Measuring and testing – Volume or rate of flow – By measuring thrust or drag forces
Patent
1983-12-12
1985-09-03
Rowland, James L.
Measuring and testing
Volume or rate of flow
By measuring thrust or drag forces
G01F 130
Patent
active
045384711
ABSTRACT:
An impulse momentum dry flow sensor includes a plate for mounting in a "dead-end" turn of a granular material carrying conduit, a leaf spring suspension to limit its movement to substantially a horizontal plane, and a linear force transducer to measure the force applied to the plate by granular material negotiating the turn. The linear force transducer includes an inclined plate mounted in a chute to be impacted by a flow of granular material, the plate being supported by one or more leaf springs from the chute. An actuator rod is mounted to the plate and extends to a servo mechanism which generates a force to resist deflection of the plate, the actuator rod being supported by a pair of spaced leaf springs. The servo mechanism includes an electro-magnetic force generator to apply a force to the actuator rod, with an electronic circuit to produce an electrical current in response to a force applied to the inclined plate to energize the electromagnetic force generator.
REFERENCES:
patent: 2605638 (1952-08-01), Pearson
patent: 3096646 (1963-07-01), Peirce
patent: 3138955 (1964-06-01), Uttley
patent: 3530714 (1970-09-01), Akeley
patent: 3640135 (1972-02-01), Tomiyasu et al.
patent: 4063456 (1977-12-01), Jonkers
patent: 4440029 (1984-04-01), Tomiyasu et al.
Volk Joseph A.
Volk, Jr. Joseph A.
Beta II, Incorporated
Rowland James L.
Tumm Brian R.
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