Surface mount fusing device

Details Surface mount fusing device Surface mount fusing device

1996-11-01

1998-08-11

Phillips, Michael W.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337141, 337405, 337407, H01H 8502

Patent

active

057932743

ABSTRACT:
A thermal fuse device for over-current protection includes a fusing element comprising a conductive strip having a fulcrum point between first and second ends. The fuse strip is connected to first and second terminal pads on a substrate by a first solder joint between the first end and the first terminal pad, and a second solder joint between the fulcrum point and the second terminal pad. The second end of the strip is resiliently pressed against the interior surface of a housing that holds the substrate. The inwardly-directed pressure applied to the second end of the fuse strip by the housing is resisted by the first and second solder joints, whereby the fuse strip remains immobile. A resistive element on the substrate generates heat in response to the flow of current. When the current is greater than a predetermined current value, the generated heat melts the first and second solder joints, thereby allowing the fuse strip to pivot about its fulcrum point in response to the pressure applied to its second end by the housing, and thereby causing the first end of the fuse strip to separate from the first terminal pad to open the circuit. In a preferred embodiment, the housing holds two or more of the substrates in a substantially parallel relationship to each other and in a substantially perpendicular relationship to the circuit board, whereby the substrates can be installed on the board in an upright, surface mount orientation.

REFERENCES:
patent: 3763454 (1973-10-01), Zandonatti
patent: 3995246 (1976-11-01), Morgan
patent: 4494104 (1985-01-01), Holmes
patent: 4533896 (1985-08-01), Belopolsky
patent: 4879805 (1989-11-01), Tomkinson et al.
patent: 5084691 (1992-01-01), Lester et al.
patent: 5097247 (1992-03-01), Doerrwaechter
patent: 5192937 (1993-03-01), Lee
patent: 5193044 (1993-03-01), Czerwiec
patent: 5280262 (1994-01-01), Fischer
patent: 5363083 (1994-11-01), Fischer
patent: 5612662 (1997-03-01), Drekmeier et al.

Affiliated with

Also associated with

Rating

Surface mount fusing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface mount fusing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface mount fusing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-392903