Lamp for use in subterranean applications

Illumination – Plural light sources – Diverse light generators

Patent

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Details

313 49, 313 51, 339111, 362158, 362164, 362189, 362216, 362223, 362263, 362267, 362362, 362374, 362375, H01J 552, H01J 560, H01J 554, H01J 6150, H01J 6156, F21V 1904, F21V 2304, F21V 2512

Patent

active

041864328

ABSTRACT:
A lamp for use in subterranean galleries such as mines in which the cold-cathode discharge tube is received in a housing which, in turn, is removably mounted in a receptacle and is held in place by a ring clamping a flange of the housing against a flange of the receptacle. The housing may be provided with a translucent cover so that the housing can be removed and replaced as a unit. A reed switch on the receptacle cooperates with a magnet on the housing to deenergize the terminals of the housing upon its removal. The terminals of the discharge tube are embedded in an insulating potting mass within the housing.

REFERENCES:
patent: 755307 (1904-03-01), Moore
patent: 2265475 (1941-12-01), Fodor
patent: 2640145 (1953-05-01), Martt
patent: 2791679 (1957-05-01), Hierholzer, Jr. et al.
patent: 3124307 (1964-03-01), Hoskins et al.
patent: 3382413 (1968-05-01), Gandhi et al.
patent: 3504339 (1970-03-01), Dailey
patent: 3748458 (1973-07-01), Morrison et al.

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