US 2181110 A
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Nov. 21, 1939. H, ESSER 2,181,110
HEEL WITH EXHANGEABLETIP Filed Jan. 19. 1939 /nvenol' 4. Allomey Pafen'fea Nov. 21, 1939 UNITED STATES ,PATENT ori-lcs In Germany January 22, 1938 Y A 'I'his invention relates to a heel for footwear with exchangeable tip. Such heels are known, in which the tip ts on a projection provided on the recessed portion of the heel and is held on the heel by the engagement of dove-tailed projections in correspondingly shaped grooves in the heel.
The disadvantage of these known heels with exchangeable tip is that the xation of the exi changeable tip does not meet the requirements which are essential for practical use. This is due t'o the fact that, for anchoring the tip, devicesare used which are not capable of withstanding the distortions whichl occur when walking, with the result that the tip can easily become detached.
Moreover, these anchoring devices are also partly' worn by walking. It must also be pointedout that the production of these heels, owing to their complicated construction are unprofitable for n the manufacturers and their use for the consumer is impractical.
I All these objections are avoided by the inven- .tion in that the projectionprovided on the recessed portion of the heel forms with the opposite s oblique face of the heel a continuous groove for the purpose of anchorage.
Other features of the invention will become apparent from the following description.
l'I-wo embodiments of the invention are illusj trated by way of example in the accompanying drawing, in which:
Fig. 1. shows in bottom plan View a heel with exchangeable tip,
Fig. 2 is a similar view to Fig. `1 `showing the -heel with the tip removed, i
Fig. 3 is a section on line A--B of Fig. `2,
Fig. 4 shows the heel in rear elevation,
Fig. 5 shows a modified form of construction in section on line C--D of Fig. 2.
y The heel is designated by l and the tip by 2. For the purpose of exchangeability .the tip is anchored on the heel in that the heel body has a plate-shaped projection 3 whose shape lcorresponds to that of a recess in the under side of 5 lthe tip. The dimensional proportions between the plate-shaped projection 3 and the recess in the tip are chosen so that, if the tip is made of elastic material, it is stretched over the projectionA 3 and thus secured against horizontal 3 movement. For securing vthe tip against vertical movement the straight edge of the tip is undercut at a sharp angle and this undercut edge engages under a counter bevel on the rear abutting edge of the 'heel body as shown in Fig. 3. The dls- 5 tance between the inner edge a of the plateshaped projection and the oppositepoint c of the abutting edge of the heel body is smaller than the width at the bottom d of the groove. The bearing edge of the tip 2 and the bearing edge on the heell are cut to't one another. For 5 securing the tip in position a projection lis formed at the curved edge of the tip, for example in the shape of a dove-tall, and engages in a correspondingly shaped recess in the heel.
The foregoing shows' that it is now possible, 10 when the tip is of elasticmateriahto press by hand the straight edge of the tip into the gap between the plate-shaped projection and the abutting edge of the heel, to stretch the tip over the plate-shaped projection 3 and finally to press the 15 projection l into the corresponding recess in the` heel.
'I'he removal of the tip is eiected in inverse manner, that is the projection I is pulled out'of the recesspthe tip pulled ofi the plate-shaped projection 3 and out of the gap between the pro jection 3 and abutting edge of the heel.
-As can .be seen from Fig. 5, especially the right half thereof, the bottom surfaceof the cut away portion of the edge of the heel body for accommodating the tip, if this is made of elastic material, slopes downwards towards the middle of the heel as shown. at d. The lower edge of the tip is correspondingly bevelled. Thus, the tip is pressed strongly on to the heel body `when l The xation may be'I effected by nails, locking elements or screws: The removable top lift 5 is provided on its under side with pins 6 which engage in corresponding recesses in lthe `heel body,
so that -the toplift always assumes and retains the same position. This form of construction is necessary, when the exchangeable tip ,is made of non-elastic material, lfor example metal. The tip can then be exchanged as soon as the top lift 5 has been removed. The' remaining parts are 5o constructed as above described, but with the difference that tlie two abutting surfaces, one on the edge oi' the heel body and the other on the tip, are at right angles.
I claim: '55
1. A heel with exchangeable tip, comprising in combination a heel body having a recessed portion at its rear end, a straight undercut edge` bordering said recessed portion, a projection at the bottom of said recessed portion having a straight edge opposite said straight bevelled edge and forming therewith a continuous groove, the tip having in its under side a recess corresponding to the shape of said projection bordered by an edge conforming to the cross-sectional shape oi said groove. v
2. A heel was specied in claim 1, in which the groove widens towards the bottom and the heel body has a dove-tailed recess in the rounded edge of its recessed portion at the point farthest remote from the bevelled edge, a dove-tailed projection being formed on the under side oi the mote from the beveiled edge, a dove-tailed projection being formed on the under side. oi' the tip to nt in said dove-tailed recess to anchor said tip in position on said heel body, the bottom oi said dove-tailed recess being downwardly inclined from the rounded edge towards the centre of the hee1body, and the lower surface of the dove-tailedprojection on the tip having a slope corresponding to-the incline oi the bottom of the dove-tailed recess.