GB1425611A - Power switches - Google Patents

Abstract

1425611 Arcing electrode and switching contact units SPRECHER & SCHUH AG 29 May 1973 [22 June 1972] 25343/73 Heading H1N The opposed contacts 59, 63, 64 in Figs. 9 and 11 respectively of a power switch, preferably of the vacuum type, have rigidly attached thereto opposed arcing electrode assemblies 50 and 65, 66 respectively each consisting of spaced metal plates extending parallel to the direction of relative movement of the contacts, the edges of the plates taking the roots of the arc until extinction on opposed edges, the spaces between the plates of each electrode assembly being not less than the thickness of the plates. The contacts may be annular with radial electrode assembly plates (Figs. 7. and 8 not shown) or may comprise U-shaped members defining separated contact surfaces with intermediately disposed parallel plates (Fig. 9). The Fig. 11 embodiment has contacts shaped to provide a loop path for current and the arcing electrodes (which overlap when the switch is closed) have a divergent shape which extends the current loop when the switch contacts are opened. Punched protuberances 51, Figs. 9, and 67, Fig 11, maintain the spacing of the plates. The vacuum switch with stationary arcing electrodes disclosed in Specification 1,363,010 is repeated with reference to Figures 1-6 which are common to both Specifications.