GB765991A - Improvements relating to electrode supporting means for electric furnaces - Google Patents

Abstract

765,991. Furnace electrode holders. ELEKTROKEMISK AKTIESELSKAP. March 24, 1955 [March 31, 1954], No. 8653/55. Addition to 700,218. Class 39(3) In a furnace electrode support comprising a main electrode clamp 2 supplying current to the electrode 1 and when loosened allowing it to slide down and having a stop ring 5 clamped to the electrode and moving down therewith until it reaches a fixed stop and so prevents further downward movement of the electrode as in the parent Specification, the stop ring 5 comprises one or more flexible bags or diaphragms 7 to which fluid pressure is applied by remote control means outside the furnace to cause the ring 5 to grip the electrode, or, on release of pressure, to release it. The stop ring 5 carrying an outer ring 6 is placed above the electrode suspension casing 3, and it is not necessary to enclose the rubber bags or diaphragms with water-cooled shields. The suspension casing 3 is supported by a suspension frame 4, which forms the fixed stop, and springs 9 are interposed between the frame 4 and ring 5 to exert a braking thrust on the downward movement of the stop ring and to return it to its upper position when released. Alternatively hydraulic or pneumatic pistons may act as a brake and to return the ring 5 to its upper position. Specification 754,641 is referred to.