US3283127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit
Assignee: Basic Products Corp
•
Filing: 1963-12-12
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Granted: 1966-11-01
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 William A Robinson
- 👤 James E Huston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:47
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
IN A CONTROL CIRCUIT FOR PROVIDING IN A MACHINE A PLURALITY OF POWER HEATING LEVELS FROM AN A.C. POWER SOURCE, THE COMBINATION INCLUDING SILICON CONTROLLED RECTIFIER MEANS CONNECTED BETWEEN SAID SOURCE AND ELECTRIC HEATING LOAD MEANS, FIRST SWITCH MEANS, FIRST TIMER CIRCUIT MEANS CONNECTED TO THE GATING MEANS OF SAID SILICON CONTROLLED RECTIFIER MEANS, SAID FIRST TIMER MEANS INCLUDING FIRST UNIJUNCTION TRANSISTOR MEANS BEING ENERGIZED BY SAID FIRST SWITCH MEANS OPERATED BY THE MACHINE BEING CONTROLLED, SAID FIRST TIMER MEANS GATING SAID RECTIFIER MEANS FOR ONE PREDETERMINED TIME OF A HALF CYCLE, SECOND SWITCH MEANS, SECOND TIMER CIRCUIT MEANS INCLUDING SECOND UNIJUNCTION TRANSISTOR MEANS CONNECTED TO THE GATING MEANS OF SAID SILICON CONTROLLED RECTIFIER MEANS GATING SAID RECTIFIER MEANS FOR ANOTHER PREDETERMINED TIME OF A HALF CYCLE TO PROVIDE ANOTHER LEVEL OF POWER TO SAID HEATING LOAD MEANS, SAID SECOND TIMER CIRCUIT MEANS BEING ACTIVATED BY SAID SECOND SWITCH MEANS ACTUATED BY THE MACHINE BEING CONTROLLED, AND THIRD TIMING CIRCUIT MEANS INCLUDING A THIRD UNIJUNCTION TRANSISTOR AND A SHORTING MEANS CONNECTED WITH THE CIRCUIT MEANS FOR SAID FIRST AND SECOND UNIJUNCTION TRANSISTORS FOR DEACTIVATING SAID SILICON CONTROLLED RECTIFIER MEANS AND BOTH SAID FIRST AND SECOND TIMER MEANS.
Claim 2
Dependent Claim
197 words
IN A CONTROL CIRCUIT FOR PROVIDING IN A MACHINE A PLURALITY OF POWER HEATING LEVELS FROM AN A.C. POWER SOURCE, THE COMBINATION INCLUDING SILICON CONTROLLED RECTIFIER MEANS CONNECTED BETWEEN SAID SOURCE AND ELECTRIC HEATING LOAD MEANS, FIRST SWITCH MEANS, FIRST TIMER CIRCUIT MEANS CONNECTED TO THE GATING MEANS OF SAID SILICON CONTROLLED RECTIFIER MEANS, SAID FIRST TIMER MEANS INCLUDING FIRST UNIJUNCTION TRANSISTOR MEANS BEING ENERGIZED BY SAID FIRST SWITCH MEANS OPERATED BY THE MACHINE BEING CONTROLLED, SAID FIRST TIMER MEANS GATING SAID RECTIFIER MEANS FOR ONE PREDETERMINED TIME OF A HALF CYCLE, SECOND SWITCH MEANS, SECOND TIMER CIRCUIT MEANS INCLUDING SECOND UNIJUNCTION TRANSISTOR MEANS CONNECTED TO THE GATING MEANS OF SAID SILICON CONTROLLED RECTIFIER MEANS GATING SAID RECTIFIER MEANS FOR ANOTHER PREDETERMINED TIME OF A HALF CYCLE TO PROVIDE ANOTHER LEVEL OF POWER TO SAID HEATING LOAD MEANS, SAID SECOND TIMER CIRCUIT MEANS BEING ACTIVATED BY SAID SECOND SWITCH MEANS ACTUATED BY THE MACHINE BEING CONTROLLED, AND THIRD TIMING CIRCUIT MEANS INCLUDING A THIRD UNIJUNCTION TRANSISTOR AND A SHORTING MEANS CONNECTED WITH THE CIRCUIT MEANS FOR SAID FIRST AND SECOND UNIJUNCTION TRANSISTORS FOR DEACTIVATING SAID SILICON CONTROLLED RECTIFIER MEANS AND BOTH SAID FIRST AND SECOND TIMER MEANS.
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) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |