Electret sensing medium having plural sensing units

Measuring and testing – Ductility or brittleness

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Details

73355R, 73362CP, 73DIG4, 307 88ET, 310 86, 317247, 317262F, G01B 716, G01K 700, H01G 702

Patent

active

039712508

ABSTRACT:
A sensing medium having two sensing units each formed of a layer of poled electret material that is coated on each planar surface with an electrically conductive plate, such sensing units being separated from one another by a thermal insulating layer.

REFERENCES:
patent: 2614144 (1952-10-01), Howatt
patent: 2769867 (1956-11-01), Crownover et al.
patent: 3453432 (1969-07-01), McHenry

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