US2266575A - Shoe heel - Google Patents

Description

Dec. 16, 1941. A. c. TREECE SHOE HEEL Filed Dec. 3, 1938 2 Shee ts-Sheet l UNDE RCUT MACHINED IN AFTER MOLDING Inventor Arthur C. Treece,

Their- Attorney Dec. 16, 1941. A. c. TREECE SHOE HEEL 2 Sheets-Sheet 2 Filed Dec. 3, 1938 Inventor nil/l/l/l/l Arthur C. Treece, b fim a 2W Them Attorney.

Patented Dec. 16, 1941 2,266,575 snon uni-:1.

Arthur C. Treece, Chicago, Ill., assignor to General Electric Company, a corporation of New York ' Application December 3, 1938, Serial No. 243,798

7 Claims.

The present invention relates to the construction of a shoe heel, and more particularly to the production of molded shoe heels adapted to be fitted in the conventional manner, as by nailing, to any kind of footwear.

For ladies dress shoes in particular, but also for other types of shoes, wooden heels" have been commonly used, these being nailed to the sole and provided with a veneer of cellulose nitrate, thin inferior leather, or similar sheet material, suitably colored'and polished in order to give the wooden heel a desired ornamental appearance. The wood tended to split or chip, thereby ruining the heel and to some extent the shoe, as repairs could not readily be made. Further, accidental abrasions of the thin veneer often spoiled the appearance of the shoe before any considerable use had been made of it.

It has been suggested heretofore to use, in-

stead of the usual built-up leather or wooden.

heels, heels formed of metal or of different plastic molding compositions such, for example, as phenolic resins, hard rubber, cellulosic substances such as cellulose nitrate, cellulose acetate and ethyl cellulose, as well as other materials. Various constructions and fastening means have been proposed to secure heels of this kind tothe footwear, but to the best of my knowledge none has met the general requirements of shoe manufacturers either because of impracticability or because of the increased'cost involved.

It is an object of the present invention to provide a novel shoe heel.

It is a further object of the invention to provide a strong, molded shoe heel which is light in weight and which can be rigidly fastened easily and quickly to a shoe or other footwear. The preferred embodiment can be fastened to the shoe sole with conventional automatic nailing machines such as used in nailing wooden heels to soles. portance to shoe manufacturers, since it renders unnecessary capital investment in new machinery, and avoids the.increased production costs which otherwise might occur in changing from the use of wooden heelsin shoe construction to heels molded from plastic synthetic resin masses v tion with the accompanying drawings in which Fig. 1 is a side view of a'shoe embodying'the This is a matter of great practical iminvention, with heel-attaching means shown in v outline;

Fig. 2 is a perspective view of a heel illustrating one embodiment of the invention;

Fig. 3 is a side-sectional view of the heel of Fig. 2, with the heel lift or tap portion thereof shown in perspective and pulled away from the main heel portion;

Fig. 4 is a perspective view of a heel illustrating another embodiment of 'the invention and which has fitted into the upper portion thereof a heel-pin guide member or inset which is made separately from the main body portion;

Fig. 5 is a view similar to Fig. 4 showing the heel-pin guide member separated from the main body portion;

Fig. 6 is a perspective view of a heel illustrating another embodiment of the invention;

Fig. 7 is a perspective view of another type of heel tap or lift with which the heels of this invention may be fitted; and

Figs. 8 and 9 are side sectional and bottom plan views, respectively, of a heel construction whereby a tap (not shown) of leather or the likecan be nailed directly to the main heel por-' tion.

Briefly described, this invention comprises the production of a shoe heel having within the boundaries'of its side walls a plurality of spaced apart guides for heel pins, nails, screws, etc., for attaching the heel to the shoe. 'I'hese guides extend partly but not completely downwardly through the heel. The walls defining these guides are constituted of molded and hardened plastic material which in such state is penetrable by, and capable of gripping firmly, the heel pin or other elongated heel fastener employed. Usually the entire main body of the heel is made of the same plastic material as the guide walls, which may be molded as an integral part of the main heel portion. Suitable means are provided for retaining the guides in their spaced positions and for attaching a heel tap or lift to the bottom of the heel. The scope of the invention also includes shoes provided with the herein described and claimed shoe heels. The term "shoe as used herein is intended to include within its meaning all kinds of footwear.

Referring to the drawings, it will be noted that the shoe heels shown in the various figures comprise an upper main body part or portion which in Fig. 1 is designated by the numeral ID, in Figs. 2 and 3 as Illa, in Figs. 4 and 5 as lob, in Fig. 6 as I00 and in Fig. 8 as llld. To the lower end of the main body part is fastened a heel tap or lift designated by the numeral H in Figs. 1, 2, 4, and 6, and as Ho and lib, respectively, in Figs. 3 and 7.

The main body portion preferably is molded as a unitary structure from a suitable plastic molding composition such, for example, as a mixture of phenolic resin and a suitable filler. The mass is molded into the desired shape under heat and pressure in accordance with methods well known in the art. Instead of phenolic resin other plastie and resinous materials may be used as, for example, hard rubber, acrylate and methacrylatc resinous compositions, cellulosic plastics such as those made with cellulose nitrate (pyroxylin) organlc esters of cellulose such as cellulose formate, cellulose acetate, cellulose butyrate, cellulose propionate, and cellulose ethers such as methyl cellulose, ethyl cellulose, benzyl cellulose, etc. The molding composition either may be so chosen that the main heel body is transparent, or so that the exterior surface has a high luster, or such a luster may be secured by polishing with a suitable buifing composition.

Especially in the case of ladies dress shoes the upper wall l2 (Fig. 2) of the main body portion preferably is made in concave form, thereby permitting a better fit and grip of the heel to the shoe. Such shoes also preferably are provided with an extension I! protruding from the upper front wall I4 and suitably shaped for joining with the instep of the shoe.

As shown in several figures of the drawings, the main body portion has within its side walls a plurality of spaced apart guides or guide wells ii for receiving or guiding the heel pins i6 (Fig. 1) used in attaching the heel to the shoe. The guides I! may be arranged, for example, as shown in Figs. 2 and 3, that is being so spaced and in such number as to give the upper wall I2 of the heel a honeycomb appearance. with such construction no difilculty is encountered in driving the heel pins I. into the heel with conventional automatic nailing machinery. Preferably, although not necessarily, the guides are countersunk as shown at lia (Figs. 3 and 8). The guides extend partly but not completely downwardly through the heel, thereby permitting the heel pins to penetrate, and to be gripped by, the walls of hardened plastic material defining the guides. In general, the depth of the individual guides is varied in conformity with the contour of the heel.

The diameter and shape of the guides may be varied. In general, these details are determined by the particular heel fasteners employed. Since nails or pins are the common heel fastening means, the guides conveniently are tube shaped and of a diameter such as tofavor entry of the heel pin into the guide. It is not necessary that the heel pin completely fill the guide chamber. With automaticshoe nailing machinery, the pins are driven intothe heel ata slight angle from the vertical, thereby improving their effective grip. In such a case, the pins will pass at an angle into the walls defining the guides and will only partly occupy the guide chamber. Likewise it is not necessary that the pins enter the heel at the mouth of the guides, because the nature of the plastic material itself is such that it can be penetrated by the heel pin. The guides or guide wells in this case provide a place for movement of material which is displaced by penetration of the heel pin into the plastic material. In this way stresses tending to split the heel are relieved and otherwise would impair the fit of the heel on the shoe.

If desired, suitable recesses may be provided in the main body of the heel to decrease its weight, thereby lessening the amount of plastic material required and correspondingly reducing the production cost. Such a recess is shown, for example, at ll in Figs. 2 and 3. When a heel tap such as shown at Ila in Fig. 3 is employed, the wall ll (Fig. 3) advantageously is of such configuration as to provide a depression therein as shown at is (Fig. 3). The tap Ha comprises a base 20, which may be made, for example, of leather, rubber or of suitable transparent, translucent or opaque synthetic material. This base is provided on its top with an attaching stud 2|, made for instance of metal or of other suitable material. This stud is adapted to pass through the opening defined by the rim 22, and expands over the rim thereby to hold the tap firmly to the heel under all conditions of ordinary wear. Another form of such tap, which may be made if desired entirely of rubber, or of other yieldable material, is shown in Fig. 7. The particular tap constructions shownare not a part of this invention.

In some cases a screw 23, as well as a plurality of nails ii (for example five) are used in attaching the heel to the shoe, as indicated in Fig. 1 where one screw and three nails are shown by way of illustration. When a screw (or screws) is used, the upper wall I2 is suitably drilled to receive the same after the heel has been placed in position upon the shoe. In this case, the guide wells may be omitted, if desired, as shown for example at 24 (Fig. 2), from the portion of the wall l2 which the screw penetrates.

The heel shown in Figs. 4 and 5 provides the advantages of the honeycomb structures previously described, but with considerable savings in material. This heel comprises a hollow shell 25 of firm structure having in its upper portion an inwardly projecting flange or land 28. A heelpin guide member or inset 21 is of such size and shape as to be adapted to fit snugly within shell 25 on flange 26. This inset is formed of suitable molded and hardened plastic material, which is capable of being penetrated and gripped by heelattaching pins, examples of which material previously have been given. The shell 25 may be formed of the same material. Or, if desired, it may be formed of different material, as for example metal of adequate strength. The guides I! penetrate the inset 21 and preferably are so spaced apart and in such number as to give this member a honeycomb appearance. Preferably 'these guides extend only part way downwardly through the inset, thus providing a bottom base in each guide for such heel pins as may reach that point.

The inset 21 is held rigidly in position by any suitable means. For example, when the shell 2! and the inset 21 are formed of a material such as cellulose acetate, the surfaces of the inset that are to contact the shell may be dipped in, or sprayed with, a suitable solvent, such for instance as acetone, thereby softening these surfaces. The efiect of this acetone softening is to permit the inset and the shell to fuse or weld together in a solid structure.

The lower end of the main body portion llb (Figs. 4 and 5) may be constructed as shown in Figs. 3 and 8, either construction providing suitable means for attaching the tap or lift I I.

there is no eruption on the upper surfaces which The heel construction shown in Fig. 6 has certain advantages, as for example less material is required, but is not so satisfactory as the other constructions shown when the heel is to be attached to a shoe with automatic nailing machinery. The heel shown comprises a shell 28 provided with guides I held in spaced relation from each other and from the core 29 by the fins 30. The finsand the walls defining the guides merge into the back and side walls defining the heel. The core 29, which may be hollow or solid, merges into the back wall of the heel. With this construction, which provides a heel that is strong and light in weight, heel taps or lifts such as shown in Figs. 3 and 7 are employed.

The heel shown in Fig. 8 represents a modification wherein bottom guides or guide wells 3| are provided so that a tap (not shown) of leather or the like can be nailed directly to the main body portion [0d of the heel.

The heels of this invention may be formed of a transparent, translucent or opaque molding composition in any desired color, plain or mottled. They can be readily and permanently polished,

and are readily re-polished should they become the appended claims is intended to include within its meaning pins, nails, screws and other elongated fastening means, formed of metal or equivalent material, and used in attaching a heel to a shoe.

WhatI claim as new and desire to secure by Letters Patent of the United States, is:

l. A shoe heel comprising a hollow shell of firm structure having the configuration of a heel and having in its upper portion an inwardly projecting flange, a heel-pin guide member adapted to fit snugly within said shell on said. flange and being formed of molded and hardened plastic material which in such state is penetrable by heel pins for attaching the heel to a shoe, said member being rigidly held in position by suitable means and having within the boundaries of its side walls a plurality of heel-pin guides so spaced apart and in such number as to give the said member a honeycomb appearance.

2. A shoe having attached thereto with heel pins a shoe heel comprising a hollow shell of firm structure having the configuration of a heel and having in its upper portion an inwardly projecting flange, a heel-pin guide member adapted to fit snugly within said shell on said flange and being formed of molded plastic material penetrable by the said heel pins, said heel-pin guide member being rigidly held in position by suitabe means and having within the boundaries of its side walls a plurality of heel-pin guides so spaced apart and in such number as to give the said member a honeycomb appearance, and a heel tap or lift suitably fastened to the bottom of the said shell.

3. A shoe heel as in claim 1 wherein the hollow shell is formed of a molded plastic material.

4. A heel member comprising a hollow shell of firm structure, said shell having the configuration of a shoe heel and having in its upper portion an inwardly projecting flange to which is securely fastened a heel-pin guide member of substantial thickness, said guide member fitting snugly within said shell on said flange and having within the boundaries of its side walls a plurality of heel-pin guides so spaced apart and in such number as to give the said member a honeycomb appearance, the walls defining said guides being formed of resistant but yielding material penetrable by heel pins for attaching the heel to a shoe,'and means for attaching a heel tap or lift to the said shell.

5. An article comprising a hollow shell of firm structure having the configuration of a shoe heel, an extension protruding from the upper front wall of the said shell and suitably shaped for joining with the instep of a shoe, an inwardly projecting flange in the upper portion of the said shell, 9. heel-pin guide member adapted to fit snugly within said shell on said flange and being formed of resistant but yielding material penetrable by heel pins for attaching the heel to a shoe, said member being rigidly held in position by suitable means and having within the boundaries of its side walls a plurality of heel-pin guides so spaced apart and in such number as to give the said member a honeycomb appearance, and a heel tap or lift suitably fastened to the bottom of the said shell.

6. An article as in claim 5 wherein the hollow shelLis formed of a molded plastic material.

7. A shoe heel comprising a hollow shell of firm structure having the configuration of a heel, a land of substantial thickness in the upper inner portion of said shell and integral therewith, a heel-pin guide member adapted to fit snugly within said shell and having a lower, outer portion thereof resting on the upper surface of said number as to give the said member a honeycomb

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