Chemistry: physical processes – Physical processes – Crystallization
Patent
1975-09-04
1977-03-15
Serwin, R.E.
Chemistry: physical processes
Physical processes
Crystallization
250231R, 324109, G01D 534, G01N 2128
Patent
active
040121992
ABSTRACT:
Several digital sensing devices are described for use in automated production systems. The first described is for use in the automatic operation of a reactor. This device employs a binant electrometer using a quartz fiber mounted at one end but free to vibrate at the other in an AC field. The fiber oscillates if a charge is placed upon it. An optical slit replaces the ordinary eyepiece reticule scale. With the quartz fiber adjusted so its image is in focus at the optical slit, photoelectric signals are obtained at null charge on the fiber. The quartz fiber is repeatedly charged and allowed to discharge by collecting ions from a source under measurement. Each photoelectric signal causes a digital time reading to be taken. The time readings are used to evaluate the current due to the collected charge. The photoelectric signals, by feedback, also operate the electrometer for continuous or intermittent-continuous operation. Basically, the system is a current digitizer. Further application is also described for the monitoring and control of chemical reactions for production systems. Finally, other types of sensing devices are described; namely, an optical digitizer, a flow optical digitizer a spectro-optical digitizer and a spectro-line intensified digitizer. The use of each in automated controlled processes is shown.
REFERENCES:
patent: 2986697 (1961-05-01), Luger
patent: 3133248 (1964-05-01), Shonka
patent: 3475392 (1969-10-01), McCoy et al.
patent: 3791793 (1974-02-01), Friedmann et al.
Serwin R.E.
The Pioneer Educational Society
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