Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Patent
1999-03-25
2000-11-07
Sherry, Michael J.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
337333, 337365, H02H 504
Patent
active
06144541&
ABSTRACT:
A heat-sensitive plate is substantially rectangular, has its one end portion fixed to a second terminal plate and has a movable contact mounted on the other end portion. The one side of the heat-sensitive plate facing a fixed contact forms a high expansion coefficient side and the other side a low expansion coefficient side. The heat-sensitive plate has a protrusion protrusively provided on the low expansion coefficient side centrally thereof by press working with a small outer diameter and a large curvature, and an annular press-thinned portion formed by press working concentrically with the protrusion and having an inner diameter appreciably larger than the outer diameter of the protrusion. In the initial state the heat-sensitive plate is held curved in a funnel shape protrusive about the protrusion on the low expansion coefficient side.
REFERENCES:
patent: 5023744 (1991-06-01), Hofsass
patent: 5337036 (1994-08-01), Kuczynski
patent: 5615072 (1997-03-01), Hofsass et al.
patent: 5745022 (1998-04-01), Becher et al.
patent: 5894259 (1999-04-01), Kolberg et al.
Hashimoto Eiichi
Kato Tatsuo
Hosiden Corporation
Sherry Michael J.
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