Control arrangement for electrically propelled traction vehicle
Abstract
Abstract A CONTROL ARRANGEMENT FOR A BATTERY POWERED TRACTION VEHICLE HAVING A FOOT PEDAL TYPE OF THROTTLE CONTROL. APPLICATION OF INCREASING PRESSURE TO THE PEDAL SEQUENTIALLY CLOSES A MOTOR CONTRACTOR TO ENERGIZE THE MOTOR, CLOSES ARMATURE SWITCHES TO DECREASE SERIES ARMATURE RESISTANCE, AND OPENS FIELD WEAKENING SWITCHES TO PROVIDE FIELD WEAKENING. PROVISION IS MADE FOR MOTOR OPERATION AT PREDETERMINED TORQUE-SPEED INCREMENT WITHOUT CONTINUED APPLICATION OF PEDAL PRESSURE. A LOGIC CIRCUIT IS RESPONSIVE TO CLOSURE OF A PRESELECTED ARMATURE SWITCH AND OF A PRESELECTED FIELD WEAKENING SWITCH IS CONNECTED IN CIRCUIT WITH A RELAY CONNECTED TO MAINTAIN OPERATION OF THE VEHICLE AT THE DESIRED TORQUE-SPEED INCREMENT UPON ACTIVATION OF A CONTROL SWITCH.
Inventors
- 👤 W Mason
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |