Thermal protector

Details Thermal protector Thermal protector

1999-04-06

2000-10-03

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337377, 337389, 337390, H01H 3754, H01H 3752

Patent

active

061279137

ABSTRACT:
A bimetal 40 is secured at a holding portion 40b to a fixed pin 52 and a snap portion 40a is supported by a support portion 12a. The free end 40a" of the snap portion 40a comes in contact with a movable contact plate 30 to thereby rock the plate 30. The displacement of the snap portion 40a is restricted at a boundary end portion 40a' by the holding portion 40b. Due to this, when the thermal protector carries out a snap action (or is reversed), the snap portion 40a is rocked like a lever around the support portion 12a supporting the snap portion 40a, and the free end 40a" of the snap portion 40a is greatly displaced. Thus, the travelling distance by which the movable contact 32 travels when the movable contact plate 30 is rocked, can be increased. This can prevent a delay in snap.

REFERENCES:
patent: 2189996 (1940-02-01), Riche
patent: 3670283 (1972-06-01), Holden
patent: 3871939 (1975-03-01), Woods
patent: 3946352 (1976-03-01), Nelson
patent: 4032180 (1977-06-01), Pohl
patent: 4088976 (1978-05-01), Bell
patent: 4399423 (1983-08-01), Nield
patent: 4414519 (1983-11-01), Anderson, III et al.
patent: 4476452 (1984-10-01), D'Entremont
patent: 4554525 (1985-11-01), Bayer
patent: 4701824 (1987-10-01), Beggs et al.
patent: 4706152 (1987-11-01), DeFilippis et al.
patent: 4713717 (1987-12-01), Pejouhy et al.
patent: 4720759 (1988-01-01), Tabei
patent: 4862133 (1989-08-01), Tabei
patent: 5182538 (1993-01-01), Muller
patent: 5196820 (1993-03-01), Ubukata
patent: 5309131 (1994-05-01), Hofsass
patent: 5337036 (1994-08-01), Kuczynski
patent: 5428336 (1995-06-01), Smith et al.
Patent Abstracts of Japan, 04174925, dated Jun. 23, 1992, 1 page.
Patent Abstracts of Japan, 04174926, dated Jun. 23, 1992, 1 page.
Patent Abstracts of Japan, 05074295, dated Mar. 26, 1993, 1 page.
Patent Abstracts of Japan, 05074308, dated Mar. 26, 1993, 1 page.
Patent Abstracts of Japan, 05128948, dated May 25, 1993, 1 page.
Patent Abstracts of Japan, 05205586, dated Aug. 13, 1993, 1 page.
Patent Abstracts of Japan, 06084438, dated Mar. 25, 1994, 1 page.
Patent Abstracts of Japan, 06084439, dated Mar. 25, 1994, 1 page.
Patent Abstracts of Japan, 06119858, dated Apr. 28, 1994, 1 page.
Patent Abstracts of Japan, 08022757, dated Jan. 23, 1996, 1 page.

Affiliated with

Also associated with

Rating

Thermal protector 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 protector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal protector will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-199745