US2059211A - Antiskid device - Google Patents

Description

Nov. 3, 1936- LE ROY DICK Y 2,059,211

v ANTISKID DEVICE Filed Dec. s, 1953 till } weight Patented vNov. 3 1936 PATENT orrlcs ANTISKID DEVICE Le Roy 1. Dick, Cleveland, Ohio, asslgnor to The Cleveland Chain & Manufacturing Company, Garfield Heights, Ohio, a. corporation o1! 0M0 Appflcation December 6, 1933, Serial No. ithlll .11 Claims.

This invention, as indicated, relates to an antiskid device of the type generally known as an emergency tire chain. More particularly, it comprises a device adapted to be placed upon an automobile tire with anti-skid members extending over the tread thereof and. securing means extending over the ielloe of the wheel and firmly holding the anti-skid device in place.

v Devices of this character have heretofore bee produced, but at times have been found to be subject to displacement due to the centrifugal force exerted on a heavier portion of the device so as to move such heavier portion outwardly and disturb the original adjustment of the antiskid device relatively to the tread. In some instances, it has been sought to avoid the effects of centrifugal force upon a device of this character by making the clamp and buckle of nearly the same weight, whereby centrifugal force will not tend to advance either of them outwardly on the wheel to any materiel extent. There are disadvantages in attempting to make the buckle or means for fastening the free end of the strap to the supporting plate for the anti-skid device of equal weight to the clamping or fixed end of the strap for supporting the structure, inasmuch as the buckle involves more mechanical parts and these would have to be reduced beyond the limits of safety to make them of equal weight with the other end of the device, orthe other end would have to be unduly thickened to bring the weight up to the desired weight of the buckle structure.

e present invention has in view therefore the idea oi so securing the device to the tire that the some will be irlctionally held and will resist all edorts oi centrifugal force to dislodge the same irrespective oi the fact that the buckle portion oi' the device may be oi considerably greater than that of the clamping cud; of the del permits manufacturing of the device vice.

to he ried on in the normal mannerwherein hired end oi the strap or of making the clampim portion oi the device at the-hired end of the strap extra heavy to approximate the weight of the huchle. Each oi. these parts may he made of any tion.

(Cl. 152--M) required design to fulfil the proper mechanical functions of the same and involve no alterations or increase or diminution of the parts for the purpose of properly centering the device upon the tire and maintaining it there.

The principal object of the present invention is to provide an anti-skid device of the type known as an emergency chain and having structural characteristics which tend to prevent sideslip thereof when applied to the tire.

Another object of the invention is to provide an anti-skid device for tires adapted to fit smoothly against the outer surface oi the tire and adjacent parts and at the some time to frictionally engage the tire at points below the point of greatest transverse diameter in such manner as to prevent displacement or the device from its original position of adjustment.

Another object of the invention is to provide an anti-skid device having an improved type of strap securing and fastening means whereby easy engagement oi the strap with the tire and wheel may be had and secure locking of the same may be obtained without injury to the long life of the structure.

Another object of the invention is to provide a device of the racter set iorth which will be adapted for quantity production and at the same time provide structural features which are superior to those of this type generally available to the public and which will remain free of mechanical dimculty irrespective oi the length oi time during which they may he inuse.

Another object oi the invention is to provide an improved securing device for an emergency the chain which by its structure will have a double locking effect through the movement of one of the parts past dead center and yet adept-' ed for release without unusual efiort. 7

Another object of the-invention is to provide means for securing an anti clsid device to a wheel in such manner that the greater the pull upon the device, the greater the gripping eilect upon the free end of thesecuriug member as well as the increase oi snuhhing action adapted for re rusting strains of the greatest magnitude.

Qther and ituther objects of the invention will appear in the course of the ioilowing: dose-rip To the accomplishment oi foregoing and related ends, said invention, then, consists oi the means herelnai'ter fully desorihed and lliftltitlih larly pointed out in the claims, the annexed draw ing and the following description setting iorth iu detail certain structures hodylng the inveutiou such disclosed means constituting, however, but one of various structural forms in which the principle of the invention may be used.

. In said annexed drawing:

Figure 1 is a view, partly in elevation and partly in section, showing an anti-skid device embodying the principles of the invention, as seen in elevation placed over a tire seen partly in section;

Figure 2 is a side elevation of the structure shown in Figure l, as viewed from the plane indicated by the line 2--2, seen in Figure 1, and showing the fixed end of the securing strap;

Figure 3 is a view similar to Figure 2, as viewed from a plane indicated by the line 33, shown in Figure 1, showing the free end of the securing strap and the clamping device therefor;

Figure 4 is an enlarged fragmentary view, partly in section, taken along the line 4-4, shown in Figure 2, looking in the direction of the arrows, and showing the details of securing the fixed end of the strap;

Figure 5 is an enlarged fragmentary view, partly in section, taken along the line 5-5, shown in Figure 3, looking in the direction of the arrows, and showing the free end of the strap and the clamping device therefor; and

Figure 6 is a view similar to Figure 3, but showing a modified form of supporting plate embodying the principles of the invention.

As' will clearly appear from Figures 1 to 3 of the drawing, the anti-skid device I is applied about the outer portion of a tire 2 with a securing member in the form of a strap 3 engaged beneath the wheel rim and felloe 4 intermediate the spokes 5. The anti-skid device may take various forms, but preferably comprises a pair of plates 6, 1, having apertures 8 adjacent the ends thereof through which are engaged the terminal links 9 of respective pairs of cross chains H. In each of the plates the inner upper margin of the plate adjacent the apertures 8 is struck upwardly to provide a securing loop or eye l2 over \vhich'the inwardly bent ends 13 of the terminal links 9 are engaged in a manner to have free pivotal movement and be held out of direct contact with the adjacent side wall of the tire.

Each of the plates is made of a length to space the cross chains a suitable distance apart over the tire tread, which may be any desired distance, but, as shown, is approximately four inches between centers of the cross chain when at the central point of the upstanding loops.

The plates, as has been indicated, are intended to'bear against the side walls of the tire on opposite sides thereof at a point beneath the point of greatest transverse diameter of the tire so as to have extended area of frictional contact with said side walls over substantially the entire inner area of the main body portion of such plates. This frictional effect is enhanced by offsetting the loops for the terminal links of the cross chains in an outward direction and is further assisted by displacing the bearing member H for the fixed end of the strap outwardly. This bearing memher is formed by striking in an outward direction a section of metal l5 from the central body portion of the plate, leaving an aperture I 6 centrally of the plate, and striking a like section of metal I! outwardly from the outer edge of the plate, such section of metal I! preferably being in the form of an extension at the lower edge of the plate so as to leave the body of the plate of approximately uniform contour at its lower edge. The displaced portions of the plate which form the bearing member thus are of somewhat tubu 19. or like fastening devices.

that as the latch frame 26 is moved away from the lar form so as to provide a substantially cylindrical bearing member for the inner end of the strap, one end of which is engaged through the aperture to form a loop l8 around the substantially tubular bearing member M. The end of the strap 3 just referred to is secured to the body portion thereof adjacent the bearing member by means of rivets Thus the inner face of the plate 6 will be wholly free of projections of the parts attached thereto comprising the terminal links 9 and the strap loop i8, and the inner face may bear in direct frictional contact with the adjacent wall of the tire below the point of greatest transverse diameter of the tire.

The plate 1 for engaging the opposite ends of the cross chains l l is provided with loops 2| outwardly offset in the same manner as the loops l2, and said loops are engaged by the inwardly turned ends l3 of the terminal links 9 in like manner. The lower portion of-the plate 1 is formed with a central extension 22 in the plane of the main body portion of said plate, but with lateral extensions 23, which are bent upwardly on the outer face of the structure so as to form side members of a channel of which the extension 22 is the bottom. Each of the side members is formed adjacent the inner portions thereof with apertures to provide bearings for a pin or bar 25 to the projecting ends of which a latch frame 26 of U-shaped formation is engaged through apertures formed in the free ends of such latch frame and the upsetting of the ends of the pin 'or bar 25 is outwardly of said terminal members in the latch frame. The latch frame is movable pivotally about the pin 25 and is provided in its side members at a point slightly above the upper margins of the side plates 23, 24, with apertures within which are engaged pivot extensions 21, 28, formed at the lower outer edge of a slidable clamping member 29 which is of inverted U-shape and of a width to have free movement between the side plates 23, 24. The opposite lower edge of the U-shaped clamping member 29 is provided with outwardly extended bearing members 3|, 32, which are engaged through slots 33, 34, which slots are formed through the side plates 23, 24, centrally of the portions thereof beyond the position of the pin or bar 25, said slots inclining downwardly from a position adjacent the upper edge of the side plates to a position slightly below the position of the apertures for the pin The slots are preferably made of a length so plate I, it may be swung through an arc of slightly more than 90 before the bearing pins 3!, 32 reach the outer ends of the inclined slots 33, 34.

The latch mechanism just described serves to securely hold the free end of the strap after the cross chains have been placed over the tread of the tire and the strap has been engaged beneath the felly of the wheel between the spokes thereof. The method of attaching the free end of the strap to the securing device is to insert the free end of the trap in the channel provided by the extension plate 22 intermediate the side plates 23, 24, and beneath the pin or bar 25. and then turn. the free end'of the strap so as to form a loop about said pin 25 and beneath the clamping plate 29, the rearward edge of which provides adequate space to slidingly receive the free end of the strap as it is drawn outwardly over the body portion of the strap. The free end of the strap may be pulled to firmly draw the entire structure into tight engagement with the tire and adjacent wheel structure, and when firmly seated in posimental areas thereof over substantially the full body portion of said plates inwardly of the point of greatest transverse diameter of the tire, a strap connected with one of the plates at the central inner portion thereof, a fastening element for the free end of said strap provided centrally of the inner portion of the other of said plates, and cross chains connected with the ends of said respective plates, all of the connections with said respective plates being offset outwardly of the plane of the inner faces of said respective plates and out of contact with the adjacent tire walls.

6. An anti-skid device having in combination a pair of stamped metal plates adapted to be positioned substantially parallel to each other on the opposite outer side walls of a tire with theirtop edges in direct frictional contact with said tire walls inwardly of the point of greatest transverse diameter of the tire, a strap connected with one of'the plates at the central inner portion thereof, a fastening element for the free end of said strap provided centrally of the inner portion of the other of said plates, and cross chains connected with the ends of said respective plates, said last-named connections with said respective plates being offset outwardly of the plane of the inner faces of said respective plates and out of contact with the adjacent tire walls.

'7. An anti-skid device having in combination a pair of stamped metal plates of arcuate shape adapted to be positioned substantially parallel to each other on the opposite outer side walls of a tire with their top edges in direct frictional contact with said tire walls inwardly of the point of greatest transverse diameter of the tire, a strap connected with one of the plates at the central inner portion thereof, a fastening element for the free end of said strap provided centrally of the inner portion of the other of said plates, and cross chains connected-with the ends of said respective plates, said last-named connections with said respective plates being offset outwardly of the plane of the inner faces of said respective plates and outof contact with the adjacent tire walls.

8. An anti-skid device having in'combination apair of stamped metal plates adapted to be I positioned on opposite sides of a tire below the point of greatest transverse diameter with their inner faces with portions thereof in direct frictional engagement with the tire walls, anti-skid means engaged with outwardly offset elements on said plates and connecting each of said plates over the tread portion of the tire, and detachable securing means connecting said plates beneath said tire.

9. An anti-skid device comprising two long, flat, parallel plates, two chains extending between corresponding ends of the plates, each plate having at its inner edge two upwardly bowed bar elements one of which is located near each end, the main portions of said bar elements lying a considerable distance above the plane of the top of the plate to bring the under sides thereof considerably farther away from the plane of the bottom face of the plate than the thickness of the plate, hook devices on said chains passing underneath said barelements and across the tops thereof, whereby no part of the fastenings between the chains and the plates projects below the planes of the bottom faces of the plates, each plate having a third bar element at about the middle of its long outer edge, and a tie member adapted to extend under the rim of a wheel attached to the last-mentioned bar elements; the construction being such that the plates form inward projections on the structure encircling a wheel rim and tire.

10. A side plate for an anti-skid device providing a support for the respective ends of a pair of cross chains extending over a tire tread and supported at their opposite ends by another support, comprising a long, fiat, plate having at its inner edge two upwardly bowed bar elements one of which is located near each end, the maln portions of said bar elements lying a considerable distance above the plane of the top of the plate to bring the undersides thereof considerably farther away from the plane of the bottom face of the plate than the thickness of the plate to permit hook devices on the chains to pass underneath said bar elements and across the tops thereof, whereby no part of the fastenings between the chains and the plate projects below the plane of the bottom face of the plate, said plate having a third upwardly bowed bar element at about the middle of its long outer edge, and a tie member adapted to extend under the rim of a wheel attached to the last mentioned bar element; the construction being such that the plate forms inward projections on the structure encircling a wheel rim and tire.

11. A side plate for emergency chain constructions comprising an elongated flat metal plate of generally arcuate shape conforming to the wheel rim curvature as seen from above, with portions displaced from the plane of the body of said plate as seen from the side edges, to provide attaching means for cross chains, and connecting elements attached to said displaced portions outwardly of the tire for securing the associated parts to a wheel.

LE ROY I. DICK.

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