Electric un-symmetrically conductive systems, particularly dry-plate rectifiers

Abstract

Abstract 707,008. Dry plate rectifiers. LICENTIA PATENT-VERWALTUNGS-GES. Oct. 31, 1951 [Oct. 1, 1948], No. 25438/51. Class 37 A multi-layer dry plate rectifier is made up of a base electrode 1, e.g. of aluminium, and proceeding from 1 a layer 2 of Bi 2 Se 3 or PbO 2 , a layer 3 of selenium or copper oxide, a layer 4 of BiSe or ZnO, a layer 5 of Bi 2 Se 3 or PbO 2 and finally a counter electrode 6, e.g. of bismuth. The layers 2 and 5 each have mixed semi-conductive character, i.e. comprise deficit and excess centres; the layer 3 is a deficit semi-conductor and the layer 4 is an excess semi-conductor. The layers 3 and 4 may be interchanged. The blocking layer occurs only at the boundary between 3 and 4, i.e. between the excess and deficit layers. 707,015. Electric condensers. COMPAGNIE GENERALE DE' TELEGRAPHIE, SANS FIL. Jan. 28, 1952 [Feb. 9, 1951], No. 2887/52. Class 37 A tubular ceramic power system condenser comprising inner and outer electrode coatings is equipped, Fig. 2, with an inner electrode and radiator structure which consists of a cylindrical array of radial plates 6 extending tangentially from a, supply connector central tube 4 and each with a U-shaped termination comprising a convex face 9 soldered to the inner electrode coating Fig. 5. As shown, Fig. 4, the free end branch of each U may be split and folded to form oppositely directed sections 11, 12 each inclined at 45 degrees to the condenser axis. Several cooling and electrode structures may be positioned in staggered relation as exemplified in Fig. 3.

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