Illumination – Curvilinear light source
Patent
1983-12-16
1985-10-22
Nelson, Peter A.
Illumination
Curvilinear light source
362217, 362295, 313264, F21S 500
Patent
active
045492514
ABSTRACT:
The invention provides an advantageous shape of discharge tube and a discharge lamp including such a tube which is particularly beneficial for use in dimensions intended to replace general lighting service lamps but can readily be adapted to other sizes. The discharge tube is shaped to define a substantial part of the boundary of a substantially planar zone. The part of the tube defining the boundary includes at least one straight portion. In one embodiment it defines three sides of a square with the ends of the tube being re-entrant into the fourth side. In a preferred embodiment a support housing central to the zone holds the ends of the tube thereby supporting it. Preferably one or more arms extending from the support housing grip the tube between its ends for further support. The support housing may include some circuit elements and provides electrical connection to the lamp as well as providing a convenient point to handle the lamp.
REFERENCES:
patent: 2304594 (1942-12-01), Pennybacker
patent: 2451987 (1948-10-01), Sloan
patent: 2473878 (1949-06-01), Greiner
patent: 4161020 (1979-07-01), Miller
patent: 4173730 (1979-11-01), Young et al.
patent: 4268780 (1981-05-01), Roche et al.
patent: 4318160 (1982-03-01), Dooley et al.
patent: 4458301 (1984-07-01), Chapman et al.
Illuminating Engineering (vol. XXXVIII Jan.-Dec., 1943) Illuminating Engineering Society.
Antonis Basil
Chapman John M.
Nelson Peter A.
Thorn Emi plc
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