Multiple site, differential displacement, surface contacting assembly

A multiple site probe comprising in combination:

• a mount, a plurality of groups of probes, means mounting said groups of probes for movement thereof relative to said mount;
• a reference;
• and
• differential displacement means interconnecting each of said groups of probes so that each of said groups has a displacement dependent upon its distance from said reference,
• wherein said differential displacement means comprises cams and cam followers, each of said groups having a cam and a cam follower associated therewith and means for effecting simultaneous actuation of one of said cam and cam followers of each of said groups.

A multiple site probe comprising in combination:

• a mounting plate, a plurality of groups of probes;
• means mounting said groups of probes for movement thereof relative to said mounting plate;
• a reference;
• a plurality of cam means and at least some of said groups of probes of said plurality of groups having cam follower means for association with a cam means of said plurality of cam means;
• each of said cam and cam follower means having a displacement, upon actuation thereof, dependent upon its distance from said reference;
• and actuating means connected to said cam means for effecting simultaneous actuation of said cam means.