US104785A

US104785A - Improvement in the manufacture of steel-headed horseshoe-nalls

Info

Publication number: US104785A
Authority: US
Publication date: 1870-06-28
Anticipated expiration: 1887-06-28

Description

J. H. SMITH. MANUFACTURE 0E STEEL HEADED HORSESHOE NAILS. No. 104,785.

Patented June 28, 1870;

DDS 555 EBB E D EDD iDD SEQ To all whom it may concern:

JOHN HENRY SMITH. on ALLEGHENY Owl PENNSYLVANIA,

IMPROVEMENT IN THE MANUFACTUREOF STEEL-H EADED HORSESHO ENAILS.

Specification forming part of Letters Batent N0. 104,785,1lated June 28, 1870.

Be it known that I, JOHN HENRY SMITH, of the city and county ofAllegheny, and State of Pennsylvania, have invented a certain new:

and useful improve1nent,' namely, a ne'wartiole of manufacture-via, wrought-iron horseshoe-nails the heads of which'are converted into steel; and I do 3 hereby declare that the following is afull, clear, and exact description.

thereof. 7

The nature of my invention consists inmak in ganewarticle of manufacture v1z.,wrough tiron horseshoe-nails the heads Q converted intosteel. 7 v i i To enable others skilled in the art to make and use my invention, I will proceed to 'de-' f which are scribe more fully the new article of manufacture, and the means for makingthe same.

I make horseshoe-nails of a good article of wrought-iron, and of any 'of the known forms,

7 and by any known means. I then convert the heads of then'ails into; steel by the process of I cementationfl or by any other suitable or known means.

1] I will now give a brief description of-a pro- 5 cess whcrebyzthe heads of the nails may, with ease and facility, be'converted into steel.

In the accompanying drawing, Figure 1 is a" top-view or plan of the lower part of a cementing-chest with the horseshoe-nails embedded in it. Fig. 2 is a transverse section of the cementing-chest with nails embedded in it, and their heads covered with the material for converting them into steel.

The lower part, A, of the cementingchest is packed with loam or other suitable matter,

into which are forced the shanks of the nails, leaving their heads f exposed or projecting above the loam O in the part A of the chest. I then place-theuppcr part, B, of the chest on the part A, and-fill it with pulverized char coal, D,-packing it closely around the heads of 'thenails.

'The charcoal is pulverized and wet with a solution consisting of water in which nitrate of-soda is dissolved. One pound of the nitrate 'ofsoda dissolved in ten gallons of water will besufiicient for wetting one ton of the pulvervized'charc'oal,which will be enough to .convert in to steel the heads of about two tons of nails, @The charcoal, afteri-t. has been wet with the solution, shouldlbepartially dried before cov-' ering the heads ofthe nails with it.

. Having the nails embedded ,in thecementing-chest, asi represented in the accompanying.

drawing, the lid this. properly secured on the .chest. It is then placed in a heatingfurnace,

and subjected to a high de gree of heat for from ten to fifteen hours. The chest is then removed flOlIL the furnace, and it, and" its contents allowed to gradually cool ofi, after which the nails are removed, the heads of which will be found to be converted into steel, which may be, if desired, tempered and hardened by the ordinary means used for that purpose.

The advantage of my improvement consists in making the heads of thenails stronger and i more durable, and the shanks'of the nails more ductile, and ofgrcater tensile strength.

Having thus described my improvement,

whatl claim as of my invention is-' A new article of manufacture-via, .a wrought-iron horseshoe-nail the head of which is converted into steel, substantially as i herein described.

JOHN HENRY SMITH. Witnesses JAMES J. JOHNSTON, J As. G. Tiuo-lvrrsoiv.