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
Edward I Nelson, Sunrise, FL (US);
Burroughs Corporation, Detroit, MI (US);
Abstract
The invention relates to a photo-optical keyboard having an improved keyboard housing and keys for the purpose of confining debris and liquid spills on the keyboard. The keyboard housing has a matrix of rows and columns of apertures for keys. The housing has recesses open to the top of the keyboard between the apertures. Further, there are structural supports between the apertures which separate the recesses and cause the recesses to be reservoirs. Multiple keys are positioned in the keyboard housing apertures. Each of the keys has an umbrella cap with edges extending over the recesses. Liquid or debris spilled on the umbrella cap will fall into the recesses to be contained.