Measuring and testing – Volume or rate of flow – By measuring thrust or drag forces
Patent
1980-11-14
1983-03-22
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring thrust or drag forces
200 819M, 200 82E, 340610, 7386152, G01F 128
Patent
active
043770908
ABSTRACT:
A through-flow monitor of the type which produces a switching signal as soon as the rate of flow through a duct reaches a particular level consists of a generally tubular housing 1 which can be inserted via screw-threaded or other connections 3, 4 into the flow duct. Inside the housing 1 there is located a shallow diaphragm 5 which is biased by a coil spring 8 into a rest position against an abutment 9. The shallow diaphragm 5 is either of magnetic material or carries a magnetic element and is displaced in the downstream direction by the flow through the housing. A switch device such as a reed switch or Hall generator is located outside of the duct and is switched in as soon as the diaphragm moves to a predetermined position within the duct representative of a particular rate of flow therethrough. A variety of different embodiments are shown featuring apertured and non-apertured diaphragms and illustrating a wide range of modifications which can be used with advantage to monitor the flow of both gaseous and liquid media.
REFERENCES:
patent: 828108 (1906-08-01), Graham
patent: 3119262 (1964-01-01), Wright et al.
patent: 4181835 (1980-01-01), Stadler et al.
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