DE2720151

1535467 Palm print identifier INTERNATIONAL BUSINESS MACHINES CORP 19 April 1977 [21 May 1976] 16261/77 Heading G4R Palm print identifying device has a scanning probe carrying a transducer and arranged so that relative movement occurs between the probe and a palm to be identified by the device. The probe and transducer generate signals indicating the spacing of major palm lines during the relative movement. In one embodiment (Fig. 3) the palm is placed on a flexible sheet 54 on a plate 20 carrying several probes. The palm is located by a peg 25. Mounted to rotate about the peg under control of a motor 27 is a bar 26 carrying the probes. The probes may be rods which slide against sheet 22 or may be transparent rollers 30-33 rotatable about respective shafts. Each roller has an associated light source and detector. The source illuminates the inner surface of its respective roller at the point where it contacts the palm. When the roller passes over a palm line the air gap above the roller causes the roller to reflect the light to the detector. If a palm line is not present the light is scattered. The rollers may contact the skin directly. A rod may be used instead of several rollers. The sheet may be replaced by an endless web passing over two spaced rollers (Fig. 7, not shown). The support 46-49 for each roller carries markings which are read to determine the height of each roller as it passes over the palm. A sensor 41 reads markings indicating the position of bar 26 to determine the location of the palm lines. The locations of palm lines detected by selected rollers and the contour of the palm detected by selected rollers is compared with stored data (Fig. 11, not shown) to determine validity of the palm pattern.