US1730996A - Calk - Google Patents

Description

0a. 8, 1929. J, COW N 1,730,996

CALK

Filed July 21, 1928 widow (596 a/mim Patented Oct. 8, 1929 UNITED STATES JOHN COWAN, OF WAVERLY, MASSACHUSETTS OALK Application filed July 21,

My present invention relates to calks, and more particularly to callrs intended for use on the tread. surfaces of boots or shoes.

A difficulty with previous calks has been the tendency of said calks, during strenuous exercise, walking, or other actions, to work through the tread surface of a boot or shoe, particularly the outsole, permitting the shank of the calk to penetrate through the outsole, filler and insole and cause pain, injury and discomfort to the wearer.

An important object of the present invention, therefore, is to provide a boot or shoe calk which will not work through or penetrate the tread surface to which it is attached.

I accomplish this desirable result by utilizing, in connection with the calk proper, a concave or cup-shaped disc or washer, having the concave surface presented toward the tread surface of the outsole. This disc is of sufficient size and area to present a large bearing surface on the outsole, for example, thus distributing the weight, wear, and strain over a large area, and minimizing the possibility of the call; wearing through or penetrating into the interior of the shoe. I

A further feature of the invention resides in providing means to prevent rotation of said washer or disc. This is an important feature, decreasing wear and penetration, and is also particularly important when the calks and disc are positioned adj cent to the edge of the outsole. In order to position the call: itself as close as feasible to. the outeredge of the sole, I may form said washer or disc with a straight edge, this straight edge being alined with the outer edge of the sole. hen in this particular location, the means to prevent rotation of the washer becomes very important.

I accomplish this desirable result by forming, from the metal of the washer or disc itself, a pair of ears or lugs, preferably pointed, and adapted to be driven into the outsole. These ears, when embedded in the outsole, will effectually prevent rotation thereof.

Another feature of the present invention resides in constructing, on the call: proper, a said flange having an annular groove or recess on its under surf ca, into which 1928. Serial No. 294,399.

groove the highest portion or peak of said disc or washer will seat. This enables the calk to have a sufficient long gripping or ground penetrating portion without extending too far from the tread surface of the shoe.

My novel calk is easy to attach, has great wearing qualities, and increases the life of the shoe to which it is attached, because of the advantages mentioned above.

I believe that the calk illustrated and described herein is novel, and I have therefore claimed the same broadly in the present application.

The above and other ob 'ects of the invention, details of construction, combinations of parts and advantages, will be hereinafter more fully pointed out, described and claimed.

Referring to the drawings, illustrating a preferred embodiment of the present invention,

Fig. 1 is a bottom plan view of a shoe with a number of my novel calks aiiixed thereto;

Fig. 2 is a cross-sectional View, on an en larged scale, of one of the calks in its affixed position in a shoe sole;

Fig. 3 is a perspective view of the calk itself; c

Fig. 4 is a perspective view, on an enlarged scale, of the cup shaped washer or disc;

Fig. 5 is a perspective view, on an enlarged scale, of the washer or disc adapted to be located close to the edge of a sole, and having a straight edge therefor, and I Fig. .6 is a cross-sectional view, on an enlarged scale, of a slightly modified form of call: in its aflixed position in a shoe sole.

Referring now to the drawings, for a par ticular description of the invention, its construction and application, my novel calks are illustrated as attached or applied to a sole 1. These calks comprise two separate portions, viz, a cup-shaped washer or disc, and the calk proper.

Each washer 2 has an aperture 3 there through, through which the shank of the calk is inserted. In order to prevent rotation of the discs 2, after application to a sole,I form a pair of cars or pointed lugs a, 4, thereon. l re disc is applied to the sole, a slight L ming on said disc will. firmly embed said ears in the sole and effectually prevent rotation thereof. This is important, as by preventing rotation of the disc, the injury and damage caused to the sole by rotation thereof are entirely eliminated, thus increasing the life and length of wear of the shoe, and adding to the comfort of the wearer, as rotation of the calks has been a frequent cause of the callis penetrating completely through the sole and injuring the wearer. V

The feature of preventing rotation of the calks is also important when it is desired to place the calks close to the edge of the sole, as illustrated in Fig. 1. V

Vv hen applied close to the edge of the sole, the edge 9 of the disc or washer is alined with the edge 10 of the sole and the disc is then hammered into place. The cars l will penetrate partially into the sole, preventing rotation of the disc as above explained, and thus the discs will not turn, and will never project beyond the edge 10 of the sole. The feature of being enabled to apply my novel calks close to the edge of the sole will appeal to the wearers thereof, and particularly to golfers or other athletes, who rely on a firm, nonslipping grip of the shoe on the turf or ground. A further feature of the present invention is that while the discs 2 are of sufficiently large area to accomplish the purpose desired, they are not sufliciently large to interfere with the flexibility of the sole. 7 The advantages of this feature are obvious and apparent.

Each of my novel calks comprises a threaded shank 5, adapted to be screwed into the sole 1, and a squared head 6. This squared head enables the calk to be applied with a suitable wrench, and tightly screwed into posi tion, the threaded shank 5 passing through the aperture 3 in the disc 2.

At a predetermined location throughout the length of the calk is a flange 7, j referably convex on one side, as at 11, and having, on its under surface, an annular groove or recess 8. This groove 8 accommodates or seats over the peak or highest portion of the cupshaped disc- 2, and thus enables the calk to be inserted further into the sole, and the head 6 to be placed nearer the sole, than would otherwise possible, while still enabling a head 6 of sufficient length for ground gripping pur poses.

The recess 8, also, enables the calk to be screwed down tightly over the discs 2,a'nd thus to form a strong, serviceable and longwearing article.

In Fig. 6 I have illustrated a slightly modified form of calk, wherein the cup-shaped disc 12 has a central concavity 13 therein, the convex flange 14 of the calk seating in this concavity and presenting a substantially flat surface 15 to the ground. The disc has a central aperture therethrough will be understood and as shown in Fig. 6. The calk has a threaded shank 16 for penetrationinto the sole, and has a squared head 17, both the shank and the head being similar to the shank and head 5 and 6 respectively of Figs. 2 and 3.

This form of calk enables the head 17 to be located even closer to the outer surface of the sole 1 than is possible in the form of calk illustrated in Figs. 2 to 4., while still affording ample grip of the shoe upon the turf, sod or ground. The ears 18 are also formed in a manner and for a purpose similar to the ears 4.

The advantages, efiiciency, desirability and wearability of my novel calk will be instantly apparent to golfers and other wearers of shoes having my novel calks applied thereto.

lVhile I have necessarily described my pres ent invention somewhat in detail, it will be appreciated that I may vary the size, shape and arrangement of parts within reasonably wide limits without departing from the spirit of the invention.

My invention is further described and defined in the form of claims as follows:

1. A device of the kind described, comprising a concave-convex disc having an aperture therethrough, a pair of cars formed on the concave side of said disc and intermediate the edges thereof and adapted to penetrate into a sole to prevent rotation of said disc, a calk having a threaded shank adapted to penetrate through said aperture, and a flange around said ,calk having an annular groove on its upper surface adjacent to said shank adapted to receive the peak of said disc.

2. A device of the kind described, comprising a cup-shaped disc having an aperture therethrough, a pair of cars formed on the upper side of said disc and adapted to penetrate into a sole to prevent rotation of said disc, a calk having a threaded shank adapted to penetrate through said aperture, and a liange around said calk, said flange having an annular groove on its upper surface adjacent to said shank adapted to receive the peak of said cupshaped disc.

3. A device of the kind described, comprising a concavo-conve); disc having an aperture therethrough, a pair of prongs formed on the concave surface of said, disc, said prongs being of greater length than the depth of said concavity and adapted to penetrate into a sole to prevent rotation of said disc, a removable calk having a threaded shank adapted to penetrate through said aperture, and a concave flange on said calk, said flange having an annular groove in said concave surface adjacent to said shank adapted to receive the peak of the convex surface of said disc, the remainder of the concave surface of said flange lying against a portion of the convex surface of said disc.

In testimony whereof, I have signed my name to this specification.

JOHN COWAN.

Images