| 摘要 |
524,800. Lighting systems. GENERAL ELECTRIC CO., Ltd., BOWTELL, J. N., and JENKINS, H. G. June 13, 1938, No. 17491. [Class 75 (iv)] For interior lighting one or more neon discharge lamps comprising a luminescent layer of willemite and/or calcium tungstate are used in combination with one or more low pressure mercury vapour discharge lamps comprising a magnesium or zinc tungstate layer, the light being mixed by a diffusing background close to the lamp or by other optical means. Ratios are given for the relative intensities of the lamps according to requirements. Specifications. 457,486, 469,732, 469,913, and 495,415, [all in Group XX], are referred to. |
