Moving magnet type meter

Details Moving magnet type meter Moving magnet type meter

1989-06-16

1990-03-06

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324143, G01R 120

Patent

active

049069195

ABSTRACT:
In the moving magnet type meter of the present invention, the coil mounting portions of a bobbin body are projected outwards in a generally arched shape on the central side to form circular arc-like or inclined surfaces, whereby the bobbin body can be made strong against the external pressure induced by the mounting of coils thereon and can be prevented from being deformed. Further, the upper portion of a movable magnet is centrally formed with an upwardly projecting shaft support portion for supporting a pointer shaft, and a thrust bearing portion is formed in the lower surface of an upper bobbin body portion in an opposed relation to the upper end face of the said shaft support portion through a predetermined slight gap, whereby the pointer shaft can be formed in the shape of a straight rod without forming a reduced-diameter portion serving as a thrust bearing, so the fabrication of the pointer shaft is easy and it is possible to maintain the strength of the pointer shaft itself.

REFERENCES:
patent: 1485289 (1924-02-01), Peterson
patent: 3150318 (1964-09-01), Friedmann
patent: 4646803 (1987-03-01), Hanaoka et al.
patent: 4760333 (1988-07-01), Ichimura et al.

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