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:
Dec. 16, 1997
Filed:
Jun. 16, 1995
Gary M Sach, Villa Park, CA (US);
Francisco Palop, Fullerton, CA (US);
William A Smith, Laguna Hills, CA (US);
Hughes Aircraft, Los Angeles, CA (US);
Abstract
A tactile feedback switch actuator for an associated force-actuated switch has a key cap linked to a collapsible dome by an optical fiber, all of which are light-transmittable. The actuator is operated by manually applying an actuating force to the key cap which exceeds the modulus of collapse of the dome. In response, the dome reversibly collapses in a tactile snapping action against the underlying light-transmittable switch panel having pressure-sensitive contacts embedded therein to change the operative state of the switch. When the actuating force is withdrawn, the collapsible dome elastically returns to its uncollapsed condition, while the switch remains in its newly-actuated operative state. The actuator and associated switch are structurally integrated and aligned so that light-emitting pixels in an underlying electroluminescent panel provide visual feedback of the operative state of the switch.