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:
Nov. 12, 1985
Filed:
Nov. 21, 1983
Anthony J Van Zeeland, Crystal Lake, IL (US);
Ronald S Denley, Woodstock, IL (US);
Oak Industries Inc., Rancho Bernardo, CA (US);
Abstract
A keyboard switch which is used in combination with a membrane switch array includes a housing adapted to be positioned on the membrane switch array. There is an upright opening in the housing and a plunger is reciprocal in the housing opening. There is a spring urging said plunger outwardly in said opening and there is an actuator lever pivotally mounted on said housing and positioned for engagement by said plunger. Inward movement of said plunger through a given distance causes the application of a switch closing force by said lever on the underlying switch array. The geometry of the actuator lever-plunger interface can be arranged for linear application of the switch closing force or sudden application of said force. Sudden application of the switch closing force provides a tactile feedback.