US249966A - Fbancis i - Google Patents

Description

(No Model.)

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NTTED STATES PATENT OFFICE.

FRANCIS I. MAULE, OF PHILADELPHIA, PENNSYLVANIA.

PIPE-CUTTING IM PLEM ENT.

SPECIFICATION forming part of Letters Pate-nt No. 249,966, dated November 22, 1881.

Application filed October 3, 1881. (No model.)

To all whom it may concern:

Beit known that I, FRANoIs I. MAULE, a citizen ofthe United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Pipe-Cutting Implements,of which the following is a specification.

My invention relates to certain improvements in the class ofpipe-cutting tools ofwhieh that described in my PatentNo. 225,403, March 9,1880, is an example, and the object of my improvements, which are fully described hereinafter, is economy in the construction of the tool.

In the accompanying drawings, Figure l is a side View, partly in section, of my improved pipe-cutting tool; Fig. 2, a section on the line l 2, and Fig. 3 a section on the line 3 4.

The bent end a of the head A of the tool, with its angular piece b of hardened steel, constitutes theja-W against which the pipe tofybe cut is forced, and by whichit is prevented from turning, the bead itself` being preferably made of malleable cast-iron, and the portion d of the head being madein the form of a hollow cylinder, within which a cylindrical block, c, lits snugly, but so as to slide freely, but is prevented from turning by the end of a set-screw, f, the latter extending into a longitudinal groove in the block. The cylindrical portion d ofthe head is threaded internally at one end for the reception of the threaded end h of the nut B, which is screwed tight into its place, so as to become a permanent part of the head, being retained, it' desired, by a suitable transverse pin or bolt. The nut is threaded internally throughout a portion of its length, this portion being adapted to the threaded part t' ofthe rod D, and the remaining portion ofthe interior Iof the nut being plain or Unthreaded, so as to serve as a guide for the rod and prevent the exertion of undue strain on the threaded portions of the nut and rod in manipulating the tool.

In the outer end of the block c is a slot for receiving the rotary cutter m, which turns on a pin, a, passing through the block.

The objectin making the tool in the peculiar manner described is economy in construction.

Au accurate fit of the block e in the cylindrical portion of the head is insured by boring the latter and turning the former, and it is Well known to practical machinists that these operations-turningandboring-arethecheapest of all machine-shop processes, the cost of production being always increased by milling or planing' objects one of which has to t accurately-into the oth er, and still further increased when recourse is had to manipulative operations, such as filing or chipping.

A peculiar manner of making the handle G of the rod D and securing it to the latter is lanother economical feature of my invention.

This handle is made of cast-iron, is hollow, partly for insuring lightness, is elongated, as shown in Fig. 3, and is rounded on the edges and ends. A mold is made in sand to accord with this handle, and the end portion of the rod having been introduced into the mold the molten metal is cast in the same. The rod, prior to its insertion in the mold, is flattened at the end w, so as to form a dovetaihwhich is embraced by the metal on one side of the handle, the metal on the opposite side embracing the rod at y and serving t-o relieve the dovetail from undue strains.

The manner of using'the implement in severing tubes will be readily understood Without Y explanation.

I claim as my invention-- 1. The combination of the head, its cyliudrical portion d, and cylindrical block e, with the nut B, adapted to be screwed into the said cylindrical portion of the block, and the threaded rod D, adapted to the internal thread of the nut, all substantially as specied.

2. The combination of the rod D, threaded at its upper end and flared or flattened at its lowerend,with the hollow handle G,castaround andembracing the dared end of the rod, as

Aset forth.

I FRANCIS I. MAULE. Witnesses HARRY DRURY, HARRY SMITH.

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