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Tensioning device for the power-supply and coaxial cables of a camera which is moved in a video surveillance tunnel

  • US 5,406,327 A
  • Filed: 11/18/1993
  • Issued: 04/11/1995
  • Est. Priority Date: 11/30/1992
  • Status: Expired due to Fees
First Claim
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1. A tensioning device suitable for providing an adjustable and balanced tension to the power-supply and multiplexing cable, as well as to the coaxial video transmission cable, both connected up to a camera turret supported by a carriage for to-and-fro translation in a video surveillance tunnel, each of these two cables being anchored in a fixed manner to the carriage, as well as to its point of penetration into the tunnel coming from outside the latter, this device being one in which each of the power-supply and multiplexing and coaxial cables is rigged up over a pulley of a respective movable tensioning pulley block before being anchored to a respective bracket of the carriage, and in which the point of penetration into and of attachment in the tunnel of the power-supply and multiplexing cable is located in the median longitudinal part of this tunnel and on a lateral side of the latter corresponding to the side of the carriage where this cable is anchored, whereas the point of penetration and of attachment of the coaxial cable, as well as its point of anchoring to the carriage are located in the same manner, but on the other lateral side of this tunnel, the pulley block for tensioning this coaxial cable being located in order to move in one half of the length of the tunnel, whereas the pulley block for tensioning the power-supply and multiplexing cable is located in order to move in the other half of the length of the tunnel, these two tensioning pulley blocks being connected together via a flexible cablet or cogged belt which is permanently tensioned by means of a roller of a tensioning device.

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