Transparent keyboard switch and array

Details Transparent keyboard switch and array Transparent keyboard switch and array

1975-05-19

1977-04-12

Habecker, Thomas B.

Communications: electrical

Audible indication

Percussion-type sound producer

340324M, 340337, G08C 100

Patent

active

040178480

ABSTRACT:
A transparent keyboard switch which is suitable for use in switch arrays is disclosed. Switch nomenclature may be positioned behind the switch and viewed from in front of the switch. The transparent switch comprises a relatively rigid electrically insulating transparent substrate having a "lower" electrode disposed on the upper surface thereof and a relatively flexible transparent film having an "upper" electrode disposed on the underside thereof and a layer of electrically insulating fluid spacing the upper electrode from the lower electrode. The switch is rendered conductive by pressing on the flexible film to locally displace the electrically insulating fluid from between upper and lower switch electrodes and bring them into contact, thereby making the switch a closed circuit.

REFERENCES:
patent: 3207905 (1965-09-01), Brag
patent: 3495232 (1970-02-01), Wagner
patent: 3560675 (1971-02-01), Krakinowski
patent: 3757322 (1973-09-01), Barkan
patent: 3772685 (1973-11-01), Masa
patent: 3956745 (1976-05-01), Ellis

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