Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1994-05-04
1995-08-08
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
73861, 73863, 318 51, G01F 100, G01N 122
Patent
active
054402174
ABSTRACT:
A drive system for a probe of the type containing a first tubular housing within a second tubular housing which first tubular housing is advanced into and retracted from a conduit to take measurements of fluid within the conduit has a stepper motor for advancing the first tubular housing precisely controlled distances into and within the conduit. The stepper motor is connected to the first tubular housing through a friction drive roller which presses against the first tubular housing. Additionally, a rotational motor is connected to the outer tubular housing through a timing belt which extends around the second tubular housing. Sensors may be provided for measuring linear and rotational movement.
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patent: 4161883 (1979-07-01), Laird et al.
patent: 4209693 (1980-06-01), Fite et al.
patent: 4561288 (1985-12-01), Moenkhaus
patent: 4974455 (1990-12-01), McGowan et al.
Appendix A, Title 40, United States Code of Federal Procedure, Part 60, Chapter 1, EPA Methods 1 and 2, pp. 632-667.
EPM Environmental, Model 797, Diluting Stack Sampler Advertising Brochure.
Alstadt Lynn J.
Ro Bentsu
United Sciences, Inc.
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