Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1980-09-11
1982-09-14
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250227, H01J 3912
Patent
active
043497349
ABSTRACT:
The invention concerns the flow and measurement of divided solids in small diameter tubes at high pressures. A flow channel is drilled through a metal block. A second channel is drilled so that the second channel intersects the first channel at a right angle. A beam of light, sent through an optical fiber in the second channel, travels across the first channel and is received and recorded in the distal end of the extension of the second channel. Interruptions of the light beam, due to the passage of solids along the first channel, are translated into indications of the flow of the solids.
REFERENCES:
patent: 4035635 (1977-07-01), Crosland et al.
patent: 4166948 (1979-09-01), Steffen
Cities Service Company
Hostetter Darwin R.
Nelms David C.
Rushton George L.
Sproule Robert H.
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