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Self centering device for borescopes

  • US 5,365,331 A
  • Filed: 01/27/1993
  • Issued: 11/15/1994
  • Est. Priority Date: 01/27/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus for holding an insertion tube of a borescope centered within a passage along which the borescope travels that includes:

  • a pair of opposed collar assemblies capable of being slidably mounted upon the insertion tube of a borescope;

    each collar assembly including a cylindrical body section and an annular retaining ring, having an outer wall and being removably mounted in face-to-face contact with one end face of the body section;

    each retaining ring having a rear end face in contact with one body section and a front end face facing that of the retaining ring on the opposing collar assembly;

    each retaining ring further including a series of circumferentially spaced rotor seats formed therein and a longitudinally disposed slot passing radially through the outer wall of the ring into each rotor seat;

    a plurality of elongated wire spring members equal in number to that of the rotor seats on each retaining ring, and extending between the collar assemblies, each end of each wire passing through a longitudinal slot formed in a retaining ring into a rotor seat and being attached to a rotor mounted within said seat; and

    clamping means for holding one of said collar assemblies in a stationary position upon an insertion tube whereby said clamped assembly is retained adjacent to the distal viewing end of the borescope while the other collar assembly may be slid along the borescope insertion tube so that the wire spring members maintain contact with the passage in which the borescope travels.

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