US3315134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch
Assignee: Robert Bosch GmbH
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Filing: 1964-09-21
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Granted: 1967-04-18
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 Scholl Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:02
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016; H02P29/0027; B; B60; B60W; B60W10/00; B60W10/02; B60W10/10; F; F16; F16D; F16D48/00; F16D48/06; F16D48/064; H02P15/00; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1022; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/70418; F16D2500/71; F16D2500/7107; F16D2500/7109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A CIRCUIT ARRANGEMENT FOR OPERATING AN ELECTROMAGNETICALLY ENGAGEABLE AND DISENGAGEABLE CLUTCH HAVING A MAGNETIC WINDING, WHEREIN WORKING CURRENT PULSES OF AT LEAST APPROXIMATELY UNIFORM DURATION ARE FED TO THE MAGNETIC WINDING FROM A SOURCE OF DIRECT CURRENT AND AT A PULSE REPETITION FREQUENCY WHICH IS IN SYNCHRONISM WITH A CONTROL VALUE, SAID CURRENT PULSES BEING FED VIA A POWER TRANSISTOR OPERATING IN ON-OFF OPERATION WHICH IS CONTROLLED BY AN INPUT TRANSISTOR OPERATING IN PHASE OPPOSITION, AHEAD OF WHICH INPUT TRANSISTOR THERE IS CONNECTED A CONTROL TRANSISTOR WHICH CHANGES BETWEEN CONDUCTIVE AND BLOCKED STATES IN SYNCHRONISM WITH THE BEAT OF THE CONTROL VALUE, THE IMPROVEMENT WHICH COMPRISES, IN COMBINATION: (A) RESISTOR MEANS CONNECTED BETWEEN THE COLLECTOR OF SAID CONTROL TRANSISTOR AND ONE TERMINAL OF SAID SOURCE OF DIRECT CURRENT; (B) A SERIES-CIRCUIT INCORPORATING (1) A FIRST CAPACITOR HAVING ONE TERMINAL CONNECTED TO SAID COLLECTOR OF SAID CONTROL TRANSISTOR,
Claim 2
Dependent Claim
147 words
A CIRCUIT ARRANGEMENT FOR OPERATING AN ELECTROMAGNETICALLY ENGAGEABLE AND DISENGAGEABLE CLUTCH HAVING A MAGNETIC WINDING, WHEREIN WORKING CURRENT PULSES OF AT LEAST APPROXIMATELY UNIFORM DURATION ARE FED TO THE MAGNETIC WINDING FROM A SOURCE OF DIRECT CURRENT AND AT A PULSE REPETITION FREQUENCY WHICH IS IN SYNCHRONISM WITH A CONTROL VALUE, SAID CURRENT PULSES BEING FED VIA A POWER TRANSISTOR OPERATING IN ON-OFF OPERATION WHICH IS CONTROLLED BY AN INPUT TRANSISTOR OPERATING IN PHASE OPPOSITION, AHEAD OF WHICH INPUT TRANSISTOR THERE IS CONNECTED A CONTROL TRANSISTOR WHICH CHANGES BETWEEN CONDUCTIVE AND BLOCKED STATES IN SYNCHRONISM WITH THE BEAT OF THE CONTROL VALUE, THE IMPROVEMENT WHICH COMPRISES, IN COMBINATION: (A) RESISTOR MEANS CONNECTED BETWEEN THE COLLECTOR OF SAID CONTROL TRANSISTOR AND ONE TERMINAL OF SAID SOURCE OF DIRECT CURRENT; (B) A SERIES-CIRCUIT INCORPORATING (1) A FIRST CAPACITOR HAVING ONE TERMINAL CONNECTED TO SAID COLLECTOR OF SAID CONTROL TRANSISTOR,
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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |