Patent US3214667A successfully refreshed from Google Patents.
US3214667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled rectifier supply for motor speed system
Assignee: Texas Instruments Inc
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Filing: 1962-01-31
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Granted: 1965-10-26
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 John H Foster
- 👤 Louis J Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:00
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/162; H02M7/1623; H02M7/1626; H02H; H02H7/00; H02H7/08; H02H7/0833; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/292; H02P7/293; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917; Y10S388/919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A SHUNT MOTOR CONTROL CIRCUIT COMPRISING: (A) AN ALTERNATING CURRENT SOURCE, (B) A FIRST BRIDGE RECTIFIER INCLUDING A DIODE IN EACH OF THE FOUR LEGS THEREOF AND HAVING OPPOSITE TERMINALS CONNECTED TO SAID SOURCE, (C) A FIELD WINDING FOR SAID SHUNT MOTOR CONNECTED ACROSS THE REMAINING TERMINALS OF SAID FIRST BRIDGE RECTIFIER, (D) A SECOND BRIDGE RECTIFIER INCLUDING TWO OF SAID DIODES FROM SAID FIRST BRIDGE RECTIFIER IN TWO OF THE FOUR LEGS THEREOF AND INCLUDING A CONTROLLED RECTIFIER IN EACH OF THE REMAINING TWO OF THE FOUR LEGS THEREOF, SAID SECOND BRIDGE RECTIFIER HAVING OPPOSITE TERMINALS CONNECTED TO SAID SOURCE, (E) AN ARMATURE WINDING FOR SAID SHUNT MOTOR CONNECTED ACROSS THE REMAINING TERMINALS OF SAID SECOND BRIDGE RECTIFIER, (F) AND RESISTING MEANS COUPLED TO SAID SOURCE ADAPTED TO PROVIDE FIRING POTENTIALS FOR SAID CONTROLLED RECTIFIERS AT SELECTED LEVELS WHEREBY A PLURALITY OF SPEED SETTINGS ARE AVAILABLE FOR SAID MOTOR.
Claim 2
Dependent Claim
150 words
A SHUNT MOTOR CONTROL CIRCUIT COMPRISING: (A) AN ALTERNATING CURRENT SOURCE, (B) A FIRST BRIDGE RECTIFIER INCLUDING A DIODE IN EACH OF THE FOUR LEGS THEREOF AND HAVING OPPOSITE TERMINALS CONNECTED TO SAID SOURCE, (C) A FIELD WINDING FOR SAID SHUNT MOTOR CONNECTED ACROSS THE REMAINING TERMINALS OF SAID FIRST BRIDGE RECTIFIER, (D) A SECOND BRIDGE RECTIFIER INCLUDING TWO OF SAID DIODES FROM SAID FIRST BRIDGE RECTIFIER IN TWO OF THE FOUR LEGS THEREOF AND INCLUDING A CONTROLLED RECTIFIER IN EACH OF THE REMAINING TWO OF THE FOUR LEGS THEREOF, SAID SECOND BRIDGE RECTIFIER HAVING OPPOSITE TERMINALS CONNECTED TO SAID SOURCE, (E) AN ARMATURE WINDING FOR SAID SHUNT MOTOR CONNECTED ACROSS THE REMAINING TERMINALS OF SAID SECOND BRIDGE RECTIFIER, (F) AND RESISTING MEANS COUPLED TO SAID SOURCE ADAPTED TO PROVIDE FIRING POTENTIALS FOR SAID CONTROLLED RECTIFIERS AT SELECTED LEVELS WHEREBY A PLURALITY OF SPEED SETTINGS ARE AVAILABLE FOR SAID MOTOR.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |