Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With fusible – combustible or explosive material
Patent
1975-03-03
1977-10-25
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With fusible, combustible or explosive material
169 42, H01H 3776
Patent
active
040558290
ABSTRACT:
A pair of substantially flat rectangular fusible links is constructed from progressive dies by partially cutting them from sheet metal stock as blanks, flanging edges on the parts and including the forming of triangular camming surfaces on such flanges, and then shearing the parts from the stock. Thereafter, the links are fluxed and soldered together and are held in internested complementary relation. It is characteristic of the links that there are no voids or discontinuities in the joined surfaces and into which flux will not flow; the interfacing triangular cam surfaces insure a clean breaking apart of the links once the eutectic temperature is reached because any longitudinal sliding movement of the links biases them laterally apart under the camming action to insure a complete break-away of the confronting soldered surfaces.
REFERENCES:
patent: 911162 (1909-02-01), Rockwood
patent: 1084710 (1914-01-01), Rockwood
patent: 1092562 (1914-04-01), Cotton
patent: 1613453 (1927-01-01), Grimshaw
Broome Harold
Elsie Manufacturing Company
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