US3147418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural motor hoist with saturable reactor control
Assignee: NORTHERN ENGINEERING WORKS
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Filing: 1962-01-29
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Granted: 1964-09-01
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Albert F Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:51
CPC Classifications
B; B66; B66C; B66C13/00; B66C13/18; B66C13/22; B66C13/23; B66C13/26; B66C2700/00; B66C2700/08; B66C2700/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A HOIST CONTROL COMPRISING A MAIN MOTOR DIRECTLY CONNECTED TO THE HOIST FOR DRIVING THE HOIST IN A HOISTING DIRECTION, AN AUXILIARY MOTOR DIRECTLY CONNECTED TO THE HOIST AND THE MAIN MOTOR TENDING TO ALWAYS DRIVE THE HOIST IN A LOWERING DIRECTION ON BEING ENERGIZED AND AN ELECTRIC CIRCUIT CONNECTED TO THE MOTORS FOR CONTROLLING THE ENERGIZATION OF THE MAIN AND AUXILIARY MOTORS TO DETERMINE THE DIRECTION AND SPEED OF DRIVING OF THE HOIST, INCLUDING A SATURABLE REACTOR IN CIRCUIT WITH THE MAIN MOTOR HAVING A CONTROL WINDING, A MAGNETIC AMPLIFIER OPERABLY ASSOCIATED WITH THE SATURABLE REACTOR FOR REGULATING THE SATURABLE REACTOR AND THEREBY CONTROLLING THE ELECTRICAL ENERGY RECEIVED BY THE MAIN MOTOR, SAID MAGNETIC AMPLIFIER HAVING AN OUTPUT CIRCUIT INCLUDING THE CONTROL WINDING OF THE SATURABLE REACTOR AND A PLURALITY OF MEANS IN THE ELECTRIC CIRCUIT FOR BIASING THE MAGNETIC AMPLIFIER TO CONTROL THE OUTPUT THEREOF APPLIED TO THE CONTROL WINDING OF THE SATURABLE REACTOR.
Claim 2
Dependent Claim
156 words
A HOIST CONTROL COMPRISING A MAIN MOTOR DIRECTLY CONNECTED TO THE HOIST FOR DRIVING THE HOIST IN A HOISTING DIRECTION, AN AUXILIARY MOTOR DIRECTLY CONNECTED TO THE HOIST AND THE MAIN MOTOR TENDING TO ALWAYS DRIVE THE HOIST IN A LOWERING DIRECTION ON BEING ENERGIZED AND AN ELECTRIC CIRCUIT CONNECTED TO THE MOTORS FOR CONTROLLING THE ENERGIZATION OF THE MAIN AND AUXILIARY MOTORS TO DETERMINE THE DIRECTION AND SPEED OF DRIVING OF THE HOIST, INCLUDING A SATURABLE REACTOR IN CIRCUIT WITH THE MAIN MOTOR HAVING A CONTROL WINDING, A MAGNETIC AMPLIFIER OPERABLY ASSOCIATED WITH THE SATURABLE REACTOR FOR REGULATING THE SATURABLE REACTOR AND THEREBY CONTROLLING THE ELECTRICAL ENERGY RECEIVED BY THE MAIN MOTOR, SAID MAGNETIC AMPLIFIER HAVING AN OUTPUT CIRCUIT INCLUDING THE CONTROL WINDING OF THE SATURABLE REACTOR AND A PLURALITY OF MEANS IN THE ELECTRIC CIRCUIT FOR BIASING THE MAGNETIC AMPLIFIER TO CONTROL THE OUTPUT THEREOF APPLIED TO THE CONTROL WINDING OF THE SATURABLE REACTOR.
References Cited (Backward Citations)
US1755079A
Cited
US2133365A
Cited
US2312592A
Cited
US2739279A
Cited
US2853666A
Cited
US3045162A
Cited
US3039034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |