Tactile element and keyboard including the tactile element

Details Tactile element and keyboard including the tactile element Tactile element and keyboard including the tactile element

1980-01-31

1981-12-22

Truhe, J. V.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200275, 200292, H01H 1314

Patent

active

043072682

ABSTRACT:
A tactile snap-action element for use in keyboards, the element comprising an arcuately shaped invertible first dome and a second dome shaped actuating protrusion extending from the invertible second dome, the actuating dome protrusion being integral with the invertible dome and being non-invertible. The element is operated by an actuation force which acts directly or indirectly through the non-inverting second dome to invert the first dome and to provide tactile feedback. The keyboard includes a plurality of keys, each key comprising an element, a conductive circuit associated with the first dome and movable with the inversion of the first dome to electrically contact a second conductive circuit associated with the element.

REFERENCES:
patent: 3898421 (1975-08-01), Suzumura
patent: 4194105 (1980-03-01), Hodges

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