US403031A

US403031A - Combination-tool

Info

Publication number: US403031A
Authority: US
Publication date: 1889-05-07
Anticipated expiration: 1906-05-07

Description

( No Model.)

B. K. BEGKWITH. COMBINATION TOOL.

Patented- May 7, 1889'.

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Z WITNESSES UNITED STATES PATENT OFFICE.

EUGENE K. BECKWITH, OF N IANTIC, .ASSIGN OR OF ON E-HALF TO FRANKLIN B. WVRIGHT, OF MERIDEN, CONNECTICUT.

COMBINATION=TOOL.

SPECIFICATION forming part of Letters Patent No. 403,031, dated. May '7, 1889.

Application filed August 23, 1888- To all whom, it may concern.-

Be it known that I, EUGENE K. BECKWITH,

a citizen of the United States of America, re-

siding at Nian tie, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Combination-Tools; and I do hereby 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 letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to a combination-tool; and it consists in anovel construction and arrangement thereof, as will be more fully hereinafter described and claimed.

I have illustrated my improved device in the accompanying drawings, like letters of reference being used to designate similar parts in the several views; and therein- Figure 1 is a side elevation of a saw-blade with the handle thereof shown in section. Fig. 2 is a like view of the front end of the saw-blade shown in Fig. 1 with a handle in section adjusted over the point thereof. Fig. 3 is a front elevation of the saw-blade. Fig. 4.

. shows modifications in the formation of the boring-point of the blade. Fig. 5 illustrates a novel arrangement of the saw-teeth.

A indicates the saw-blade, and B the stationary handle thereof, as fully shown in Fig. 1. The rear of the saw-blade is formed with a series of apertures, a, through which rivets or rods a are passed and extend through each side of the handle. By means of these rods a and the series of apertures ain the saw-blade A the said saw-blade is made adjustable with the handle B, and can thereby be projected farther outward therefrom, if so desired and found necessary.

The saw-blade A gradually tapers from the handle downward to form a point, ta which is flattened or sharpened into a boring-point. The saw-blade has cross=sectionally the form of an isosceles triangle, and is so constructed by grinding off the sides thereof to form a cutting-edge, b. Both sides of the saw-blade 5o gradually taper inward toward each other Serial No. 283,541. (No model.)

from the teeth I) upward to the said cuttingedge. By this means the teeth I) are made broader and employ more metal in their construction than the remaining part of the blade. By practical usage I have found this enlarged form of teeth to be more advantageous and useful in general work than teeth of smaller dimensions.

In the use of the ordinary key-hole saw it is. frequently necessary to start an opening therefor by means of an auger, and to avoid this operation I form a boring-point at the front end of the saw-blade for starting the saw. The saw is guided, when first starting to cut, by the cutting-edge formed at the upper part of back thereof, which will; sink upward into the wood and thereby render the movement of the blade more easy.

As shown in Fig. 4., the point of the blade may be bent into different forms to more readily form an auger-point; and as a further aid to boring with said point the saw-teeth at the point are arranged at an angle and gradually run from angular position at the front rearward to a position substantially at right angles with the saw-blade, as shown in Fig. 5. This arrangement of the teeth virtually forms a screw at the point. of the blade similar to an anger or gimlet.

After the sawing has been finished it often becomes necessary to ream out or smooth the hole or aperture that has been sawed. By the formation of the back of my improved 1 saw into a cutting-edge it is readily convertible into a spokeshave; and to make this more readily practicable and attainable I supply an additional handle, C, which is fitted over the sharp point, as shown in Fig. 2. This handle C is readily removed from or placed upon the point of the blade, and the saw is thereby quickly converted from one form of tool to the other. Various sizes of handles 0 will be used as found necessary. I

The utility of my improvement will be readily appreciable, and in its construction I do not propose to confine myself to the exact construction set forth.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. As an improved article of manufacture, a combination-tool which consists of a blade which is tapered longitudinally, said blade being alsotapered in cross-section to provide a thick portion on one edge in which sawteeth are formed or cut, and opposite thereto acutting-edge, one end of the blade forming a boring-point, a handle permanently attached to the large end of the blade, and a removable handle having a socket in which the pointed end of the blade can be placed, substantially as shown, whereby the implement can be used either as a co1npass-saw,boring tool, drawing-knife, or saw with handle at eachend.

2. A key-hole saw-blade having the cuttingedges of the teeth at the point arranged diagonally with relation to the sides of the blade, the angle of the cutting-edges of the teeth decreasing gradually toward the rear end of the blade, where the cutting-edges of the teeth are at right angles with said sides, substantially as described.

3. A key-hole saw-blade having a boringpoint at its outer end and the cutting-edges of the teeth arranged at progressively-dd creasing angles to the sides of the blade from front to rear, substantially as described.

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

EUGENE K. BEGKWITI-T.

Witnesses: Y

A. I. BUSH, E. L. BEoKwITH.