Arrangement for measuring dimensions of a workpiece

Details Arrangement for measuring dimensions of a workpiece Arrangement for measuring dimensions of a workpiece

1991-11-04

1993-05-25

Williams, Hezron E.

Measuring and testing

With fluid pressure

Dimension, shape, or size

G01B 1310

Patent

active

052129802

ABSTRACT:
The arrangement of this invention for measuring the dimensions of a workpiece (14) includes a circuit in which a fluid circulates. Such circuit comprises a first branch (15) provided with an inlet nozzle (16) and at least one measuring nozzle (17) directed towards the workpiece the dimensions of which are to be measured, and a second branch (19) provided with an inlet nozzle (20) and opening into an output reference nozzle (21). A pressure transducer (22) furnishes an electrical signal representing the pressure difference in the two branches. The arrangement is original inasmuch as the fluid employed is a liquid and that the inlet nozzles are arranged to deliver a liquid flow at their output producing a minimum of noise on the electrical signal issuing from the pressure transducer. Utilization is for in-process measurement of cylindrical bores or outer diameters of cylindrical workpieces or indeed of planar surfaces.

REFERENCES:
patent: 2497236 (1950-02-01), Polk
patent: 2513374 (1950-07-01), Stead et al.
patent: 3494078 (1970-02-01), Miyamoto
patent: 4538449 (1985-09-01), Wegmann et al.

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