| 摘要 |
433,771. Batteries. PLESSEY CO., Ltd., Vicarage Lane, Ilford, Essex.-(Mallory & Co., Inc., P. R. ; 3029, East Washington Street, Indianapolis, Indiana, U.S.A.) May 2, 1935, No. 13114. [Class 53] A voltaic couple particularly for applying a negative potential to the control grid of an electric discharge tube consists of an electrode of cadmium, aluminium, zinc or other electropositive material in contact with an electrode of solid chromium trioxide. The Figure shows two couples joined in series, each consisting of a cadmium disc 2 in contact with a pellet 3 of compressed chromium trioxide. The couples are separated by a nickel washer 4 and are pressed together by a spring 7. A fibre casing 1 is closed at each end by pitch 11. Specification 427,098 is referred to. |
