Measuring and testing – Volume or rate of flow – System
Patent
1977-05-25
1978-09-05
Gill, James J.
Measuring and testing
Volume or rate of flow
System
73231R, G01F 1115, G01F 700
Patent
active
041110439
ABSTRACT:
A turbine wheel is insertable in a line to intercept fluid flowing therethrough. A pickup coil senses the rotation of the turbine wheel. Responsive to the pickup coil when the rotational speed of the turbine wheel exceeds a predetermined safe limit, it is reduced to zero by closure of a gate that prevents further fluid flow through the passage in which the turbine wheel resides. Preferably, the gate comprises a sleeve that covers the housing in which the turbine wheel resides. In one embodiment, two turbine wheels having different rotational characteristics responsive to fluid flow are alternately gated open and closed, depending upon the fluid velocity.
REFERENCES:
patent: 1286942 (1918-12-01), Chrisman
patent: 1934948 (1933-11-01), Perrine
patent: 2078837 (1937-04-01), Carter
patent: 3555901 (1971-01-01), Delatorre et al.
"Two Range Flow Rate & Totalizing System," from "Instruments & Automation," vol. 30, pp. 276-278, (2-1957).
Guthrie James F.
Zimmerman Richard E.
Flow Technology, Inc.
Gill James J.
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