Title: Turbine flowmeter and components thereof

Abstract: A turbine flowmeter with an unusual radio frequency pick-up and non-magnetic, conductive turbine blades. The pickup includes a coil which is also a part of a tank circuit of an input oscillator. A phase lock loop is then employed which receives, as an input, the output of the input oscillator. When a turbine blade passes the pick-up, the input oscillator undergoes a frequency shift. Circuits connected from the phase lock loop output then produce pulses which are counted and indicated. The circuits may be constructed to cause an indicator to read in units of volume, i.e. the total volume flow through the flowmeter, if desired. The said circuits include two active filters, a Schmitt trigger, a current converter and an output circuit from the phase lock loop output.

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Inventors: Kalotay, Paul Z. (Monrovia, CA, US)

Application Number: 553024
Filing Date: 1975-02-25
Publication_date: 1978-05-09
Assignee: International Telephone and Telegraph Corporation (New York, NY)
Primary Class(es): 73/861.78
Other Classes:
US Patent Ref:

2325927	Aug, 1943	Wilbur	73/231.
2697594	Dec, 1954	Stanton	73/517.
3101615	Aug, 1963	Pavone	73/231.
3177711	Apr, 1965	Ham et al.	73/231.
3455162	Jul, 1969	Michener	73/231.
3567959	Mar, 1971	Kaneko	307/295.
3694776	Sep, 1972	Linder	307/295.
3756081	Sep, 1973	Young	331/65.
3851242	Nov, 1974	Ellis	331/65.

Other Refs:
Primary Examiner: Goldstein, Herbert
Assistant Examiner:
Attorney: Stolzy; A. Donald