A Jin-pole is a rigid pole with a pulley on the end used for the purpose of lifting. The lower portion of the Jin-pole is attached to the upper exterior of the existing tower or structure while the Jin-pole's free end extends above the existing tower or structure. when used to create a segmented tower or antenna, the jin-pole can be detached, raised and re-attached to the just completed segment, for the purpose of lifting the next segment. The process is repeated until the top most portion of the tower is completed. It is also known as a "Gin Pole" to sailors who use it to help raise a mast on a ship as described above.
* [http://www.k7nv.com/notebook/id7.htm notes & drawings]
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