Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Patent
1999-08-05
2000-10-10
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
337 85, 337333, 337334, 337362, 337351, 200 4311, 200 21, 200179, 200273, H01H 2700, H01H 2706, H01H 1958
Patent
active
061305960
ABSTRACT:
This invention is related to an auto tripping multi-state key switch, comprising a switch housing being formed with at least one guide groove and one slideway at an inner side thereof; a first contact strip and a second contact strip both fastened to the switch housing, the first contact strip including a first contact and the second contact strip including a second contact; a bi-metallic strip having thereon a third contact and being connected to a connection plate include thereon a fourth contact; a key being provided with at least one first protrusion thereon for engaging the guide groove within the switch housing, the key having an end that is formed with a serrated edge; a rotary housing being provided with at least one second protrusion thereon for engaging the guide groove and the slideway allowing sliding movement of the rotary housing within the switch housing, the rotary housing having a top end being formed with a serrated edge that cooperates with the serrated edge at the bottom of the key, and the rotary housing having a bottom; and a first resilient member including an end that is fastened to the switch housing and another end that is in contact with the bottom of the rotary housing to bias the rotary housing towards the key in relation of the switch housing. This invention can automatically trip the switch to form a closed circuit while encountering current overload so as to ensure electrical safety.
REFERENCES:
patent: 3630306 (1971-12-01), Shur et al.
patent: 3650131 (1972-03-01), Eichenauer
patent: 3660624 (1972-05-01), Bell
patent: 3819887 (1974-06-01), Lipschutz
patent: 3826116 (1974-07-01), Messera et al.
patent: 3912886 (1975-10-01), Allen et al.
patent: 4099395 (1978-07-01), Garza
patent: 4198552 (1980-04-01), Tahara
patent: 4227056 (1980-10-01), Johnston et al.
patent: 4400954 (1983-08-01), Nakamoto et al.
patent: 4419546 (1983-12-01), Arthur
patent: 4558193 (1985-12-01), Test
patent: 4623763 (1986-11-01), Krause
patent: 4639562 (1987-01-01), Fredrickson
patent: 4748297 (1988-05-01), Sorenson et al.
patent: 4803314 (1989-02-01), Sorenson et al.
patent: 5235832 (1993-08-01), Lux et al.
patent: 5252791 (1993-10-01), Williams
patent: 5669489 (1997-09-01), Von Ende
patent: 6040535 (2000-03-01), Thalhammer
Picard Leo P.
Vortman Anatoly
LandOfFree
Auto tripping multi-state key 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 Auto tripping multi-state key switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auto tripping multi-state key switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2259891