Temperature control of a fluorescent lamp having a central and t

Details Temperature control of a fluorescent lamp having a central and t Temperature control of a fluorescent lamp having a central and t

1990-11-08

1992-03-10

Grimley, A. T.

Photocopying

Contact printing

Light boxes

313 15, 313490, 355 69, G03G 1504

Patent

active

050953362

ABSTRACT:
An amalgam fluorescent lamp is designed to operate with minimum axial illumination variations when changing from an off to an on state. This is accomplished by incorporating at least three amalgam patches internal to the lamp. Two patches are located at opposite ends of the lamp, and at least a third patch is centrally located. Each patch has an associated thermistor ands external heater sleeve. The patch temperature which correlates wiht the optimum lamp operating temperature is continuously monitored and adjustments are made to the heater sleeve elements to maintain the patches at desired optimum temperature.

REFERENCES:
patent: 3629641 (1971-12-01), Hofmann
patent: 3860852 (1975-01-01), Latassa et al.
patent: 4437041 (1984-03-01), Roberts
patent: 4499400 (1985-02-01), Anderson et al.
patent: 4581557 (1986-04-01), Johnson
patent: 4827313 (1989-05-01), Corona
patent: 4870454 (1989-09-01), Kurusu et al.

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