US94932A - Improvement in carriage-axles - Google Patents

Description

N lbbttte' tatrt vand fed to the journal through JOSEPH E. WILSONQOE- PHILADELPHIA, PENNSYLVANIA, ASSIGNOE "IO ELEANOR WILSON, OF SAME PLAGE, AND HENRY M. EILE, OE WILMINGTON, DELAWARE.

Letters Patent No. $111,932, dated` September 14, 1869.

i IMPROVEMENT IN CARRIAGE-AXLES.

The Schedule referred to in these Letters Patent and making part of the same.

To Aill whom 'it may concern .v .V 4

Be it known that I, JOSEPH B. WILSON, of Philadelphia, Pennsylvania, have invented anl Improvement in the Manufacture of Axles for Vehicles; and I do hereby declare the followingy to be a full, clear, and

, exact descliption of the same.

My invention consists of a hollow axle, cast in a mould, and afterwards so annealed and hardened that it shall be tough, malleable, and capable ot resisting as great or greater strains :1s-axles made of the best nought-iron or steel, all of which is fully described hereafter.

In order to enable others Skilled in the art to make and apply my invention, I` will now proceed to describe the mode of carrying the Same into eect, reference being had to the laccompanying drawing, which'forrns a part of this specification, and in which- Figure 1y is a perspective vielw of a portion of an axle made according to my invention, and l Figure 2, a sectional view of the same.

The axle Shown lin the drawing consists of ,three main portions: the hollow journal A, capped at its Outer end by a Screw-pllig, a, the Shoulder B, consisting of a Solid mass ot metal arranged at the point of greatest strain, and the central box-like portion G,

into which a wooden Stock, :v,`represented by red lines in fig. 2, is intended to be inserted.

The cavity e, in the interior of' the journal, while it decreases the weight of the axle, is also `used as a receptacle for lubricating-material, the latter being in-v troduced eitherthrough a passage in the shoulder B,- or from the end Of the axle, after removing the cap a, small openings, fj, g 2

Inmanufacturing the aboveaxle, I first cast it in 4 a mould, using a hard, brittle, and comparatively cheap metal, the cavity e in the journal being formed by means of a suitable core.

After being cast, the axle is placed in an annealingfurnace, whereit is suffered to remain for from eight to ten days, this portion of the Operation rendering the axle tough, malleable, and capable ot' being bent without breaking.

For the purpose of hardening the surface of the axle, and of improving the quality of the metal, it is finally submitted to the action of a carbonizing-n'nace for from three to `five days.

I have found, by repeated experiments, that axles cast and treated in the above manner are fully. as tough and able to resist as great or greater strains as axles madeof the best wrought-iron or Steel, while their cost is considerably less than One-half of that of either of the latter. l

Although in describing my improvement, I have illustrated but one form of hollow axle, it will be evident that this form may be varied without departing from Vmy invention.

I therefore claim as my invention, and desire to secure by Letters Patent, as a new article of manufacture- A hollow axle, cast, annealed, and hardened, substantially as and for the purpose herein set forth.

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

JOSEPH B. WILSON Witnesses:

v JOHN WHITE,

.HARRY SMITH.

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