Accession Number : ADD016448

Title :   Fiber Optic Cable Footage Indicator.

Descriptive Note : Patent, Filed 21 Dec 92, patented 10 May 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Kruchowy, Roman

Report Date : 10 May 1994

Pagination or Media Count : 6

Abstract : An apparatus for measuring the length of fiber optic cable being deployed from a winch to an underwater environment. The cable deployment measuring apparatus of the present invention comprises a constant current generator for generating a direct current, a resistor array having a plurality of series connected resistors and a plurality of trip wires with one of the trip wires being connected across each of the resistors. The trip wires which function as short circuits are also attached to the cable at predetermined locations along the length of the cable. When the fiber optic cable is being deployed, each trip wire will break when the location at which the trip wire is positioned is unwound from the winch for deployment in the underwater environment. This, in turn, will cause flow through the resistor array with a resulting voltage drop across the array. A digital volt meter may, for example, be used to measure the voltage drop across the array with the voltage reading provided by the volt meter being indicative of the length of fiber optic cable already deployed.

Descriptors :   *FIBER OPTICS, *LENGTH, *PATENTS, *UNDERWATER CABLES, *CABLE REELS, ARRAYS, CABLES, DIRECT CURRENT, GENERATORS, INVENTIONS, OPTICS, RESISTORS, SHORT CIRCUITS, TRIP WIRES, UNDERWATER, VOLTAGE, WINCHES, WIRE, MEASURING INSTRUMENTS

Subject Categories : Fiber Optics and Integrated Optics
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE