US2072351A

US2072351A - Shoe calk

Info

Publication number: US2072351A
Application number: US732632A
Authority: US
Inventors: Brennan B West
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-06-27
Filing date: 1934-06-27
Publication date: 1937-03-02
Anticipated expiration: 1954-03-02

Description

2, 11937. B. B. W 2,072,351

SHOE CALK Filed June 27, 1934 i C r 5 I 6 'INVENTOR.

ATTORNEY.

Patented Mar. 2, 1937 UNITED STATES PATENT OFFICE 7* 7 Claims.

This application is a continuation of one filed on the 17th day of February, 1931, Serial No. 516,373, now Patent No. 1,975,133, issued October 2, 1934, as to all subject matter which is common to the two applications.

The invention is an improved calk for use on the soles and heels of golf shoes, hunting and hiking boots, and other footwear, and its general objects are to provide a device of this character that may be easily and quickly attached to the sole or heel of a boot or shoe by an operation equivalent to that of driving a nail and that will hold very securely within the material of the sole or heel. Further, to provide a shoe calk that is simple and relatively economical of manufacture, and, more limitedly, to provide a composite shoe calk comprising a solid stud or spike adapted to be produced on automatic machines at low cost, and a pronged ferrule that consists of a relatively inexpensive sheet metal stamping, the parts being adapted to be assembled in the process of applying.

By making the calk of two separate parts, materials especially suited for the respective parts may beselected. For example: the spike or stud, which is subjected to hard wear, may be made of very tough steel or other. material, or it may be hardened after it ismade, and the ferrule, which has a number of prongs, preferably six, that are beveled desirably'on their inner sides at their ends so that they will spread apart as they enter the leather and thus hold securely in the manner of a rivet andwithout penetrating the sole or having to be clenched on a last, may be produced of a grade of sheet steel especially,

suited to the purpose.

In the drawing accompanying and forming a part hereof, Fig. 1 isa perspective view showing one of the calks applied to the toe of a boot or shoe; Fig. 2 is a sectional detail showing the manner in which the prongs of the ferrule spread when driven into the leather; Figs. 3 and 4 are elevational views, respectively, of the. ferrule and stud Fig. 5 shows the ferrule and stud resting upon a surface to which'the calk is to be applied with the stud held central of theferrule by cooperation of its head with the prongs of the latter, the View including also the tool used in driving the ferrule, the ferrule and adjacent end of the tool being in-section; Fig. 6 shows the bottom of a boot or shoe to which a set of calks are applied; and Fig. 7 is a detail of a modified form of the calk.

The calk is designated generally by the reference character A, and its component parts, i. e. the ferrule and stud, are designated B and C, respectively. The ferrule is drawn from sheet metal of suitable gauge and quality to a generally frusto-conoidal shape, an opening b being punched or otherwise formed in its smaller end in such manner that the material surrounding its outer end is reduced to a feather edge. Prongs b, preferably six in number, project, from the larger end of the ferrulein. parallel relation. to each other and spaced equi-distant about the aircumference of the ferrule. The ends of the prongs are beveled or chamfered, desirably on their inner sides, as indicated at 11 for a purpose that will presently appear.

The stud or spike C has a head 0 at one end and is tapered atthe other, as indicated at c, the body portion of the stud being straight or cylindrical, as shown at. 0 According to the present embodiment, the head 0 is circular and flat. The opening b of the ferrule is of a size to receive snugly thebody portion c of the stud, and the head 0 closely fits within the interior of the larger end. of the ferru1e,.and when forced as far as itwill go into the same the circular face of the head is substantially flush with the edge of the larger end of the ferrule, and the angle between the body portion and. the tapered end of the stud is, about coincident with the feather edge of the smaller end of the ferrule. The taper of the external surface of the smaller end of the ferrule blends into the taper of the stud when the parts are properly assembled.

In applying. the calks to the sole and heel of a boot or shoe, marks may be made at the points Where the calks areto be located and the boot or shoe disposedon alast. A stud or spike is then placed in position on the sole or heel, with a ferrule engaged over it, and the tool D is applied, as indicated in Fig. 5. The tool istubular, or is provided with a socket d, and the annular end of the tool is engaged with the shoulder between the larger and smaller ends of the ferrule, the tapering smaller end guiding the tool to its seat upon the shoulder. It will be observed that the shoulder is substantially in alignment with the prongs b. Now by pounding the tool with a hammer or the like, in the manner of driving a nail, the prongs may be driven into the leather,

the stud, in the meantime, being retained central When the stud and. ferrule attain their final assembled condition, the, former fits very: tightly within the latter and the calk, as a whole, is rigid upon the sole or heel. The tapered, smaller end of the ferrule serves not only as a guide for properly positioning the tool upon the shoulder of. the ferrule, but it greatly assists in firmly holding the stud perpendicular to the surface to which the calk is applied, notwithstanding the very severe side thrusts imposed upon the calk when in use.

Fig. 7 shows the original form of the composite calk as disclosed in the parent application hereinbefore referred to. The ferrule F, in this case, has a central opening f for the accommodation of the body portion 9 of the stud G. It is dished to receive the head g of the stud and is provided with four prongs I that are chamfered or beveled at F.

Having thus described my invention, what I claim is:

1. A shoe calk consisting of a solid metallic stud, and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the stud having a flat head and a straight body portion adjacent the same, and the ferrule having an opening for the reception of the straight body portion of the stud and formed about said opening to receive the head, the ferrule being provided with a plurality of prongs extending from its edge in parallel relation to each other and spaced about a circle corresponding substantially to the circumference of the head, the ferrule being adapted to be placed over the stud with its prongs engaging a surface into which they are to be driven through the intervention of a socketed tool applied to the ferrule, the prongs cooperating with the head of the stud to retain the stud central of the ferrule during the driving operation, the ends. of the prongs being chamfered on their inner sides to a depth notexceeding the thickness of the head.

2. A shoe calk consisting of a solid metallis stud, and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the

stud comprising a body portion provided with a,

head at one end, and the ferrule having an opening for the reception of the body portion of the stud and formed about said opening to receive the head, the material of the ferrule surrounding F the opening being projected so as to extend a substantial distance along the body portion of' the stud, the ferrule being provided with a plurality of prongs extending from its edge.

3. A shoe calk Consisting of a solid stud, and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the stud having a straight body portion provided with a head at one end and tapered at the other, and the ferrule having an opening for the reception of the straight body portion and formed about said opening to receive the head, the material of the ferrule surrounding the opening being projected so as to extend a substantial distance along the body of the stud and tapering off to a feather edge so that the exterior surface of the ferrule merges into that of the tapered end of the stud, the ferrule being provided with a plurality of prongs extending from its edge in parallel and closely spaced relation to each other about a circle corresponding substantially to the circumference of the head.

4. A shoe calk consisting of a solid metallic stud, and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the stud comprising a body portion provided with a head at one end, and the ferrule having an opening for the reception of the body portion of the stud and formed about said opening to receive the head, the material of the ferrule surrounding the opening being projected so as to extend a substantial distance along the body portion of the stud, the ferrule being provided with a plurality of prongs extending from its edge in parallel and closely spaced relation to each other about a circle corresponding substantially to the circumference of the head, the ends of the prongs being chamfered.

5. A shoe calk consisting of a solid stud, and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the stud having a straight body portion provided with a head at one end and tapered at the other, and the ferrule having an opening for the reception of the straight body portion and formed about said opening to receive the head, the material of the ferrule surrounding the opening being formed to extend a substantial distance along the body of the stud and tapering off to a feather edge so that the exterior surface of the ferrule merges into that of the tapered end of the stud, the ferrule being provided with a plurality of prongs extending from its edge in parallel and closely spaced relation to each other about a circle corresponding substantially to the circumference of the head, the ends of the prongs being chamfered on their inner sides to a depth not exceeding the thickness of the head.

6. A shoe calk consisting of a solid metallic stud and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the stud having a head at one end and being tapered at the other, and the ferrule consisting of a substantially frusto-conoidal shell having an opening in its smaller end arranged to snugly receive the body portion of the stud and recessed to accommodate the head thereof, the external surface of the smaller end of the ferrule merging into the tapered end of the stud when the parts are assembled, the ferrule being provided with a plurality of prongs extending from its larger end in parallel relation to each other, there being a shoulder about the outer side of the ferrule in substantial alignment with the prongs onto which the perimeter of a socketed or tubular tool is adapted to be guided by engagement with the smaller end of the ferrule.

7. A shoe calk consisting of a solid metallic stud, and a separate sheet metal ferrule, adapted to be assembled in the process of applying; the stud having a flat head at one end of its body portion, andthe ferrule having an opening for the reception of the body portion of the stud and formed about said opening to receive the head, the ferrule being provided with a plurality of prongs extending from its edge in parallel relation to each other and spaced about a circle corresponding substantially to the circumference of the head, the ferrule being adapted to be placed over the stud with its prongs engaging a surface into which they are to be driven through the intervention of a socketed tool applied to the ferrule, the prongs cooperating with the head of the stud to retain the stud central of the ferrule during the driving operation, the ends of the prongs being chamfered on their inner sides to a depth not exceeding the thickness of the head.

BRENNAN B. WEST.