Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-08-02
1991-01-29
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324143, 324151A, 324152, 324167, G01P 100
Patent
active
049889443
ABSTRACT:
A cross coil type instrument includes a plurality of coils cross-arranged around a movable permanent magnet, a needle fastened to the movable permanent magnet through a shaft projecting from the movable permanent magnet and penetrating the coils, a reset-to-zero permanent magnet arranged in the vicinity of the movable permanent magnet, and a stopper so as to make contact with the needle at a reference indication position when the movable permanent magnet is driven only by the reset-to-zero permanent magnet. Further the instrument has a circuit which receives an input signal related to a quantity to be measured and generates drive signals to be supplied to the respective coils based on the input signal so that a composite magnetic field formed by the coils presents a first error in deflection angle of the movable permanent magnet, and an error obtained by adding the first error in deflection angle and a second error in deflection angle due to the reset-to-zero permanent magnet changes linearly as a function of an electrical angle of the drive signals.
REFERENCES:
patent: 2668745 (1954-02-01), Pfeffer
patent: 2778989 (1957-01-01), Miller
patent: 3602811 (1971-08-01), Fales
patent: 3995214 (1976-11-01), Dionne
patent: 4553093 (1985-11-01), Chikasue
patent: 4758784 (1988-07-01), Baker et al.
Eisenzopf Reinhard J.
Jeco Company Limited
Mueller Robert W.
LandOfFree
Cross coil type instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cross coil type instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cross coil type instrument will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-816267