Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With longitudinally expansible solid element
Patent
1995-02-07
1997-03-18
Picard, Leo P.
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With longitudinally expansible solid element
337390, 337391, 337407, 29623, H01H 3746, H01H 3776, H01H 3760, H01H 6902
Patent
active
056126620
ABSTRACT:
A thermal fuse includes a leaf spring formed of a narrow sheet metal strip. The leaf spring has ends and at least two contact points at the ends. At least one of the contact points is a soldering point for connection with corresponding circuit contacts of a circuit substrate. The leaf spring has at least one spring arm interconnecting the contact points. The spring arm has a roof-shaped deformation in the vicinity of one contact point. The spring arm has a flat and elongated spring segment with a transition adjoining the deformation and a transition extending to the other contact point. The spring segment is bending resistant in the vicinities of the transitions, for transforming a compressive deformation applied to the roof-shaped deformation into a lateral movement and into an arching of the spring segment, with both ends of the leaf spring attached to the circuit substrate without pretensioning. A method for activation of the thermal fuse includes placing the contact points of the leaf springs free of tension on the circuit contacts, soldering the contact points to the circuit contacts, and compressively deforming the roof-shaped deformation after the soldering for creating an arching of the spring segment and a desired pretensioning.
REFERENCES:
patent: 2790049 (1957-04-01), McAlister
patent: 3198914 (1965-08-01), Baran
patent: 3569892 (1971-03-01), Ripamonti
patent: 3613040 (1971-10-01), Fluder et al.
patent: 3763454 (1973-10-01), Zandonatti
patent: 3827014 (1974-07-01), Wehl
patent: 4433231 (1984-02-01), Balchunas
patent: 4536641 (1985-08-01), Chan
Drekmeier Karl G.
Winter Gerhard
Greenberg Laurence A.
Lerner Herbert L.
Picard Leo P.
Ryan Stephen T.
Siemens Aktiengesellschaft
LandOfFree
Thermal fuse and method for its activation 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 fuse and method for its activation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal fuse and method for its activation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1708722