Key extension for shorthand typewriting machine

Details Key extension for shorthand typewriting machine Key extension for shorthand typewriting machine

1980-05-29

1981-12-29

Sewell, Paul T.

Typewriting machines

Key-board or key lever-actuating mechanism

For stenographic typewriter

400 91, 400272, 400473, B41J 514

Patent

active

043079709

ABSTRACT:
A shorthand typewriting machine includes a standard keyboard having two rows of upper keys respectively corresponding to consonant characters and an asterisk character all positioned for operation by the fingers, and a lower row of keys respectively corresponding to vowel characters and disposed for operation by the thumbs. An extension key is attachable to the asterisk key for ganged operation therewith, the extension key being disposed in use in the lower row of keys for operation by the thumbs in conjunction with any one or more of the vowel keys for readily printing an asterisk character in conjunction with a vowel character to indicate the long sound thereof. A retractable extension key is shown which can be retracted when not in use and a detachable extension key is shown which can be removed completely from the asterisk key when not in use.

REFERENCES:
patent: 843032 (1907-02-01), Powell
patent: 1001370 (1911-08-01), Douthat
patent: 1080424 (1913-12-01), Davis
patent: 1267356 (1918-05-01), Barr
patent: 1293739 (1919-02-01), Edwards
patent: 1676809 (1928-07-01), Uhlig
patent: 2399769 (1946-05-01), Sweeney
patent: 2776738 (1957-01-01), Segui
patent: 2841268 (1958-07-01), Cantonwine
patent: 2958408 (1960-11-01), Cantonwine

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