Education and demonstration – Language – Writing or printing by hand
Patent
1987-04-08
1989-06-13
Grieb, William H.
Education and demonstration
Language
Writing or printing by hand
40451, 434164, G09B 1104, G09F 1300
Patent
active
048387924
ABSTRACT:
The present invention deals with guided writing and variable displays, for signs, illustrations, etc., using: (a) guiding points at the main intersections of the lines of a common symbol representing a group of symbols, letters or figures, etc., and display means in between; (b) holding means at the said guiding points and tie lines in between; (c) grooves, raised tracks, magnetic tracks, stretched strings, etc., in between the said guiding points and fillers, coverings, markings, etc., along the lines of the symbols to be displayed; (d) colorless markings or grooves as in (c) and pen markings over the selected symbols; (e) bars, inking elements, etc., in between said guiding points, connected to various command centers to print or display the required symbols; (f) series of lights on electric wires in between said guiding points, activated by various command centers; (g) light sources located at the guiding points described in (a) and projecting lights in between, along the lines of the characters to be displayed.
REFERENCES:
patent: 1688266 (1928-10-01), Coffey
patent: 3731402 (1973-05-01), Paul
patent: 3733468 (1973-05-01), Eberly, Jr.
patent: 3905133 (1975-09-01), Charman
patent: 4012010 (1977-03-01), Friedman
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