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Nov. 22, 193%. P. E. WIMMENAUER 2,137,935 ANTISKID DEVICE Filed Dec. 16, 1937 2 Sheets-Sheet ‘ 1 Invenim Paw/E 1475mm end/we,’ Bypémwmy. X1 iiorneys Nov. 22, 1938. P. E. WIMMENAUER 2,137,935 ANTISKID DEVICE Filed Dec. 16, 1937 2 Sheets-Sheet 2 2"" A9 do . ‘ Inventor 732w! E mmmencuoer Patented Nov. 22, 1938 ‘ 2,137,935 UNITED STATES PATENT OFFICE 2,137,935 ANTISKID DEVICE Paul E. Wimmenauer, Washington, Ind. Application December 16, 1937, Serial No. 180,253 1 Claim. My invention relates to improvements in anti skid devices for attachment to the soles of shoes to obviate slipping on icy pavements or other slippery surfaces. The invention is designed with the particular ‘ purpose in view of providing an ef?cient, durable and inexpensive attachment of the character above indicated which may be quickly and se curely attached to shoe soles and detached there 10 from, made in different sizes to ?t different sizes of shoe soles and will not mar or otherwise in jure the shoe sole to which it is attached. To the accomplishment of the above and sub ordinate objects presently appearing a preferred 15 embodiment of my invention has been illustrated in the accompanying drawings, set forth in detail in the succeeding description, and de?ned in the claim appended hereto. In said drawings:— 20 Figure 1 is a view in side elevation of a shoe equipped with my improved anti-skid device, Figure 2 is a view in bottom plan, Figure 3 is a View in perspective of one of the calks, 25 Figure 4 is a view in top plan of the device de tached, ‘ Figure 5 is a view of the stud for the coupling shown in perspective, Figure 6 is a similar view of the bracket for 30 connecting the coupling to the auxiliary sole, and Figure 7 is a view in perspective of one of the toe clips. Referring to the drawings by numerals, the anti-skid device of my invention comprises an 35 auxiliary half-sole I for attachment to the bot tom of a shoe sole and which may be made of any suitable material such as composition rubber, leather, or the like, in the different contours and sizes of the soles of different sizes of shoes to ?t 40 flush thereagainst. The auxiliary sole is pro 4 vided with a plurality of stud-like calks 2 ex tending from the bottom thereof and arranged preferably in transversely extending rows in any desired spacing in each row suitable to prevent slipping. The calks 2 are a particular feature of my invention. Each calk 2 comprises a tubular longitudinally split shank 3 extending through brazed to the head of a cut-off nail forming the flange 4 and spur 5. The auxiliary sole I is detachably secured to the sole ‘I of a shoe as follows. A pair of toe clips 8 of resilient ?at metal are secured to the 5 top of the auxiliary sole I, as by copper rivets 9, to extend forwardly from the toe III thereof upon opposite sides of the longitudinal center of said sole I, said clips 8 having hooked front ends 8' adapted to take rearwardly over and grip the toe 10 part of the shoe sole ‘I upon opposite sides of said toe part. At the rear edge III’ of the auxiliary sole I, which is made straight, is a tubular brack et I I secured along said edge ID’ by means of cars I2 extending from the same adjacent opposite 15 ends thereof, respectively, and riveted, as at III, to the top of said sole I. Extending from the bracket II is a bail-like coupling I4 of resilient wire and bellows-like form having at one end thereof opposed terminal legs I5 journalled in 20 opposite ends of the bracket I I, zigzag sides I6, and a loop I‘! at its opposite end. The coupling I4, as will berunderstood, is adapted to lie flat in the instep part of the shoe and to be connected thereto in a tensioned condition to pull the clips 25 8 tight and anchor the device in ?xed position. For connecting the coupling I4, a headed stud I8 is secured to the instep part of the shoe sole ‘I, said stud I8 having a base plate I9 nailed, as at 20, to said shoe sole ‘I. 30 As will now be seen the described coupling I4 exerts a tension against the auxiliary sole I rear wardly and su?icient to retain the clips 8 in position and together with said clips secure the aux iliary sole in position while at the same time by 35 pulling rearwardly on the coupling I4 the latter may be detached from the studs I8 and the device quickly removed by pushing forward to detach the clips 8. The foregoing will, it is believed, suffice to im- 40 part a clear understanding of the invention without further explanation. Manifestly the invention as described is suscep tible of modi?cation without departing from the inventive concept and right is herein reserved to 45 all such modi?cations falling within the scope of the subjoined claim. ' I over a burr 6 indicated in dotted line in Figure What I claim is: An anti-skid device for attachment to the sole of a shoe comprising an auxiliary half-sole hav- 50 ing calks extending from the bottom thereof, a pair of toe clips secured to the toe part of said auxiliary sole to extend therefrom upon opposite 4. Preferably the described calk 2 is formed by 65 a split copper rivet comprising the shank 3 hooked front ends adapted to take over the 56 the auxiliary sole I, a circular ?ange 4 abutting 50 the bottom of the sole I and a ground engaging solid cylindrical spur 5. The shank 3 is riveted in the usual manner on the upper side of the sole sides of said toe part, respectively, and having 2‘ ‘ " 2,137,935 toe part of the shoe sole, and means to couple the rear edge of said auxiliary sole to the instep part of the shoe sole, said means exerting a ten sion rearwardly on said auxiliary sole and com 5 prising a stud secured to said instep part, and a bail-like coupling of resilient wire and bellows form pivoted to the rear edge of said auxiliary sole and hooking over said stud, said coupling 1y ing ?at in said instep part to function as an anti skid device therein. PAUL E. W'IMIVIENAUER.