Improvements in illuminating projectors for cinematography, floodlights, searchlights and the like,申请号GB19450003867-传众专利搜索

Improvements in illuminating projectors for cinematography, floodlights, searchlights and the like

申请公布号：GB598308(A)

申请号：GB19450003867

申请日期：1945.02.15

申请公布日期：1948.02.16

申请人：

NORMAN EBENEZER HEWITT

分类号：G03B21/20

主分类号：G03B21/20

摘要：598,308. Electric lamps. HEWITT, N. E. Feb. 15, 1945, Nos. 3867/45 and 966/46. [Classes 75 (ii) and 75 (iv)] [Also in Group XX] Vacuum chambers 23, 24 or chambers fitted with evacuating means are arranged behind the reflector 21 and reflecting inner surface 22 of the casing of a projection lamp. The casing may be fitted with a front lens 11 which may form the front of a cylindrical or annular vacuum chamber 12. The chamber 12 may be divided by a transparent partition 18 to form a separate chamber through which a coloured gas or fluid may be passed to colour the light. The reflector 21 and reflecting surface 22 may be continuous and be backed by a single evacuated chamber. Specifications 7311/09, [Class 75 (iv)], 110,489, [Class 97 (i)], 428,498, 552,970, 557,162 and 598,340 are referred to.