US575688A - Pipe-cutter - Google Patents

Description

(No Model.)A

A. BQ BROGKBTT. PIPE GUTTER.

Patented Jam-26, 189,7.

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ATWATER E. BROOKETT, OF EVERETT, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO WILLIAM G. NIXON, OF BRAINTREE, MASSACHUSETTS.

PIPE-CUTTER.

SPECIFICATION forming part of Letters Patent No. 575,688, dated January 26, 1897.

Application filed April 6, 1896. Serial No. 586,333. (No model.)

To all whom it may concern.-

Beit known that I, ATWATER E. BROCKETT, of Everett, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Pipe-Cutters, of which the following is a specification.

My invention relates to that class of tools in which there is a bed-piece provided with a suitable back-rest carrying a cutter-tool and having a screw-handle or other means of adjusting the cutting-tools or rolls toward and from said back-rest. As a rule one cutter and two rolls are used in pipe-cutters, but it is often necessary to substitute for the two rolls two cutters, and it has been found eX- tremely inconvenient to make this change in all the pipe-cutters of this description in regard to which I have knowledge.

My invention consists, primarily, in a double-faced tool-holder adapted to be used with such a pipe-cutter, one face of said tool-holder carrying suitable rolls and the other suitable cutters, the tool-holder being so constructed as to be easily removed from the bed-piece in which it sits and reversed, as will be clearly understood from the description below.

My invention also consists in certain details of construction embodied also in this too1-cutter,which will be more fully described below.

In the drawings, Figure 1 is a side elevation of a cutter embodying my invention, Fig. 2 being a longitudinal section; Fig. 3, a section on line 3 3 of, Fig. 2; Fig. 4, a section on line 4 4 of Fig. 2; Fig. 5, a section on line 5 5 of Fig. 2, and Fig. 6 a section on line 6 6 of Fig. 2.

A is a bed-piece, at one end of which is a back-rest a. Thisbed-piece is chambered, as shown at ct', and is provided on its floor with a rack a2, as shown in Fig. 2. Each side of the chamber is provided with Ways a3.

l B is a sliding post whichv carries a screwi handle C, at the front end of which is the tooleholder D.

The post B is provided with grooves b, adapted to fit on the ways a3, so that it may slide toward and from the backhrest a and serve for purposes of rough adjustment of the tools. The post is locked by means of the rack a2 and the chambered pawl b', which has a vertical movement in the post and is held down against the rack by means of a spring b2, which sits in its chamber, (see Fig. 2,) the upper end of the spring bearing against the under side of an extension of the post and being held in place by a stud b3.

h4 are finger-pieces forming part of the pawl, by means of which it may be lifted out of engagement with the rack against the force of the spring h2, which tends to keep it locked. The screw-handle O has at its front end a forked piece E, the ends of which project into suitable grooves e in the sides of the toolholder D, to which it is attached by means of a pin e', which passes through each arm of the fork and through thetool-support D.

The tool-support D is adapted to rest upon the upper surface of the bed A and extends below this surface to engage with the ways CL3 within the chambered portion of the bed, for which purpose it is provided with grooves d. In the back-rest d is a rotary cutter d4 or other tool, and, as shown, the tool-holder D is provided with two pairs of tools, one pair of tools being located in each face of the tool-holder, the tools d' in the drawings being rotary cutters and the tools d2 being rolls.

To use my tool, the work is placed in posi tion against the tool CL4, and the post B is pushed forward until the tools in the face of the tool-support D engage with the work, the pawl b riding over the teeth of the rack CL2 and engaging with one of the teeth. Fur* ther adjustment of the tool is caused by turning the screw-handle C until sufficient pressure clamps the work in place, after which the toolis oscillated in the usual man ner. When it is desired to withdraw the tool, the pawl b is raised and the post B, with the tool-support D, is withdrawn.

lf it is desired to use the tools cl2 instead of the tools d', the pawl h is lifted and the post B and tool-support D are withdrawn entirely from the bed A. The pin e is then`removed and the toolsupport D slid off from the forked piece E. The tool is then reversed, so that the forked piece E will enter the other ends of the grooves e, and when in position again,

so that the central hole registers with the holes 1 oo in the forked piece E, the pin e is replaced and the tool-support D and post B are again slid into the bedpieee A.

I prefer to hold the tool-spindles in place in the following manner: One end of cach spindle d3 fits into a hole or socket di in one wall of the tool-support D. The front edge of the other wall of the tool-support is provided with an angular opening d5, into which the angular end of the spindle cl3 fits. I prefer to make one end of the spindle angular to fit an angular opening d5, in order that the spindle may be prevented from turning. An angle-piece F is pinned at f to the upper part of the tool-support. It is formed with a flange properly shaped to close the open side of the angular opening d, and also cut away to alle7 the forked piece E to have free access to grooves c. An ear j" projects back from the front of the piece l11 and is provided with a hole adapted to register with the holes through the tool-support, so that the pin e will hold the forked piece and tool-support together and at the same time keep the tool-spindles in place. The rotation of the tool-spindle is very apt to take place after the tools have been used for a little while, and as the toolsupport is but made of malleable iron each spindle will soon wear a large hole for itself and cease to run true unless some means is provided to prevent this rotation.

I consider the manner above described of keeping the tool-spindles from rotating of great importance, as it is simple and saves the expense and trouble of using screws for this purpose. I prefer to hold the cutter d in place in a similar manner. This eonstruetion is exceedingly simple and convenient. Its value will be at once appreciated by all who use pipe-cutters, as it has always taken considerable time to change the tools in all forms of pipe-cutter of which I have knowledge. It is evident that with one bed-piece l A tools of various sizes and shapes may be utilized by having a number of tool-supports D, each adapted to fit the ways a3 and yokepiece E and each provided with different sets of tools. It is also evident that other means may be provided for attaching the screw-handle and the tool-support such that a reversible tool-holder may be used, but the construction which I have shown and described now seems to me the simplest.

Vhat I claim as my invention isl. In a pipe-cutter provided with a chainbered bed-piece having a back-rest and a suitable post carrying a tool-handle, a doublesided reversible tool-carriage carrying two sets of tools, said carriage being detaehably attached to said tool-handle and adapted to be moved thereby toward and from said backrest, and to have its position on said handle reversed whereby either set of tools in said carriage may be used at will, all as setforth.

2. In a pipe-cutter having a tool-carrying back-rest and a post, a screw-handle lying in said post and provided at the front end with a forked piece, in combination with a doublefaced tool-support carrying two sets of tools and adapted to be detachably held between the prongs of said forked piece, whichever set of tools is in action, all as set forth.

8. A tool-holder carryinga rotary tool and having sockets for the spindle of said tool, one of which is angular, and a tool-spind1e, one end of which is angular and adapted to lit said socket, in combination with a ilangepiece mounted on said tool-support and adapted to close one side of one of said sockets, all as set forth.

In testimony whereof I have hereunto set my hand this 24th day of February, 1896.

ATWATER E. BROCKE'l"`. lVitnesses:

GEORGE O. G. Conua, Eva A. GUILD.

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