US3084319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor speed control
Assignee: US Philips Corp
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Filing: 1958-01-14
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Granted: 1963-04-02
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Expires: 1978-01-14
Abstract
No abstract record available.
Inventors
- 👤 Hooijkamp Cornelis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:05
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/298; Y; Y10; Y10S; Y10S388/00; Y10S388/90; Y10S388/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A DRIVING DEVICE COMPRISING A COMMUTATOR MOTOR HAVING AN ARMATURE AND A FIELD ENERGIZING CIRCUIT, A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, THE EMITTER-COLLECTOR PATH OF SAID TRANSISTOR BEING CONDUCTIVELY CONNECTED TO SAID FIELD ENERGIZING CIRCUIT, AND CONTROL MEANS FOR CONTROLLING THE CURRENT FLOWING THROUGH SAID EMITTER-COLLECTOR PATH AND SAID FIELD ENERGIZING CIRCUIT, SAID CONTROL MEANS BEING RESPONSIVE TO THE ARMATURE CURRENT OF THE MOTOR, WHEREBY THE SPEED OF THE MOTOR IS STABILIZED WITH RESPECT TO VARIATIONS IN THE LOAD TORQUE OF THE DRIVING DEVICE.
Claim 2
Dependent Claim
86 words
A DRIVING DEVICE COMPRISING A COMMUTATOR MOTOR HAVING AN ARMATURE AND A FIELD ENERGIZING CIRCUIT, A TRANSISTOR HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, THE EMITTER-COLLECTOR PATH OF SAID TRANSISTOR BEING CONDUCTIVELY CONNECTED TO SAID FIELD ENERGIZING CIRCUIT, AND CONTROL MEANS FOR CONTROLLING THE CURRENT FLOWING THROUGH SAID EMITTER-COLLECTOR PATH AND SAID FIELD ENERGIZING CIRCUIT, SAID CONTROL MEANS BEING RESPONSIVE TO THE ARMATURE CURRENT OF THE MOTOR, WHEREBY THE SPEED OF THE MOTOR IS STABILIZED WITH RESPECT TO VARIATIONS IN THE LOAD TORQUE OF THE DRIVING DEVICE.
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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |