Abstract: Disclosed is a method of measuring the depletion of basic additives in a lubricating oil. A sensor is immersed into the oil, an electric current is passed through the sensor, and the resistance of the sensor is measured. The sensor is made of copper, lead, mixtures of copper and lead, copper alloys, lead alloys, or mixtures thereof. Also disclosed is apparatus for indicating when the basic additives in a lubricating oil have been depleted. The apparatus consists of a sensor which is immersed in the oil, a first pair of electrodes for passing an electric current through the sensor, a second pair of electrodes for measuring the electrical resistance of the sensor, and an indicator for indicating when the electrical resistance has increased to a predetermined amount.

Abstract: Refrigeration systems comprising a chemically and thermally stable lubricating composition having high lubricity under all operating conditions comprising (a) fluorochlorocarbon refrigerant, (b) hydrofined base oils, alkylated aromatics or refrigerator oils and (c) selected chlorinated fluorinated and/or fluoralkylated aromatics including unsubstituted and alkyl substituted chlorinated biphenyls, chlorinated polyphenyls, and chlorinated diphenyl ethers, and particularly dodecylmonochlorodiphenyloxide.

Abstract: A compressor refrigeration system employing a halocarbon refrigerant, has a lubricant composition in contact with the halocarbon refrigerant over the expected temperature range of the system, the lubricant composition having lubricity and chemical and thermal stability in the presence of halocarbon refrigerant at temperatures of up to at least 130.degree. C., the lubricant composition comprising a thermally stable oil with minor amounts of an alkyl polyhalophenyl ether.

Abstract: An oil resistant tubular fuse is taught for submersion in a hot oil bath. An epoxy resin seal is provided between one portion of a fuse ferrule and an annular groove in the fuse body. Alternatively the epoxy resin seal may be disposed between flared portions of the ferrule and an unscored portion of the tubular body. In both cases the adhesive characteristics of the epoxy are such that the seal retains its sealing capabilities in a temperature range from -40.degree. C. to +150.degree. C.

Abstract: A process for making a oil resistant tubular fuse for submersion in a hot oil bath is taught. An epoxy resin seal is provided between one portion of a fuse ferrule and an annular groove in the fuse body. Alternatively the epoxy resin seal may be disposed between flared portions of the ferrule and an unscored portion of the tubular body. In both cases the adhesive characteristics of the epoxy are such that the seal retains its sealing capabilities in a temperature range from -40.degree. C. to +150.degree. C.

Abstract: A metal casting, containing connected pores, is impregnated with a halocarbon resistant barrier resin, consisting essentially of the admixture of a polyester resin, and from about 1 wt. % to about 70 wt. % of a polyfunctional monomer modifier selected from the group consisting of trimethylolpropane triacrylate, divinyl benzene, pentaerythritol triacrylate or their mixtures, which after curing provides a casting which is resistant to chemical and solvent attack by chlorodifluoromethane and dichlorodifluoromethane and which is impervious to gases and liquids.

Abstract: A centrifugal compressor refrigeration system is made, employing a halocarbon gas refrigerant in contact with a lubricant composition comprising 100 parts of castor oil and from 20 parts to 110 parts of a chemically and thermally stable, low viscosity blending fluid, soluble in castor oil; wherein the halocarbon gas is only slightly soluble in the lubricant composition, which provides good lubricity over the expected temperatures and operating conditions of the refrigeration system and is highly resistant to chemical reaction with the halocarbon and/or materials in the refrigeration system.

Abstract: Reliability of power circuit breakers and other equipment containing parts subjected to an environment of arced sulfur hexafluoride is improved by using a cycloaliphatic epoxy resin filled with aluminum trihydrate and thickened with finely divided, highly dispersed aluminum oxide (alumina).

Abstract: An extrudable, oil-permeated wicking material, for use in lubricating sleeve metal bearings, is made from a mass of steam-pressure-splayed, swollen, lignin-containing, dried, wood fibers, and a contained lubricating oil; where the weight ratio of oil:lignin containing wood fibers is from about 8:1 to about 3:1, and the oil is contained in microcapillary voids in contact with the lignin.