Keyboard

Details Keyboard Keyboard

1981-05-22

1982-12-28

Albritton, C. L.

Electrical resistors

Mechanically variable

Musical instrument playing key actuated

84DIG7, 338 32H, H01C 1000

Patent

active

043664636

ABSTRACT:
A data entry device durable enough to withstand the rigors of industrial type usage in which the electronic components are isolated from the external environment is described. The device comprises a molded elastomer keyboard matrix with thin stainless steel keypads. Embedded into the elastomer beneath the keys are small magnets. Solid state Hall-effect switches are mounted at a predetermined distance from the magnets and are separated from them by a magnetically permeable stainless steel sheet which forms part of the enclosure isolating the electronic components from the environment. Depressing one of the keys on the elastomer matrix moves its associated magnet toward the respective Hall-effect device, causing a change in current which may be sensed by other electronic components. Because of the elastomer material, the keys spring back when released.

REFERENCES:
patent: 3488613 (1970-01-01), Marchetti
patent: 3617600 (1971-11-01), Ohno
patent: 3858145 (1974-12-01), Sulich et al.
patent: 3954085 (1976-05-01), Nassimbene

Affiliated with

Also associated with

Rating

Keyboard does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Keyboard, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Keyboard will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1339727