Original Publication Date: 1984-Oct-01
Included in the Prior Art Database: 2005-Feb-05
A keyboard membrane switch assembly is tested at one station in approximately five seconds of cycle time through using a test probe for each key, with each probe having a linear actuator applying an accurately programmed small force over a small distance. Each of a plurality of keys 1 (Fig. 1) of a keyboard membrane switch assembly 2 has a separate probe 3 associated therewith. Each of the probes 3 includes a spindle 4 attached to a flexure 5 (Fig. 2), which is supported in a permanent magnet 6 adjacent the bottom thereof. The permanent magnets 6 of all of the probes 3 are mounted in a fixture having the same curvature as the keyboard membrane switch assembly 2 (Fig. 1). Each of the magnets 6 (Fig. 2) is supported on an upper portion 7 of a support 8, which has a post 9 extending downwardly from the upper portion 7.