Larson and Taylor
Illuminating device
 This invention provides an illuminating device characterized in that the device comprises a light-transmitting rod for transmitting the light incident on one end thereof toward the otehr end, a diffusion pattern formed on the outer peripheral surface of the rod by adhering a fine powder of high refractive index in the shape of a line extending continuously or discretely axially of the rod, and a transparent protective tube covering the peripheral surface of the rod with a circumferential clearance formed between the rod and the tube, the clearance between the rod and the protective tube being sealed off at opposite ends thereof. 
Agency of Industrial Science and Technology Daikin Industries, Ltd.
F G
F25D G02B
inventional inventional
Kanenaga Toru Hiroshi Junji Shun
Fujii Komiyama Yamashita Hayakawa Koizumi