Lighting apparatus

Details Lighting apparatus Lighting apparatus

1976-06-29

1978-01-24

Hix, L. T.

Illumination

Elongated source light unit or support

With ventilating or cooling means

313490, H05B 3302

Patent

active

040705706

ABSTRACT:
A rugged lighting device that is preferably for use in explosive atmosphere such as on heavy coal mining equipment has a fluorescent lighting source that is readily replaceable without requiring disassembly of the device. The lighting apparatus is constructed to operate at a very efficient high output light level even over extended periods of operation and employs either a heat sinking technique for providing this efficient operation or preferably a very high output fluorescent tube designed for high temperature operation and having an amalgam patch. The apparatus basically comprises front and rear support structures interconnected by a transparent lamp tube, a lamp assembly slideably received by the lamp tube, and a cage mounted over the support structures for protecting the lamp assembly. The front support structure is constructed to receiving electrical wiring for the lamp assembly and comprises female connector means for mating with a male connector means of the lamp assembly. The rear support structure comprises a cap which may be removed to permit withdrawal of the lamp assembly. The lamp assembly comprises, in addition to a fluorescent lamp, mounting means for opposite ends of the lamp, a ground plane and, in one embodiment, heat sink means disposed at the rear end of the lamp assembly.

REFERENCES:
patent: 2392202 (1946-01-01), Tornblom
patent: 2476856 (1949-07-01), Geenens
patent: 2760053 (1956-08-01), Choisser
patent: 2874270 (1959-02-01), Douglass et al.
patent: 3140054 (1964-07-01), Oharenko
patent: 3249749 (1966-05-01), Haas
patent: 3263111 (1966-07-01), Doering
patent: 3786247 (1974-01-01), Eilert et al.
patent: 3809944 (1974-05-01), Jongerius et al.
patent: 3833801 (1974-09-01), Trevithick
patent: 3906284 (1975-09-01), Franck et al.

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