US465415A - Pipe-cutter - Google Patents

Description

(No Model.)

G. F. POTTLE.

PIPE CUTTER.

No; 455,415. Patented Dec. 15, 1891.

WITNESSES UNITED STATES PATENT OFFICE.

GEORGE FRANK IOTTLE, OF MEDFORD, MASSACHUSETTS.

PIPE-CUTTER.

SPECIFICATION forming part of Letters Patent No. 465,415, dated December 15, 1891.

I Application filed May 5, 1890. Serial No. 350,686. (No model.)

To all whom it may concern: by giving to the springs R a greater or less 50 Be it known that I, GEORGE FRANK POT- TLE, of Medford, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Pipe-Cutters, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to that class of devices known as pipe-cutters for cutting off iron, brass, and other pipe; and its object is to improve the construction of these devices, as herein set forth. This object I attain by the inechanisinshown in the accompanying drawings, in which Figure 1 is an elevation of my device. Fig. 2 is a vertical longitudinal section of the 7 same. Fig. 3 is a cross section taken on line 00 0c of Fig. 2.

In the drawings, A A A represent the body.

or frame of the cutter, A being the pipe-holding end, and is to be shaped substantially as shown in Figs. 1 and 2, soas to form a good resting-place for the pipe P, which is to be operated upon.

A is the shank end of the frame and has a socket S to receive the shank or handle S, Fig. 2.

S is an internal screw adapted to receive the screw part of the handle S.

B is a sliding block adapted, to hold the knife or cutting-tool K. This blockis forced forward by turning the screw-handle. The cutting-tool K is held firmly in place by means of a clamping-key L, Fig. 3, the clampingplate L, and the clamp-screws T T.

B represents a second sliding block, which, when the tool is in use, is forced against the pipe to be cut by the thrust of springs R,

interposed between this block B and the block B.

It is desirable that for difierent weights and kinds of pipea greater or less degree of initial stiffness should be given to the springcushion formed by the springs, as above described, and for this purpose I have provided adjusting-rods N N, connecting the blocks B and B', by turning which rods the two blocks can be brought-together or separated,'theredegree of initial stiffness.

prevent the tool from jumping ahead when it strikes a thin place in the work, it is obvious that in the case of stock of diiferent thicknesses, where differentdegrees of force may have to be applied to the cutting-tool and its carrying block in order to do the work,

it is very desirable that the initial tension or stiffness of the spring should be variable and the combination of the two sliding blocks, with their interposed springs and adj ustingrods, I believe to be a valuable improvement for this purpose.

It will be understood that the block B is provided with a suitable slot or passage through which the cutting-tool K may pass freely.

To cause the cutting-tool to act upon 'the pipe, the block B is forced forward by the screw S, and as the springs R R yield, the blockB' will become stationary, but resting firmly against the pipe. of the block B will cause the cutting-tool K to engage with the pipe, and as the cutter is revolved around the pipe the cutting action will take place. As the channel made by the toolis deepened, the tool is advanced by shoving forward of the block B, and the channel is made still deeper until it extends entirely 8 through the pipe.

I claim- In an adjustable tension pipe cutter of the character described, the combination, withthe body or frame and the operating screwrod S, of the two-part sliding tool-carrier consisting of the block B, to which the tool is secured, the supplementary block B, slot-ted to allow the passage of the tool, springs R, interposed between the said bl'ocks B B and ad- 3' listing-rods N, whereby the distance between the blocks may be varied to adjust the ten sion of the springs, all substantially as set forth.

GEORGE FRANK POTTLE.

Witnesses:

FRANK G. PARKER, WILLIAM EDsoN.

As the function of these springs is to act as a cushion and This forward motion It is hereby certified that Letters Patent No. 465,415, granted December 15, 1891,

upon the application of George Frank Pottle, of Medford, Massachusetts, for an improvement in Pipe-Cutters, was erroneously issued to the said Pottle as owner of said invention; that said Letters Patent should have been issued to Jott Grant, of Boston, Massachusetts, said Grant being assignee of the entire interest in said invention as shown by the assignments of record in this Office; and that said Letters Patent should be read with this correction therein that the same may conform to the record of the casein the Patent Office. 7

Signed, countersigned, and sealed this 19th day of AprihA. D. 1892.

[SEAL] CYRUS BUssnY,

Assfit'tmt Secretary of thelntem'or.

Gountersigned:

W. E. SIMONDs,

Commissioner of Patents.

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