| 摘要 |
The system includes a positioning device for applying directional force to the midsection of the pipe, to produce slight bending for orienting the free end. The device has horizontal and vertical adjustment members, each comprising a slotted arm with an integral handle mounted on three congruent support plates and pivoted respectively in the interstices between the middle and outer plates. The plates have concentric circular openings through which a sleeve, for the pipe, axially extends. When the handle of the vertical adjustment member is pivoted in either direction about a pivot pin disposed through one side of the three plates, the pipe will be bent to displace its axis vertically. Pivoting of the horizontal adjustment member, about a pivot pin passing through the lower portion of the three plates, bends the pipe to displace its axis horizontally.
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