Measuring and testing – Volume or rate of flow – By measuring electrical or magnetic properties
Patent
1989-03-08
1990-02-13
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring electrical or magnetic properties
G01F 158
Patent
active
048995932
ABSTRACT:
An electrode structure for an electromagnetic flowmeter includes a ceramic measuring pipe, an insertion electrode, a press member, and inner and outer gaskets. The electrode has a large-diameter liquid contact end exposed inside the ceramic measuring pipe and an electrode shaft inserted into the electrode insertion hole from the inside of the ceramic measuring pipe. The press member is fitted on the electrode shaft extending outside the ceramic measuring pipe and opposes the electrode liquid contact end through the wall of the ceramic measuring pipe. The press member has a groove adjacent to the insertion electrode on a side which is in contact with the outer surface of the ceramic measuring pipe. The groove is defined by a tapered surface whose diameter is increased toward the ceramic measuring pipe. The inner gasket contacts a surface of the electrode liquid contact end which is in contact with the inner wall surface of the ceramic measuring pipe. The outer gasket is fitted in a space defined by the groove of the press member, the outer surface of the ceramic measuring pipe, and the insertion electrode in the groove so as to be urged against the outer surface of the ceramic measuring pipe. Points of forces acting on the inner and outer surfaces of the ceramic measuring pipe are substantially aligned with each other when the inner and outer gaskets are fastened.
REFERENCES:
patent: 3486376 (1969-12-01), Wada
patent: 3695104 (1972-10-01), Mannherz et al.
patent: 4773275 (1988-09-01), Kalinoski
Goto Tsutomu
Inami Toshihide
Ruehl Charles A.
Yamatake-Honeywell Co. Ltd.
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