US3112418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for gradually establishing an electric current, notably for controlling electromagnetic clutches
Assignee: Renault SA
•
Filing: 1959-06-15
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Granted: 1963-11-26
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Expires: 1979-06-15
Abstract
No abstract record available.
Inventors
- 👤 Peras Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/64; F; F16; F16D; F16D48/00; F16D48/06; F16D48/064; F16D2500/00; F16D2500/10; F16D2500/104; F16D2500/10443; F16D2500/10475; F16D2500/30; F16D2500/316; F16D2500/3166; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/7041; F16D2500/70418
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A CONTROL SYSTEM FOR GRADUAL ESTABLISHMENT AND QUICK CUT OFF OF AN ELECTRIC CURRENT FOR ELECTRICAL COUPLING APPARATUS, PARTICULARLY FOR ENERGIZING ELECTRICAL CLUTCHES COMPRISING: IN COMBINATION, A CLUTCH COIL; A D.C. SOURCE; A TRANSISTOR HAVING A COLLECTOR ELECTRODE, AN EMITTER ELECTRODE AND A BASE ELECTRODE, SAID COLLECTOR ELECTRODE BEING CONNECTED TO ONE TERMINAL OF SAID SOURCE THROUGH SAID COIL AND SAID EMITTER ELECTRODE BEING CONNECTED TO THE OTHER TERMINAL OF SAID SOURCE; A TIMING CIRCUIT CONNECTING SAID EMITTER ELECTRODE AND BASE ELECTRODE IN CIRCUIT WITH THE SOURCE AND INCLUDING A VARIABLE CORRECTING RESISTOR; AND MEANS IN SAID TIMING CIRCUIT VARYING THE POTENTIAL ACROSS SAID CORRECTING RESISTOR AS A PREDETERMINED FUNCTION OF TIME, WHEREBY TO VARY THE CURRENT FLOWING THROUGH SAID BASE ELECTRODE.
Claim 2
Dependent Claim
122 words
A CONTROL SYSTEM FOR GRADUAL ESTABLISHMENT AND QUICK CUT OFF OF AN ELECTRIC CURRENT FOR ELECTRICAL COUPLING APPARATUS, PARTICULARLY FOR ENERGIZING ELECTRICAL CLUTCHES COMPRISING: IN COMBINATION, A CLUTCH COIL; A D.C. SOURCE; A TRANSISTOR HAVING A COLLECTOR ELECTRODE, AN EMITTER ELECTRODE AND A BASE ELECTRODE, SAID COLLECTOR ELECTRODE BEING CONNECTED TO ONE TERMINAL OF SAID SOURCE THROUGH SAID COIL AND SAID EMITTER ELECTRODE BEING CONNECTED TO THE OTHER TERMINAL OF SAID SOURCE; A TIMING CIRCUIT CONNECTING SAID EMITTER ELECTRODE AND BASE ELECTRODE IN CIRCUIT WITH THE SOURCE AND INCLUDING A VARIABLE CORRECTING RESISTOR; AND MEANS IN SAID TIMING CIRCUIT VARYING THE POTENTIAL ACROSS SAID CORRECTING RESISTOR AS A PREDETERMINED FUNCTION OF TIME, WHEREBY TO VARY THE CURRENT FLOWING THROUGH SAID BASE ELECTRODE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |