Typewriting machines – Key-board or key lever-actuating mechanism
Patent
1993-04-12
1995-01-31
Burr, Edgar S.
Typewriting machines
Key-board or key lever-actuating mechanism
400490, 200 4318, B41J 526
Patent
active
053854179
ABSTRACT:
A cover is disclosed that can be easily and quickly positioned over a single key on a keyboard. The cover has pressure sensitive adhesive on its feet for securely affixing the cover to the housing of the keyboard such that the cover is maintained in place over the key on the keyboard which is to be covered. A pair of sidewalls extend upwardly from the feet of the cover. The sidewalls are spaced apart by a distance sufficient to span a single key on the keyboard. A top wall extends between the upper ends of the sidewalls. The top wall is provided with a central opening having a size such that a tip of a pencil or other similar device can be pushed through the opening to engage the key below the top cover.
REFERENCES:
patent: 3109900 (1963-11-01), Hook
patent: 3170050 (1965-02-01), Buturuga
patent: 3233071 (1966-02-01), Buzzell
patent: 3527914 (1970-09-01), Spacek
patent: 4057794 (1977-11-01), Grossfield
patent: 4496811 (1985-01-01), Irwin
patent: 4820887 (1989-04-01), Schmitz
patent: 5150913 (1992-09-01), Hoelzl
Nordy, "Switch Operation Protection", Aug. 1975, vol. 18, pp. 899-900 Patent Associated Literature (IBM Technical Disclosure Bulletin).
Wade Lawrence E.
Wade Michael L.
Burr Edgar S.
Crellin Terry M.
Nguyen Anthony H.
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