Relay power supply
Abstract
Abstract OF A RELAY, THIS BEING SUFFICIENT TO ENERGIZE THE COIL TRANSIENTLY. THIS CLOSES A CONTACT RL1/1 WHICH CONNECTS THE STATION BATTERY B1 TO THE MONITORING CIRCUIT. THE MONITORING CIRCUIT THEN DRAWS ANY REQUIRED POWER FROM THE STATION BATTERY, FOR AS LONG AS NECESSARY. 1 RL1 THE INVENTION PROVIDES A POWER SUPPLY FOR A MONITORING CIRCUIT FOR AN AC TRANSMISSION SYSTEM. SUCH A POWER SUPPLY NORMALLY HAS TO PROVIDE ONLY A SMALL, CONTINUOUS CURRENT, BUT OCCASIONALLY MUCH HEAVIER CURRENTS. TO ELIMINATE INTERNAL BATTERIES, STATION BATTERIES CAN BE USED, BUT THIS TENDS TO IMPOSE A SMALL BUT CONTINUOUS DRAIN ON THEM. BY THE INVENTION, THE SIGNAL BEING MONITORED IS USED TO PROVIDE SUFFICIENT POWER TO MEET THE NORMAL DEMAND OF THE MONITORING CIRCUIT, AND ALSO TO CHARGE A CAPACITOR C1. WHEN RELAY OPERATION IS REQUIRED, C1 IS DISCHARGED THROUGH COIL D R A W I N G
Inventors
- 👤 M Simpson
- 👤 B Felton
Bibliographic Details
Claims Analysis
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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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |