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Publication numberUS1258481 A
Publication typeGrant
Publication dateMar 5, 1918
Filing dateAug 1, 1917
Priority dateAug 1, 1917
Publication numberUS 1258481 A, US 1258481A, US-A-1258481, US1258481 A, US1258481A
InventorsArthur B Shobar
Original AssigneeArthur B Shobar
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1258481 A
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Description  (OCR text may contain errors)



1 ,258,4;81 I Patented Mar. 5, 1918.



Specification 01 Letters mm.

Application-filed August 1, 1917. Serial No. 183,916.

To all whom, it may concern:

Be it known that I, ARTHUR B. Srronan, a citizen of the United States, residin at llamoille, in the county of Elko and tate of Nevada, have invented new and useful improvements in Chisel-Protectors, of which the following is a specification.

This invention relates to special receptacles, and more especially to those for containing edge tools; and the object of the same is to produce a protector for the cutting edges of highly tempered chisels.

lit is well known that the careful workman protects his chisels when he puts them in the tool box, so that their cutting edges will not become dulled and nicked by contact with the other tools or with any object therein. This proection is usually afi'orded by wrapping the outer endof the chisel in cloth or the like, and some workmen slip over their chisels protectors in the shape of receptacles of various materials and sizes. lhe receptacle itself must be so bulky or of such strength that it will stand accidental blows, and if means are not provided it will slip off the chisel in the tool box so that its usefulness comes to an end just at the time when it is necessary. It is hardly worth while to give special shape to the blade of the chisel or other tool orprovide the structure with special engaging devices for holding it in place, and yet it is desirable that some means be present to prevent its loss.

With these conditions in View l have devised an improved protector which is of metal so that it has the necessary strength, is preferably of aluminum so that it has ver little weight and cannot rust, and yet which has peculiar formation whereby it is automatically held on the chisel and yet is not actfually in contact with the cutting edge thereo' Details are set forth in the following speciiication and reference is made to the drawings whereinto designate the blade of the chisel and 0 its cutting end which as usual is beveled from the upper to the lower side of the blade and has a very fine cutting edge E at its extrem1ty. My protector is preferably made of alummum in box shape as shown, closed along its two sides land 2 and its lower end 3, and having its upper end or mouth open as seen at 4 in Fig. 2, and it may well be made of two pieces of aluminum connected along the two sides and lower end in any suitable manner, or of one piece of double size bent upon itself in place of one such connection. make the lower side 5 flat because 1t underlies the flat lower face of the chisel blade, and the upper side 6 I make" originally flat and then give it a slight depression at its transverse center as best seen in Fig. 2-- this depression running out at the lower end where the upper side is connected with the lower side. Thereby is produced an inwardly sprung rib at the transverse center of the upper side of the mouth, which bears on the upper face of the blade with sufficient force to hold the entire protector in place.

The side edges 1 and 2 preferabl converge upward as best seen in Fi 2, an when the depressed top 6 is straig tened out by inserting the chisel these sides swing outward a trifle as will be clear. Even if the blade B is both thicker and narrower relatively than as shown in Fig. 1, it may be inserted in this protector because the top will arch upward to permit; and the convergence of,

the edges 1 and 2 permits the insertion of a very thin blade, such as that of a putty knife which might be quite fully as wide as the lower side 5 and would extend out into an acute angle between this side and the edges-then it will be held in placevas above described. The front end of the top 6 is preferably beveled down to the front end of the bottom 5 at an acute angle sharper than that made by the bevel of the chisel at its extreme edge, so that the beveled face on the top will extend beyond opposite sides of the beveled face on the chisel and prevent the cuttin edge of the chisel from contactillg with t e closed end of the protector.

In using the device, before the workman puts away his chisel he slides one of these protectors over its sharpened end, and the rib bears against it to hold it thereon so that it is safe to put the tool into a box with other metal tools. I can make the device any sizes,

Patented Mar. 5, 1918.

In any case I refer to and the workman should have one for each chisel. Even when Well made, these protectors can be readily sold at a very low cost, and as they are practically indestructiw ble they will not need replacing.

What is claimed as new, is

1. The herein described sheet metal tool protector substantially of box shape comprising a flat bottom, edge members rising integrally from the edges of said bottom and converging upward, a top connecting the inner edges of said edge members and having a depression at its transverse center, the lower end of the top being inclined down- Ward and connected with the loWer end oi the bottom at an angle sharper than that formed by the cutting edge of the ordinary chisel, and the upper end of the protector being open, for the purpose set forth. V

2. A protector for the cutting edge of cutting implements comprising a caslng open at one end and having an inclined top of eoncavo-convex shape in cross section, a wall at the opposite end of said casing inclining upwardly and outwardly from the bottom to the top of said casing at a sharper angle. and for a greater distance than the length of the beveled face adjacent the cutting edge on a cutting implement inserted in said casing, whereby the cutting edge on the cutting implement is prevented from contacting with the closed end of the casing.

lin testimony whereof I afix my signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3685064 *Jul 13, 1970Aug 22, 1972Cuscovitch John F SrCarpet tool
US6487777 *Nov 16, 2000Dec 3, 2002Kawasaki Jukogyo Kabushiki KaishaCutting blade cover
US6491284Jun 14, 2000Dec 10, 2002Richard A. JollyCarpet stretching device
US7152326 *Feb 19, 2004Dec 26, 2006Norman TylerRotary blade holding tool
U.S. Classification30/167, 30/286
International ClassificationB27G17/08
Cooperative ClassificationB25D3/00