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. 26, 1996
Filed:
Jan. 09, 1995
David Palmowski, Syracuse, NY (US);
Other;
Abstract
A keypad structure includes a printed circuit board with a plurality of miniature push-button switches mounted thereon in a predetermined array with the operating surfaces of the buttons substantially in a common plane. An array of holes is formed in a layer material termed a spacer member which is releasably secured to the pcb with the wall defining each hole surrounding a corresponding switch. A plurality of openings is formed in a template sheet which is adhesively secured to the spacer member. The openings in the template sheet are of larger diameter than the holes in the spacer member and provide a positioning guide for dome-type spring members which are supported on the spacer member and overlie the respective operating surfaces of the switch buttons. A flexible, outer sheet is adhesively secured to the outer surface of the template sheet, capturing the springs between the spacer member and the outer sheet. The switches are individually operable by manual pressure applied to selected areas of the outer sheet and repairs may be performed by detaching the pcb from the spacer member.