US1409638A - Chisel handle - Google Patents

Description

A. L. ZETTERMAN.

CHISEL HANDLE.

APPLICATION EILED APR. 20. 1921.

} 1,409,638., Patented Mar. 14, 1922.

Iriven for O -(A 5 Al UNITED STATES PATENT OFFICE.

AXEL LEONARD ZETTERMAN, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR OF ONE HALF T EDWARD NELSON, OF NEW BRITAIN, CONNECTICUT.

CHISEL HANDLE.

To all whom it may concern:

Be it known that I, AXEL LEONARD Zn'r'rnn- 3am, a citizen of Sweden, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Chisel Handles, of which the following is a specification.

My invention relates to improvements in chisel handles, having reference to the handles of wood that are applied to carpenters chisels, and the object of my improve ment is to improve the butt end that receives the blows of the hammer or mallet by means of the application to the said butt end or butt of a cap of special form to the end of the handle body, and involving a special shaping of the said end for cooperating therewith, whereby there will be provided a special cushioning device having special advantages in use and also providing a protection for the said end of the handle body.

In the accompanying drawing 2-.-

Figure 1 is a side elevationof a carpenterschisel that is provided with a handle that embodies my improved cap at the butt end,

Figure 2 is a side elevation on an enlarged scale of the butt end portion of the structure that is shown in Fig. 1. V

Figure 3 is a plan view of the same, being in part broken away.

Figure 4 is a sectional view on the line 1-4: of Fig. 3.

Figure 5 is a side elevation of the butt end of the handle body with the cap removed.

Figure 6 is a bottom view of the cap.

My improved chisel handle comprises a handle body 10 of wood that is applied to the blade structure 11 of a carpenters chisel in. the usual manner and that has applied to the butt end portion 12 a cap structure 13 of special form and material constructed and arranged to receive the blows from the hammer or mallet in use and to serve to cushion the effect of the said blows and also serve as a protection for the said end portion 12 so as to enhance the life thereof.

To this end the cooperating parts of the said handle end portion 12 and cap structure 13 are of special character, as will be described.

Considering the feature of the end portion 12 of the handle body 10, the upper end fae Specification of Letters Patent. Pg tented 11 1 1 4 19.22

Application filed April 20, 1921.

Serial No. 462,798.

thereof has the outer and major portion faced off flat and radial so as to provide an annular platform 14 and extending up- 'ardly from the said platform 1% and along the axis is an integral tenon 15 of appreciable length.

In use it is the said platform 14, of annular form as mentioned and exterior to the tenon 15, that receives the effect of the blows through the medium of the cap structure 13 that is seated thereon.

The said cap structure 13 has for the exterior a cylindrical side wall 16 and the top end face 17 may be flat as shown or more or less rounded, any desired shape being provided for the exterior form or content.

The bottom face 18 is in the form of an annular seat or base that is a fit for and adapted to cooperate with the opposed plat form 14 on the handle end portion 12.

Extending upwardly from the base 18 is a recess or socket 19 having a cylindrical form that is a fit for the tenon 15 along the pcripheral portion of the said tenon 15.

As to the length or depth of the socket- 19 relatively to the length of the tenon 15 it will be noted that with the base 18 seated on the platform 14 there is provided a positively open space 20 between the tip end face 21 of the tenon 15 and the opposed end wall 22 of the socket 19.

Thus the open space 20 serves to provide clearance between the top end wall portion 28 of the cap 13 and the opposed end face of the tenon 15.

The effect of the construction and arrangement described is to protectthe tenon from the effect of blows that are directed upon the top end face 17 and to insure that the effect of such blows will be received by and sustained by the platform 14.

Because of the operative conditions described it is desirable to make the platform 11- relatively large and make the cross-section of the tenon 15 small or appreciably reduced. As the tenon serves to hold the cap in place, this should have appreciable length. That is to say, the tenon should be long and slender.

In order to provide for such a construction of the tenon 15 and at the same time insure strength and serviceability to the part I may provide some form of reinforcement therefor such as the metal rod 24 shown, which extends downwardly through the tenon and for an appreciable distance into the handle body 10.

It is important now to note the material of which the cap 13 is made.

lVhile certain materials known as compo sltion or hard rubber may be used, these are e not entirely satisfactory.

due to the resiliency of the material of which it is made, which materiah'as mentioned, is celluloid.

The cap, made of celluloid as described, will last indefinitely, being practically indestructible under the usual conditions of use. Also, the material mentioned 18 readlly obtainable and is adapted to be fashioned by ordinary methods to the particular form required. V

The tenon 15, as mentioned, is integral with the handle body 10, the material for these parts being wood. The provision of the clearance space :20, therefore, permits of leaving the end face 21 of the tenon 15 in relatively rough and unfinished condition and precisionas to the length of said tenon 15 is avoided, which is an advantage 1n the detail of manufacture of the handles.

' The tenon 15 being of appreciable length serves to sustain the effect of side blows on the butt of the handle, and, being integral with the body 10, relieves said body of the effect of such side blows. a

The clearance space 20 is preferably relatively shallow or thin. This permits of extending the tenon well up into the interior of the, cap 13 and extending the length of the opposed and coacting surfaces for the cylindrical wall of the'tenon and the border wall of the socket 19, which surfaces serve as the means-for retaining the cap in place.

I claim as my invention A handle having a celluloid blow receiving cap united therewith by a tenon-inclosed socket joint arranged so that the blow may be transmitted to the annular surface surroundingthe joint.

AXEL LEONARD ZETTERMAN.

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