Abstract: In a rotary compressor having a motor element and a compression element contained in a sealing case, an oil separating device for separating lubricating oil from an oil-containing refrigerant is attached on the rotor of the motor element. The oil separating device has a circular plate having a diameter substantially equal to the outer diameter of the rotor, wherein a channel-like recess projecting toward the rotor is formed in the circular plate at a position deviated from its central portion; the lower surface of the channel-like recess is adapted to be firmly connected to the upper surface of the rotor, and an aperture is formed at the central portion so that the discharge tube is loosely inserted in the aperture.

Abstract: A hermetic motor compressor including a closed housing which covers motor and compressor means; and a partition wall which separates a lower temperature compartment in which at least part of a motor is held and a recycling coolant is fed through an inlet port formed on said housing; and a higher temperature compartment in which a compressor and a coolant muffler and a loop part of an outlet pipe are held.

Abstract: Occurence of crevice corrosion on metal surfaces in crevices is prevented by providing an anti-crevice corrosion sealant which comprises a rubbery substrate containing 5-350% by weight of fine zinc powder, 20-100% by weight of magnesium oxide, and 20-200% by weight of electrostatically charged fine graphite powder, each on the basis of the rubbery substrate, in the crevices between parts of stainless steel articles or aluminum alloy articles.

Abstract: A rolling mill in which rolls are displaced in axial direction thereof during operation in dependence on the width, profile and the like factors of a material being rolled. A real rolling load difference is derived by removing a rolling load change components due to a moment produced upon displacement of the rolls from a difference in the rolling load between an operating side and a driving side of the rolling mill, and is utilized for correcting the rolling asymmetry.

Abstract: A pair of upper and lower work rolls are supported by metal chocks provided with roll bending devices, and backup rolls are supported by metal chocks which may be movable in the axial direction. The backup rolls may be displaced in the axial direction so as to vary the length of line of contact between the work rolls and the backup rolls to control the distribution of rolling pressure transmitted from the backup rolls to the work rolls, whereby the sectional dimension may be controlled jointly using the bending forces of the work rolls.

Abstract: A shape control system for a rolling mill comprises means for operating a roll positioning means to press down the rolls under a preselected load, when no strip to be rolled is fed between the rolls; a calculator of roll position variation for comparing the roll position under the preselected load with a preselected reference roll position; a calculator of roll crown variation for calculating the roll crown variation by using the output from said calculator of roll position variation and a preselected functional relationship; and a calculator of roll bending force for calculating the amount of a roll bending force to be corrected based on the output from said calculator of roll crown variation and feeding the thus calculated correction to roll bender control means.