专利名称:Instrument for measurement of electrical
resistance
发明人:BERKELEY GEORGE申请号:US39312141申请日:19410512公开号:US2260234A公开日:19411021
摘要:0,077.Magnetic generator. Evershed Vignoles, Co., Ltd and Luo Erfu , G. B. 27days, No. 12247 July in 1940. [class 35] [also in a group XXXVI] resistance apparatusincludes the A. to resistance supply electric currentC.Generator mechanically and withgenerator is synchronize adjusted and measured by the means of a ratio table ohmmetertogether with through daily resistance. Generator includes a two poles of the earth,permanent-magnet rotor R, its pole-face and a stator winding W with oblique. By therotorshaft r of the means operation by a handle H of transmission device G, a pair of ofcommutator D is carried1, D2, the former and a swamping resistance S2 are connected inserieswith a coil C of the ohmmeter OM across a measuring resistance S, howevercommutator D2be connected between a terminal of S and with moveable ohmmeter coilD and swamping resistance S1 series connectionto the T3 of an end.
申请人:EVERSHED & VIGNOLES LIMITED
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