Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated
Patent
1977-06-16
1979-04-10
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
Fusible element actuated
337290, 337293, H01H 8510
Patent
active
041491378
ABSTRACT:
A flat safety fuse having a carrier plate fabricated from a synthetic material on which is mounted a sheet metal member with at least one fusible arc. The fusible arc has an inner diameter equal to the distance between parallel inner edges of its supporting bases which are each attached to associated contact surfaces separated from each other by a slot. The sheet metal member is received in a recess provided in a surface of the carrier plate. Preferably, the sheet metal member is secured in the recess by pressure arcs and clamping portions provided on the sheet metal member and by raised clamping portions provided on the carrier plate. Preferably, the sheet metal member has a W-shaped configuration to provide two fusible arcs.
REFERENCES:
patent: 307639 (1884-11-01), Gilliland
patent: 949296 (1910-02-01), Dorff
patent: 2263752 (1941-11-01), Babler
patent: 3413586 (1968-11-01), Salzer
patent: 4031497 (1977-06-01), Ozawa
Broome Harold
Grote & Hartmann GmbH & Co. KG
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