Electronic 3-mode typewriter/calculator with special dead keys a

Details Electronic 3-mode typewriter/calculator with special dead keys a Electronic 3-mode typewriter/calculator with special dead keys a

1983-03-28

1985-07-09

Wright, Jr., Ernest T.

Typewriting machines

Including selection of type-face by...

400 63, 400 78, 400 83, 400120, 400300, 400472, 400479, 340365R, 340709, 364705, 364716, B41J 530

Patent

active

045279179

ABSTRACT:
An electronic typewriter having calculating, displaying and editing capabilities as well as printing capability. The typewriter includes a main control device having three different modes in which the typewriter is operated. In the first mode, the control device performs an arithmetic operation which is defined in a statement including letters, at least one arithmetic symbol and plural numerical values entered through letter, numeral and arithmetic symbol keys. Further, in the first mode, the control device directs a display device to display the statement and a result of the arithmetic operation, and permits the displayed characters to be edited for correction or change. In the second mode, the control device permits the above items of operation in the first mode and directs a printing device to print the displayed characters. The third mode enables the typewriter to display entered characters and print the characters as they are entered and displayed.

REFERENCES:
patent: 3199446 (1965-08-01), Schaaf
patent: 3920979 (1975-11-01), Kilby et al.
patent: 3940758 (1976-02-01), Margolin
patent: 3976840 (1976-08-01), Cleveland et al.
patent: 4330776 (1982-05-01), Dennison, Jr. et al.
patent: 4389641 (1983-06-01), Nakanishi et al.
patent: 4392758 (1983-07-01), Bowles et al.
patent: 4405244 (1983-09-01), Holmes, Jr.
IBM Technical Disclosure Bulletin, "Multiple Overstrike Printing Method", Maholick et al., vol. 22, No. 8B, Jan. 1980, pp. 3786-3788.
IBM Technical Disclosure Bulletin, "Pairing of Escaping and Non-Escaping Characters on the same Key in Electronic Entry Keyboards" Motola, vol. 24, No. 11B, Apr. 1982, p. 5858.

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