US2075553A - Knife - Google Patents

Description

March 30, 1937. A. STORFER 2,075,553

` KNIFE File-d March le, 193e INVENTOR Patented Mar. 30, 1937 UNITED STATES IPATENT 'ol-FICE Application March 16,

1 Claim.

This invention relates to improvements in knives and has for its main object to provide a knife for cutting furs, skins or the like, whose construction will be simple and of relatively small 5 cost, and wherein just a section of a safety razor blade of the usual Gillette type can be utilized as a cutting edge.

Another object is to so construct the holder as to permit the mounting and replacement of the blade easily and quickly and which will effectively hold the blade in operative position against wabbling.

The hitherto known fur knives require use of specially shaped razor blades and their construction is unsatisfactory in that they are comparatively costly and that the blades cannot be firmly locked in position.

With these and other objects in view, my invention consists in the novel construction combination and arrangement of parts as will be hereinafter more fully described and defined in the appended claim.

In the accompanying drawing which constitutes part of this specification and in which similar reference characters denote corresponding parts:

Fig. l is a side elevation of my improved knife showing the blade locked in the holder.

Fig. 2 is a similar view showingv the blade un. locked in the holder, and

Fig. 3 is section on line 3-3 of Fig. 1.

As cutting edge for my knife I utilize a half section of a razor blade R. of the Gillette or similar type, formed by splitting the latter diametrically. I found that such half razor blade can be conveniently mounted and locked in operative position in a holder which constitutes my invention.

The holder comprises a at mounting member or plate I of sheet metal of which the front or head portion II is tapered and formed with a cut out portion Ilc and the rear portion I2 serves as a handle or grip.

The inclined front edge I Ia of the head portion 45 is longitudinally bent upon itself to form a bead or flange I Ib which extends from the bottom edge to a point short of the peak or top end of the incline IIa. This bead is bent in such a manner as to form between itself and the inner face of the plate a laterally flaring or wedge shaped groove Ilf (Fig. 3) which at the juncture of said bead and body portion of the plate is but slightly wider than the thickness of said razor blade R.

At a point spaced from the said bead the head portion II of said plate I0 is formed, by punch- 1936, Serial No. 69,042

ing or otherwise, with a short stud or projection IIe to engage the usual hole R' of said razor blade whereby the latter can be centered on the plate so that its biased edge will extend through the groove IIf parallel to the front biased edge 5 IIa of the head portion II, while its cutting edge R2 will project beyond the lower edge of the cut away portion IIc and its rear edge be in alinement with the shoulder Ild formed at the rear end of the cut away portion II. 1o

At a suitable point, as at I3a, there is pivotally secured to said mounting plate I0 a flat locking member I3 of resilient sheet metal, whose front or head portion I3b is also tapered, the inclined edge I3c thereof conforming with the edge IIa of the plate Ill and whose rear end i3d serves as a handle. 'Ihis inclined edge I3C is adapted when the locking member is turned on its pivot I3a in clockwise direction (Fig. 2) to enter the groove IIf and on exertion of suflicient pressure to wedge the razor blade R. between itself and the plate IIJ so as to firmly lock said blade in operative position.

In order to prevent said locking plate I3 from accidentally leaving the groove Ilf, the stud IIe 5 may be made a little higher than the thickness of the razor blade and the head portion of said locking member I3 may be provided on its inner face with a circular depression I3e to snap over and engage the stud IIe when the biased edge I3c of said member on passing into the groove I If is substantially parallel with the edge IIa of plate I0.

The handle or rear portion i3d of said locking member I3, for the purposes of economy in material, may be considerably shorter than that of the base plate I0 and is so shaped that its lower edge I3lz will be in alinement with or follow the contour of the lower edge I2a of the handle portion I2 of said mounting plate ID. Said handle I3d may be provided with a circular cut out I3f for the insertion of the ringer' tip whereby it may be conveniently turned into unlocking position.

The lower edge of the head portion I3b of said locking member I3 is also cut away as I3h to be in complete alinement with that of the mounting plate I0, so that after the blade has been wedged in operative position its cutting edge R2 will be fully exposed.

From the foregoing it will be seen that a half section of a razor blade of the Gillette type can be conveniently utilized as cutting edge for my knife and that the same can easily and quickly be secured in my improved holder. It will also be seen that by reason of the simplicity of construction its cost of production is reduced to a minimum.

Since various changes may be made in the construction of my device without departing from the principle of my invention, I do not wish to restrict myself to the details described and shown.

What I claim is:

In a knife for cutting fur or the like, the com- 10 bination with a section of a. razor blade of the Gillette type formed with a biased edge, of a holder for said blade section comprising a. mounting plate whose front edge is biased to conform with a biased edge of the razor blade section,

ALFRED STORFER.

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