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
- 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 = {Tue Jun 29 00:00:00 EDT 1982},
month = {Tue Jun 29 00:00:00 EDT 1982}
}