Transparent switch having fine line conductors

Details Transparent switch having fine line conductors Transparent switch having fine line conductors

1982-12-23

1984-05-15

Shepperd, John W.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 5A, 200313, H01H 312

Patent

active

044490232

ABSTRACT:
A membrane switch assembly for mounting on a cathode ray tube is disclosed. The assembly is comprised of two layers of transparent film having spaced-apart parallel double hairline conductors deposited on the internal surfaces of both layers. The internal surfaces are separated by an insulating ultraviolet curable polymer spacer applied in parallel strips over the conductors, the spacer being discontinuous at the switch sites. The conductors cross and are normally spaced from each other at the switch sites so that when the switch is closed by applying force to bring the two layers of conductors together, the electrical circuit can be completed at any one of four locations. This ensures completion of the electrical circuit even if force has been applied at the outer edge of the switch site.

REFERENCES:
patent: 3886335 (1975-05-01), Hendricks
patent: 4066853 (1978-01-01), Zenk
patent: 4066855 (1978-01-01), Zenk
patent: 4143253 (1979-03-01), Wagner et al.
patent: 4360716 (1982-11-01), Fiorella

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