Definition of "oil-bath" [oil-bath]

• In mech.: A quantity of oil in a cup or receptacle, such as a gear-case or engine-case, into which a running part of a mechanism dips, carrying or throwing oil to other parts. (noun)
• The vat or vessel filled with oil in which pieces of steel are dipped in oil-tempering. (noun)
• A stream of oil directed upon a tool that is cutting steel. (noun)
• In physical, a vessel containing oil, in which an object, as a resistance-coil or the bulb of a thermometer, the temperature of which is to be held constant, is submerged. (noun)

The Century Dictionary (Public Domain)

• "In moderately dusty conditions, oil-bath air filters are cleaned once a week, dry-paper air filters a little less frequently."
• "It may be considered a cost-effective solution even though a housing with oil-bath lubrication is required (see fig. 36)."
• "The oil-bath was prepared by treating olive-oil with nitric acid."