Direction indicator systems for tractor-trailer vehicles
Abstract
Abstract A DIRECTION INDICATOR SYSTEM FOR A TRACTOR-TRAILER VEHICLE HAS A DIRECTION INDICATOR SWITCH ON THE TRACTOR THROUGH WHICH THE LAMPS ON THE TRACTOR CAN BE ENERGISED AND A SUPPLY TERMINAL ON THE TRACTOR. FIRST AND SECOND FLASHER UNITS ARE CONNECTED IN SERIES BETWEEN THE SUPPLY TERMINAL AND THE MOVABLE CONTACT OF THE DIRECTION INDICATOR SWITCH, AND AN ELECTRICAL CONNECTOR ON THE TRACTOR IS PROVIDED FOR ENGAGEMENT WITH A COMPLEMENTARY CONNECTOR ON A TRAILER, THESE CONNECTORS WHEN ENGAGED CONNECTING THE FLASHER LAMPS AT OPPOSITE SIDES OF THE TRAILER IN PARALLEL WITH THE FLASHER LAMPS AT OPPOSITE SIDES OF THE TRACTOR RESPECTIVELY. A TWO POSITION SWITCH IS USED WHICH IN ONE POSITION SHORT-CIRCUITS THE FIRST FLASHER UNIT AND IN ITS OTHER POSITION SHORT-CIRCUITS THE SECOND FLASHER UNIT, SO THAT THE CORRECT FLASHER UNIT IS ALWAYS USED DEPENDING ON WHETHER THE TRAILER VEHICLE IS IN OPERATION, OR NOT.
Inventors
- 👤 Eric Bernard Parkes
Bibliographic Details
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |