Browse Prior Art Database

Visual Display Board Direct Input Arrangement

IP.com Disclosure Number: IPCOM000089849D
Original Publication Date: 1968-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Dingwall, RP: AUTHOR [+5]

Abstract

Computer input data is generated at the same time as information is visually displayed in dot matrix form on electromagnetic display board EMD 10 by manually manipulating a magnetic stylus. EMD 10 is constructed in sandwich form of thin flat rectangular layers 11...14 shown in expanded relationship. Back layer 11 is formed of nonmagnetic material such as fiberglass and can be transparent or not as desired. Two intermediate layers 12 and 13 are formed of magnetic material such as a prepolyurethane formulation with a filler of iron oxide made by a foaming and compressing process. These intermediate layers have matrices of apertures 18 formed in registry in them, preferably by a loose-pin molding element. Front layer 14 is made of transparent material in order to see into apertures 18.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 2

Visual Display Board Direct Input Arrangement

Computer input data is generated at the same time as information is visually displayed in dot matrix form on electromagnetic display board EMD 10 by manually manipulating a magnetic stylus. EMD 10 is constructed in sandwich form of thin flat rectangular layers 11...14 shown in expanded relationship. Back layer 11 is formed of nonmagnetic material such as fiberglass and can be transparent or not as desired. Two intermediate layers 12 and 13 are formed of magnetic material such as a prepolyurethane formulation with a filler of iron oxide made by a foaming and compressing process. These intermediate layers have matrices of apertures 18 formed in registry in them, preferably by a loose-pin molding element. Front layer 14 is made of transparent material in order to see into apertures 18. Each of the cavities formed by the layers, having apertures 18 and the outer layers 11 and 14, loosely contain a disk 20 of the same magnetic material as that of panels 12 and 13.

Disks 20 are of dimensions permitting them to be flipped over within the cavities. At least one side of each disk 20 is painted a color contrasting with that of layers 12 and 13. The latter and disks 20 are permanently magnetized to provide north and south magnetic poles on opposing flat surfaces of each. Disks 20 within the cavities are flipped by a magnetic stylus, not shown, and held firm by the magnetic forces of layers 12 and 13. A magnetic eraser of polarity opposite to that of the stylus is used to restore the disks to the initial position.

EMD 10 is arranged for generating digital data upon flipping of disks 20. Magnetic field sensitive coils 23 and 24 are arranged about each...