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Display Board

IP.com Disclosure Number: IPCOM000092294D
Original Publication Date: 1968-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Dingwall, RP: AUTHOR [+3]

Abstract

Computer output data is visually displayed in dot matrix form on this electromagnetic display board 10 as well as data displayed by manually manipulating a magnetic stylus.

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 57% of the total text.

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Display Board

Computer output data is visually displayed in dot matrix form on this electromagnetic display board 10 as well as data displayed by manually manipulating a magnetic stylus.

Board 10 comprises a sandwich structure of five flat rectangular panels
11...15 shown in expanded relationship. Back panel 11 is formed of nonmagnetic material such as fiberglass and can be transparent or not. Intermediate panels 12 and 14 are formed of magnetic material such as a pre- polyurethane formulation with a filler of iron oxide made by a foaming and compressing process. Panels 12 and 14 have matrices of apertures 18 in registry formed preferably by a loose-pin molding element. Front panel 15 is made of transparent material for visibility into the apertures 18. Central panel 13 of nonmagnetic material also has apertures in registry with apertures 18 and in the same matrix pattern as those of panels 12 and 14. A disk 20 of the same magnetic material as that of panels 12 and 14 is loosely contained in each of the cavities formed by the layers having apertures 18 and panels 11 and 15.

Disks 20 are of dimensions permitting them to be flipped over within the cavities. One side of each disk 20 is coated with a pigment of color contrasting with that of panels 12 and 14. Only a few of the apertures and disks are shown. Panels 12 and 14 and disks 20 are permanently magnetized to provide north and south magnetic poles on opposing flat surfaces of each. Disks 20 within the cavities...