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Publication numberUS486426 A
Publication typeGrant
Publication dateNov 22, 1892
Publication numberUS 486426 A, US 486426A, US-A-486426, US486426 A, US486426A
InventorsChapxn C. Brooks
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 486426 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No, Model.)

0. 0. BROOKS.


- No. 486,426. Patented Nov. 22, 1892.

I ad, By M -y Lmw.v wnsmrmron n u UNITED STATES PATENT OFFICE.



SPECIFICATION forming part of Letters Patent No. 486,426, dated November 22, 1892.

Application filed March 7, 1892.

.To all whom it may concern:

Be it known that I, OHAPIN G. BROOKS, a citizen of the United States, residing at Cape I Elizabeth, in the county of Cumberland and State of Maine, have invented certain new and usefullmprovements in Knives; andldohereby declare that the following is a full, clear, and exact description of'the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation toimprovements in cutters-such, for instance, as hay and other knives and other edged tools employing a serrated beveled cutting-edge.

The objects of the invention are to provide a strong durable cutter, so constructed as to be produced with greater facility and less cost than heretofore.

Referring to the drawings, Figure 1 is a side elevation of a hay-knife embodying my invention. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a transverse vertical section showing a modification of the corrugations of the back. Fig. 4 is a side elevation of the opposite side of the knife shown in Fig. 1. Fig. 5 is a bottom plan of the knife. Fig. 6 is a side elevation of the knife-blank before it is beveled.

My invention, as herein described and illustrated, is embodied in the hay-knife; but it is obvious that the same method of construction may be applied to various cutters and edged tools designed to be moved to and fro in use and employing a serrated cutting-edge.

In constructing the knife a sheet of steel is subjected to the action of suitable dies, wherebythesameis provided withaseriesofthroughand-through corrugations 1 1, the depression or concavity upon one side causing a corresponding convexity on the other side. I prefer that the corrugations should be angular, as shown in Fig. 5; but they maybe made fluted or grooved. These corrugations may $erial No. 423,960. (No model.)

pends, of course, upon the thickness of the steel used and the purpose to which the knife is to be applied. The blank thus constructed is now ground upon one side, whereby a bevel is produced, the metal of the blade being ground away sufficiently to form the teeth or serrations 4. (See Figs. 1 and 2.) These teeth are formed, as is obvious, in consequence of the convex portion upon the beveled side being first Worn away by the grinding process, the concave portion forming the teeth and the convex portion the spaces between them. The sharpening of the blade when dull may be readily accomplished by grinding in the same manner as when forming the teeth. A knifewith double cutting-edgesmaybeformed by locating the corrugations 2 2 at or near the center of the lengthand forming corrugations 1 1 on either side.

What I claim is- A blade having a series of corrugations extending through and through the blade and to about its transverse center and one of its edges beveled to form serrations or teeth and having its back provided with one or more longitudinal stiffening-corrugations, substantially as specified.

In testimony that I claim the foregoing as my invention I have hereunto set my hand this 2d day of March, A. D. 1892.


In presence of GEO. E. BIRD, A. O. BERRY.

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US4358893 *Apr 20, 1981Nov 16, 1982B & J Manufacturing CompanyTire trimmer
US5002555 *Feb 10, 1989Mar 26, 1991Petersen Thomas DGall-resistant ribbed surgical saw blade
US5133728 *May 7, 1991Jul 28, 1992Petersen Thomas DGall-resistant ribbed surgical saw blade
US5135533 *Jan 5, 1990Aug 4, 1992Petersen Thomas DCoated gall-resistant surgical saw blades
US5507763 *Oct 12, 1994Apr 16, 1996Hall SurgicalSurgical saw blade
US9475141 *Aug 3, 2012Oct 25, 2016Milwaukee Electric Tool CorporationReciprocating saw blade
US20100125289 *Nov 18, 2008May 20, 2010Aditya Dispomed Products Private Ltd.Scalpel blade having dual indentations on back edge
US20130031791 *Aug 3, 2012Feb 7, 2013Butzen Robert WReciprocating saw blade
USD729600May 6, 2014May 19, 2015Milwaukee Electric Tool CorporationSaw blade
USD766672 *Nov 25, 2015Sep 20, 2016E. Mishan & Sons, Inc.Large knife
USD766673 *Nov 25, 2015Sep 20, 2016E. Mishan & Sons, Inc.Long narrow knife
USD766674 *Nov 25, 2015Sep 20, 2016E. Mishan & Sons, Inc.Bread knife
USD773904 *Sep 29, 2015Dec 13, 2016Danny KennedySerrated knife
USD781666 *Nov 25, 2015Mar 21, 2017E. Mishan & Sons, Inc.Small knife
Cooperative ClassificationB26B9/00