Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1976-11-11
1978-07-25
Harris, George
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337248, H01H 7120
Patent
active
041032705
ABSTRACT:
A sealing arrangement for a high voltage fuse comprises a round metal plate that has a center portion that has been machined to reduce the thickness of the center portion. The center portion of the metal plate is then subjected to a coining or pressing operation to further reduce the thickness of the center portion and also to increase the hardness and smoothness of the center portion so that the center portion can be reliably punctured during fuse operation. The metal plate is then sealed over the end of the fuse by folding the edge of a metal conducting tube over the edge of the metal plate. The peripheral portion of the metal plate serves as a stop to prevent the expulsion of fuse parts when the fuse operates.
REFERENCES:
patent: 2846544 (1958-08-01), Wood
patent: 3234349 (1966-02-01), Bronikowski
patent: 3374329 (1968-03-01), Bronikowski
patent: 3614700 (1971-10-01), Beard
Harris George
S & C Electric Company
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