Raymond D Fleming

US Patent:

41692373, Sep 25, 1979

Filed:

Sep 6, 1978

Appl. No.:

5/939930

Inventors:

George J. English - Reading MA
Robert E. Levin - S. Hamilton MA
Raymond T. Fleming - Lexington KY

Assignee:

GTE Sylvania Incorporated - Stamford CT

International Classification:

H01K 114
H01K 132

US Classification:

313 1

Abstract:

A high voltage movie light including a plastic holder, a pair of spaced-apart incandescent lamp units positioned within the holder, and means for electrically connecting the lamp units to an external power source. Each lamp unit comprises a formed glass reflector and a tungsten-halogen lamp located within the reflector and having a planar, dual filament structure therein. The lamp units are positioned within the holder such that the planes occupied by the respective dual filament structures intersect at a predetermined angle, e. g. 90 to 110 degrees, in order that the light output from each unit will be centered on a respective diagonal of the rectangular subject field being illuminated by the movie light. Each unit produces a bimodal intensity distribution, thus further assuring increased illumination levels on the subject field. An incandescent lamp unit suitable for use in the movie light is also disclosed.