US1035868A - Lubricating emulsion. - Google Patents

Description

'- UNITE STATES earn o rica. j

EDWIN A. EMERY, 01? DENVER, COLOI RADOJASSIGNOR TO THE-'EMERY PNEUMATIC 'LUIBBICATOB. COMPANY, A CORPORATION OF COLORADO.

No Drawing.

To all whom it may concern:

,, Be itmknown that I, EDWIN A. EMERY, a

citizenof the United States, residing at Denver,in the county of Denver and State of Colorado, have invented new and useful Improvements in Lubricating Emulsions, of which the following is a specification.

This invention relates to lubricants for apparatus operated by compressed air and more particularly instances where leather is employed as packing in machinery of this class, such as pistons of cylinders in air brake apparatus, and the like.

One of the objects of my invention is to provide an improved lubricant emulsion of a soft or semi-fluid consistency which may be readily applied to the cylinders or other parts of pneumatic apparatus and having the properties ofaflinity for and solubility in the moisture of'the compressed air, and

adapted to be distributed by the action of such air over the surfaces to be lubricated.

-Another object of my improvementis to provide va lubricant emulsion adapted to have a cleansing effect upon the packing leathers and other parts to which it is applied, to permeate the leather or other packing material used under the action of the air pressure, to fill the pores therein, to prevent the hardening or drying of the same, and to form a coating upon the wearin surface thereof whereby the efliciency and life of the packing is'greatly increased.

A preferred composition of lubricant may comprise an ingredient such as saponaceous matter soluble in the moisture of the air, a non-refrigerant and leatherv softening 1ngredient having an al finity for moisture,

such as glycerin, a finely divided insoluble ingredient, such as amorphous graphite, or powdered soapstone, adapted to fill the pores of the leather and form a coating thereon to preserve same and increase wearing qualities, and a sufiicient quantity of mineral lubricating oil to give a soft or semi-fluid consistency such as is desirable in this class of lubricants. It will of course be understood that any other equivalent ingredients having the, desired properties may be employed in lieu of those s ecifically named herein.

It is desira le that the saponaoeous matter employed should be soft and plastic and also retain a suitable degree of solubility, and for this purpose I prefer to use animal fats or vegetable oils, or acombination of Specification of Letters Patent.

Patented Aug. 20, 1912.

Application filed June 23, 1909. Serial No. 503,928.

both, reduced to a saponaceous condition with a caustic potash solution.

A preferred method of making the'lubricant is as follows z-Melt together about equalportions of tallow and cottonseed oil at about 180 F., making 12 or more parts; then mix about 14 parts of caustic potash solution (about 22 Baum) with about 22 parts glycerin and add the mixture slowly to the, melted tallow and cottonseed. oil until saponification occurs, then heat about 50 parts of mineral lubricating oil, of suitable [body to give the desired consistency, to the same temperature as the mass and mix together slowly; this amount of oil'will give a fluid body to the mass and add to its lubrifound that this-produces a smooth emulsion in which the soap and glycerin act as a inenstruum for supporting the mineral oil and'the graphite. The mineral oil should have a specific gravity of about .85 or .90 and a viscosity. approximating that of cylinder oil. A mixture of equal parts of Atlantic red engine oil, cylinder stock and paralliu oil serves admlrably for this purpose. The lubricant then cools as a semi-fluid mass and is ready for use by being injected into the cylinders or other parts of the pneumatic machinery, or it may be placed directly in the groove formed in the piston for the expander ring, also by coating the cylinder walls, or applied in any other way as desired.

- The lycerin present in my lubricant is in decide excess of the quantity of glycerin liberated as the chemical equivalent of the fatty acids in the soap produced by saponificat-ion and is present in such amount as to enable it to act as a non-refrigerant preventing the lubricant from becoming hard or stiff even at low. temperatures. It also serves to attractthe moisture of the air-.to

the mass for dissolving the saponaceous matter, prevents drying out and keeps the leather soft and pliable. The graphite serves to fill the pores of the leather and ultimately forms a sort of coating on the wearing surface thereof, which prot ects the leather, tak es the wear and greatly increases the efiiciency and life of the packing.

The mineral lubricating oil should be prepared of the proper consistency before adding to the mass and a satisfactory oil for this purpose may be obtained by mixing about equal parts of a heavy mineral oil such as cylinder stock With a lighter variety.

After the lubricant is applied in position for use it is subjected to the action of the compressed airemployed in operating the apparatus and the glycerin attracts moisture in the air to the lubricant and gradually dissolves the saponaceous ingredients thereby disintegrating the lubricant, setting free the finely divided graphite and still leaving a smooth emulsion with the oil which is forced u on and into the leather packing by means ot the air pressure. In this manner it per meates the packing leathers, the graphite filling the pores and stopping all leaks, and finally forming a permanent coating upon the leather, thereby preserving the same and increasing its durability and efficiency. In actual use my improved lubricant also has the following additional advantages; the well known property of glycerin in attracting moisture prevents the compound from hardening or drying out in the atmosphere even in hot dry climates where sufiicient moisture will be attracted to maintain the lubricant in its soft or semi-fluid condition;

this property also prevents any hardening or gumming of the lubricant upon the Working parts of the machinery. The glycerin also,

on account of its non-refrigerant propertles,

prevents any freezing or stiflening of packing leathers due to the presence of the moisture in low temperatures or tothe refrigerative effect of expansion of the air currents. The cleansing action of the saponaceous ingredients has the tendency to prevent the accumulation of dirt in the cylinders and other parts Where the lubricant is employed and thereby keeps the apparatus clean during long periods of service.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A lubricant consisting of an emulsion of mineral oil and plumbago (or graphite) in a menstruum of soap and glycerin.

2. A lubricant consisting of an emulsion of mineral oil and plumbago (or graphite) in a menstruum of a water-soluble soap and glycerin. I

3. A lubricant consisting of an emulsion of mineral oil and plumbago (or graphite) in a menstruum of potash soap and glycerin. In testimony whereof I have hereunto set my hand.

k EDWIN A. EMERY.

Witnesses IVM. M. CODY, A. M. CLEMENTS.