Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With longitudinally expansible solid element
Patent
1997-05-05
2000-07-04
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With longitudinally expansible solid element
337140, 429 61, 429 62, 429150, H01H 3746, H01M 200, H01M 602
Patent
active
060845015
ABSTRACT:
A self-contained unitary thermal cutoff switch assembly having a hollow sealed switch housing formed by a collector and a lid that serve as the switch contacts. Separating the collector and the lid is a plastic insulating liner that generally follows the inside contour of the collector. The lid is held in place at the open end of the collector by folding over the top lip of the collector which will, at the same time, fold over the insulator in a U-shape about the edge of the lid and hold and insulate the lid in a spaced relationship with the collector. A shape memory collector formed as a straight piece of wire is located between the lid and the side of the collector opposite the lid. The wire is held in alignment by an opening through the insulator which supports an end portion of the wire adjacent to the bottom of the collector. When the thermal cutoff is subjected to a temperature equal to or greater than the recovery temperature of the shape memory conductor, the conductor will change to its recovered shape and open the circuit. If a high resistance circuit through the open thermal cutoff switch is required, the plastic insulator may be molded of a partially conductive compound by using a mixture such as polypropylene and carbon black.
REFERENCES:
patent: 4035552 (1977-07-01), Epstein
patent: 4855195 (1989-08-01), Georgopoulos et al.
patent: 4973936 (1990-11-01), Dimpault-Darcy et al.
patent: 4975341 (1990-12-01), Tucholski et al.
patent: 4992339 (1991-02-01), Georgopoulos
patent: 5188909 (1993-02-01), Pedicini
patent: 5376467 (1994-12-01), Abe et al.
patent: 5747187 (1998-05-01), Byon
patent: 5766793 (1998-06-01), Kameishi et al.
patent: 5879832 (1999-03-01), Vu et al.
Picard Leo P.
Therm-O-Disc Incorporated
Vortman Anatoly
LandOfFree
Thermal cutoff 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 cutoff switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal cutoff switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1490285