Communications: electrical – Systems – Portable self-contained
Patent
1974-12-20
1976-08-24
Curtis, Marshall M.
Communications: electrical
Systems
Portable self-contained
178 15, 178 30, G06F 314
Patent
active
039769909
ABSTRACT:
An apparatus is disclosed for displaying subscript and superscript characters on the screen of a cathode ray tube. The encoded characters are selectively read from a memory which also provides two extended level outputs relating to the subscript and superscript features. In response to the readout of a superscript character from memory, a superscript signal, at the related extended memory output, is fed to an amplifier which, in turn, drives a superscript coil positioned about the neck of the cathode ray tube. This superscript coil generates a flux which reacts with the flux generated by the tube's vertical deflection coil during readout of the selected character thereby raising the position of that character on the screen. Correspondingly, a subscript signal at the related extended memory output results in the generation of a magnetic flux which reacts the vertical deflection coil field during readout of the selected character thereby lowering the position of that character on the screen.
REFERENCES:
patent: 3568178 (1971-03-01), Day
patent: 3742288 (1973-06-01), Albrecht et al.
patent: 3868672 (1975-02-01), Johnson
Curtis Marshall M.
Landis J. L.
Serp W. K.
Teletype Corporation
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