Apparatus and method for reducing interline twisting

Details Apparatus and method for reducing interline twisting Apparatus and method for reducing interline twisting

1978-03-02

1980-07-15

Love, John J.

Railways

Tubular way

Internal service device

33178F, 134167C, 2541345, B61B 1310

Patent

active

042122481

ABSTRACT:
An apparatus and method for reducing interline twisting of any pair of a plurality of lines connected to a device which longitudinally traverses the interior of an elongated tubular member is disclosed. The lines are connected between the device and the tubular member exit opening through which the device may be inserted into the tubular member. The device tends to rotate about its longitudinal axis as it traverses the interior of the tubular member. The apparatus comprises a barrier guide member having a body portion mounted for rotational movement about a rotational axis. The body portion includes means for maintaining a fixed orientation of the body portion relative to the direction of pull of the earth's gravity. At least one line is connected to the body portion, for example a tow line, and at least one other line is preferably connected to the device on a side of the body portion opposite to that at which the tow line is connected. The lines connected to the body portion thus have a fixed spatial orientation; and the lines, if any, connected to the device are physically constrained to prevent any device connected line from encircling any of the connection points between the body portion and its associated lines (and hence from encircling any body portion connected line) whereby a fixed relative orientation between pairs of said plurality of lines is maintained to prevent interline twisting.

REFERENCES:
patent: 2601691 (1952-07-01), Dyer
patent: 2897779 (1959-08-01), Perkins
patent: 2935777 (1960-05-01), Perkins et al.
patent: 3940855 (1976-03-01), Ver Nooy et al.

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