US2464206A - Multiple knife - Google Patents

Description

M. E. BECKER MULTIPLE KNIFE March 15, 1949.

Filed May 16. 1944 Hime/vn March 15, 1949. M E, BECKER 2,464,206

MULTIPLE KNIFE Filed May 16. 1944 l 3 Sheets-Sheet 2 IN VEN TOR.

.l/awo Becker March 15, 1949. M. E, BECKER 2,464,206

MULTIPLE KNIFE Filed May 16. 1944 3 Sheets-Sheet 5 y l JNVENTOR.

fa/70 f. Becker 9770/?/VEY Patented Mar. 15, 1949 UNITED STATES PATENT OFFICE Claims.

The present invention relates to multiple bladed knives, and more particularly to a knife especially suitable for making simultaneously a plurality of cuts in materials wherein the coating or the like on one side of the material must notv be damaged while making the cuts.

The invention is described in connection with a knife adapted for use in the fur trades where -skins are prepared for use in coats and other garments, and for other purposes, by cutting the, same into a considerable number of narrow strips. 'I'hese strips are afterwards re-arranged and sewn together to obtain particular patterns and effects.

Different furs are treated differently in that the width of the cut strips will vary as between a mink or sable on the one hand (in which the -strips are narrow) and foxes on the other hand (in which the strips are normally several times wider).

Narrow strips are of the order of one-fourth an inch and the wider strips are of the order o a multiple bladed knife in which the blades are,`

readily assembled upon and removed from a holder, and yet the blades are firmly held in spaced relation with freedom from chattering or lateral vibrations which would disturb the regularity of the cuts or slits.

It is another object of this invention to provide a novel construction of holder of a convenient size and shape to conform to the hand when the holder is held between the thumband second nger with the fore-finger resting on top of the. holder, and yet capable of holding a plurality of blades with spacers therebetween which are locked together and firmly held so as to maintain the proper relationship of the spaced blades while simultaneously making the cuts or slits.

It is a further object of this invention to provide an improved mounting for the cutting blades of a multiple-bladed knife.

It is a still further object of this invention to provide improved forms of cutting knives,`

Therefore, these cuts are made from then Other and further objects oi this invention will be apparent from this specification, taken in conjunction with the accompanying drawings, in

. Which- Figure 1 is a perspective view of one embodiment of the improved fur cutting knife herein disclosed, showing the use of two cutting blades;

Fig. 2 is a sectional view on the line 2 2 of Fig. l, considerably enlarged to bring out details of construction;

Fig. 3 is a perspective view of another embodiment of this invention showing the use of four blades and demountable spacers.

Fig. 4 is a sectional view on the line 4-4 of Fig. 3, also in enlarged detail;

Fig. 5 is a plan view of another embodiment of my improved knife especially adapted for ready vvariable spacing of cutting blades, parts being broken away and sectioned to facilitate illustration;

Fig. 6 is a side elevation of the knife of Fig.' 5, parts being broken away;

Fig. '7 is a sectional view on the line 'l-l of Fig. 6; and

Figs. 8 to 11 are perspective views of different forms of demountable cutting blades for use in holders, such as shown in these drawings, or that of my copending application, now Patent No. 2,364,339, issued December 5, 1944.

Referring to Figs. 1 and 2 of the drawings, the tool comprises a central holder 20, generally T- shaped in cross section, and two outer clamping plates 2l and 22, respectively located on opposite sides of the T-shaped holder 20, and pivoted thereto as indicated at 23. As seen in Fig. 2, and as will be further described, the clamping plates 2| and 22, when in assembled positions, are located beneath the respective horizontal portions of the T-shaped center member 20. The holder is relatively narrow from side to side, has its greatest height forwardly of the vertical center line of the holder, tapers downwardly and forwardly rather sharply to the front edge 2li, and tapers rearwardly and downwardly in a more general curve, as 4indicated at 25 to the extended rear end of the holder. The bottom edge 26 l tapers downwardly from the rear point to sub- T-shaped member 20. The posts or keys 28 are triangular in cross section and extend outwardly a less distance than the horizontal portions of the T-shaped member, for rea-sons which will appeal as the description proceeds. The posts 28 are arranged with the bottom edges thereof substantially parallel with the bottom edges of the knife blades.

The cutting knives may be of various shapes, several of which are illustrated in these drawings. In Fig-s. l, 2, and 8, the cutting blades 3|' are wedge-shaped in cross section tapering downwardly from the wide top edge to the. sharpened bottom cutting edge. The blades are provided with a pair of triangular shaped apertures 32 or a size to t upon the posts Z8, and the forward portions of the blades are tapered forwardly and downwardly, as indicated at 33, terminating in a sharpened point 34, which is the portion with which the cutting of the iur skin is done.

A pair of the blades 3i are assembledl upon the central member 2li of the holder, as seen. in Fig. 1, the following procedure being suggested: After the first blade 3i is placed upon its pair of posts 2B, the side plate 2 l' is moved into position, shown in Fig. 2, for which purpose each of the side plates is provided with a pair of triangular shaped openings 35 to also t upon the posts 28. The posts are purposely shortened so that the side plate can be sprung slightly to clear the posts. Next, the clamping screw 35 is passed through registered openings 3l and 33 in the side plate 2l and the T-shaped central member 2B, respectively. It will be noted that the openings are as near the vertical center line of the blades as possible, and also occur just above the blades, although the screw could be arranged to pass through the blades, if desired.

After the first blade is located as described,

the second blade 3l is placed upon its pair of posts 28 and the clamping plate 22 is brought intoposition as shown in Fig. 2. The side plate 22 may be provided with a slot 39 for the screw 36, in addition to the openings 35 for the posts 28, as already described. Finally, a wing nut 4! is applied to the bolt 35 and is tightened up to securely lock all the parts in the assembled positions. It will also be understood that the bolt and nut arrangement are merely indicative of a clamping means, any suitable arrangement being contemplated that will fasten the blades in place.

It will be observed from Figs. 1 and 2 that 'substantially all of the side areas of the blades are covered so that the protruding cutting points will be protected from lateral vibrations as would be caused if the blades were not so sustained; and further that the complementary triangular shaped posts and blade openings perform several functions, such as properly locating the blades to align the same, taking up all thrusts and stresses on the blades when in use, and preventing turning of the blade should lt accidentally come loose from oneof the keys.

Figs. 3 and 4 show a multiple bladed knife similar in general construction to that shown and described in connection with Figs. 1 and 2, except blocks 54 of corresponding widths are provided whereby more than two blades can be mounted for simultaneous use. These blocks are provided with triangular shaped openings (not shown) of a size and location to enable the blocks to be` mounted upon the posts 49.

The cutting blades 53 are wedge shaped from top t0 bottom, as shown in 4, and each blade has a pair of triangular shaped openings 55v (Fig. 9)y also of a size and location to t upon the posts 49. In this form of blade, the top of the blade is tapered toward each end so as to provide a cutting point 56 at each end of the blade, and the Whole bottom edge 5l of the blade is sharpened. Thus, when one set of cutting points becomes dull, the blade can be turned around to use the other set oi points 55 before re-sharpening or replacement.

The assembly ofv the instrument of Figs. 3 and 4 will be apparent from a consideration of Fig. 4, and the preceding description of Figs. l and 2. A blade 53, followed by a spacer 54, followed by another blade 53, are applied to one set of posts 49, and the associated side clamping plate is also positioned upon the posts. This assembly is repeated for the opposite side of the holder 45, whereupon the bolt 52 is inserted through the opening and clamping nut 5l is applied to clamp the blades and spacers in operative position with the blades all equi-spaced. Thus, the operator is able to make four cuts with one downward motion of the instrument. If he desires to make only three cuts at one time, one oi the end blades 53 is omitted in the assembly; and the side plates are suiiiciently thin and exible that this can be done without damage.

Figs. 5, 6 and 7 show a construction in which the saine holder may be used with different spacings of the cutting blades, and different numbers of blades, entirely at the discretion of the user. For purposes of illustration it is shown with live blades. In this embodiment, the holder ii! may be a block having a wide front portion for holding the cutting blades 62 and a narrowed rear portion 63. The underside of the wide front portion is cut out vor recessed, as indicated at 64, leaving a thin side wall 55 along one side of the holder.

A positioning post 65 is inset in the wall 65 and extends entirely across the out out portion 64. As seen in Fig. 6, this post has a square bottom side and a rounded top side, which construction is shown to illustrate another form of angular positioning post suitable for properly positioning the cutting blades in the holder and also maintainingA them in position during use.

Also inset in thefwall 515 to extend across the cut-out portion 54 is the clamping bolt 6l. The cutting blades 62 are provided with openings 58 and 69 (Fig. 10) of sizes and shapes to fit upon the post 66 and bolt 61 respectively. rihe cutting blades are spaced apart by means of spacer blocks 1I which also have openings therein of a size and shape to fit upon the post 55 and bolt 6T. These spacers will be of whatever width the user desires for the spacing of the cutting blades. It also will be noted that the spacers are substantially the same height as the blades, and that the cut-out portion 64 is of a depth to fit the same, to further insure the maintenance of a xed position for the blades in use.

In the assembly of the instrument of Figs. 5, 6 and 7, the blades and the spacers will be alternately threaded upon the positioning post and clamping bolt, and for whatever number of blades and spacing the user may wish, after which the side clamping plate 12, which is pivoted at 13, is moved into clamping position. In order to further insure that the side plate 'l2 may be properly positioned, the holder El may be provided with a projecting flange 14 beneath which the clamping plate will fit. After the clamping plate is in position, a nut (not shown) will be lapplied to the bolt 6l to clamp and hold the parts in assembled relation, as will be understood. Various shapes and constructions of cutting 'blades have been shown and described in connection with Figs. 8, 9, and 10. In Fig. 11 is illustrated a further modied form in which the cutting blade 8i has a sharpened cutting point 82 and an angular positioning aperture 83. This blade also is provided with an additional holding and positioning means on the rear edge thereof which in this embodiment comprises a dovetail 84. The holder for use with a blade with the construction of Fig. 11 will have a dovetail mortise receiving the dovetail 84, as shown, for eX- ample, in my copending application Serial No. 488,705, filed May 27, 1943, now Patent No. 2,364,339, issued December 5, 1944.

It should be noted that the common denominations for all cutting blades illustrated herein are that each has at least one key engaging or receiving aperture which is at least partly angular, and all have two spaced key or indexing portions to position the blade.

Various combinations of the elements illustrated and described herein may be made, and modifications may be made in the constructions illustrated without departing from the spirit and scope of my invention.

I claim:

1. A fur cutting knife comprising a holder for a plurality of demountable blades and having a blade carrying portion integral therewith and arranged to space apart a pair of blades a xed distance, at least two blade engaging keys projecting from opposite sides of said carrying portion, cutting blades mounted thereon and having means complementary with said keys, and means to clamp said blades in fixed operative position.

2. In a fur cutting knife, a holder for a plurality of spaced, demountable blades, and adapted to be held in the fingers of the hand, said holder comprising a forwardly projecting. centrally disposed, blade carrying member integral therewith, an upper portion of said holder overhanging both sides of said blade carrying member, two complementary angular-shaped blade engaging keys projecting from each side of said blade carrying member, a pair of blades mounted on said keys, a pair of blade clamping side pieces pivoted to the rear portion of said holder and adapted to engage said keys, and means to clamp said side pieces and blades to said holder.

3. In a fur cutting knife, a holder for a plurality of spaced, demountable blades, and adapted to be held in the fingers of the hand, said holder comprising a forwardly projecting. laterally disposed, blade carrying member integral therewith, an upper portion of said holder overhanging said blade carrying member, two complementary blade engaging keys cooperating with said blade projecting forwardly thereof, the blade vcarrying member, one of said keys being angular shaped in transverse cross-section and projecting laterally from said blade carrying member, at least a pair of blades and a pair of spacers carried by said member and having means cooperating with said keys, a blade and spacer clamping side piece pivoted to the rear portion of said holder, and adapted to prevent lateral displacement of the blades carried by said blade carrying member, and means to clamp said side piece and blades to said holder.

4. In a fur cutting knife, a holder for a plurality of spaced, demountable blades an-d adapted to be held in the hand in the manner of a writing implement, the holder having a pair of end clamping plates, at least one of which is movable, at least one angular shaped blade supporting and positioning key between said plates, a pair of demountable blades having means complementary with said key, means for spacing the blades apart a predetermined distance, and means for clamping said blades and spacing means between said plates.

5. In a fur cutting knife, a holder comprising a T-shaped center member and a pair of outer clamping plates pivoted thereto, angular shaped keys projecting from opposite sides of the vertical portion of said T-shaped member, a pair of cutting blades having angular shaped openings tting said keys and also having cutting points projecting forwardly from said holder, the clamping plates being positioned beneath the horizontal portions of said T-shaped member, and means for clamping said blades and plates to said holder.

6. In a fur cutting knife, a holder comprising a T-shaped center member and a pair of outer clamping plates pivoted thereto, angular shaped keys projecting from opposite sides of the vertical portion of said T-shaped member, a plurality of cutting blades having angular shaped onenings fitting said keys and also having cutting points projecting forwardly from said holder, spacers cooperating with the vertical portion of said T-shaped member to maintain said blades spaced apart predetermined distances and having angular shaped openings fitting said keys, the clamping plates being positioned beneath the horizontal portions of said T-shaped member, and means for clamping said blades, spacers and plates to said holder.

7. In a fur cutting knife, a holder having a wider front portion and a narrowed rear portion integral therewith, said holder being arranged to be held in the fingers of the hand, the wide portion being recessed, a pair of keys eX- tending across said re-cess, at least one of which is angular shaped, a plurality of cutting blades fitting in said recess and each having a sharpened point, the blades having openings interfitting with said keys and so located as to position said blades with the sharpened points aligned and projecting outside said recess, a plurality of spacers also having openings for said keys and arranged to space said blades apart, and means for clamping the blades and spacers in said recess.

8. In a fur cutting knife, a holder arranged to be held in the ngers of the hand, said holder having a recessed front portion defined by a side wall and a top wall joined together, a pair of keys extending across said recess, at least one of which is angularly shaped, a cutting blade tting within said recess and having a sharpened point also having openings interfitting with said keys, and means on the opposite side vof said recess for 'clamping the blade in said recess.

9. A demountable blade for assembly in a fur cutting knife, said blade having a top edge, a bottom sharpened edge, and side. edges at least one of which is inclined to form an acute angle with the bottom cutting edge and also forming va sharpened cutting point, said blade also having a pair of spaced apart key engaging portions, at least one of which isY shaped to conform to and receive a positioning key which is polygonal in transverse cross-section.

10. A demountable Iblade for assembly in a fur cutting knife, said blade having a top edge, a bottom sharpened edge, and side edges at least one of which is inclined to form an acute angle with the bottom cutting edge and also forming a sharpened cutting point, a pair of spaced apart apertures in said blade shaped to conform to and receive a positioning key which is polygonal in transverse cross section.

1l. A demountable blade for assembly in a fur cutting knife, said blade having a top edge, a bot-tom sharpened edge, and side edges at least one of which is inclined to form an acute angle with the bottom cutting edge and also forming a sharpened cutting point, two spaced index portions positioning the blade, one of said portions comprising an intermediate angular shaped key receiving aperture, and the other of said portions comprising a projecting marginal member.

12. A demountable blade for assembly in a fur cutting knife, said 'blade having a top edge, a bottom sharpened edge, and side edges at least one of which is inclined to forman acute angle with the bottom cutting edge and also forming a sharpened cutting point, the portion of the cutting edge terminating in the cutting point being inclined downwardly with respect to its side edge and extending below the remainder of said bottom cutting edge, and at least one positioning key receiving means in said blade.

13. A demountable blade for assembling in a fur cutting knife, said blade having a top edge, a bottom sharpened edge, and connecting side edges each of which forms an acute angle with said cutting edge and also sharpened cutting points, a pair of spaced apart apertures in said blade at least one of which is shaped to conform to and receive a positioning key which is polygonal in transverse cross-section.

14. A fur cutting knife constructed andarranged to be held in the fingers of the hand and comprising a holder for a plurality of demountable blades and having a blade carrying portion integral therewith, at least two blade engaging keys projecting from said blade carrying portion, cutting blades mounted on said blade carrying portion so as to be substantially co-extensive therewith, each of said blades having a sharpened point at one side thereof projecting beyond said portion and also having means complementary with said keys to align said blade points in operative position, and means to clamp said blades in fixed operative position'.

15. In a furl cutting knife, a holder comprisin a T-shaped center member and a pair of outer clamping plates pivoted thereto, angular shaped keys projecting from opposite sides of the vertical portion of said T-shaped member, a plurality of cutting blades having angular shaped openings fitting said keys and also having cutting points projecting forwardly from said holder, spacers cooperating with ythe vertical portion of said T- shaped member to maintain said blades spaced apart predetermined distances and having angular shaped openings tting said keys, and means for clamping said blades, spacers and plates to said holder.

MAN E. BECKER.

REFERENCES CITD The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 104,706 Codding June 28, 1870 172,739 Hoiman dan. 25, 1876 939,846 Matthews Nov. 9, 1909 1,169,665 Marx Jan. 25, 1916 1,559,536 Alden Nov. 3, 1925 1,810,719 Lowenthal June 16, 1931 1,835,655 Lehmann Dec. 8, 1931 1,903,789 Michaels Apr. 18, 1933 2,186,429 Reinwald Jan. 9, 1940

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