基本信息
摘要：814,440. Semi-conductor vibration indicators. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. July 12, 1957 [July 23, 1956], No. 22146/57. Class 40 (3). [Also in Group XXXVIII] Vibration of a rotating body causes the spot produced by a beam of radiation to traverse a semi-conductor assembly comprising a centre zone of one conductivity flanked by two zones of opposite conductivity, the electrical signals produced are proportional to the magnitude of vibration. Fig. 3 shows the rotating body 69, the bearings 57 and 71 are seismically supported by the flat springs 63, 65, 75 and 77. Light beams 11A and 11B from the sources 1A and 1B are concentrated by the lens systems 15A and 15B and reflected on to the semiconductor assemblies 3A and 3B by the reflecting surfaces 61 and 73 attached to the bearings. In operation the seismic mounting allows vibration in a plane substantially parallel to the base 67, the reflecting surfaces move towards and away from the light sources causing the spot at which the reflected light beam strikes to traverse the semi-conductor assemblies. The apparatus is dimensioned to limit the traverse to the centre zones 7A and 7B of the assemblies. The output voltages produced across the loads 17A and 17B are indicative of the magnitude of vibration. In a second embodiment a pellet of radio-active material, producing alpha, beta or gamma rays, is inserted in the bearing housing, a beam of radiation escapes via a small hole in the housing and operates on the semi-conductor assembly.
摘要附图：
