FIELD: switchboard instruments. SUBSTANCE: ferromagnetic core has spiral slit in three quadrants. Slit shape is such that in any position of core definite proportion of product of area by coordinate of its center of masses is satisfied. EFFECT: improved design. 4 dwg, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| ELECTROMAGNETIC INSTRUMENT | 0 |
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| ELECTROMAGNETIC MEASURING MECHANISM | 0 |
|
SU1432409A1 |
