Abstract: The invention comprises a lubricant trough or reservoir which is replaceably secured to an inner wall of a machine in an area where the reservoir will intercept, and reclaim, lubricant thrown by a rotating lubricant slinger-disc, or thrown by meshing gears, and discharge the reclaimed lubricant to bearings which carry a rotating shaft. The reservoir is open-topped, to admit the thrown lubricant, and has conduits extending therefrom which terminate in adjacency to bearings to be lubricated. The lubricant-discharging ends of the conduits are slightly elevated, relative to orifices in the reservoir from whence the conduits are supplied with lubricant, in order that the conduits will always retain therein a head or supply of lubricant immediately releasable therefrom upon any small quantity of lubricant being added to the reservoir.

Abstract: In the embodiment of the invention as depicted, the same comprising a rotary compressor, a channel or passageway is provided in the machine to communicate two variable volume chambers which are formed by rotary pistons and walls of the compressor housing, to equalize pressure in the two chambers. The purpose here is to prevent one chamber from pre-compressing before the other, so that a small pocket formed between the rotors by the inter-engaging teeth will not come up to pressure, and be expanded back into the inlet, to avoid a clearance loss and a waste of horsepower.