Improvements in and relating to projector lanterns

Abstract

Abstract 832,378. Optical projection apparatus. BRITISH THOMSON-HOUSTON CO. Ltd. March 10, 1958 [March 28, 1957], No. 10199/57. Class 97(1) [Also in Group XI] The light source for an optical projector comprises a concave mirror with a xenon discharge lamp arranged axially thereof and projecting partly through an aperture in the mirror. In the form shown the discharge tube 3 has a starting electrode 6 and main electrodes 4, 5 connected to external contacts 7, 8 supported by an adjustable member 17 and a spring loaded member 18 on supports 9, 10. The mirror 1 is carried on a frame 1b, with springs 1c between, the frame being pivotally mounted on supports 12 and adjustable by a screw 12b. The supports 9, 10, 12 are carried on a common base member which is detachable from the casing. The supports 9, 10 may be hollow, to carry a supply of cooling air.

Inventors

• 👤 Frederick Alfred Tuck

Bibliographic Details