Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With fusible – combustible or explosive material
Patent
1979-06-27
1981-06-30
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With fusible, combustible or explosive material
337407, H01H 3776
Patent
active
042765323
ABSTRACT:
This disclosure relates to a heat fuse for use in electrical and electronic equipment in which a contact plate having a diameter smaller than the internal diameter of a metallic casing is adapted to positively contact under pressure the inner peripheral surface of the metallic casing by the component force produced at the forward end of a second compression spring and applied in a direction perpendicular to the direction of the compression force. The contact plate can be pressed against the peripheral inner surface of the metallic casing with a sufficiently large contact pressure by the component force of the second compression spring, while the friction caused by the sliding movement of the contact plate with respect to the casing during functioning is extremely small owing to the diameter of the contact plate made smaller than the internal diameter of the metallic casing.
REFERENCES:
patent: 3309481 (1967-03-01), Merrill
patent: 3778742 (1973-12-01), Merrill
patent: 4060787 (1977-11-01), Budnik
Broome Harold
Murata Manufacturing Co. Ltd.
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