Lamp intensity control apparatus comprising preset means

Details Lamp intensity control apparatus comprising preset means Lamp intensity control apparatus comprising preset means

1980-10-27

1982-11-16

La Roche, Eugene

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315135, 315199, 315291, 315293, 315DIG4, H05B 3908

Patent

active

043596703

ABSTRACT:
Push buttons (9u, 9d) are provided to select the desired intensity of a lamp (1) for electrostatic copying or the like. The selected intensity is numerically displayed. A preset function is provided to preset the intensity to a standard value when power is first applied to the apparatus. The intensity may thereafter be manually varied using the push buttons (9u, 9d). The lamp intensity is controlled by means of phase angle control of a thyristor (2). Provision is made to compensate the phase angle control for variations in the A.C. power supply voltage.

REFERENCES:
patent: 3968401 (1976-07-01), Bryant
patent: 3990000 (1976-11-01), Digneffe
patent: 4249111 (1981-02-01), Gluck

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