Warm-up circuit with timed shut-off of the warm-up current

Details Warm-up circuit with timed shut-off of the warm-up current Warm-up circuit with timed shut-off of the warm-up current

1985-07-25

1986-10-14

Moore, David K.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Discharge control discharge device in the supply circuit

315 50, 315 71, 315362, 315291, 315311, 307135, H05B 3902

Patent

active

046174966

ABSTRACT:
A switch circuit is disclosed which warms-up a load prior to complete turn on. The circuit includes a single pole double throw switch and an amplifier. The input to the amplifier connects to the off throw of the switch and the amplifier is rendered nonconducting when the switch is off. However, when the switch is between its off and on position, as it is being thrown on, the amplifier conducts a half wave rectified warm-up current to the load. Then, when the switch is on, the amplifier is bypassed by a short circuit connecting between the on throw terminal of the switch and the load, and the load is driven to 100% capacity via this short circuit.

REFERENCES:
patent: 3028525 (1962-04-01), Morton
patent: 3215891 (1965-11-01), Fritz et al.
patent: 3309544 (1967-03-01), Lawson
patent: 3388293 (1968-06-01), Petschauer
patent: 3612945 (1971-10-01), Stevens
patent: 3742295 (1973-06-01), Irie
patent: 3943375 (1976-03-01), Williamson

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