| 摘要 |
1,129,401. Photo-electric smoke or particle detector. WALTER KIDDE CO. Ltd. Feb. 24, 1967, [Feb. 24, 1966] No.8292/66. Heading G1A. The description is the same as that of Specification, 1, 129,402 but the claims are directed to a smoke detector comprising a lens for directing light from a source in a beam the edges of which pass close to a number of main cells arraged to form a light passage wherein the light source is a halogenated lamp bulb having a small point of light, such as a quartz iodine or tungsten iodine lamp. |
