US3265907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimmers for discharge lamps
Assignee: Toshiba Corp
•
Filing: 1963-06-07
•
Granted: 1966-08-09
•
Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Kurata Mamoru
- 👤 Ichikawa Atsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:32
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; H05B41/3921; H05B41/3924; Y; Y10; Y10S; Y10S315/00; Y10S315/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A LIGHTING CIRCUIT INCLUDING A CONDUCTION CONTROLLING DEVICE CONNECTED IN ONE OF THE A.C. POWER LINES FOR SUPPLYING DISCHARGE LAMPS COMPRISING IN COMBINATION A DIMMER COMPRISING A RECTIFIER BRIDGE CIRCUIT HAVING TWO PAIRS OF OPPOSED APICES; CONNECTIONS FROM THE A.C. POWER LINES RESPECTIVELY TO ONE PAIR OF OPPOSED APICES; OUTPUT CONNECTIONS RESPECTIVELY FROM THE OTHER PAIR OF OPPOSED APICES; A SERIES CIRCUIT CONNECTED BETWEEN SAID OUTPUT CONNECTIONS; A SILICON-CONTROLLED RECTIFIER HAVING A GATING ELECTRODE AND A PRIMARY WINDING OF A TRANSFORMER CONNECTED IN SERIES TO COMPRISE SAID SERIES CIRCUIT; A VARIABLE PHASE PULSE OSCILLATOR CONNECTED TO THE GATE OF SAID SILICON RECTIFIER FOR APPLYING PULSES THERETO; SAID TRANSFORMER HAVING AT LEAST ONE SECONDARY WINDING; AND A CIRCUIT FOR SUPPLYING OUTPUT VOLTAGE FROM SAID SECONDARY WINDING TO SAID CONDUCTION CONTROLLING DEVICE.
Claim 2
Dependent Claim
131 words
IN A LIGHTING CIRCUIT INCLUDING A CONDUCTION CONTROLLING DEVICE CONNECTED IN ONE OF THE A.C. POWER LINES FOR SUPPLYING DISCHARGE LAMPS COMPRISING IN COMBINATION A DIMMER COMPRISING A RECTIFIER BRIDGE CIRCUIT HAVING TWO PAIRS OF OPPOSED APICES; CONNECTIONS FROM THE A.C. POWER LINES RESPECTIVELY TO ONE PAIR OF OPPOSED APICES; OUTPUT CONNECTIONS RESPECTIVELY FROM THE OTHER PAIR OF OPPOSED APICES; A SERIES CIRCUIT CONNECTED BETWEEN SAID OUTPUT CONNECTIONS; A SILICON-CONTROLLED RECTIFIER HAVING A GATING ELECTRODE AND A PRIMARY WINDING OF A TRANSFORMER CONNECTED IN SERIES TO COMPRISE SAID SERIES CIRCUIT; A VARIABLE PHASE PULSE OSCILLATOR CONNECTED TO THE GATE OF SAID SILICON RECTIFIER FOR APPLYING PULSES THERETO; SAID TRANSFORMER HAVING AT LEAST ONE SECONDARY WINDING; AND A CIRCUIT FOR SUPPLYING OUTPUT VOLTAGE FROM SAID SECONDARY WINDING TO SAID CONDUCTION CONTROLLING DEVICE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |