G - Physics – 01 – F
Patent
G - Physics
01
F
73/68
G01F 1/58 (2006.01)
Patent
CA 1316708
FP-462 ENCAPSULATED ELECTROMAGNETIC FLOWMETER Inventor: James W. Davis, a citizen of the United States of America and resident of New Britain, Pa. ABSTRACT OF DISCLOSURE An electromagnetic flowmeter having a frame assembly formed by an octagonal metal frame within which are mounted a pair of electromagnets and a pair of electrode holders. The electromagnets are secured to one set of opposing sides of the frame along a first transverse axis which passes through the geometric center of the frame while the holders are secured to another set of opposing sides along a second transverse axis which passes through the center at right angles to the first axis. The frame assembly is encapsulated within a generally cylindrical plastic insulating body of polymeric material having a longitudinal bore therein defining a flow conduit whose flow axis passes through the geometric center of the frame and is perpendicular both to the first and second transverse axes whereby when fluid flow therethrough it intersects the magnetic lines of flux produced by the electro- magnets. The resultant voltage induce in the fluid is a function of its flow rate and is picked up by the electrodes to provide a flow rate signal. To prevent the plastic body from cracking as a result of differences between the thermal coefficient of expansion of the metal frame and that of the polymeric material, an interfacial layer is formed therebetween having elastomeric properties.
569311
Fischer & Porter Company
Smart & Biggar
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