Measuring and testing – Embrittlement or erosion
Patent
1987-04-02
1988-09-06
Levy, Stewart J.
Measuring and testing
Embrittlement or erosion
G01N 1700
Patent
active
047683732
ABSTRACT:
A sensing probe having a hollow tube for disposition in a flow stream is provided with an internal stiffening rod. A volume between the stiffening rod and the inner surface of the tube communicates with an open end of the sensing probe. In one embodiment, oppositely directed spiral grooves are formed in the surface of the stiffening rod to define the volume. A method of manufacturing the sensing probe includes first inserting a stiffening rod into a tube and then turning the tube to a desired wall thickness.
REFERENCES:
patent: 2763534 (1956-09-01), Campbell
patent: 3630216 (1971-12-01), Kelly
patent: 4389880 (1983-06-01), Robinet
Otis Surface Safety Equipment and Systems Type Pe Otis Erosion Monitor Pilot, p. 58.
Baker CAC Pilots, Relays and Components-Sand Probe Assembly.
HLR Controls, Inc., Sand Probe Assembly Part No. 7620.
Sigma Enterprises, Inc., Sand Probe Indicator 29 SP 24 dated 12-19-84.
Levy Stewart J.
Raevis Robert R.
Sigma Enterprises, Inc.
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