专利名称：AUTOMATIC POSITIONING DEVICE发明人：EDWARD A. CLAVIN,DONALD H.
MCCULLOUGH,DAVID R. MCCULLOUGH
申请号：US3705506D申请日：19710331公开号：US3705506A公开日：19721212
摘要：A method and apparatus for rapidly positioning a movable device longitudinallyinside a tubular structure, such as a pipe, wherein a sensing means attached to saidmovable device functions to position said movable device responsive to a changingmagnetic field generated by an establishing means positioned at a preselected locationexterior to said pipe. When said movable device is required to be sequentially positionedlongitudinally at a series of locations in one direction inside said pipe, the method andapparatus automatically re-positions said movable device at each location in the desiredsequence. This abstract is neither intended to define the invention of the applicationwhich, of course, is measured by the claims, nor is it intended to be limiting as to thescope of the invention in any way.
申请人：CRC-CROSE INTERN. INC.
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