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. 21, 1986
Filed:
Jun. 17, 1985
David Gross, Los Angeles, CA (US);
Other;
Abstract
A momentary membrane switch that includes not only a normally open set of electrical contacts but also a normally closed set of electrical contacts. In one embodiment, a downward force applied to the switch pivots an elongated, flat rocker, to close the normally open contacts and simultaneously open the normally closed contacts. Pivoting of the rocker is yieldably resisted by an overlaying resilient membrane, which forceably returns the rocker to its original position when the force is removed. In another embodiment, a downward force applied to the switch lowers the center of a special disk into contact with an underlying circuit board, to close the normally open contacts, and simultaneously deforms the disk's periphery upwardly, to open the normally closed contacts. Internal stress in the deformed disk returns the disk to its original position when the force is removed. The rocker and disk are both retained without any special attachment in a specially-sized aperture formed in a spacer located between the underlying circuit board and overlaying membrane.