Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1979-12-31
1983-07-26
Curtis, Marshall M.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340707, 340723, 358 81, G09G 128
Patent
active
043957072
ABSTRACT:
A light pen directed toward an area of a fluorescent screen controls a pulse generator, which causes said area to be brightened and also causes a defined target mark to be displayed. The coordinates of the target mark may be ascertained from the instantaneous deflecting voltages which control the electron beam and may be indicated or stored or supplied to a computer for evaluation. In such computer, the coordinates of a plurality of target marks may be used to ascertain the length of curves and contours or the areas of regions which have been circumscribed with the light pen. Various possible uses and methods of evaluation are described as well as equipment for carrying out the method.
REFERENCES:
patent: 3441667 (1969-04-01), Novacek
patent: 3662373 (1972-05-01), Schumann
patent: 3997891 (1976-12-01), Iwamura et al.
patent: 4149184 (1979-04-01), Giddings et al.
patent: 4162494 (1979-07-01), Bacon
patent: 4189743 (1980-02-01), Schure et al.
patent: 4190833 (1980-02-01), Bejting et al.
patent: 4200867 (1980-04-01), Hill
patent: 4232311 (1980-11-01), Agneta
Curtis Marshall M.
Kelman Kurt
Kretztechnik Gesellschaft m.b.H.
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