US273375A

US273375A - Drill-hoe point

Info

Publication number: US273375A
Authority: US
Publication date: 1883-03-06
Anticipated expiration: 1900-03-06

Description

(N0 Model.) Y

A.Y R. LUDLOW.

DRILL Hon Polm'.'A

Nq. 273,315. Patented Mar. 6, 1883.

Affili/ff l Y 7n venian N. PETERS. Phammhngnphu. wmhingmn. D4 c.

UNITED STATES PATENT OFFICE.

ABRAHAM R. LUDLOW, OF SPRINGFIELD, OHIO.

DRILL-HOE POINT.

SPECIFICATION forming part of Letters Patent No. 273,375, dated March 6, 1883.

- Application filed June 14, 1882. (No model.)

To all whom it may concern:

Be it known that I, ABRAHAM R. LUDLow, a citizen of the United States, residing at Springfield, in the county of Clarke and State ot' Ohio, have invented certain new and useful Improvements in Drill-Hoe Points; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to\make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon,which form a part of this specitication.

My invention relates to new and useful improvements in drill-hoe poi-nts, and in the manufacture of the same.-

In drill-hoes as at vpresent made the blanks are made of steel, and struck upin aformingblock, after which a hole is punched or drilled in it for the rivet with which it is attached to the tube. This inode ot' manufacture requires not only alarge outlay for the material, which is expensive, but it also requires asuccession of steps in cutting out the blank, forming it, punching or drilling the hole, countersinking it for the rivet, dsc., all of which require much time and labor.

My invention consists ot' a malleable-iron drill-hoe point having its body case-hardened and the rivet cast integral with the body, for the purposehereinafter t0 be set forth.

Figure l is a perspective view of my improved drill-hoe point. It is shown attached to the lower end df the tube of the grain-boot.

Fig. 2 is a vertical section of the same through the central longitudinal line of the hoe and tube. Fig. 3 is a vertical section of the hoepoint cast in one piece with its own rivet, the lower end being broken o". Fig. et is a top view of a drill-hoe point entire of the same kind as that seen in Fig. 3.

a is the hoe-point, (shown'in Figs. 1 and 2,) attached by rivet c to the tube b. In these figures it is shown as thelinished product, ground and case-hardened or tempered.

In Fig. v3 the hoe-point a is shown detached from the tube, and shows more particularly the rivet-shank d cast upon it. In the process of annealing and case-hardening or tempering this is left in its soft or annealed condition to allowitto beeasilyriveteddown upon theinside of the tube b when attached thereto. This construction of the drill-hoe point, having the rivet made integral with the same, possesses the still further advantage of having the front 0r wearing surface unbr0ken,and the liability to wearing oft' ofthe rivet-head and loosening of the point obviated.

The 'drill-hoe point seen in Fig. 4 is in its unfinished state as it is taken from the molds, being neither case-hardened nor ground.

I ann aware that malleableiron shovels, spoons, Svc., have been made with lugs and projections formed of the same material, but am not aware that malleable-iron drill-points have ever been case-hardened and provided with an annealed or soft rivet for attaching it to the tube. Therefore,

What I claim is- A malleable-iron drill-point havin g its'bod y vcase-hardened and the rivet ot' soft or annealed -iron cast integral with the body,

for the purpose set forth.

In testimony whereof I affix my signature in presence ot' two witnesses.

ABRAHAM R. LUDLOW. Witnesses:

G. M. GRIDLEY, B. C. CoN'vERsE.