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:
Jan. 03, 1989
Filed:
Jan. 05, 1987
George Heys, Jr, Cambridge, OH (US);
NCR Corporation, Dayton, OH (US);
Abstract
A keyboard assembly is disclosed comprising a waterproof portion which includes a sheet of printed key tips mounted on a cover support member overlying an indicia sheet identifying the key tips, first and second switch-matrix electrical conductors separated by an insulator sheet mounted on printed circuit board, a plurality of light-emitting diodes mounted in the printed circuit board for selectively lighting one of the key tips when operated, a plurality of I.C. circuit elements secured to the lower surface of the printed circuit board and connected to the electrical conductors forming an electrical circuit associated with the operation of the keyboard and a key operated switching mechanism extending through the keyboard to sense light emitted from elements mounted in the lower surface of the printed circuit board for controlling the operating mode of the keyboard.