Externally adjustable stopper plate in a cross-coil type meter

Details Externally adjustable stopper plate in a cross-coil type meter Externally adjustable stopper plate in a cross-coil type meter

1991-03-05

1992-09-08

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With electromagnetic field

235 96, 235144ME, 324154R, G01R 120

Patent

active

051461587

ABSTRACT:
The cross coil type meter has a magnet rotor and a stopper plate inside a coil bobbin. The magnet rotor is driven by a combined magnetic field produced by a cross coil wound on the coil bobbin. A pointer on a dial plate is attached to the magnet rotor's shaft so that it can indicate the magnitude of a measured quantity. The stopper plate engages with the magnet rotor to stop the pointer at a zero position on the dial plate. But when due to some assembly errors the stop position of the pointer and the zero position on the dial plate do not agree, the position of engagement between the magnet rotor and the stopper plate can be adjusted by manipulating the stopper plate from outside until the two positions agree. The stopper plate also has spring pieces formed either around the inner or outer circumference thereof to give a constant contacting resistance between the stopper plate and the coil bobbin, so that the rotating torque of the stopper plate is kept constant, making the position adjustment of the stopper plate smooth and reliable.

REFERENCES:
patent: 2273848 (1942-02-01), Ely et al.
patent: 2514745 (1950-07-01), Dalzell
patent: 2657919 (1953-11-01), McCandless
patent: 2714000 (1955-07-01), O'Connor et al.
patent: 2886783 (1959-05-01), Sicho
patent: 3698353 (1972-10-01), Nakahata et al.
patent: 4206406 (1980-06-01), Scannell et al.
patent: 4354097 (1982-10-01), Menager
patent: 4646007 (1987-02-01), Faria

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