US3244964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier systems
Assignee: Cutler Hammer Inc
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Filing: 1962-02-08
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Granted: 1966-04-05
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Expires: 1982-02-08
Abstract
No abstract record available.
Inventors
- 👤 Donald J Greening
- 👤 Stanley O Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
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
191 words
IN AN ELECTRICAL AMPLIFIER SYSTEM FOR CONTROLLING ELECTRICAL ENERGIZATION OF A LOAD: (A) AN ELECTRICAL POWER SUPPLY SOURCE; (B) GATING-TYPE POWER CONTROLLING MEANS CONNECTED TO SAID SOURCE AND HAVING A NORMAL FORWARD BLOCKING STATE WHEREIN SUBSTANTIALLY NO CURRENT FLOWS THERETHROUGH FROM SAID SOURCE AND BEING RESPONSIVE TO FIRING VOLTAGE TO SWITCH TO A CONDUCTIVE STATE TO ALLOW CURRENT FLOW THERETHROUGH WHEN A FORWARD SUPPLY VOLTAGE IS BEING APPLIED THERETO; (C) MEANS EFFECTIVE WHEN OPERATED FOR APPLYING FIRING VOLTAGE TO SAID POWER CONTROLLING MEANS TO SWITCH THE LATTER FROM SAID FORWARD BLOCKING STATE TO SAID CONDUCTIVE STATE; (D) AND MEANS FOR OPERATING SAID FIRING VOLTAGE APPLYING MEANS, COMPRISING MEANS RESPONSIVE TO APPLICATION OF SUPPLY VOLTAGE TO SAID POWER CONTROLLING MEANS WHILE THE LATTER IS IN SAID FORWARD BLOCKING STATE FOR DEVELOPING A CONTROL VOLTAGE PROPORTIONAL TO THE INTEGRAL RELATIVE TO TIME OF THE FORWARD VOLTAGE APPEARING ACROSS SAID POWER CONTROLLING MEANS REGARDLESS OF ITS WAVE SHAPE AND MEANS FOR APPLYING SAID CONTROL VOLTAGE TO OPERATE SAID FIRING VOLTAGE APPLYING MEANS A PREDETERMINED TIME INTERVAL AFTER APPLICATION OF SAID SUPPLY VOLTAGE THERETO WHEREBY TO SWITCH SAID POWER CONTROLLING MEANS TO SAID CONDUCTIVE STATE.
Claim 2
Dependent Claim
191 words
IN AN ELECTRICAL AMPLIFIER SYSTEM FOR CONTROLLING ELECTRICAL ENERGIZATION OF A LOAD: (A) AN ELECTRICAL POWER SUPPLY SOURCE; (B) GATING-TYPE POWER CONTROLLING MEANS CONNECTED TO SAID SOURCE AND HAVING A NORMAL FORWARD BLOCKING STATE WHEREIN SUBSTANTIALLY NO CURRENT FLOWS THERETHROUGH FROM SAID SOURCE AND BEING RESPONSIVE TO FIRING VOLTAGE TO SWITCH TO A CONDUCTIVE STATE TO ALLOW CURRENT FLOW THERETHROUGH WHEN A FORWARD SUPPLY VOLTAGE IS BEING APPLIED THERETO; (C) MEANS EFFECTIVE WHEN OPERATED FOR APPLYING FIRING VOLTAGE TO SAID POWER CONTROLLING MEANS TO SWITCH THE LATTER FROM SAID FORWARD BLOCKING STATE TO SAID CONDUCTIVE STATE; (D) AND MEANS FOR OPERATING SAID FIRING VOLTAGE APPLYING MEANS, COMPRISING MEANS RESPONSIVE TO APPLICATION OF SUPPLY VOLTAGE TO SAID POWER CONTROLLING MEANS WHILE THE LATTER IS IN SAID FORWARD BLOCKING STATE FOR DEVELOPING A CONTROL VOLTAGE PROPORTIONAL TO THE INTEGRAL RELATIVE TO TIME OF THE FORWARD VOLTAGE APPEARING ACROSS SAID POWER CONTROLLING MEANS REGARDLESS OF ITS WAVE SHAPE AND MEANS FOR APPLYING SAID CONTROL VOLTAGE TO OPERATE SAID FIRING VOLTAGE APPLYING MEANS A PREDETERMINED TIME INTERVAL AFTER APPLICATION OF SAID SUPPLY VOLTAGE THERETO WHEREBY TO SWITCH SAID POWER CONTROLLING MEANS TO SAID CONDUCTIVE STATE.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |