Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With bimetallic element
Patent
1999-04-07
2000-11-28
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With bimetallic element
337354, 337380, 337 89, H01H 3774, H01H 6100, H01H 3704
Patent
active
061541176
ABSTRACT:
A thermal switch includes a metal header plate having two through holes, two terminals inserted through and airtightly fixed in the through holes of the header plate, a metal housing including a cylindrical portion having an open end and a generally shallow dish-shaped bottom, the open end being welded to the header plate so that the metal housing and the head plate constitute a hermetic housing, and a thermally responsive element formed into the shape of a shallow dish and disposed on the bottom of the metal housing the thermally responsive element reversing its curvature at a first temperature with snap action and re-reversing its curvature at a second temperature with snap action to return to its former state. The metal housing has a N thickness set to a range of 1/60 to 1/20 of a diameter of the cylindrical portion and a length of the cylindrical portion is set to a value equal to one half as large as its diameter or above, so that heat conduction through the bottom of the metal housing to the thermally responsive element and heat conduction from the housing bottom side through the cylindrical portion of the housing toward the header plate are regulated so that a temperature rise rate of the thermally responsive element is adjusted.
REFERENCES:
patent: 3657618 (1972-04-01), Ori et al.
patent: 4114127 (1978-09-01), Pejouhy
patent: 4266211 (1981-05-01), Ulanet
patent: 4287499 (1981-09-01), Pejouhy
patent: 4389630 (1983-06-01), Ubukata et al.
patent: 4472705 (1984-09-01), Carlson
patent: 5107241 (1992-04-01), Ubukata et al.
patent: 5121095 (1992-06-01), Ubakata et al.
patent: 5229740 (1993-07-01), Mizutani et al.
patent: 5939970 (1999-08-01), Tsuji et al.
Koseki Hideki
Sato Shigemi
Picard Leo P.
Ubukata Industries Co., Ltd.
Vortman Anatoly
LandOfFree
Thermal switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermal switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1729956