Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1985-12-16
1987-07-14
Levy, Stewart J.
Measuring and testing
With fluid pressure
Dimension, shape, or size
G01B 1308
Patent
active
046794239
ABSTRACT:
A method and apparatus for measuring the pore size on the surface of an externally enhanced evaporator tube. The apparatus is the pneumatic equivalent of an electrical wheatstone bridge circuit. Air is fed into two parallel legs of a circuit. The first leg has a variable flow control valve in series with a reference fixture having a fixed orifice therein. The other leg has a variable flow control valve in series with a test fixture matingly engaged with the enhanced tube to be measured. A differential pressure transducer measures the difference between the air pressure drop across the enhanced tube and the air pressure drop across the reference orifice plate. Therefore, any changes in the pressure, temperature, or humidity of the supply air will affect both legs in the same manner, so the reading of the transducer will not be affected by changes in supply air.
REFERENCES:
patent: 3508432 (1970-04-01), Marshall, Jr. et al.
patent: 3728894 (1973-04-01), Stern
patent: 4001359 (1977-01-01), Fisher et al.
patent: 4088009 (1978-05-01), Fukuda
patent: 4510805 (1985-04-01), Saint-Amour
patent: 4550592 (1985-11-01), Dechape
Carrier Corporation
Kelly Robert H.
Levy Stewart J.
Williams Hezron E.
LandOfFree
Method and apparatus for measuring the pore size of enhanced tub does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for measuring the pore size of enhanced tub, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for measuring the pore size of enhanced tub will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1420920