Typewriting machines – Means auxiliary to typewriting function – Indicator means
Patent
1977-12-22
1979-10-02
Wright, Jr., Ernest T.
Typewriting machines
Means auxiliary to typewriting function
Indicator means
400279, 400711, B41J 2950
Patent
active
041696859
ABSTRACT:
A panel of selectively-controllable indicator elements is associated with a viewable escapement scale on a typewriter and provides an indication of a set of operative tab stops stored in an electronic memory. Escapement position codes extracted from an electronic tab storage drive a logic circuit that is so connected as to modify the state of individual panel elements at corresponding escapement scale positions to indicate a tab layout. By providing, in a preferred implementation, means for accessing the presently operative (selected) set of tab codes from a memory adapted to retain plural tab sets, the operator is enabled to assess the layout of each selection visually. In such an implementation for a typewriter having two different selectable pitches, say pitches of 10 and 12 characters per inch, the panel elements are arranged to display the selected tab layout respective of pitch.
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Grosser George E.
International Business Machines - Corporation
Wright, Jr. Ernest T.
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