Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With bimetallic element
Patent
1985-11-04
1987-02-03
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With bimetallic element
337381, 310 68C, H01H 3704, H01H 3752
Patent
active
046411216
ABSTRACT:
A sealed thermostatic electric switch has a heat responsive thermostatic element disposed in good heat transfer relationship with the closed end of a heat conductive cup shaped member. The side wall of the cup shaped member extends upwardly from the closed end and is spaced a selected distance from the housing of the switch. A plastic sleeve has one end tightly received over the side wall and adhesively secured thereto and another end closed except for a tubular portion extending therefrom with electrical leads of the switch extending from the switch through and beyond the tubular portion. The tubular portion has opposed wall portions which are in contact and coalesced with each other and with the aligned plastic insulation of the leads to effectively seal the tubular portion of the sleeve.
A mounting plate is welded to the bottom outer surface of the cup shaped member which interfits with a strap or clip for attachment to a surface whose temperature is to be monitored. In one embodiment a clip is provided with tabs receivable in slots formed between the mounting plate and the cup shaped member. The clip has downwardly depending opposed legs adapted to springingly receive therebetween a tubular conduit whose temperature is to be monitored. In other embodiments the mounting strap extends along the bottom surface of the cup shaped member and is captured there by the mounting plate.
REFERENCES:
patent: 2907851 (1956-10-01), Moorhead et al.
patent: 3215873 (1965-11-01), Kruger et al.
patent: 4308517 (1981-12-01), Peterson
patent: 4349806 (1982-09-01), Boulanger
patent: 4446450 (1984-05-01), Boulanger et al.
patent: 4446451 (1984-05-01), Boulanger
Broome Harold
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
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