D.C. solenoid

Details D.C. solenoid D.C. solenoid

1989-12-13

1992-07-07

Williams, Howard L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361210, 361154, 25112909, H01F 713

Patent

active

051288265

ABSTRACT:
In a d.c. solenoid in which a thermistor having a positive temperature coefficient is connected in series with a main coil, a subcoil is connected in parallel with the series connection of the main coil and the thermistor, so that a large magnetic force can be produced at the solenoid energization starting time, and generation of heat from the thermistor can be suppressed to prevent burn-out of the main coil due to continuous current supply. Both the main coil and the subcoil, when energized alone, are capable of actuating the solenoid. The d.c. solenoid is applied to a valve in a vaporized fuel absorption system.

REFERENCES:
patent: 1325048 (1919-12-01), Simon
patent: 3159768 (1964-12-01), Flanagan
patent: 3387188 (1968-06-01), Euler
patent: 4032823 (1977-06-01), Arvisenet et al.

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