Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1976-04-30
1977-07-05
Hickey, Robert J.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337166, 337209, H01H 8504, H01H 8508
Patent
active
040343294
ABSTRACT:
A time-delay fuse is provided comprising a glass or ceramic tube sealed at both ends with a sealing means such as, e.g., ferrules. The fuse also comprises a generally cylindrical core member of poor heat conductivity (e.g., porous sintered mixture of alumina and clay), and a fusible high melting wire element wound densely on the middle region of said core member, thence sparsely toward the terminals and again densely at the ends where the fusible wire element is soldered by a high-melting solder element.
REFERENCES:
patent: 2773960 (1956-12-01), Sundt et al.
patent: 3706951 (1972-12-01), Mikulecky
Arikawa Hiroo
Maruo Masaya
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