US978387A - Chisel-protector. - Google Patents

Description

0. U. MATTHEY. CHISEL PROTECTOR. APPLICATION FILED 1116.13, 1910.

978,387. Patented Dec. 13, 1910.

nesses fi z/mm? Attorneys CHARLES U. MATTHEY, OF BROMLEY, KENTUCKY.

CHISEL-PROTECTOR.

Specification of Letters Patent.

Patented Dec. 13, 1910.

Application filed August 13, 1910. Serial N 0. 577,024.

To all whom it may concern:

Be it known that I, CHARLES U. MATTHEY, a citizen of the United States, residing at Bromley, in the county of Kenton and State of Kentucky, have invented a new and useful Chisel-Protector, of which the following is a specification.

It is the object of the present invention to provide a novel device for protecting the cutting edges of chisels.

It is well known to carpenters that a chisel carried loose in a tool chest will have its cutting edge soon nicked and otherwise dulled.

The present invention therefore aims to provide a simple device which may be slipped upon a chisel blade and will protect the cutting edge of the said blade.

A further aim of the invention is to provide a device for this purpose and of this character so constructed that it may he slipped upon the chisel blade whether the chisel blade be new and comparatively thin at its cutting end or be an old blade which has been repeatedly ground down and is consequently coniparatlvely thick.

With the above and other objects in view, the invention consists in the general construction and arran ement of parts shown in the accompanying drawings, in which,

Figure 1 is a perspective view of the de vice embodying the present invention applied upon a chisel blade. Fig. 2 is a vertical longitudinal sectional view therethrough. Fig. 3 is a vertical transverse sectional view on the line 33 of Fig. 2.

In the drawings the device is illustrated as in the nature of a sheet metal casing of the same general form or shape as the cutting end of a chisel blade but larger than the same. This casing includes a top wall which is indicated by the numeral 5, a bottom wall indicated by the numeral 6, and side walls indicated by the numeral 7, the top wall 5 at the front being bent downwardly and thence forwardly so that the forward portion of the casing is of less thickness than the rear portion or mouth thereof. It will be observed that the forward end of the casing is closed by an insert indicated by the'numeral 8 and is preferably of wood although some other soft material may be equally as well employed when desired. This insert is held in place by means of rivets 9 which are secured therethrough and through the top and bottom walls 5 and 6 of the casing. At its rear, the casing is 0 en so as to afford a mouth and the chisel bla e to be protected is to be inserted into the casing by way of this mouth as will be readily understood.

It is stated above that the casing is of greater dimensions than the chisel blade upon which it is to be fitted and which it is to protect and this is particularly true as regards the depth of the casing at and adjacent its mouth and the reason for so proportioning the casing will presently be fully explained.

A sheet metal leaf 10 is secured at its forward end between the under face of the insert 8 and the upper face of the bottom wall 6 of the casing and this leaf is of'substantially the same width as the interior of the casing and at its rear end terminates at the mouth of the casing and has its rear end edge overturned as at 11 so that when a chisel blade is inserted into the mouth of the casing, its cutting edge will not be dulled by contact with an abrupt edge.

It will be observed from an inspection of Fig. 2 of the drawings that a chisel blade to be protected by the device is to be inserted into the casing between the front wall 5 thereof and the leaf 10 and in order that the leaf 10 may be held firmly frictionally against the under side of a blade so inserted, one or more leaf springs 12 is secured at its forward end to the underside of the leaf 10 and is bent to bear against the said leaf near its point of attachment thereto and at its free end to bear firmly against the upper face of the bottom wall 6 of the casing. Thus, the combined resiliency of the leaf 10 and the springs 12 result in the leaf being held firmly frictionally against the under side of a chisel blade inserted in the casing as shown in Fig. 2 of the drawings. When so inserted, the cutting edge of the chisel blade will contact with the insert 8 and this insert being of wood or other soft material, as before stated, will permit of rough handling or throwing about of the chisel and protector without danger of the cutting edge of the chisel being nicked or otherwise dulled. It will furthermore be understood from the foregoing description and from an inspection of the drawings that a chisel blade thicker than the one illustrated in Fig. 2 or thinner than the said one may be inserted into the casing and be equally as Well protected. Also it Will-be understood that the frictional engagement of the leaf 10 against the side of the chisel blade serves to hold the device upon the blade Without the employment of any positive securing means and this is a decided advantage inasmuch as the device may be quickly slipped upon a chisel blade and as quickly removed therefrom although not liable to become accidentally removed. stood, further, that Whereas but two of the springs 12 are here shown, but one spring may be employed or three or more springs and that the dimensions and general conformation of the several elements of the de- It Will also be under vice may be varied Without departing from the spirit of the invention.

\Vhat is claimed is In a device of the class described, a casing having an insert in one end, and a friction leaf Within the casing and extending from the insert to the mouth of the casing.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of two Witnesses.

CHARLES U. MATTHEY,

\Vitnesses ANTHONY HAUcK, BLANCHE E. MCCOY.

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