US232634A - Gage-chisel for wood-turning - Google Patents

Description

(80 Model.)-

T. S. DURGIN.

X X /i NE55Es INVEN UK;

'. Mamas iii.

U ITED STATES Fries.

PATENT GAGE-CHISEL FOR WOOD-TURNING.

SPECIFICATION forming part of Letters Patent No. 232,634, dated September 28, 1880,

Application filed July 15, 1880.

To all whom it may concern:

Be it known that I, THOMAS S. DURGIN, of Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in (-lrage-Ohisels for Wood-Turning; and I declare the following to be a description of my said invention sufficiently full, clear, and'exaet to enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The object of my invention is to provide a simple, convenient, and serviceable tool for wood-turnin g, whereby cylindrical pieces and round tenons can be gaged and turned to uni.- form size by the simple action of the chisel, and without the inconvenience of ealiperin g or measuring each piece turned. I. attain this object by means of the chisel or tool constructed and operating as herein shown and described.

In the drawings, Figure 1 represents a side view of my improved gage-chisel. Fig. 2 is a top view of the same. Fig. 3 is a front-end view of the same. Fig. 4: is a plan view of the blade, and Fig. 5 shows a modification in construction which might in some cases be adopted.

My improved gagechisel is composed of a bar or supportingpiece, A, fitted with a suit able handle, B, and having a flattened front end or guiding-projection, A, with a slightlyrounded corner at a, while a stud or projecting arm, A extends upward from said bar A and supports the cutting-blade O, which is retained by means of the adjustable jaws D D, in the manner illustrated.

The jaw D is fitted to slide up and down on the stud A and is provided with a set-screw, cl, whereby it can be held at any desired position.

The jaw D" is retained to the jaw D by means of the screw F, which passes up through the jaw D and .screws into the jaw D, as shown.

A set-screw, G, is fitted in the rear part of the jaw D, which turns down against the rear end of the part D.

(No model.)

The blade 0 is clamped between the jaws D D by the aid of the screws F and G.

The cutter G is made with a curved edge, at C, for general turning to size; but for cutting tenons and similar work a straight cutter would be used, and for special classes of work variously-formed cutters maybe employed, the cutter being readily changed as desired.

The cutter can be adjusted forward or back between the jaws D D, and said jaws can be adjusted up and down on the stud A for carrying the cutter farther from or nearer to the part A of the bar A.

The chisel is used by placing the projecting portion A beneath the piece to be turned (see dotted circle m, Fig. l) and then pressing forward until the piece is sufficiently reduced to pass under the blade 0 and strike against the stud A (See circle y, Fig. 1.)

The distance between the edge of the blade.

0 and the surface of the guide-bar A gives the gage required, and no measurement is necessary other than to keep the bar A up against the piece operated upon during the time it is being turned.

The rounded edge a and curved part of the blade, G, permit of the chisel being moved along the piece parallel wit-h its axis of revolution after one portion has been reduced to the desired size, thus rapidly turning long pieces to uniform size.

In lieu of making the cutter-holding jaws adjustable on a stud, A fixed to the bar A, the cutter could be attached to the end of the stud, and the stud made adjustable through the bar, as indicated in Fig. 5. I prefer, however, the method above described, as being the most convenient and practical form for service.

What I claim as of my invention, and desire to secure by-Letters Patent, is

1. A gage-chisel or tool for wood-turning, consisting of the handle-bar A, having forward-projecting guiding-end A, and upwardly-projectiug arm A provided with an adjustably-attached head or jaw, adapted to receive and support the removable blade or cut ter G, substantially as set forth.

2. The combination, with the handled bar

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