Raymond W Loris

US Patent:

41591852, Jun 26, 1979

Filed:

Nov 11, 1976

Appl. No.:

5/740930

Inventors:

Henry W. Scherer - Mt. Prospect IL
Raymond W. Loris - Des Plaines IL

Assignee:

S&C Electric Company - Chicago IL

International Classification:

F16B 300

US Classification:

403 13

Abstract:

A high voltage dropout type expulsion fuse has a lower trunnion assembly mounted on one end and a fuse release assembly mounted on the other end thereof. To assure the proper positional relationship between the trunnion assembly and the fuse release assembly, the fuse housing has a locating boss at one end adapted to engage and position the trunnion assembly and a positioning slot formed in the other end adapted to engage and position the fuse release assembly. The locating slot and boss must be properly positioned with respect to one another to assure the proper positional relationship of the trunnion assembly and the fuse release assembly. The lower locating boss is integrally formed on the wall of a metallic ferrule by extruding a portion of the wall into the cavity of a die to form an integral locating boss. This integral boss cannot cause the leakage of moisture into the interior of the fuse. The boss is formed by first determining the desired location of the boss by measuring the correct positional relationship with respect to the locating slot, positioning a die having a cavity at a position where the boss is to be located at the exterior of the ferrule wall, and extruding a portion of the wall of the ferrule into the cavity to form the locating boss.