US3293523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Five layer diode counter e. m. f. speed control system
Assignee: Hunt Electronics Co
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Filing: 1963-08-05
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Granted: 1966-12-20
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Expires: 1983-08-05
Abstract
No abstract record available.
Inventors
- 👤 Jearld L Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:30
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/10; H02P25/14; H02P25/145; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917; Y10S388/923; Y10S388/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A MOTOR CONTROL THAT COMPRISES: (A) A SYMMETRICAL FIVE LAYER SEMICONDUCTOR DEVICE CAPABLE OF SWITCHING FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE RESPONSIVE TO THE PRESENCE OF A TRIGGERING VOLTAGE OF PREDERERMINED CHARACTER AND RETURNING TO THE HIGH IMPEDANCE STATE WHEN THE CURRENT THROUGH SAID DEVICE IS REDUCED BELOW A PREDETERMINED VALUE; (B) MEANS FOR CONNECTING THE ARMATURE WINDING OF A MOTOR TO BE CONTROLLED IN SERIES WITH SAID DIODE MEANS; (C) MEANS FOR PRODUCING SAID TRIGGERING VOLTAGE RESPONSIVE TO THE PRESENCE OF A CONTRL SIGNAL AND COUPLING SAID TRIGGERING VOLTAGE TO SAID DIODE MEANS; (D) MEANS FOR PRODUCING SAID CONTROL SIGNAL; AND (E) MEANS TO VARY THE TIME RELATIONSHIP BETWEEN THE BEGINNING OF A HALF CYCLE OF ALTERNATING CURRENT SUPPLY VOLTAGE AND SAID CONTROL SIGNAL AS A FUNCTION OF THE EFFECTIVE VOLTAGES ACROSS SAID ARMATURE WINDING.
Claim 2
Dependent Claim
141 words
A MOTOR CONTROL THAT COMPRISES: (A) A SYMMETRICAL FIVE LAYER SEMICONDUCTOR DEVICE CAPABLE OF SWITCHING FROM A NORMALLY HIGH IMPEDANCE STATE TO A LOW IMPEDANCE STATE RESPONSIVE TO THE PRESENCE OF A TRIGGERING VOLTAGE OF PREDERERMINED CHARACTER AND RETURNING TO THE HIGH IMPEDANCE STATE WHEN THE CURRENT THROUGH SAID DEVICE IS REDUCED BELOW A PREDETERMINED VALUE; (B) MEANS FOR CONNECTING THE ARMATURE WINDING OF A MOTOR TO BE CONTROLLED IN SERIES WITH SAID DIODE MEANS; (C) MEANS FOR PRODUCING SAID TRIGGERING VOLTAGE RESPONSIVE TO THE PRESENCE OF A CONTRL SIGNAL AND COUPLING SAID TRIGGERING VOLTAGE TO SAID DIODE MEANS; (D) MEANS FOR PRODUCING SAID CONTROL SIGNAL; AND (E) MEANS TO VARY THE TIME RELATIONSHIP BETWEEN THE BEGINNING OF A HALF CYCLE OF ALTERNATING CURRENT SUPPLY VOLTAGE AND SAID CONTROL SIGNAL AS A FUNCTION OF THE EFFECTIVE VOLTAGES ACROSS SAID ARMATURE WINDING.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |