G - Physics – 01 – R
Patent
G - Physics
01
R
324/2, 358/32
G01R 31/00 (2006.01) G01N 27/60 (2006.01) G01T 1/14 (2006.01) G01T 1/142 (2006.01) H01G 7/02 (2006.01)
Patent
CA 1145397
IN THE CANADIAN PATENT OFFICE PATENT APPLICATION entitled IMPROVEMENTS IN OR TO DEVICES FOR MEASURING PARAMETERS WHICH CAN MODIFY THE CHARGE OF AN ELECTRET in the names of Monsieur Jacques LEWINER Monsieur Gérard DREYFUS Monsieur Didier PERINO ABSTRACT OF THE DISCLOSURE The invention relates to a device for measuring ir- radiation capable of modifying the charge of an electret. It is arranged in a portable cassette, between two electrodes held separated by a part and connected to a measuring circuit. A conductive shutter is movable parallel to itself and to the electret between this electret and than electrode, so as to alternately mask this electret with respect to this electrode and to render the electret visible to the electrode. The measurement exploits differences in charge of the electret read according to the movements of the shutter.
350260
Dreyfus Gerard
Lewiner Jacques
Perino Didier
Dreyfus Gerard
Lewiner Jacques
Perino Didier
Smart & Biggar
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