Browse Prior Art Database

Character Reidentification

IP.com Disclosure Number: IPCOM000089347D
Original Publication Date: 1977-Oct-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Hope, JD: AUTHOR

Abstract

The interchangeability of type balls on certain classes of typewriters allows a given keystroke to produce different characters or symbols depending on the ball selected. Instead of using "paste-ons" on individual keys to indicate the symbol or character for a position on a particular ball, multiple symbols or characters can be embossed or etched into the key face in a manner that only one symbol or character would be observed by the typist at one time at a given viewing angle. The drawing illustrates a key button surface such that three characters are embossed into the surface, each viewable at a specific angle. Thus, the keyboard could be used for three different type balls.

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Character Reidentification

The interchangeability of type balls on certain classes of typewriters allows a given keystroke to produce different characters or symbols depending on the ball selected. Instead of using "paste-ons" on individual keys to indicate the symbol or character for a position on a particular ball, multiple symbols or characters can be embossed or etched into the key face in a manner that only one symbol or character would be observed by the typist at one time at a given viewing angle. The drawing illustrates a key button surface such that three characters are embossed into the surface, each viewable at a specific angle. Thus, the keyboard could be used for three different type balls.

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