Solid state touch switch

Details Solid state touch switch Solid state touch switch

1975-11-03

1977-12-13

Schaefer, Robert K.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

58 23BA, 200159R, H03K 1300

Patent

active

040631117

ABSTRACT:
A solid state touch switch is provided, in which, during use, a portion of the user's body, such as a finger, forms a portion of an electronic circuit to change the state of a solid state electronic device and thereby actuate the solid state touch switch. Alternative embodiments of the invention contemplate the use of various solid state electronic devices including metal-oxide semiconductor field-effect transistors (MOSFET'S) junction field effect transistors, silicon controlled rectifiers and NPN transistors. One application of the solid state touch switch is in a digital watch in which a user touches a contact pad located on the watch case and thereby turns the digital watch on for the display of time and date signals.

REFERENCES:
patent: 3737670 (1973-06-01), Larson
patent: 3742699 (1973-07-01), Bergey
patent: 3805086 (1974-04-01), Larson et al.
patent: 3862432 (1975-01-01), Larson
patent: 3879618 (1975-04-01), Larson
patent: 3909625 (1975-09-01), Colglazier et al.
patent: 3983690 (1976-10-01), McClintock
patent: 3991329 (1976-11-01), Inasa et al.
"Build the Touch Control", Popular Electronics, 4/1969, L. G. Striggow, pp. 57-58.
"Electronics Experimenters Circuit Manual;" 1971, pp. 141-145.
IBM Technical Disclosure Bulletin, 4/71, "Push Button Switch w
o Moving Parts".

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