Mechanism and method for controlling the temperature and output

Details Mechanism and method for controlling the temperature and output Mechanism and method for controlling the temperature and output

1988-07-11

1989-05-02

Hix, L. T.

Photocopying

Projection printing and copying cameras

With temperature or foreign particle control

355 69, 313490, 313 15, G03B 2752, G03B 2772

Patent

active

048273139

ABSTRACT:
An amalgam fluorescent lamp is operated under high output and loading conditions by implementation of a control circuit to monitor and adjust lamp temperature. A variable density multi-element heater sleeve is connected to a controller which monitors the sleeve temperature and adjusts the power input to one or more of the sleeve segments. A separate control circuit maintains the lamp illumination output at a programmed level by monitoring a detected level of lamp output and comparing it with a pre-established reference signal.

REFERENCES:
patent: 3779640 (1973-12-01), Kidd
patent: 4233653 (1980-11-01), Jongerius et al.
patent: 4751551 (1988-06-01), Beiter et al.

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