GB1147582A - Multiple-break circuit interrupters with external rotary contact driving means and single chamber construction - Google Patents

Abstract

1,147,582. Vacuum switches; gas filled switches. WESTINGHOUSE ELECTRIC CORP. 26 July, 1967 [19 Oct., 1966], No. 34289/67. Heading H1N. A vacuum switch has two series connected contact pairs 5, 6 and 7, 8 operated simultaneously by a rotary shaft 16 outside of the evacuated envelope 2 and coupled to the movable contacts 5, 7 by members 10, 18 sealed to flexible bellows 12 in the wall 34 of the envelope. Each fixed contact member 20, 21 carries a screen 25, 26 protecting the outer insulating wall of the envelope while each movable contact member 10, 18 carries a screen 32 protecting the bellows. Further screens (30, 31) are attached to the flat ends of the cylindrical envelope (Fig. 2, not shown). The contact pairs may be used in parallel if required by making a connection to the operating shaft 16 (Fig. 3, not shown). In a modification (Fig. 4, not shown) the contact members 10, 18 are cranked outside the envelope so that deformation of the bellows is more nearly rectilinear; alternatively (Fig. 7, not shown) pin-and-slot couplings (86, 86) may be introduced between the shaft 16 and the contact members which are guided for rectilinear movement only. In another modification (Fig. 5, not shown) only a single bellows is used, a single interconnecting member carrying both movable contacts; four series connected pairs can be similarly arranged (Fig. 6, not shown). The envelope may alternatively be filled with SF 6 .