Fail-safe mechanism for electric arc furnaces

Details Fail-safe mechanism for electric arc furnaces Fail-safe mechanism for electric arc furnaces

1977-12-02

1979-02-20

Envall, Jr., R. N.

13 9R, H05B 7109

Patent

active

041408675

ABSTRACT:
An electric arc furnace has a plurality of electrodes each supported at one end of an arm, the other ends of which are each coupled to a column supported for vertical movement by means of a cable assembly. A fail-safe assembly is mounted adjacent the column and is coupled to the cable assembly. While tension is maintained in the support cable a linkage assembly normally restrains a biasing spring from moving a clamping wedge into engagement with the column to prevent vertical movement thereof. When tension is lost in the cable assembly the biasing spring is released to move the wedge into engagement with the column.

REFERENCES:
patent: 2148834 (1939-02-01), Payne
patent: 2290030 (1942-07-01), Brooke
patent: 2851287 (1958-09-01), Tangard
patent: 2899477 (1959-08-01), Cartoux

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