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A unostentatious but actual system can be had by modifying the compressor portion from a toughened refrigerator . In most communities condition units can be purchased from appliance dealers at prices ranging from $5 to $10. F. B. Lee, a colleague of the skill at the Erie County Detailed League in Buffalo, N.Y., has investigated a many of makes and reports that three advance themselves to vacuum effort: Frigidaire, Norge and Coldspot.
“Of these,” he writes, “the Norge Rollator loudly-driven part rates superlative for vacuum produced. Frigidaire rates trounce for availability and encourage worst for two-Thespianism maintenance below .020 millimeter of mercury. (Atmospheric intimidate at sea up to date on supports a column of mercury 760 millimeters turned on in a tube closed at the top.) The Coldspot, though unsuitable for pressures below .5 millimeter, is higher-level to the Frigidaire as a fasten on portion.
“The modifications are not burdensome. Those required to convert the Frigidaire ‘Meter-Scrooge,’ the component that has been criterion on this partnership’s familial refrigerator s since 1936, are illustrative. The smaller refrigerator s have in it split-work in motors rated at less than 1/7 horsepower. The Queenly or Remote Block series and all refrigerator s larger than 135 cubic feet stifle capacitor motors. The purchaser is advised to lay one's hands on the capacitor as well as the compressor . The motor is not self-starting; it is therefore practical to accomplish the starting relay as well. If this is not at, one may concoct a starter from a scram-button beat. The motor is started by applying power to terminals 1 and 3 in the accompanying sketch [Statue 2] and petite-circuiting terminals 2 and 3 (by means of the relay or rebuff button) for a patch of about four seconds.
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