US643539A - Shears. - Google Patents

Description

No. 643,539. Patented Feb. [3, I900.

G. B. ROWE.

8HEARS.

Application med June 10, 1899.) (No Model.) 2 Sheets-Sheet l.

5 wvewboz No. 643,539 Patented Feb. I3, 1900.

G. B. ROWE.

SHEARS.

'AmvlicaJ-ion filed June 10, 1899.) (No Model.) 2 SheetsSheei 2.

we NORRIS FETERS 50.. PHOTO-LITHO., WASHINGTON, m c

UNITE STATES PATENT OFFICE.

GEORGE B. ROWE, OF MOORE, OKLAHOMA TERRITORY.

SHEARS.

SPECIFICATION forming part of Letters Patent No. 643,539, dated February 13, 1900.

Application filed June 10, 1899. $erial No. 720,074.. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE B. ROWE, a citizen of the United States, residing at Moore, in the'county of Cleveland, Oklahoma Territory, have invented certain new and useful Improvements in Shears; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to shears and scissors, the object being to provide an article of this type having double cutting edges whereby smooth or bearded cutting edges may be brought into position for active operation, as desired and found most advantageous, according to the nature of the article to be cut.

Theimprovement consists, primarily, of the special formation of the shear-blades and the means for adjustably connecting the handles therewith, whereby either set of cutting edges may be brought into position for convenient operation.

The improvement also consists of the novelv features, details of construction, and combinations of parts, which hereinafter will be more particularly set forth, illustrated, and finally outlined in the subjoined claims.

The invention is susceptible of application to any make or style of shears orscissors. Hence it is to be understood that in the practicalembodiment thereof various changes in the form, proportion, and minor details of construction may be resorted to without de parting from the spirit or sacrificing any of the advantages of the invention.

Referring to the drawings forming a part of the application, Figures [and 2 are detail plan views of the shears, showing the smooth and the toothed or bearded cutting edges in cooperative relation. Fig. 3 is a view showing the shear-blades and handles adjusted to adapt the device for cutting cord, seams, and analogous articles. Fig. 4 is a View of the inner side of a shear-blade and attached handle. Fig. 5 is a detail view of the butt-end portion of a shear-blade. Fig. 6 is a detail View of a handle. Fig, 7 is a reverse View of the handle. Fig. 8 is a detail View of the nut cooperating with the handle to secure it against accidental slipping. Fig. 9 is a transverse section of the shears about in line with the pivotal connection of the blades. Fig. 10 is a detail longitudinal section. Fig. 11 is a detail view of the pivot-fastening. Fig. 12 is a detail view of the spring locking-wedge.

Fig. 13 is a detail view of the clamp-screw and washer pivotally con nectinga handle with a shear-blade. Fig. 14 is a detail view of a different form. Fig. 15 is a section on the line Y Y of Fig. 14.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The shear-blades 1 are of like formation and are provided with double cutting edges, one edge, as 2, being smooth and the opposite edge 3 toothed or bearded. The blades are preferably of concavo-convex form,'the inner or opposing sides or faces being hollow, thereby admitting of the edges being in a measure self-sharpening or readily maintained in grooves 5, formed along an edge portion of each blade upon the outer surface thereof,

said grooves being parallel and rearwardly inclined and comprising a straight wall and an inclined wall, whereby the teeth of the bearded cutting edge incline toward the point of the shear-blades in the manner of sawteeth, whereby the best results are attained in the use of the shears.

The segment heads 4 project beyond the cutting edges of the shear-blades, and their terminal portions provide lateral cutting edges 6 and 7,the cutting edges 6 being smooth and the cutting edges 7 toothed or bearded. These lateral cutting edges are relatively divergent and, with the contiguous portions of the longitudinal cutting edges 2 and 3, form approximately wedge or triangular shaped spaces to receive heavy seams, cord, or the like requiring to be out, said cord or analogous heavy article being cut by a shear action between four cutting edges, as will be readily understood upon reference to Fig. 3 of the drawings.

The shear-blades are best formed by being struck up or stamped from sheet metal, the outward deflection thereof between the longitudinal edges stiffening and strengthening them. Filling-blocks 8 are riveted or otherwise secured to the hollow sides of the blades near their inner or butt ends and stiffen them and provide an extended bearing for the pivot-fastening 9, by means of which the blades are connected, openings extending transversely through the filling-blocks and blades and having coincident relation, so as to admit of the blades lying the one against the other. The pivot-fastening 9 is headed at one end, and its opposite end is formed in its sides with notches 11, which receive the portions of the locking-wedge 12 upon opposite sides of the longitudinal slot 1.3. This pivot-fastening is passed through the registering openings 10 of the shear-blades when properly positioned, and thelocking-wedge 12 is fitted tothe notched end thereof. Theslot13 of the locking-wedge is enlarged at one end, as shown at 14, to admit of the terminal portion of the pivot-fastening passing therethrough, whereby the opposite notches 11 may be brought into position to receive the edge portions of the wedge bordering upon the slot 13, the wedge being engaged with the notches 11 by a longitudinal sliding movement. The locking-wedge curves longitudinally and holds the shear-blades together by a spring action, thereby admitting of the blades yielding to obviate injury to their cutting edges.

The handles 15 are of like formation, and each is provided at one end with an eye or loop 16 for the reception of a thumb or finger of the hand and an expanded portion 17 at the opposite end. An opening 18 is formed centrally of the terminal portion of the part 17, and is adapted to receive the fastening 19, by means of which the handle is pivotally connected with its shear-blade. An areuate slot 20 is formed in the expanded end 17 concentric with the opening 18 and receives the fastening 21, by means of which the handle is adjustably secured to the shear-blade. The inner face of the part 17 is toothed or roughened, as shown at 22, to match corresponding teeth 23 or corrugations formed in the outer face of the segment head 4, the two sets of teeth 22 and 23 interlocking, so as to prevent slipping of the handle when moved to the required position. The fastening 21 consists of a clamp-screw passing through an opening 24, formed in the segment head 4, and receives a nut 25 at its outer threaded end, said nut being toothed or roughened upon its inner face, as shown at 26, to engage with corresponding teeth or corrugations 27, formed upon the outer face of the expanded end 17, adjacent to the arcuate slot 20. These means supplement the action of the fastening 19 to hold the handle firmly to the expanded end of the shear-blade in the desired position.

The fastenings 19 consist of headed screws 28 and thumb-nuts 29 and pass through corresponding openings formed in the shearblade and handle. One of the headed screws is formed with a square or angular portion 30 to receive a washer 31, which is mounted thereon and interposed between the handle and the thumb-nut, said washer preventing turning of the screw when loosening the thumb-nut to admit of an adjustment of the handle. The outer face of the expanded end 17 is convex and the adjacent face of the washer is concave. Hence the washer is prevented from turning when loosening the thumb-nut sufficiently to admit of an adjustment of the handle when the fastening 2]. is loosened. The opposite headed screw 28 is formed with flattened or notched sides 32 to enter the slot 13 of the locking wedge, whereby said screw is prevented from turning when operating the thumb-nut 29 either to tighten or loosen the fastening 19.

For convenience of operation the handles are adjusted relatively to one side or the other of the longitudinal center of the respective shear-blades, depending upon the nature of the cutting edges required to be brought into active operation. \Vhen it is required to shift the position of the handles with reference to the shear-blades, the fastenings 19 and 21 are loosened to admit of a disengagement of the interlocking teeth or corrugations of the matching parts, when the handles can be moved to the required position. A retightening of the fastening previously loosened will effect a securement of the handles in the located position. Some of the various positions of the handles are illustrated in Figs. 1, 2, and 3, the same admitting of the different cutting edges being brought into position for effective service.

In the form shown in Fig. 14 the shearblades 1 are formed with shanks 33, which are wed ge-shaped in cross-section to interlock with dovetail mortises 34 in the tangs 35 of the handles 36, said handles being detachable, so as to be reversed when changing the relation of the blades to bring a different set of cutting edges in position for active operation. The shear-blades are connected in the manner hereinbefore set forth. Fastenings 37 connect the handles to the shanks of the blades, and each has a notch 38 in its side in the plane of the shank, so as to be brought in register therewith to admit of a detachment of the handle. The openings through which the fastenings 37 pass intersect with the dovetail seats or mortises 34, and when the fastenin gs are turned to throw the notches 38 away from the shanks 33 the latter and the handles are made fast.

Having thus described the invention, what is claimed as new is- 1. Scissors or shears comprising a shearblade having double cutting edges, one being smooth, the other roughened or toothed, substantially as set forth.

2. Shears or scissors composed of shearblades, each comprising double cutting edges, the one smooth, the other roughened or toothed, and adapted to have either the smooth or the toothed cutting edges brought into position for active operation.

3. Shears or scissors composed of blades each having one edge smooth and its opposite edge toothed, a multiplicity of grooves in its outer side along one edge forming the said teeth, substantially as set forth.

4. Shears or scissors composed of blades having double cutting edges and of concavoconvex form in transverse section, one of the edges being smooth and the opposite edge toothed and formed by rearwardly-inclined grooves in the outer face of each of the blades along an edge portion thereof, substantially as described.

5. In shears or scissors having the butt or pivotal ends of the blades expanded and approximately of segmental form, with the projecting terminals of the expanded portions forming lateral cutting edges, handles adjustably connected with the expanded ends of the blades to bring either set of lateral cutters into active operation, substantially as described.

6. In shears or scissors having the butt or pivotal ends of the blades expanded and approximately of segmental form, with the projecting terminals of the expanded portions forming lateral cutting edges, one set of cutting edges being smooth and the other set toothed, handles having adjustable connection with the segmental ends of the blades to bring either the smooth or the toothed cutting edges of the said segment-formed ends into position for active operation, substantially as set forth.

7. Shears or scissors having oppositely-disposed offstanding portions adjacent to the pivot of the blades forming outwardly-ex tending cutters, one of which is smooth and the other toothed or roughened, substantially as set forth.

8. Shears or scissors having their butt-ends expanded to form approximately segment heads,handles having pivotal connection with the shear-blades, one of the parts having an arcuate slot and a fastening adapted to enter the said slot and secure the handle in an adjusted position, substantially as set forth.

9. In shears or scissors, a blade having. its butt-end expanded forming a segment head, a handle having pivot connection with the expanded portion of the blade and provided with an arcuate slot concentric with said pivot-fastening, and means for securing the handle to the expanded portion of the blade and operating in the arcuate slot of the handle, substantially as set forth.

10. In shears or scissors having adjustable handles, a pivot fastening connecting the blades, a locking-wedge for securing said pivot-fastening, and a fastening for the locking-wedge and adjacent adjustable handle for fixing the position of both, substantially as described.

11. In shears or scissors, the combination with the blades, a pivot-fastening connecting the blades and having an end portion formed with opposite notches in its sides, an adjustable handle applied to one of the blades, a fastening for securing said handle to the blade in an adjusted position, a spring lock ing-Wedge adapted to cooperate with the pivot-fastening of the blades and receiving a reduced portion of the fastening between the handle and blade in its slot, whereby said fastening is maintained in a normal position when being tightened or loosened, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE B. ROWE.

Witnesses:

FRANK BRUCE, W. H. SCALES.

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