Communications: electrical – Systems – Portable self-contained
Patent
1974-01-07
1976-02-17
Trafton, David L.
Communications: electrical
Systems
Portable self-contained
3401725, G06F 314
Patent
active
039394581
ABSTRACT:
A method and apparatus for effecting the display of symbols, in tabulated form, on the screen of a data-video device, utilizing a data source, an image repetition store and a symbol generator, in which data is fed by the data source identifying the area of the screen in which a tabulator mark is to be depicted, with the symbol generator releasing signals operative to effect the desired display of the tabulator mark. Control may be effected by means of control words from the data source for "tabulator set", "tabulator cancel", and "tabulator advance", as well as for cancellation of tabulator marks of a line, or cancellation of all symbols with the exception of tabulator marks. A writing mark may be employed in connection with the designation and display of a tabulator mark, and the tabulator marks may be disposed in areas with or without the display of symbols therewith. The invention is particularly adapted to applications involving the so-called "rolling-page method" of display.
REFERENCES:
patent: 3346853 (1967-10-01), Koster et al.
patent: 3614766 (1971-10-01), Kievit
patent: 3675208 (1972-07-01), Bard
patent: 3816823 (1974-06-01), Manber
Siemens Aktiengesellschaft
Trafton David L.
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