Communications: electrical – Digital comparator systems
Patent
1976-01-12
1976-11-09
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
73432R, 336130, G06K 900
Patent
active
039914020
ABSTRACT:
A pressure transducing apparatus which is responsive to the pressure which is exerted by an individual when he signs his signature for generating an A.C. electrical signal representative of the characteristic variations in pressure produced when an individual signs his signature for use in a signature identification or verification system. The pressure transducing platen includes a writing surface means which is positioned for receiving an individual's signature and has attached thereto a rod member having an upper non-magnetic portion rigidly attached to the bottom of said writing surface means and a lower magnetic portion which moves along a vertical axis in response to the pressure variations exerted on the writing surface. Three coils, each of which has a central hole therein, are positioned so that the magnetic portion of the rod resides within at least a portion of the central hole of each of the coils for vertical movement therein. The second or middle coil is driven by an oscillator and the first and third coils are connected in opposition to each other such that changes in the position of the magnetic portion of the rod within the central openings of the three coils will result in a differential A.C. electrical signal representative of the characteristic variations in pressure produced at the writing surface when an individual signs his signature.
REFERENCES:
patent: 3170987 (1965-02-01), O'Brien
patent: 3181055 (1965-04-01), Bischof
patent: 3199078 (1965-08-01), Gaffney, Jr. et al.
patent: 3480911 (1969-11-01), Danna
patent: 3496779 (1970-02-01), Peters
patent: 3618019 (1971-11-01), Nemirovsky et al.
patent: 3621720 (1971-11-01), Clark
patent: 3781798 (1973-12-01), Hinks
Boudreau Leo H.
Burroughs Corporation
Fissell, Jr. Carl
Peterson Kevin R.
Uren Edwin W.
LandOfFree
Pressure transducing platen for use in a signature identificatio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressure transducing platen for use in a signature identificatio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure transducing platen for use in a signature identificatio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1728125