Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1982-08-05
1985-04-02
Schmidt, Frederick R.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
2541343R, 2541344, 174117M, H02G 108
Patent
active
045083177
ABSTRACT:
A cable is pulled in a duct or along an overhead support line according to a method and through the use of a tape comprised of warp and weft threads. Indicia printed on the web is used to indicate the length of the course of travel for the cable along which the web extends. The width of the web is sufficient to affix indicia on the surface thereof. The web has an elongation of 10% or less at a break strength which is in excess of 750 pounds of pull force. The pull strength of the woven web is about 2900-3000 pounds. The web is comprised of strands of parallel filaments of yarn consisting of aromatic polyamide fibers. Insulated conductors are incorporated in the tape as two of many warp threads according to a second tape embodiment for conducting a tension signal along the tape. After a length of the course of travel is measured with the tape, one end of the tape is connected to the leading end of a cable while the remaining end of the tape is connected to a winch.
REFERENCES:
patent: 2412562 (1946-12-01), Crawshaw
patent: 3028146 (1962-04-01), Sparks
patent: 3102715 (1963-09-01), Weitzel et al.
patent: 3322163 (1967-05-01), Hughes
patent: 3582537 (1971-06-01), Perreault
patent: 3689031 (1972-09-01), Ruddick et al.
patent: 3711627 (1973-01-01), Maringulov
patent: 3793732 (1974-02-01), Hamrick
patent: 3926227 (1975-12-01), Takada
patent: 4328952 (1982-05-01), Chapman
patent: 4372535 (1983-02-01), Gibson et al.
Textile World, Jan. 1975, "How to Weave High-Tensile Webbings", pp. 109-111.
Murray Thomas H.
Poff Clifford A.
Schad Steven P.
Schmidt Frederick R.
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