US4059798A
(en )
1977-11-22
Method and apparatus for measuring the current flowing in a workpiece
US1927346A
(en )
1933-09-19
Electromagnetic device
US4506214A
(en )
1985-03-19
Measuring transformer
US4774465A
(en )
1988-09-27
Position sensor for generating a voltage changing proportionally to the position of a magnet
EP0215454B1
(en )
1990-01-31
Position detecting apparatus utilizing a magnetic sensor
US4446741A
(en )
1984-05-08
Vibration transducer
US4309655A
(en )
1982-01-05
Measuring transformer
US2102409A
(en )
1937-12-14
Electrical-measuring instrument
US1920764A
(en )
1933-08-01
nickle
US2002445A
(en )
1935-05-21
Transversely magnetized vane instrument
US2409866A
(en )
1946-10-22
Direct-current ratio measuring
GB567435A
(enrdf_load_stackoverflow )
US2446579A
(en )
1948-08-10
Polarized armature current ratiometer
US2272766A
(en )
1942-02-10
Magnetizing arrangement
US4011505A
(en )
1977-03-08
Current measuring device
US2110680A
(en )
1938-03-08
Electrical instrument
US2697204A
(en )
1954-12-14
Calibratable electrical instrument
US3275936A
(en )
1966-09-27
Electric meter including pivoted mag-
net rotor surrounded by continuous
pole faces
US2272767A
(en )
1942-02-10
Direct current ammeter and voltmeter
US2849679A
(en )
1958-08-26
Voltmeter
US2673959A
(en )
1954-03-30
Moving coil electrical instrument
US2515375A
(en )
1950-07-18
Torque-restoring device for electrical instruments
US2889520A
(en )
1959-06-02
Moving magnet meter movement
US2959736A
(en )
1960-11-08
Moving-coil electrical instruments
US2866028A
(en )
1958-12-23
Electrically actuated contactor