Switch device with operating modes of capacitive proximity and m

Details Switch device with operating modes of capacitive proximity and m Switch device with operating modes of capacitive proximity and m

1991-11-27

1993-12-14

Yusko, Donald J.

Coded data generation or conversion

Bodily actuated code generator

Including keyboard or keypad

341 34, 200600, H03K 1794, H03K 17975, H03K 1798

Patent

active

052707105

ABSTRACT:
A switch device with two modes of operation includes at least one switch comprising, carried by a substrate, two conductive lands and an electrically conductive elastic capsule in contact with one land and, in the unoperated condition, overlying the other land so as to be capable of being urged into contact with the latter. An electrical signal from a source is applied to the capsule. A circuit measures variations of the signal due to the proximity of an electrically conductive object. The device can be used to implement matrix keyboards combining the functions of a conventional keypad and a tactile pad.

REFERENCES:
patent: 4274752 (1981-06-01), Huber et al.
patent: 4862166 (1989-08-01), Yamakawa
Article, "Multistylus Keyboard for Manual Stylus Interactive Interface", Kambic et al, IBM Technical Disclosure Bulletin, vol. 12, No. 11, Apr. 1960, pp. 1863-1865.

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