Foot switch with a force-sensing resistor driven by a current so

Details Foot switch with a force-sensing resistor driven by a current so Foot switch with a force-sensing resistor driven by a current so

1993-12-15

1995-10-24

Scott, J. R.

Electrical resistors

Mechanically variable

Surfaces pressed together

200 6189, 200 865, 338153, H01C 1010, H01H 314

Patent

active

054613558

ABSTRACT:
A foot switch includes a base member having an upwardly facing surface, a force sensing resistor disposed on the surface and coupled electrically to a sensing circuit, and an actuating layer disposed on the force sensing resistor and the base member surface. The actuating layer has an elevated portion which is substantially centered over the force sensing resistor, the elevated portion having a convex upper surface which is a portion of a spherical surface. The sensing circuit includes a constant current source connected in series with the force sensing resistor between ground and a predetermined voltage.

REFERENCES:
patent: 4639710 (1987-01-01), McMillian
patent: 4970486 (1990-11-01), Gray et al.
patent: 4978177 (1990-12-01), Ingraham et al.

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