The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1981
Filed:
Sep. 14, 1979
Applicant:
Inventor:
Edward I Nelson, Sunrise, FL (US);
Assignee:
Burroughs Corporation, Detroit, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
250229 ; 4004913 ;
Abstract
The invention relates to a photo-optical keyboard having an improved keyboard housing and keys to provide a tactile feel to the keyboard. The keyboard housing is a molded plastic piece having a matrix of rows and columnsof apertures for keys. Each of the apertures has ridges on the interior surface. The keys are each shaped to the apertures. Each key further has flexible fingers on its sidewalls. The flexible fingers have ridges thereon. The ridges on the flexible fingers make contact with the ridges on the inside surface of the aperture during the key depression to provide a tactile feel.