发明名称 Portable surveying gyrocompass apparatus
摘要 A miniature automatically self-aligning azimuth reference employs a floated pendulous gyrocompass device for the rapid determination of geographic north as required for surveying purposes. Fast alignment with north from an initially misaligned condition is effected in an iterative manner through the action of a unitary vertical-axis magnetic centering-torquer-pick off system employing eddy current forces.
申请公布号 US4033045(A) 申请公布日期 1977.07.05
申请号 US19750621907 申请日期 1975.10.14
申请人 SPERRY RAND CORPORATION 发明人 WING, WILLIS G.
分类号 G01C19/38;(IPC1-7):G01C19/38;G01C1/02 主分类号 G01C19/38
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