Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With fusible – combustible or explosive material
Patent
1996-05-21
1997-07-29
Phillips, Michael W.
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With fusible, combustible or explosive material
337401, 337404, H01H 3776
Patent
active
056525621
ABSTRACT:
A thermally fused resistor arrangement wherein a resistor is electrically connected at one end to a first resistor terminal and at an opposite end to a second resistor terminal. A solder loop is provided to make the electrical connection between one end of the resistor and its corresponding resistor terminal. A portion of the solder loop is positioned in contact with an electrically insulated portion of the surface of the resistor, preferably corresponding to the hot spot of the resistor, and a thermally conductive medium is provided to thermally and mechanically attach the solder loop to the electrically insulated portion of the resistor surface. The portion of the solder loop thermally attached to the resistor is operable to melt when the temperature of the resistor increases to within a predefined temperature range, thereby electrically disconnecting the end of the resistor from its corresponding resistor terminal.
REFERENCES:
patent: 3609621 (1971-09-01), Danesi
patent: 3638083 (1972-01-01), Dornfeld et al.
patent: 3931602 (1976-01-01), Plasko
patent: 4494104 (1985-01-01), Holmes
patent: 4533896 (1985-08-01), Belopolsky
patent: 4626818 (1986-12-01), Hilgers
patent: 5084691 (1992-01-01), Lester et al.
patent: 5097247 (1992-03-01), Doerrwaechter
patent: 5192940 (1993-03-01), Yajima et al.
Gandhi Jayprakash N.
Phillips Michael W.
Spectrol Electronics Corporation
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