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US 3,943,410 AGranted
Light assembly for use in a conduit
AssigneeHalliburton Company
InventorsKarl H. Kalberer, Jr., Harold D. Fish
Life of this patent
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Abstract
A light assembly for use with apparatus for the inspection of conduits such as underground sewer lines is presented. The light assembly includes a plurality of low energy light sources, and a current interrupting device which interrupts the current to the light sources when the voltage across the light sources exceeds a given voltage.
Claims10
A light assembly for use with an apparatus having a camera for inspecting a conduit comprising:
- a cylindrical outer sleeve;
- a cylindrical inner sleeve spaced concentrically within said outer sleeve forming an annular chamber therebetween;
- a plurality of light sources located in the annular chamber and near one end of said inner and outer sleeves;
- an electrical cable secured to one of said sleeves for supplying electrical current;
- and
- an electrical circuit located in said annular chamber and connecting said electrical cable to said light sources for passing electrical current when the voltage across said light sources does not exceed a predetermined value, and for interrupting electrical current when the voltage across said light sources does exceed said predetermined value.
3 more elements
Dependencies are inferred from the claim text.