Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1996-03-20
1998-08-04
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337142, 337161, 337166, 337227, 337293, 337415, 29623, H01H 8504
Patent
active
057900078
ABSTRACT:
A board fuse includes an insulating board having a through-hole window in the middle of the insulating board and fusible elements laid over the insulating board. Further, the fusible elements are continuous metal wires substantially equal in cross section. The fusible elements are uniform and accurate in cross section and accurate in current capacity. The fusible elements extend across the window in such a manner that, at the window, they are not in contact with the insulating board. Hence, when heat is generated in any one of the fusible elements by electric current, the heat generated at the window is not absorbed by the insulating board and is increased as required, thus blowing the fusible element accurately. Accordingly, the board fuse is free from the difficulties caused by the heat generation, that is, the production of a bad smell, at worst the production of white smoke.
REFERENCES:
patent: 4037318 (1977-07-01), Burkley et al.
patent: 4149137 (1979-04-01), Konnemann
Gandhi Jayprakash N.
Picard Leo P.
Sumitomo Wiring Systems Ltd.
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