Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With fusible – combustible or explosive material
Patent
1974-10-04
1976-04-20
Harris, George
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With fusible, combustible or explosive material
337408, H01H 3776
Patent
active
039522741
ABSTRACT:
A thermally actuatable switch having a housing provided with a pair of leads, one of the leads having a contact and the other of the leads having a spring blade for making contact with the contact to complete an electrical circuit between the leads. The spring blade has a normal bias to move the same out of contact with the contact to open the circuit. A temperature sensitive member is carried by the housing and is adapted to collapse when the same is at a predetermined temperature. A biasing member is operatively associated with the temperature sensitive member and the spring blade to resiliently hold the spring blade in contact with the contact as long as the temperature sensitive member is in an uncollapsed condition thereof whereby the biasing member substantially compensates for any shrinkage and/or deterioration of the temperature sensitive member during its uncollapsed life and thus maintains the spring blade in contact with the contact.
REFERENCES:
patent: 2934628 (1960-04-01), Massar et al.
patent: 3180958 (1965-04-01), Merrill
patent: 3291945 (1966-12-01), Merrill et al.
patent: 3727164 (1973-04-01), Cartier et al.
Harris George
Micro Devices Corporation
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