US1994013A - Interchangeable heel - Google Patents

Description

March 12,1935.

E. CHRISTENSEN 1,994,013

INTERCHANGEABLE HEEL Filed Oct. 25, 1953" Fig. 1

av WQ j HTTORNEY [NYE/V701? EM/L CHIP/Sif/VSE/V Patented Mar. 12, 1935' UN D PATENT, oFrrcE 2 Claims.

5 metal fastening on the wearing surface thereof, J

since such protruding metal surfaces areprone to scratch floors and the like. Another object I of my invention is to provide a heel of the character indicated that may be readily replaced such replacement. The thirdobject of my invention is to provide a heel that is interchangeable between the right and left shoe of a pair, and

equalized by changing from one shoe to another, of a pair, aftersome wear has taken place. A further object of my invention is to provide a heel of the character described in which the wearing portion at the extreme rear of the heel is substantially thicker than the balance of the heel to provide for the excess wear commonly found at this point. These and other objects that will be apparent from the following specification constitute the purpose of my present invention.

To accomplish these purposes, I make my new interchangeable heel in two pieces, one of which is permanently attached to the sole of a shoe in the proper place and which may be conveniently referred to as the. anchor. The other is arranged to lock firmly to the anchor and will be hereinafter referred to as the heel. My invention is illustrated'in' the accompanying drawing, in-which,--

Fig. I is a plan view of the anchor; V Fig. II is a longitudinal sectionof Fig. I on the line II-II;

. Fig. III is a cross-section of Fig. I on the line IIIIII;

Fig. IV is a plan view of .Fig. VI showing the heel;

Fig. V is an elevation of Fig. IV in projection;

and

Fig. VI shows a portion of a shoe in dotted outline, with both the anchor of the heel in place thereon, shown in longitudinal section in full lines, and, in dotted outline, an indication of how the heel is attached to the anchor. The anchor will be designated by'the mime-m1 8 and the heel by the numeral 9. They areboth preferably manufactured from moulded vulcanvulcanized somewhat harder than the heel, the

without the employment of a skilled artisan for therefore provides that the wear," ordinarily un,-' equal at the extreme rear of the heel, may be.

difference in quality being indicated by the difference in the section lines shown in the draw- The anchor is provided with an internally threaded opening, 10, and the heel is provided 5 with an externally threaded projection, 11. These are so proportioned and designed that when the heel is applied reversely to the anchor, that is with the rear end forward, the two threaded portions, 10 and 11, will engage and. a half turn of the heel with respect to the anchor will bring the two parts together as .shown in Fig. VI, the rear'end' being sprung outwardly, permitted by its resilient, qualities, as shown at 8a, and when the thread is completely home, the rear end portion represented by 8a will be released and will spring straight, as shown in Fig. V, and interlock with the anchor to prevent movement relative thereto unless it is purposely accomplished by springing the portion So back again to the position shown in Fig. VI, when it can be removed by reversingthe operation described for attaching it. The anchor 8 is provided with an offset upwardly stepped portion 12 and the. heel, 9, is provided with a correspondingly shaped upward projecting portion 81) to engage therewith and an interlocking lug 13 on the anchor engages witha recess, 14, moulded in the heel.

I do not wish to limit myself to the threaded means as shown for attaching the two partstogether since a bayonet joint or an. interrupted thread may be substituted, though I prefer the construction as shown. Also different forms of the locking device here represented by 13 and 14 may be substituted. 35

To use, the anchor will'be firmly, attached to the shoe by fastenings such as diagrammatically indicated at 14', passing through holes such as 15 moulded in the anchor, and this part may be considered permanent as long as the shoe lasts.

From time to time, as the heels wear, they may be quickly and easily renewed without the use of any tool and/0r they may be interchanged from right to left if the wear, as is customary, wears off the outside rear portion of the heel. By so changing them, an increase in lasting qualities will be apparent. 7

It is a well known fact that the rubber heel of commerce is described as worn out when say of its original structure is as good as new. With my new interchangeable heel the wearing portion, and substantially that only, is affected by wear and it can be removed and replacedwithout the employment of a skilled artisan in a few seconds of time to completely renew the wearing surface of the heel.

Having thus fully disclosed my invention so that those familiar with the art to which it appertains can make and use it, what I claim as new and desire to secure by Letters Patent is:

1. In an interchangeable heel device for footwear, an anchor portion adapted to be permanently attached to a shoe, an internally threaded opening centrally disposed therein, an upwardly stepped portion rearwardly of the said opening, a lug extending partly across said stepped portion and a matching removable wearing surface of resilient material that is adapted to be screwed into and out of the recess and resiliently sprung over and locked with said lug and said upwardly stepped portion.

2. A two-piece interchangeable heel for footwear comprising in combination an anchor portion adapted to be permanently attached to a shoe, a centrally disposed threaded opening in said anchor portion, an upwardly offset surface rearwardly of said opening, a locking lug extending partly across said ofiset surface and a removable wearing portion provided with matching surfaces that is adapted to screw into said recess and spring to locking position over the said ofiset.

EMIL CHRISTENSEN.

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