Measuring and testing – Ductility or brittleness
Patent
1975-02-18
1976-07-27
Woodiel, Donald O.
Measuring and testing
Ductility or brittleness
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
Minnesota Mining and Manufacturing Company
Shoon Frederick
Woodiel Donald O.
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