Patent ID: 9240291
Filing Date: 2016-01-19
CPC Classification: G06F,G07F,H01H

Claim Text:
1. A keypad for connecting to a machine having a connector interface, comprising a housing having a front panel with an outer face and inner surface, the front panel having a plurality of openings and a plurality of sides projecting from the front panel defining an area; a plurality of keycaps protruding through the openings on the front panel from the inner surface to the outer face; a multi-layer printed circuit board having a front face having a plurality of conductive pathways, wherein the movement of one of the keycaps connects with one of the plurality of conductive pathways, the multi-layer printed circuit board having a back face with a plurality of terminals associated with at least some of the conductive pathways; two or more security-shield layers within the multi-layered printed circuit board comprising switch trace protection interposed between the front and back faces, comprising a pair of conductive pathways positioned around the periphery of each layer creating a closed loop for determining if the multi-layered printed circuit board has been edge tampered with; a flexible security circuit interposed between the inner surface of the front panel of the housing and the multi-layer printed circuit board, the flexible security circuit having a plurality of conductive pathways spaced apart by about 0.25 mm to about 0.8 mm for determining if the flexible security circuit has been tampered with; a plurality of connectors extending from terminals on the back face of the circuit board to the connector interface of the machine; and a collar for encircling the connectors that extends from the back face of the multi-layer printed circuit board to the machine to limit unauthorized access to the plurality of connectors.