Graphic symbol generator

Details Graphic symbol generator Graphic symbol generator

1973-12-13

1976-03-23

Dildine, Jr., R. Stephen

Communications: electrical

Digital comparator systems

178DIG22, 315365, 340324A, 340324AD, 354 7, G06F 1520, G06F 314, B41B 1914

Patent

active

039463656

ABSTRACT:
Apparatus for generating graphic symbols on a cathode-ray tube employs a beam control system which starts each of a plurality of parallel strokes required for each symbol at the bottom, using a programmed offset for symbols which extend below a baseline, and to otherwise move a symbol in the X and Y axes from a position routinely specified as spaced symbols are displayed in a line. The slope of the strokes for a symbol is controlled for italicizing the symbols by programming the relative magnitudes and signs of inputs to X and Y integrators which generate ramp signals added to symbol positioning signals. The beam is turned on and off during each stroke in response to a programmed and clocked bit stream of coded digital signals. The size of a symbol is controlled by programming the clock rate for the beam on-off control and the magnitudes of the inputs to the X and Y integrators.

REFERENCES:
patent: 3182126 (1965-05-01), Ascoli
patent: 3305841 (1967-02-01), Schwartz
patent: 3471848 (1969-10-01), Manber
patent: 3614767 (1971-10-01), Carrell
patent: 3643251 (1972-02-01), Kolb et al.
patent: 3648271 (1972-03-01), McConnell et al.
patent: 3786477 (1974-01-01), Baumgartner
patent: 3803583 (1974-04-01), Manber
patent: 3821729 (1974-06-01), Schultze
(S 23,730,027 Coleman, A.H., The Use of Computers in Editing and Composition. In IEEE Trans. Aero. and Elec. Sys. AES-6(6) p. 804-810., Nov. 1970.

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