专利名称：Electrical position-encoders 发明人：WAYMAN CECIL JOHN风车王国
申请号：US22001362
申请日：19620828
公开号：US3237189A
诗恋
葡萄牙人公开日：
19660222
徐光启>贫困生申请书格式
专利内容由知识产权出版社提供
摘要：943,856. Electric lective signalling systems. GENERAL ELECTRIC CO. Ltd. Aug. 20, 1962 [Aug. 30, 1961], No. 31280/61. Heading G4H. In a position encoder first and cond conductors are wound through the gaps between the teeth of a ferro-magnetic core, and a small ferromagnetic element is mounted for movement adjacent the ends of the teeth so that the reluctance of the magnetic circuit completed by the element is reduced, the coupling between the first conductor and the cond conductors in each gap being characteristic of the relative positions of the element and the core. Fig. 2 illustrates a cross-ction of a shaft position encoder. Each gap contains cond conductors 10-14 and first conductor 8 or 9. The shaft carries a ferro-magnetic element 5 which is sufficiently large to bridge two teeth at all times. The wiring of the encoder, Fig. 3 (not shown), is such that if A.C. is applied to conductors 8, 9, Fig. 5, signals appear in conductors 10-14 in a combination unique to the current position of the shaft. After pha detection in units 29, such as described in Specification 919, 835, a parallel mode two state signal appears at 30-34. The embodiment of Fig. 5 includes a cond, and identical, encoder 271 which is coupled to the shaft driving encoder 27 by a 16: 1 reduction gear. Encoders 271 and 27 thus provide coar and fine signals respectively. To compensate for back-lash in the gears and to ensure accurate changeover from one
coar position to the next for each sixteen steps of the fine scale, the most significant digit of the fine scale is ud to energize either winding 81 or 91 (which together constitute the first conductor) and which correspond to the even-numbered and oddnumbered gaps in the coar encoder. If a rial mode signal is required, D. C.puls are applied in turn to the cond conductors, a rial mode signal then appearing on the first conductor. Specifications 863,027 and 920,535 also are referred to.
厕所里跳高申请人：THE GENERAL ELECTRIC COMPANY LIMITED
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