A sound proof enclosure for electromagnetic vibrators or other apparatus

摘要

744,152. Cases for electromagnetic vibrators. C.A.V., Ltd. May 14, 1954 [May 26, 1953], No. 14604/53. Class 38(5) A sound-proof enclosure for e.g. an electromagnetic interrupter a comprises an inner part d formed of two complementary pieces of rubber or other soft flexible material joined at their flanges e, and ,spaced by an air gap g from a rigid outer part b of metal or hard plastic material. The part b is formed of two complementary pieces joined at their flanges c by screws f, the leads entering through grooves i in the flanges c and being gripped between the flanges e.