US3344332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current running speed control in which a space discharge device is included in the armature circuit
Assignee: Seco Electronics Corp
•
Filing: 1965-01-14
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Granted: 1967-09-26
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Expires: 1985-01-14
Abstract
No abstract record available.
Inventors
- 👤 Louis P Polries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:19
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/295; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A SPEED CONTROL FOR DIRECT CURRENT MOTORS HAVING AN ARMATURE CIRCUIT ENERGIZED BY A SOURCE OF ALTERNATING CURRENT, A SILICON CONTROLLED RECTIFIER IN SAID ARMATURE CIRCUIT ADAPTED TO BE FIRED AT VARIOUS PHASE ANGLES DURING EACH ACTIVE PULSE OF SAID ALTERNATING CURRENT AND A BALANCED ARMATURE FEEDBACK CIRCUIT PRODUCING A VOLTAGE DERIVED FROM THE DIFFERENCE BETWEEN A VOLTAGE RESULTING FROM THE CURRENT FLOWING IN THE ARMATURE CIRCUIT AND A DIRECT CURRENT REFERENCE VOLTAGE, THE COMBINATION OF: (A) A LAMINATED FIRING TRANSFORMER HAVING A PRIMARY AND A SECONDARY, (B) SAID PRIMARY BEING CONNECTED IN A CONTROL CIRCUIT ENERGIZED FROM AN ALTERNATING CURRENT SOURCE, SAID CONTROL CIRCUIT INCLUDING, (C) A DIODE SHUNTING SAID PRIMARY,
Claim 2
Dependent Claim
113 words
IN A SPEED CONTROL FOR DIRECT CURRENT MOTORS HAVING AN ARMATURE CIRCUIT ENERGIZED BY A SOURCE OF ALTERNATING CURRENT, A SILICON CONTROLLED RECTIFIER IN SAID ARMATURE CIRCUIT ADAPTED TO BE FIRED AT VARIOUS PHASE ANGLES DURING EACH ACTIVE PULSE OF SAID ALTERNATING CURRENT AND A BALANCED ARMATURE FEEDBACK CIRCUIT PRODUCING A VOLTAGE DERIVED FROM THE DIFFERENCE BETWEEN A VOLTAGE RESULTING FROM THE CURRENT FLOWING IN THE ARMATURE CIRCUIT AND A DIRECT CURRENT REFERENCE VOLTAGE, THE COMBINATION OF: (A) A LAMINATED FIRING TRANSFORMER HAVING A PRIMARY AND A SECONDARY, (B) SAID PRIMARY BEING CONNECTED IN A CONTROL CIRCUIT ENERGIZED FROM AN ALTERNATING CURRENT SOURCE, SAID CONTROL CIRCUIT INCLUDING, (C) A DIODE SHUNTING SAID PRIMARY,
References Cited (Backward Citations)
US2858495A
Cited
US3286151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |