Pneumatic measuring device for measuring workpiece dimension
AssigneeMeseltron S.A.
InventorsHeinz Wegmann, Hans Sigg
Life of this patent
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Abstract
A pneumatic measuring device is disclosed which comprises a pneumatic circuit containing a first branch (15) equipped with an inlet nozzle (16), oppositely disposed measuring nozzles (17) and a second branch (19) equipped with an inlet nozzle (20) and a reference nozzle (21). A differential pressure transducer (22) having a semiconductor element enables the difference in pressure between the branches (15) and (19) to be measured and to supply through a terminal (23) a signal representing the dimensions measured opposite the nozzles (17). The pneumatic circuit system, with the pressure transducer, is included in the measuring spindle (12).
Claims11
A pneumatic measuring device for measuring dimensions of a workpiece, said device comprising a pneumatic circuit containing a first branch having an inlet nozzle and at least one measuring nozzle and a second branch having an inlet nozzle being connected to a reference outlet nozzle, said first and second branches being connected to a pressure transducer delivering an electric signal representing the difference in pressures between said branches of the pneumatic circuit, a measuring spindle having a surface to which said at least one measuring nozzle is connected and means for connecting the inlet nozzles of said first and second branches to a regulated pressure source, said pressure transducer comprising a differential pressure transducer having a semiconductor element, said pneumatic circuit and said differential pressure transducer being integrally housed within said measuring spindle.
Dependencies are inferred from the claim text.