US280134A - Thomas colgaf - Google Patents

Description

. UNITED STATES PATENT OFFICEQ THOMAS COLGAN, or BROOKLYN, NEW YORK.

LUBRICANT FOR'STEAM-CYLINDERS.

SPECIFICATION forming part of Letters Patent No. 280,134, dated June 26, 1883.

Application filed December 9, 1882. (No specimens.)

To all whom it may concern:

Be it known that I, THOMAS COLGAN, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Lubricants for Steam-Cylinders and I do hereby declare that the following is a full and exact description thereof.

My inventionrelates to a lubricant specially adapted for the valves and cylinders of steamengines, as an improved substitute for the cylinder-oils now in use.

The object of said invention is to obtain a durable lubricant in solid form entirely free from gum, and which shall possess such cleansing qualities as that it will render and keep the bearings constantly bright and clean;

It'consists in the addition of beeswax to a compound of petroleum, parafiine, and plumbago, prepared substantially in the following manner and proportions The petroleum is first condensed by heating and agitating it for two or three hours (more or less) until its more volatile constituents are evaporated therefrom. In this process the oil may be heated to the boiling-point. To this condensed petroleum, while yet hot, I add beeswax, paraffine, and finely-pulverized plumbago, in about the proportions of sixteen ounces petroleum, one to eight ounces of beeswax, one to eight ounces of parafline, and one to eight ounces of plumbago, the proportions being varied according to the density required in the product, and which is determined, to some extent, by the market in which it is to be sold, whether in a cold or hot climate. The compound is kept in steam valves and cylinders.

hot and thoroughly agitated during the process of admixture to insure an intimate combination of its elements, and is then poured into molds, preferably spherical in form and of various sizes, and allowed to solidify therein. When cold, the lubricating compound becomes hard and solid, and for use these solid balls are dropped into the lubricating-cups of the engine, where the heat will melt them as required.-

My Letters Patent N 0. 241,932, of May 24,

1881, describe a lubricating compound composed of petroleum, paraffine, and plumbago;

admixed in substantially the proportions set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS COLGAN.

WVitnesses: J. F. ACKER, J r., DAVID A. BURR.