Cross coil type indicating instrument with an externally adjusta

Details Cross coil type indicating instrument with an externally adjusta Cross coil type indicating instrument with an externally adjusta

1992-09-22

1995-01-03

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With electromagnetic field

324154R, G01R 120

Patent

active

053789806

ABSTRACT:
A cross coil type indicating instrument is improved in that a coil bobbin keeps a torque sufficient to hold a stopper plate as a zero point stopper to prevent a positional deviation of the stopper plate after position adjustment and that a stable rotational torque is kept in the positional adjustment of the stopper plate with a jig to assure a reliable position adjustment. The stopper plate is held between an upper bobbin and a lower bobbin with a pinching pressure to inhibit a vertical motion thereof. Spring pieces are formed on an outer periphery of the stopper plate while contacting with the inner face of the lower bobbin with an elastic force. By a biasing force of the spring pieces, the stopper plate is held in the lower bobbin along matching faces between the upper bobbin and the lower bobbin with a substantially constant holding torque.

REFERENCES:
patent: 2450331 (1948-09-01), De Giers et al.
patent: 4090131 (1978-05-01), Mas
patent: 4646007 (1987-02-01), Faria
patent: 4724601 (1988-02-01), MacManus et al.
patent: 4827210 (1989-05-01), Lindig et al.
patent: 5061891 (1991-10-01), Totsuka et al.
patent: 5146158 (1992-09-01), Ooike

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