Normally closed membrane switch and method of manufacture

Details Normally closed membrane switch and method of manufacture Normally closed membrane switch and method of manufacture

1998-04-27

2000-02-22

Scott, J. R.

Electricity: circuit makers and breakers

Solid contact

Membrane type

H01H 110, H01H 1350

Patent

active

060282789

ABSTRACT:
A normally closed membrane switch is presented which includes a substrate having a cut out area or aperture, a pair of conductive pads located on opposite sides of the aperture, a conductive bridge positioned across the aperture and connecting the pair of conductive pads, and a pill member located on the conductive bridge. The normally closed switch is opened by applying a downward force on the pill member which causes the conductive bridge to flex below the conductive pads. The conductive bridge then pivots against the edges of the substrate which forms the aperture thereby lifting the ends of the conductive bridge off of the conductive pads and opening the switch.

REFERENCES:
patent: 4476355 (1984-10-01), Mital
patent: 4618754 (1986-10-01), Gross
patent: 4703139 (1987-10-01), Dunlap
patent: 4771139 (1988-09-01), DeSmet
patent: 4795861 (1989-01-01), O'Rourke
patent: 4916275 (1990-04-01), Almond
patent: 4920342 (1990-04-01), Gratke
patent: 5791459 (1998-08-01), Hester

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