Brinell sandwich transducer

Details Brinell sandwich transducer Brinell sandwich transducer

1977-03-14

1978-05-16

Queisser, Richard C.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 81, 73 88E, 73141R, 116114AH, 177 2, G01N 308, G01N 348

Patent

active

040892123

ABSTRACT:
The instant Brinell sandwich transducer has a layer of small hardened steel alls between two layers of softer materials. The balls may be closely packed or separated into a less dense array by a spacer. Indentations in the softer materials indicate the maximum compressive forces that have been applied to the balls. The diameters of identations in a sampling pattern are measured by a microscope since such diameters indicate the magnitude of the forces which have been registered by the transducer. Good resolution over a range of more than a factor of 100 has been obtained. With pulses ranging from static to approximately half-sines with rise times of 0.1 millisecond and a fall time of 0.1 millisecond, rate effects have been insignificant. That is, the indicated gauge pressure is not sensitive to the rate at which the pressure is applied for a broad range of pulse rise times and durations. Also, these gauges incorporate high axial stiffness and flat geometry.

REFERENCES:
patent: 2195451 (1940-04-01), Edwards
patent: 2370784 (1945-03-01), Edwards
patent: 3141440 (1964-07-01), Platt
patent: 3178935 (1965-04-01), McRitchie
patent: 3373716 (1968-03-01), Williams

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