US3230438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual mode magnetic amplifier speed control
Assignee: Individual
•
Filing: 1957-02-08
•
Granted: 1966-01-18
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Expires: 1977-02-08
Abstract
No abstract record available.
Inventors
- 👤 Bracutt Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:15
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/288; H02P7/2885; H02P7/292; H02P7/293; H02P7/298; H02P7/2985; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/913
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A CONTROL FOR A DIRECT CURRENT MOTOR, IN COMBINATION, A DIRECT CURRENT MOTOR HAVING AN ARMATURE WINDING AND A FIELD WINDING, A MAGNETIC AMPLIFIER AND RECTIFIER SUPPLYING SAID FIELD WINDINGS WITH DIRECT CURRENT, CONTROL MEANS REGULATING THE OUTPUT OF SAID MAGNETIC AMPLFIER, A SATURABLE REACTOR SAID SATURABLE REACTOR HAVING ALTERNATING CURRENT PRIMARY WINDINGS AND A DIRECT CURRENT BIAS WINDING, SAID BIAS WINDING BEING CONNECTED TO SAID MOTOR FIELD WINDING, A BRIDGE TYPE RECTIFIER SUPPLIED BY SAID PRIMARY WINDINGS, THE DIRECT CURRENT TERMINALS OF WHICH ARE CONNECTED TO SAID MOTOR ARMATURE WINDING AND RELAY MEANS CONTROLLED BY THE VOLTAGE OF SAID FIELD WINDING, SAID RELAY MEANS ALLOWING A DIRECT CURRENT SURGE UPON SAID ARMATURE WINDING UPON OBTAINING A PREDETERMINED VOLTABE ON ACTIVATION BY THE VOLTAGE OF SAID FIELD WINDING.
Claim 2
Dependent Claim
129 words
IN A CONTROL FOR A DIRECT CURRENT MOTOR, IN COMBINATION, A DIRECT CURRENT MOTOR HAVING AN ARMATURE WINDING AND A FIELD WINDING, A MAGNETIC AMPLIFIER AND RECTIFIER SUPPLYING SAID FIELD WINDINGS WITH DIRECT CURRENT, CONTROL MEANS REGULATING THE OUTPUT OF SAID MAGNETIC AMPLFIER, A SATURABLE REACTOR SAID SATURABLE REACTOR HAVING ALTERNATING CURRENT PRIMARY WINDINGS AND A DIRECT CURRENT BIAS WINDING, SAID BIAS WINDING BEING CONNECTED TO SAID MOTOR FIELD WINDING, A BRIDGE TYPE RECTIFIER SUPPLIED BY SAID PRIMARY WINDINGS, THE DIRECT CURRENT TERMINALS OF WHICH ARE CONNECTED TO SAID MOTOR ARMATURE WINDING AND RELAY MEANS CONTROLLED BY THE VOLTAGE OF SAID FIELD WINDING, SAID RELAY MEANS ALLOWING A DIRECT CURRENT SURGE UPON SAID ARMATURE WINDING UPON OBTAINING A PREDETERMINED VOLTABE ON ACTIVATION BY THE VOLTAGE OF SAID FIELD WINDING.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |