Browse Prior Art Database

Decimal Display by Means of a Tube with a Luminescent Plate

IP.com Disclosure Number: IPCOM000097496D
Original Publication Date: 1962-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Fiemeyer, P: AUTHOR

Abstract

The device is a vacuum tube for displaying data.

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Decimal Display by Means of a Tube with a Luminescent Plate

The device is a vacuum tube for displaying data.

The anode A is processed so as to turn luminescent when it is subjected to an electron bombardment from directly-heated cathode f. The tube operates as a triode. The grid is divided into several parts Ga to Gg, i. e., independent grids which are biased. Thus, it is possible to lock partially the electronic beam in order to bombard only determined parts of the anode A. These parts, by turning luminescent, represent when combined a specific character.

The anode is not a form of plate. It is constituted by a helicoid conductor thread which allows reflection of all the emitted light in a selected direction. The high input impedance and the low cutoff voltage allows use of this tube directly with transistor circuits.

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