公开(公告)号：US3820729A

公开(公告)日：1974-06-28

申请号：US29451672

申请日：1972-10-30

申请人： PRICE BROTHERS CO

发明人： MARCUM A ,  SPRINGER L ,  MULLENDORE D

IPC分类号： B21F17/00 ,  B28B21/64 ,  H02P5/50 ,  B65H81/06

CPC分类号： H02P5/50 ,  B21F17/00 ,  B28B21/64

摘要： Apparatus for electronically monitoring the rotational position of a concrete core as it is rotated about its axis during a prestressing wire wrapping operation and simultaneous monitoring the position of a wire feed carriage moving axially of the pipe to provide signals for controlling the movement of a pantograph type wire guide which oscillates the wire guide with a straight line movement parallel to the axis of the core as the wire feed carriage moves along the bevel end of the core.