Title page for ETD etd-07212010-020128
|Type of Document
||Fletcher, J. Robert
||The development of an instrument to control the oxygen concentration and flow rate of an air-oxygen mixture.
||Master of Science
|Arp, L. J.
|Brown, Eugene F.
|Mabie, Hamilton H.
|Date of Defense
The equipment as designed and constructed is a workable
solution to the problem of mixing air and oxygen at selectable
oxygen concentrations and flow rates. Control of the flow of the
individual gases is adequate with the metering elements as designed.
The laminated brass stock and shim stock is easily fabricated and
works well. The mechanical linkage is the weakest link in the
design. The hysteresis in setting concentration and the inaccuracies
in setting concentration are primarily related to poor design in
the linkage. Ways to possibly improve the linkage are discussed
in the Recommendation section of this thesis. The only problem
with the read-out design is at low flow rates, i. e., less than 5000
cm3/min (5 -(min)) the scale sticks at times.
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