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:
Apr. 12, 1977
Filed:
Feb. 02, 1976
Edward W Wanatowicz, Jr, Elk Grove Village, IL (US);
Illinois Tool Works Inc., Chicago, IL (US);
Abstract
A keyswitch for a keyboard is disclosed that has a support assembly which holds a saturable magnetic core and drive and sense line wires for the core. A plunger and magnet assembly that is depressible relative to the housing of the switch allows a permanent magnet to be moved away from the core when the plunger is depressed so the core can come out of magnetic saturation, thereby allowing signals from the drive line to be coupled to the sense line. The support assembly is formed of a two-piece construction that utilizes two identical molded plastic parts whereby the core and drive and sense line wires can be easily inserted into and removed from the support assembly.