFIER DEVICE WHEN SAID RECTIFIER DEVICE IS CONNECTED BETWEEN SAID PAIR OF TERMINALS, AND (G) MEANS TO CONNECT SAID SECOND VARIABLE MEANS TO SAID CONTROLLABLE RECTIFIER DEVICE SUBSTANTIALLY SIMULTANEOUS WITH THE CONNECTION OF SAID RECTIFIER DEVICE BETWEEN SAID PAIR OF TERMINALS.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |