Patent US3156397A successfully refreshed from Google Patents.
US3156397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of strip driving means
Assignee: Associated Electrical Industries Ltd
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Filing: 1962-04-27
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Granted: 1964-11-10
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Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
- 👤 Davies Richard Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:43
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/48; H02P5/485
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
AN ARRANGEMENT FOR CONTROLLING THE SAG OF A CATENARY LENGTH OF A TRAVELLING CONDUCTING MATERIAL, COMPRISING TWO ELECTRIC MOTORS COUPLED IN DRIVING RELATIONSHIP TO THE TWO ENDS OF SAID LENGTH, BOTH MOTORS HAVING THEIR ARMATURES SUPPLIED FROM A COMMON DIRECT CURRENT SOURCE, A DIRECT CURRENT BOOSTER GENERATOR HAVING AN ARMATURE CONNECTED IN SERIES WITH THE ARMATURE OF ONE OF SAID TWO MOTORS, A FIELD WINDING OF SAID BOOSTER GENERATOR BEING SUPPLIED FROM A RECTIFIER WHICH IS FED FROM AN OSCILLATOR THROUGH AN AMPLIFIER, SAID AMPLIFIER HAVING A FEEDBACK CIRCUIT AND A CAPACITOR HAVING AN ELECTRODE FORMED BY THE SAID LENGTH OF MATERIAL BEING INCLUDED IN SAID FEEDBACK CIRCUIT.
Claim 2
Dependent Claim
108 words
AN ARRANGEMENT FOR CONTROLLING THE SAG OF A CATENARY LENGTH OF A TRAVELLING CONDUCTING MATERIAL, COMPRISING TWO ELECTRIC MOTORS COUPLED IN DRIVING RELATIONSHIP TO THE TWO ENDS OF SAID LENGTH, BOTH MOTORS HAVING THEIR ARMATURES SUPPLIED FROM A COMMON DIRECT CURRENT SOURCE, A DIRECT CURRENT BOOSTER GENERATOR HAVING AN ARMATURE CONNECTED IN SERIES WITH THE ARMATURE OF ONE OF SAID TWO MOTORS, A FIELD WINDING OF SAID BOOSTER GENERATOR BEING SUPPLIED FROM A RECTIFIER WHICH IS FED FROM AN OSCILLATOR THROUGH AN AMPLIFIER, SAID AMPLIFIER HAVING A FEEDBACK CIRCUIT AND A CAPACITOR HAVING AN ELECTRODE FORMED BY THE SAID LENGTH OF MATERIAL BEING INCLUDED IN SAID FEEDBACK CIRCUIT.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |