Abstract:
A keyboard actuator which includes a first member adapted to be supported over a circuit board having a conductive pattern thereon and supporting a resilient conductive layer by way of an insulator layer having a window therethrough in line with at least a portion of the conductive pattern, a second member snapable into the first member and slidable while held therein, first and second resilient biasing means, the first biasing means separating the members and the second biasing means extending between the second member and the conductive layer.
Abstract:
An encoded keyboard device which includes a plurality of layers of insulator material, at least two of which have patterns of electrically conductive material supported thereby, a plurality of holes extending through one of said layers and positioned with respect to said conductive patterns so that electrically conductive material may extend through the holes and electrically interconnect the patterns, and a plurality of keys adapted to push electrically conductive material against one of said patterns to produce a coded output representative of the key depressed.
Abstract:
A structure which includes a circuit board having a conductive pattern thereon and supporting a resilient conductive layer by way of an insulator layer having a plurality of windows therethrough in alignment with portions of the conductive pattern, the resilient layer divided into at least two sections held electrically apart by pins coupled to a frame member in which the board and layers are packaged.
Abstract:
A keyboard array including a board having a conductive pattern thereon, a resilient conductive layer, a first or external plunger supported in a housing and slidable therein, a second or internal plunger supported in the external plunger and first resilient biasing means urging the first plunger towards the housing and away from the conductive layer and a second resilient biasing means urging the second plunger away from the first plunger and towards the conductive layer.