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:
Oct. 06, 1981
Filed:
May. 23, 1979
Applicant:
Inventor:
Robert H Lacy, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
3403 / ; 3403 / ;
Abstract
An electrical circuit is provided for converting the output from a keyboard into a binary form. At least two priority encoders are interfaced to the keyboard. Each priority encoder generates a binary code when a particular key is depressed. The individual binary outputs from the priority encoders are combined to provide a binary output which is representative of the particular key which has been depressed. In this manner, the output of the keyboard is encoded to binary form. The keyboard encoding system is disabled when a plurality of switches are simultaneously closed to thereby prevent errors caused by multiple switch closures.