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Demand Type Character Display

IP.com Disclosure Number: IPCOM000097228D
Original Publication Date: 1962-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Cross, RG: AUTHOR [+4]

Abstract

The character established in the register of a computer is displayed on demand by unit 10 upon pressing pushbutton 12. Unit 10 comprises ten metal masks 14-1... 14-0. These have decimal numeral stencils in the upper portion and four inverted L-shaped slots 16 in the lower portion. Slots 16 are arranged in binary coded combinations. Tips 18 of wire springs 20 restrain all but one mask from upward movement for any combination of lateral movement of the tips.

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Demand Type Character Display

The character established in the register of a computer is displayed on demand by unit 10 upon pressing pushbutton 12. Unit 10 comprises ten metal masks 14-1... 14-0. These have decimal numeral stencils in the upper portion and four inverted L-shaped slots 16 in the lower portion. Slots 16 are arranged in binary coded combinations. Tips 18 of wire springs 20 restrain all but one mask from upward movement for any combination of lateral movement of the tips.

Upon pressing pushbutton 12, the previously displayed mask is forced down by a lever 26. Torsional distortion of legs 22 of springs 20 is effected by the action of slots 24 in pushbutton 12. This torsional action moves tips 18 to the left, bringing springs 20 into contact with magnet cores 28. Magnet coils 30 are connected to the computer to hold springs 20 by magnetic attraction for each information bit established in the register. Only the attracted tips 18 remain at the left against the magnet cores upon releasing pushbutton 12. As 12 returns to normal, lever 26 moves permanent magnet 32 upwardly attracting all masks 14- 1...14-0, but carrying only the selected mask into position between lamp 36 and screen 38 on which the selected character is displayed.

Once a mask is in the selected or display position, it remains positioned, even though coils 30 are de-energized or re-energized subsequent to the selection, until button 12 is pushed again. Alternately a solenoid arrangement ca...