Video push-cable

Details Video push-cable Video push-cable

1998-02-09

1999-08-17

Kincaid, Kristine

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

174131A, H01B 1106

Patent

active

059396792

ABSTRACT:
A push-cable for mechanically and electrically connecting a video camera head to a push reel and a video circuit includes a central resilient push rod made of a composite material such as resin impregnated glass fibers, and a plurality of conductive wires and filler rods helically wound around the push rod. The push-cable further includes a conductive shield layer surrounding the conductive wires and filler rods and sandwiched between inner and outer layers of plastic film tape. A layer of a high pull strength material such as braided KEVLAR surrounds and overlies the film-enclosed conductive shield. The final layer of the push-cable is a co-polymer polypropylene insulating protective layer. The configuration and geometry of the components of the push-cable are preferably designed to achieve a seventy-five ohm impendence and a high signal-to-noise ratio over an extended length.

REFERENCES:
patent: 3594491 (1971-07-01), Zeidlhack
patent: 4365865 (1982-12-01), Stiles
patent: 4767890 (1988-08-01), Magnan
patent: 5122622 (1992-06-01), Reuss et al.
patent: 5313020 (1994-05-01), Sackett
patent: 5808239 (1998-09-01), Olsson

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