US2422714A
(en )
1947-06-24
Miniature electric meter
GB929582A
(enExample )
US3546586A
(en )
1970-12-08
Meter movement utilizing magnetic fluid for damping
US4625819A
(en )
1986-12-02
Vertically stable friction-free microbalance
US2449283A
(en )
1948-09-14
Recorder with magnetically positioned electric indicator
US2284893A
(en )
1942-06-02
Electrical measuring instrument
US2367950A
(en )
1945-01-23
Electrical measuring instrument
US2978640A
(en )
1961-04-04
D arsonval-movement assembly
GB994365A
(enExample )
US3277370A
(en )
1966-10-04
Taut band suspended instrument movement with shock resistant longitudinal movement stop
US2110680A
(en )
1938-03-08
Electrical instrument
GB940680A
(enExample )
GB456988A
(enExample )
US3275936A
(en )
1966-09-27
Electric meter including pivoted mag-
net rotor surrounded by continuous
pole faces
US2871449A
(en )
1959-01-27
Magnetic restoring force suspension galvanometer
US2515375A
(en )
1950-07-18
Torque-restoring device for electrical instruments
US2900211A
(en )
1959-08-18
Magnetic suspension with flexibility
US3490043A
(en )
1970-01-13
Stacked construction electric meter
US2333991A
(en )
1943-11-09
Electrical measuring instrument
US3052847A
(en )
1962-09-04
lender
GB550649A
(enExample )
US3317836A
(en )
1967-05-02
Electrical indicating instruments for use with progressively varied outputs
GB863617A
(enExample )
CN120820259A
(zh )
2025-10-21
一种基于张丝铰链的电磁式微力平衡机构
US1739166A
(en )
1929-12-10
Induction meter