US550293A - Antifriction metal - Google Patents

Description

UNITED STATES PATENT OFFICE.

WVILLIAM N. RUMELY, OF LA PORTE, INDIANA.

ANTIFRICTION METAL.

SPECIFICATION forming part of Letters Patent No. 550,293, dated November 26, 1895.

Application filed January 7, 1895. Serial No. 534,088. (No specimens.)

To in whom it may concern.-

Be it known that 1, WILLIAM N. RUMELY, a citizen of the United States, residing in La Porte, in the county of La Porte and State of Indiana, have invented a new and useful Improvement in Antifriction Metal, of which the following is a specification.

This invention relates to an improved composition of metals producing an antifriction alloy or bearing metal.

My composition consists of the following metals, in the proportion substantially as stated: Lead, fifty-two pounds; tin, thirtyfive pounds; antimony, twelve pounds; copper, one-half pound phosphor-tin, one-fourth pound.

In'mixing I first melt the copper; then add a sufficient quantity of the tin to bring the melting-point of the mixture to a point below the melting-point of antimony. The addition of five parts of the tin, by weight, to one part of the copper will produce this result. I cool this mixture, preferably casting it for convenience into small blocks or cubes. I then melt the antimony and put these cubes into it, where they become fused with the antimony. While this second mixture is in a melted state, I add the remainder of the tin to it, and also add the lead, mixing the whole thoroughly. IVhen these are thoroughly mixed, I add the phosphor-tin. WVhen this is fused, the metal mixture is poured into suitable molds and cooled, and is then ready for use or for the market, making a most excellent antifriction alloy or metal for bearings.

I use phosphor-tin in this mixture for the convenience it aifords in adding the requisite amount of phosphorus. Instead of using phosphor-tin in the manner described, phosphorus itself may be added instead. If phosphorus is to be added instead of phosphor-tin, it should be put into the copper when the copper is melted at the beginning of the process, putting in as much as the copper will take up, and then proceed as above described, except omitting the phosphor-tin.

The proportions above given may be considerably varied, more especially as to the proportion of the lead and the tin, which may vary quite widely without changing the other ingredients, preferably increasing onefor example, the lead-in the proportion in which the other-for example, the tinis reduced.

The copper and antimony may also be varied in like manner, increasing one and di minishing the other in like proportion according to the hardness desired.

' What I claim, and desire to secure by Letters Patent, is-

The anti-friction metal composition, consisting of lead, tin, antimony, copper and phosphorus, in proportions substantially as specified.

WILLIAM N. RUMELY.

Witnesses:

OSCAR VIRITORY, WM. S. Laws.