Device for identifying a circumferential position

Patent · Tue Jan 01 00:00:00 EST 1985

OSTI ID:865320

Mikesell, Charles R ^[1]

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1. Idaho Falls, ID

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.

• Research Organization: EG & G IDAHO INC
• DOE Contract Number: AC07-76ID01570
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4496836
• OSTI ID: 865320
• Country of Publication: United States
• Language: English

Related Subjects

device
identifying
circumferential
position
described
accurately
reproducibly
identifies
circumference
non-vertical
pipe
reference
marks
inspections
comprises
light-permeable
disk-shaped
chamber
plurality
pockets
spaced
light
source
transmitting
beam
light-activated
switch
positioned
detect
contains
freely
moving
ball
sized
retained
mounted
revolve
axis
revolves
moves
pocket
interrupting
triggering
indicating
passed
pre-selected
chamber contains
device comprises
light source
light beam
switch position
circumferential position
pipe inspection
reference mark
vertical pipe
activated switch
/250/33/