Horn membrane switch with rupturable strain relief bridging conn

Details Horn membrane switch with rupturable strain relief bridging conn Horn membrane switch with rupturable strain relief bridging conn

1996-11-19

1998-03-03

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Steering wheel, shaft or column mounted

200 6108, 280731, H01H 900, H01H 1370, B60R 2122

Patent

active

057238340

ABSTRACT:
An improved membrane horn switch having a first main switch section and a second main switch section connected by spaced-apart, relatively narrow first and second bridge members which are rupturable by a force created by an inflating airbag cushion. Each bridge member has a conductive coating in the form of two spaced-apart parallel strips which resist the propagation of stress cracks caused by the bending and twisting of horn actuation, and provide redundancy upon one of the two conductive strips being severed by a stress crack. Improved membrane horn switches having strain relieving bridge members are also provided. Each strain relieving bridge member, in addition to having two spaced-apart conductive strips, also forms a non-straight path between the first main switch section and the second main switch section. The non-straight paths of the strain relieving bridge members allow extra slack and leeway between the first and the second main switch sections of the horn switch, reducing stress on the bridge members. An improved membrane horn switch having a combined bridge member is also provided, and improved membrane horn switches having a combined strain relieving bridge member with a non-straight path are also provided.

REFERENCES:
patent: 3668337 (1972-06-01), Sinclair
patent: 3772776 (1973-11-01), Weisenburger
patent: 4525606 (1985-06-01), Sado
patent: 4885430 (1989-12-01), Kinser, Jr. et al.
patent: 5198629 (1993-03-01), Hayashi et al.
patent: 5309135 (1994-05-01), Landford
patent: 5399819 (1995-03-01), Lang et al.
patent: 5576684 (1996-11-01), Langford
patent: 5577767 (1996-11-01), Nemoto
patent: 5585606 (1996-12-01), Ricks
patent: 5639114 (1997-06-01), Margetak et al.

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