Patent US1717171A successfully refreshed from Google Patents.
US3123757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
gaudet
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:28
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/913; Y10S388/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A DIRECT CURRENT MOTOR CONTROL CIRCUIT, THE COMBINATION INCLUDING MEANS FOR CONVERTING ALTERNATING CURRENT FROM A SOURCE CONNECTED THERETO INTO DIRECT CURRENT HAVING A PULSATION FOR EACH HALF CYCLE OF SAID ALTERNATING CURRENT, SINGLE SOLID STATE SWITCHING DEVICE FOR CONNECTING A DIRECT CURRENT MOTOR TO THE DIRECT CURRENT OUTPUT OF SAID CONVERTING MEANS, AND MEANS FOR CONTROLLING SAID DEVICE, SAID CONTROLLING MEANS BEING RESPONSIVE TO SAID PULSATIONS OF SAID DIRECT CURRENT CONNECTED THERETO TO ACTUATE SAID DEVICE INTO CONDUCTION FOR A PREDETERMINED PORTION OF EACH HALF CYCLE OF SAID ALTERNATING CURRENT, WHEREBY SAID DIRECT CURRENT MOTOR IS ENERGIZED DURING SAID PREDETERMINED PORTIONS.
Claim 2
Dependent Claim
103 words
IN A DIRECT CURRENT MOTOR CONTROL CIRCUIT, THE COMBINATION INCLUDING MEANS FOR CONVERTING ALTERNATING CURRENT FROM A SOURCE CONNECTED THERETO INTO DIRECT CURRENT HAVING A PULSATION FOR EACH HALF CYCLE OF SAID ALTERNATING CURRENT, SINGLE SOLID STATE SWITCHING DEVICE FOR CONNECTING A DIRECT CURRENT MOTOR TO THE DIRECT CURRENT OUTPUT OF SAID CONVERTING MEANS, AND MEANS FOR CONTROLLING SAID DEVICE, SAID CONTROLLING MEANS BEING RESPONSIVE TO SAID PULSATIONS OF SAID DIRECT CURRENT CONNECTED THERETO TO ACTUATE SAID DEVICE INTO CONDUCTION FOR A PREDETERMINED PORTION OF EACH HALF CYCLE OF SAID ALTERNATING CURRENT, WHEREBY SAID DIRECT CURRENT MOTOR IS ENERGIZED DURING SAID PREDETERMINED PORTIONS.
References Cited (Backward Citations)
US2977523A
Cited
US3064174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |