| 摘要 |
<p>389,470. Static contact rectifiers. JONES, R. J. ELSOME-, 5, Clifton Gardens, Golders Green, London. Sept. 10, 1931, Nos. 25445, and 32815, (Divided application). [Class 37.] In order to prevent destructive electrochemical action occurring between the electrodes of a dry surface rectifier, an intermediate relatively inert layer of a metallic derivative other than a derivative of the elements of the anode or cathode, e.g. an oxide of barium, thorium, uranium, lithium or cobalt), is interposed between the electrodes of each couple. Any appropriate materials may form the electrodes, and the intermediate layer may be applied to the anode as a solution which is subsequently evaporated. By way of example, an eight couple assembly arranged for full-wave rectification is described. Couples comprising brass plates 22 painted with cathode paste 23, containing e.g. copper sulphide and selenium, and anodes 24 separated therefrom by the intermediate layer 27, which is preferably of such thickness, e.g. .005", that no appreciable potential drop occurs, are arranged in pairs between fire radiating and terminal plates 18, 14, 12, 15, 19, so as to be symmetrical about the central plate 15. Rectangular metal endplates 3, 4 are clamped against metal washers 25, 26 exterior to the plates 18, 19 by four tie bolts 5 .. 8 which surround the couples and have threaded ends screwing into the plate 3, but passing freely through holes in the plate 4 so that adjustment of pressure can be made by nuts 10 bearing against the outer face of plate 4. Insulating sleeves 11 surrounding the tie bolts prevent contact with couples or radiating plates. A.C. input terminals are mounted on extensions of the plates 14, 15, whilst posicive and negative output terminals are similarly mounted in the plates 12 and 18 or 19 respectively. Specification 360,960 is referred to.</p> |
