Fluid handling – Flow affected by fluid contact – energy field or coanda effect – Responsive to condition external of system
Patent
1974-09-30
1976-03-09
Cline, William R.
Fluid handling
Flow affected by fluid contact, energy field or coanda effect
Responsive to condition external of system
73 375, G01B 1312
Patent
active
039425568
ABSTRACT:
Disclosed is a fluidic sensor of the proximity type with improved sensing range and response. The sensor generally comprises an inner and outer tubes with an annular passageway therebetween. Air or the like under a low pressure (e.g. 4 pounds per square inch) is introduced in the annular passageway. Presence of an article near the discharge end of the device causes the air to be diverted down the interior of the inner tube and such a "signal" can be used to initiate or terminate control actions. The inner tube in the present invention has a novel exterior configuration which provides increased sensitivity which allows higher recovery (signal/supply) ratios and/or sensing at greater distances than possible with the prior art.
REFERENCES:
patent: 3318320 (1967-05-01), Lloyd
patent: 3460375 (1969-08-01), Auger
patent: 3482433 (1969-12-01), Gladwyn
patent: 3545256 (1970-12-01), Beeken
patent: 3597961 (1971-08-01), Pinkstaff
patent: 3615053 (1970-06-01), Pease et al.
patent: 3805869 (1974-04-01), Winter et al.
Cline William R.
Dana Corporation
Pollock Robert E.
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