Improvements relating to the detection and measurement of the frequency of vibrationof vibratory bodies
817,683. Measuring vibration. BRITISH THOMSON-HOUSTON CO. Ltd. Nov. 25, 1955 [Nov. 26, 1954], No. 34376/54. Class 40 (3). The vibration of a plate B coated with a photo-elastic material E such as " Araldite D " (Registered Trade Mark) is detected and/or measured by a photo-cell D, light fr...
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Zusammenfassung: | 817,683. Measuring vibration. BRITISH THOMSON-HOUSTON CO. Ltd. Nov. 25, 1955 [Nov. 26, 1954], No. 34376/54. Class 40 (3). The vibration of a plate B coated with a photo-elastic material E such as " Araldite D " (Registered Trade Mark) is detected and/or measured by a photo-cell D, light from a source L passing through a polarizer plate P1 and being reflected by the surface E and directed on to the cell D by a lens 0 and analyser plate P2. |
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