Patent US3082364A successfully refreshed from Google Patents.
US3082364A
Expired / Lapsed
US
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Alternating current motor control and speed regulating systems
Assignee: Cutler Hammer Inc
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Filing: 1960-07-25
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Granted: 1963-03-19
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Expires: 1980-07-25
Abstract
No abstract record available.
Inventors
- 👤 Paul M Fischer
- 👤 Robert W Siebers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:22
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/16; H02P25/24; H02P25/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A MOTOR CONTROL SYSTEM, AN ALTERNATING CURRENT INDUCTION MOTOR OF THE SLIP-RING TYPE HAVING A PRIMARY WINDING AND A SECONDARY WINDING, A PLURALITY OF VARISTOR MEANS, A PLURALITY OF RECTIFIER MEANS CONNECTING THE RESPECTIVE VARISTOR MEANS TO SAID SECONDARY WINDING FOR CONDUCTING PORTIONS OF THE RECTIFIED SECONDARY CURRENT THERETHROUGH, SAID VARISTOR MEANS EACH HAVING A PREDETERMINED VALUE OF RESISTANCE FOR A GIVEN SECONDARY VOLTAGE TO REGULATE THE SPEED OF THE MOTOR TO DRIVE A LOAD SUBJECT TO VARIATION, AND SAID VARISTOR MEANS HAVING A SIGNIFICANT NEGATIVE VOLTAGE-COEFFICIENT OF RESISTANCE FOR REGULATING THE MOTOR SPEED UNDER VARYING LOAD.
Claim 2
Dependent Claim
98 words
IN A MOTOR CONTROL SYSTEM, AN ALTERNATING CURRENT INDUCTION MOTOR OF THE SLIP-RING TYPE HAVING A PRIMARY WINDING AND A SECONDARY WINDING, A PLURALITY OF VARISTOR MEANS, A PLURALITY OF RECTIFIER MEANS CONNECTING THE RESPECTIVE VARISTOR MEANS TO SAID SECONDARY WINDING FOR CONDUCTING PORTIONS OF THE RECTIFIED SECONDARY CURRENT THERETHROUGH, SAID VARISTOR MEANS EACH HAVING A PREDETERMINED VALUE OF RESISTANCE FOR A GIVEN SECONDARY VOLTAGE TO REGULATE THE SPEED OF THE MOTOR TO DRIVE A LOAD SUBJECT TO VARIATION, AND SAID VARISTOR MEANS HAVING A SIGNIFICANT NEGATIVE VOLTAGE-COEFFICIENT OF RESISTANCE FOR REGULATING THE MOTOR SPEED UNDER VARYING LOAD.
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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |