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Title: Device for identifying a circumferential position

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.

Inventors:
Issue Date:
OSTI Identifier:
7020431
Application Number:
ON: DE84014518
Assignee:
Dept. of Energy INEL; ERA-09-036227; EDB-84-119944
DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; DISPLACEMENT GAGES; DESIGN; PIPES; INSPECTION; LIGHT EMITTING DIODES; LIGHT SOURCES; SPHERES; MEASURING INSTRUMENTS; RADIATION SOURCES; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES; 440300* - Miscellaneous Instruments- (-1989)

Citation Formats

Mikesell, C.R. Device for identifying a circumferential position. United States: N. p., 1982. Web.
Mikesell, C.R. Device for identifying a circumferential position. United States.
Mikesell, C.R. Tue . "Device for identifying a circumferential position". United States.
@article{osti_7020431,
title = {Device for identifying a circumferential position},
author = {Mikesell, C.R.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {6}
}