Abstract: A device measures cylindricity of a cylinder having an axial end, a circumference and an inside diameter. The device includes a track for placement at an axial end of the cylinder to be measured. The track extends around the circumference of the cylinder. A pair of trucks are mounded to the track for movement around the cylinder circumference. A sighting beam generator, in particular, a laser, is connected to each truck for aiming sighting beams axially along the inside diameter of the cylinder. A micrometer adjustment is connected between each laser and its truck for adjusting a radial position of each sighting beam.

Abstract: A self-advancing endoscope (10) comprising an elongated flexible tubular member (12) and an elongated channel (14) defined by the tubular member (12) and having a distal end wall (16). Piston means (22) are slideably disposed in the channel (14) toward the distal end wall (16). The endoscope (10) also comprises means (24, 26) for reciprocating the piston means (22) such that the piston means (22) impacts the distal end wall (16) on an advancing stroke.

Abstract: A method and apparatus for remote and automatic detection of surface flaws in tubes, pipes and other cylindrical or enclosed cavities that have been treated with a photoluminescent medium. The device, or so-called scanning probe, has a nonrotating ultraviolet radiation source, an offset rotary drive means, a passive rotary scanning means that includes a plurality of lenses, reflectors and an optical filter, a non-rotating solid-state photodiode and support electronic circuitry. The ultraviolet illumination source and photodiode are mounted on-axis and do not rotate. A passive optical scanning means is caused to rotate by an offset rotary drive means. Ultraviolet radiation from the illumination source is projected onto the test-part surface and causes dye penetrant that has been previously deposited onto the testpart surface to fluoresce at a different wavelength, thus revealing the presence of surface cracks and flaws.

Abstract: An optic device for use in viewing the interior of pressurized vessels, especially high pressure fluid pipelines. Embodiments of the optic device allow manual or automatic insertion/retraction of the viewing head allowing variable depth viewing of the interior. The viewing head is capable of various embodiments including the ability to carry various optic devices and is adapted to withstand high pressures. The automatically insertable optic device can be either hydraulically or pneumatically actuated. Both the automatic and manual optic devices may be fixed or variable focus. The fixed focus devices utilize lenses, ultra-miniature color cameras, and fiberscopes either with or without integral light sources as part of the viewing head. The variable focus device utilizes lenses and a reflector. Preferably, the viewing head utilizes sapphire viewing windows which exhibit excellent light transmission and resistance to high pressures.