Mercury vapor discharge lamp containing device for heating amalg

Details Mercury vapor discharge lamp containing device for heating amalg Mercury vapor discharge lamp containing device for heating amalg

1991-12-04

1993-08-17

O'Shea, Sandra L.

Electric lamp and discharge devices

Having heating means to control gas/vapor, gas or vapor...

Vapor generating

313490, 313 15, H01J 1702, H01J 6152

Patent

active

052372405

ABSTRACT:
A mercury vapor discharge lamp such as a negative glow discharge lamp includes a light-transmitting envelope containing a noble gas fill material. An anode electrode and a cathode electrode are spacedly located within the envelope. An amalgam-forming material for regulating the mercury vapor pressure of the lamp is disposed within the envelope. In order to increase the mercury vapor pressure and consequently the light output of the lamp at low ambient temperatures, a heating element is disposed within the envelope and in close thermal proximity to the amalgam-forming material. A thermostatic switch coupled to the heating element is activated when the temperature adjacent the amalgam-forming material is below a predetermined temperature.

REFERENCES:
patent: 3336502 (1967-08-01), Gilliatt
patent: 3629641 (1971-12-01), Holman et al.
patent: 3859555 (1975-01-01), Latassa et al.
patent: 3890531 (1975-06-01), Panofski et al.
patent: 4904900 (1990-02-01), Bouchard et al.
patent: 4907998 (1990-03-01), Kuijer et al.
patent: 5001394 (1991-03-01), Bouchard
patent: 5027030 (1991-06-01), Bouchard et al.
patent: 5066892 (1991-11-01), Bouchard et al.
patent: 5095336 (1992-03-01), Corona et al.

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