US2639505A

US2639505A - Knife for carving leather and the like

Info

Publication number: US2639505A
Application number: US274693A
Authority: US
Inventors: Ralph E Reynolds
Original assignee: Individual
Current assignee: Individual
Priority date: 1952-03-04
Filing date: 1952-03-04
Publication date: 1953-05-26
Anticipated expiration: 1970-05-26

Description

y 6, 1953 R. E. REYNOLDS 2,639,505

KNIFE FOR CARVING LEATHER AND T HE LIKE Filed March 4, 1952 F76. 2. F/G. 3.

INVENTOR.

EAL PH E es Y/v040s,

Patented May 26, 1953 UNITED STATES PATENT OFFICE KNIFE FOR CARVING LEATHER AND THE LIKE This invention relates to cutting devices, and more particularly, has reference to a knife having a swiveled blade and adapted particularly for carving leather and similar materials.

In cutting a material such as leather, the worker is often required to cut ornamental patterns and the like in the material, and heretofore, difficulty has been experienced in cutting the material with a desired amount of facility. This is due to the fact that generally, the blade of the knife is fixedly associated with the handle, and accordingly it is necessary that the worker manipulate the handle almost continuously, for the purpose of disposing the cutting edge of the knife along the line where the material is being out.

In view of the above, it is one important object of the present invention to provide a knife of the swiveled blade type, that is adapted particularly for cutting leather, the blade being swiveled or castered upon the handle associated therewith, in such a manner as to follow faithfully the line along which the handle is being moved during the cutting of a piece of material.

Another important object is to provide, in a blade as stated, a simple arrangement whereby the blade may be swivelly mounted, the mounting of the blade being such as to cause the shank of said blade to hold the component sections of the handle against relative movement.

Yet another important object is to provide, in a swiveled blade construction for a knife, complementary means on the shank of the blade and the handle sections that will prevent accidental withdrawal of the blade from the sections with which it is assembled.

A still further important object is to provide, in a knife for carving leather and like materials, a castered blade the cutting edge of which is so curved and inclined as to cause said edge to enter the material with a minimum amount of difficulty, thereby to facilitate movement of the knife over the material during the cutting operation.

Other objects will appear from the following description, the claims appended thereto, and from the annexed drawing, in which like reference characters designate like parts throughout the several views, and wherein:

Figure 1 is a side elevational view of a knife formed in accordance with the present invention;

Figure 2 is an elevational View of the knife as it appears when viewed from the left of Figure 1; Figure 3 is a longitudinal sectional view; and

Figure 4 is an exploded perspective view.

Referring in detail to the drawings, the reference numeral H] has been applied generally to a knife handle, said handle including complementary handle sections I2, M respectively.

The handle sections are relatively elongated, and are formed with flat, contacting, inner surfaces l6, l8, and transversely curved outer surfaces which, when the handle sections are connected, impart to the handle a circular crosssectional shape. At their opposite ends, the handle sections are rounded off as at 20, 22, in the preferred embodiment of the invention.

Formed in the handle section If is a transverse opening 24, said opening being disposed medially between the opposite ends of said section. At one end, the opening 24 opens upon the flat inner surface I6 of the handle section, said opening communicating at its other end with a counterbore 26 formed in the rounded outer surface of the handle section.

The other handle section 14 is formed with a transverse opening 28, said opening communicating at its inner end with the flat inner surface 18 and at its outer end with a. nut-receiving recess 30 polygonally shaped for the purpose of holding against rotation a nut seated therein.

When the handle sections are engaged against one another, the

openings

24, 28 are brought into registration, for extension therethrough of a connecting bolt 32. The connecting bolt 32 has a threaded shank adapted for engagement with a nut 34, that is seated in the recess 3d of the handlesection l4.

At one end of the handle section I2, I form in the flat inner surface I6 thereof a longitudinal groove 36, said groove being extended longitudinally and centrally of the inner surface It and opening at one end upon the lower end of the handle section in which it is formed. The section It is provided with a longitudinal groove 38, said groove facing the groove 36 when the handle sections are connected. Since the

grooves

36, 38 are respectively formed to a semicircular crosssectional shape, they cooperate to form a longitudinal bore in one end of the handle, that extends longitudinally and centrally of the handle, and is formed to a'circular crosssection.

In the handle section I2, at the inner end of the groove 36, I provide hemispherical recess 40, said recess communicating with the groove 36 (Figure 4) and being adapted to face a hemispherical recess 42 formed in the section 14 and communicating with the groove 38 of said section M. The

recesses

40, 42 coact to provide a spherical cavity within the handle, at the inner end of the longitudinal bore thereof.

A knife blade has been designated generally by the reference numeral 44, and is of integral construction. Said blade includes an elongated shank 45, that extends through the longitudinal bore of the handle, said shank having one end projecting beyond the lower end of the handle. The pro jecting end'of th'exshanklis integrallyformedwith a lateral extension 48, said extension being of fiat, curved formation and having a sharpened cutting edge 50.

throughout its length, and is arranged obliquely to the axis of the swiveled shank 4B. As a result, when the handle is drawn over a; piece of material to be out, not shown,,the. cutting edge 50 will penetrate the material'ina shearing action that will facilitate the cutting operation.v Addi? tionally, the lateral extension 48 on which the cutting edge is-formed will trail the. handle it, and: will followv along. the. line alongwhich the material is beingcut.

On. the inner endiof theshank. 46., 1 form a sphericalenlargementor ball-52, said-ball being proportioned to-flt-withinthe cavity. 49, thus to preventwithdrawalnoithe shank from thehandle when. said. handle has. its componentsections joined by'the connecting.b01t-.3 2..

It is also believed. of importance to. note that the blade M,.whilebeingheldby,thehandle sections againstwvithdrawal, will. at thesame time hold the handlesectionsagainst relative. pivotal movement about. the axi'gof. the single connect? ing boltjfi In.thisway,,Iamableto provide a handlehaving. a single connecting, means 32, a bladebeingrotatably mounted in thehandle and beingadaptedfat the sametime toholdthe. handle sections against relativemovement.

It is believed apparent that the invention is not. necessarily confined. to the specific use or usesthereoi describedabove, since it may be. utilizedifor, any; purpose towhich it may be suited. Nor isthe inventionto be necessarily limited'to thelspecific construction illustrated and described, since. such. construction. islonly intended to be illustrative. of .the principles. of .operationand the means presently devised'to. carry, out said principles, it being considered that the. invention comprehendsany minor changesin construction that may) be permitted. within the scope. of 'the appended claims;

Whatis claimed is.

1. A. knife of the swivel bladetype for carving leather and like materialscomprisingai handle including a pair of'complementary handle sec- As may be particularly noted from Figure 1, the cutting edge-58 is curved tions having fiat contacting inner surfaces formed with grooves extending longitudinally of the sections and facing one another to form a longitudinal bore in the handle, removable securing means extending through said handle sections intermediate the ends thereof and connecting the handle sections together, said inner faces having recesses communicating with the respective grooves andi facing one another-"to form' acavlty in the handle, and a blade swivellymounted on the handle, said blade including a shank extending through and rotatable in said bore and having one-endlprojecting beyond one end of the handle sections, a lateral extension formed upon said projecting end of the shank and provided with a cutting'edge; and means on the shank conformably, fittingv and rotatable in said cavity to provide means effective to hold the shank against with-- drawal fi'om the bore.

2. A knife of the swiveled blade type for carving leather and. like materials, comprising: a handle including a-pair of complementary, handle sectionseachofwhich.- is formed with a single openingintermediate its ends; a-bolt-extending through said openings and connecting the handle sections together, said sections having fiat, con.- tacting', inner surfaces formed with groovesextending longitudinally of. the sections and'facing one-another to provide. alongitudinal bore in-the handle, saidlinner: surfaces having'hemispherical recesses communicating-t with the" grooves and facing. one-another-toiorm a a spherical cavityin the handle; anda blade 'swivelly; mounted on the handle; saidblade including a shank' extending throughlandv rota-table in-said'bore, one end-of the shank projecting-.beyondione end :of the-sections; a lateral: extension formedz upon said projeoting end of: the: shank and: provided with a cuttingedgaand a-ball formedonthe shank and rotatable" in saidcavity" to provide means effective tohold theshank against withdrawal from the bore; said shank holdingthe' sections against relative pivotalamovement: about theaxis'o'f said bolt.

RALPH: REYNOLDS.

References Cited in the-file-of this patent UNITED STATES PATENTS- Number Name Date 1 207,866" Hartford .Sept. 10,1878 1,775,813' Colby .Se;ot. 16, 1930 2,425,665 Arden l2, 1947 2,450,346 Krilow Sept. 28, 1948 2,450,347 Kril'ow Sept. 28', 1948