Browse Prior Art Database

Speed Pen

IP.com Disclosure Number: IPCOM000084731D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Darringer, JA: AUTHOR [+3]

Abstract

At the present time signatures are verified by humans. The herein described device allows machine verification of signatures. There is evidence that the varying speed with which a person signs his name contains sufficient information to verify that the signature belongs to the signer.

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Speed Pen

At the present time signatures are verified by humans. The herein described device allows machine verification of signatures. There is evidence that the varying speed with which a person signs his name contains sufficient information to verify that the signature belongs to the signer.

Further, there is evidence that most information comes from the velocity in the "y" direction, bottom to top; and that this information is also sufficient to verify signatures.

The present device consists of a writing surface 10 scored horizontally with lines 12 very close together; a stylus 14 such as a common ball-point pen; and a microphone 16 that picks up the sound of the stylus 14 crossing the lines 12 of the writing surface 10 as the signature is written. The frequency of the signal from the acoustic pickup device 16, such as a microphone, indicates the number of lines crossed per unit of time and thus indicates the velocity in the "y" direction.

The precision of the velocity measurement can be adjusted by changing the density of the lines 12 on the writing surface 10. The materials involved are all low-cost items. The writing surface 10 may be a scored transparent plastic coating on a standard form used for some other purpose. The microphone 16 can be mounted on or near the writing surface, leaving the stylus 14 free of connecting wires or mechanical linkages. In this case the stylus 14 could be a simple ball-point pen.

The microphone can be replaced by a magnetic...