Device for identifying a circumferential position

Details Device for identifying a circumferential position Device for identifying a circumferential position

1982-06-29

1985-01-29

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33366, G01D 534

Patent

active

044968361

ABSTRACT:
A device is described which accurately and reproducibly identifies points on the circumference of a non-vertical pipe for use as reference marks for pipe inspections. The device comprises a light-permeable disk-shaped chamber having a plurality of pockets spaced about its circumference, a light source transmitting a beam of light through the chamber, and a light-activated switch positioned to detect the light beam. The chamber contains a freely moving ball sized to be retained by the pockets. The device is mounted to revolve about the axis of the pipe. As it revolves the ball moves from one pocket of the chamber to another, interrupting the beam of light and triggering the light-activated switch, thereby indicating that the device has passed to a pre-selected circumferential position on the non-vertical pipe.

REFERENCES:
patent: 2109054 (1938-02-01), Soreng et al.
patent: 2826823 (1958-03-01), Hagner
patent: 2859725 (1958-11-01), Genasci
patent: 3548508 (1970-12-01), Jacobsen
patent: 3611345 (1971-10-01), Pintell
patent: 3774314 (1973-11-01), Youngs
patent: 3813556 (1978-05-01), Beer et al.
patent: 3863067 (1975-01-01), Gooley
patent: 3923000 (1975-12-01), Cloyd
patent: 3967135 (1976-06-01), Balban et al.
patent: 4110609 (1974-08-01), Beer

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