Communications: electrical – Digital comparator systems
Patent
1978-06-12
1979-02-27
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
73141A, 73432R, G01L 516
Patent
active
041421752
ABSTRACT:
A pressure sensing device having applicability as a simple pressure sensor and which is particularly adapted for use as a pen in a Signature Verification System, said device including a unique mounting structure for the pressure sensing stylus by flexible support means mounted on a substantially rigid base. The support means has a pressure sensing element mounted thereon. The flexible support means comprises two spaced members so disposed that their deflections and the output of the pressure sensing element are substantially independent of the angle of pressure on the stylus. In the special purpose embodiment useful for Signature Verification the stylus comprises a pen and the device further includes two orthogonally disposed accelerometers for sensing accelerations of said pen during the writing of a signature.
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patent: 3621720 (1971-11-01), Clark
patent: 3792240 (1974-02-01), Stumpo
patent: 3808408 (1974-04-01), Given et al.
patent: 3835453 (1974-09-01), Narayanan
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patent: 3915015 (1975-10-01), Crane et al.
patent: 4006628 (1977-02-01), St. Jacques
Herbst Noel M.
Liu Chao N.
Panissidi Hugo A.
Boudreau Leo H.
International Business Machines - Corporation
Schlemmer, Jr. Roy R.
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