Measuring and testing – Volume or rate of flow – System
Patent
1976-03-26
1977-07-05
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
System
G01F 132
Patent
active
040331890
ABSTRACT:
A vortex-type flowmeter having a flow tube forming a conduit for the fluid to be metered and an obstacle assembly mounted therein capable of generating fluidic oscillations. These oscillations cause a deflectable section of the assembly which is cantilevered by a flexible beam from a fixed section mounted across the tube to vibrate at a corresponding frequency proportional to flow rate. These vibrations are mechanically transmitted to a coupling point outside the flow tube, whereby the flow rate may be read by means of an external force sensor engaging the coupling point. Vibration transmission is effected by a rod secured at one end to the deflectable section and passing through a bore in the flexible beam to join a probe which extends at right angles thereto. The probe is disposed within a bore in the fixed section and projects through an opening in the flow tube wall to terminate in the outside coupling point. The probe is held by a flexible diaphragm covering the flow tube opening and acting as a fulcrum, the outside portion of the probe being short in length relative to the inside portion, whereby the resultant lever affords mechanical advantage to amplify the force applied by the coupling point to the force sensor.
REFERENCES:
patent: 1935445 (1933-11-01), Heinz
patent: 2809520 (1957-10-01), Richard, Jr.
patent: 3530714 (1970-09-01), Akeley
patent: 3541854 (1970-11-01), Jones et al.
patent: 3888120 (1975-06-01), Burgess
patent: 3946608 (1976-03-01), Herzl
Herzl Peter J.
Metzger Harold W.
Fischer & Porter Co.
Goldstein Herbert
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