Патент USA US2283264код для вставки
May 19, 1942- D. s. KENNEDY ' 2,283,264 'NONSKID DEVICE _ Filed Jan. 25, 1941 I 2 Sheets-éheet 1 May 19, 1942. D_ $_ KENNEDY 2,283,264 NONSKID DEVICE Filed Jan. 25, 1.941 _ I ' 2 Sheets-Sheet 2 Patented May 19, 1942 2,283,264. UNlTED STATES PATENT OFFICE .NONSKID DEVICE Donald Stuart Kennedy, Longparish, Andover, England ' ~ Application January 25, 1941, Serial No. 376,002 In Great Britain January 24, 1940 5 Claims. This invention relates to overall chains or gir~ dles for use upon the tires of road vehicle wheels. It relates more particularly to that kind of over all chain or girdle which is composed of a series (Cl. 152-225) . of spaced-apart non-skid shoes connected by lat eral retaining chains or other linking means. The present invention has for its objects the provision of anon-skid shoe which is self-clean ing; which is effective on snow or ice-covered surfaces: which will not become clogged or caked with mud: which is robust in construction and long Wearing: and which is adapted to open out ?at and therefore pack flat for transport when not in use. . The principal feature of the improved non skid shoe of the present invention is that the tread member formed of rigid twisted metal rib bon with flat tab-pieces at its ends, and having side flaps hingedly connected with the ends of said ribbon, is provided between each side flap 1 and the ?at tab piece, with a hinge connection which includes a short inverted channel section member having its central web secured to said tab piece and its side walls apertured to form bearing supports for the hinge pin of the side '25 flap. The invention is hereafter described with ref erence to the annexed drawings, in which: Fig. 1 is a front elevation of one form of the shoe, the ?at tab-piece being shown riveted to the under side of the web of the short channel section piece. Fig. 2 is a plan view of part of Fig. 1 and Fig. 3 is an end view of Fig. 1. Fig. 4 is a front elevation of another form of side) of the web d of the channel section piece or member. The flanges or walls d1 of the chan nel section piece are apertured to provide bear ings for the hinge-pin e, the latter being shown _ in the 'form of a bolt with nut e1. The web d is parallel to the axis of the hinge pin e and the walls dldl are preferably rounded off adjacent to the side ?aps 1‘. These side ?aps ff are of the known kind and are secured upon said hinge pin c with the nar- , rowedportion f1 of the ?ap positioned between the inner faces of the flanges d1 so as to be mov able about the hinge pin e. A portion of the pneumatic tire T is shown in chain lines in Fig. 1. These ?at tab-pieces‘bb are aligned with one another in axial prolongation of the helical twisted member a and are shown projecting slightly beyond the channel section piece; they are parallel or substantially parallel with the axis of the hinge pin e. The hinge connection between each side ?ap f and the twisted bar a is thus eifected by a short inverted channel section member having its cen tral web 11 secured to the flat tab-piece b and its side-walls dldl apertured to form bearing sup ports for the hinge pin 6. The shoe is provided with means for limiting the inwards movement of the side ?aps ff and in the form illustrated, I employ stop pieces hh for that purpose. The stop piece It is shown con-' sisting of a ?at member h with cranked ends or lugs hlhl apertured to ?t the hinge pin 6, this stop piece extending along the internal angle between the twisted element a. and the flap 1‘. the shoe, the ?at tab-pieces being made integral 35 The edges of the member 71. can engage against with the channel section pieces. Fig. 5 is a plan the helical bar a and side flap f, and thus stop view of the tread portion before it is ?nally any inwards movement of the hinged side flap f. shaped and Fig. 6 is an end view of Fig. 4. Fig. 7 The shoe is also shown provided with lateral is a sectional elevation of the bushings employed retaining chains ii of the known kind, the end in this form of side ?ap, Fig. 8 being an elevation 40 links being secured in the loops F? of the hinged of said side ?ap and Fig. 9 a cross section of said ?ap, showing its hinged attachment to the chan nel section piece. ?aps ff. This improved construction of overall shoe is more especially advantageous when used on a Fig. 10 is an end view showing another form of channel section piece. Figs. 11 and 12 are 45 wheel travelling upon snow or ice and it is equally good when the wheel has to pass over mud or end views showing two forms of built-up channel soft ground. It is to a great extent self-cleaning section pieces. Fig. 13 is a perspective view of in use and when not in use it opens out or packs a stop piece to limit the inwards movement of the side flaps. flat for transport. The side ?ap f at the right In the arrangement of Figs. 1, 2 and 3, the 50 hand of Fig. 1 in chain lines indicates the packed ?at position. . transverse tread portion consists of a metal rib bon a rigid throughout its length and having a It is to be noted that the tread portion is a plurality of twists to form a helical member, and twisted metal ribbon a and that its ?at tab extremital ?at tab-pieces bb which are shown pieces bb at the end of the said twisted member secured by rivets ccc to the under side (inner 55 are each substantially parallel with the axis of 2 2,283,264 the hinge pin e carried by the short channel sec tion piece. As compared with the shoe described in my prior Patent No. 2,095,523, I now employ a single twisted metal ribbon or element a, the ends of which are not traversed by the hinge pins but are formed as tab-pieces bb substantially parallel to said pins and each secured to the web 11 of ?ap f I employ in this arrangement not a stop piece h but a shoulder f4 formed on the side ?ap 1‘ adapted to engage the cam-like edge (14 of the downturned flange d3; see Fig. 41. Instead of forming the channel section piece with a web d and two side ?anges d1, it may be crenated at the corners as shown in Fig. 10 to enable the flanges dldl to be separated further > and to permit the use of a longer hinge pin e. the channel-section piece which also provides in its ?anges dldl the bearings for the hinge pin. 10 In the arrangements of Figs. 11 and 12, the channel section member ddldl is strengthened The single twisted member is self-cleaning and does not become packed or bridged by snow in wintry conditions. The ?at tab-pieces bb upon the twisted metal. element a, in conjunction with the channel sec tion pieces to the middle portion or web d of which the tab pieces are secured, and the mount ing of the hinge pins e in the ?anges or side walls d1 of said channel-section member, pro-g vide a robust and effective construction capable of withstanding hard wear and well suited to the purposes in view. . or reinforced by an outer channel section mem ber having a web Z and sloping or cranked walls Z111, the web I being juxtaposed on web at and both being riveted together. The walls 11 a?ord additional bearings for the hinge pin e. There . are no bushings employed in these arrangements ' - but a longer bearing for hinge pin 6 is provided. The lugs or sides hlhl of the stop piece are shown outside the outer channel section member 111. In Figs. l0, l1 and 12, an extra metal wear ing piece g is shown securedby the rivets cc to the web of the channel section member. Fig. 11 also shows a T-shaped member mml, The axis of the hinge pin 6 is preierably'in line with the inner edge of each spiral of the twisted member'and the ?anges (11d1 are rounded 25 with its. head m below the tab-piece b and se cured thereto by the rivets cc, the stem m1 ex off at the end remote from the web (1, concen tending into a recess or slot in the side ?ap and trically with the axis of the hinge pin 6. providing an additional bearing for the hinge The spirals of the twisted member are con pin c. tinued up to the channel section piece and it is Having thus described my invention, I claim: to be noted that when in use and the twisted 1. A non-skid shoe for an voverall chain and ribbon or member a is making contact with the of the kind comprising a transverse tread por ground, its respective ends or tab-pieces are in tion with side ?aps and hinge pins connecting the form shown in Figs. 1, 2 and 3 protected from said ?aps to the ends of said tread portion, said the ground by the webs d of the channel section flaps having limited inwards movement, in which pieces and are thus not directly exposed to the ground. ' ' Instead of form-ing the channel section pieces separate from the tab-pieces, they may be made integral, as illustrated in Figs. 4, 5 and 6. The construction there illustrated shows the tread member a provided with integral ends or tab pieces I)’ which include a ?at, central portion (12 and laterally extending portions d3d3, these por tions corresponding generally in shape and func tion to the Web (1 and ?anges d'd’, respectively, of that form of the present invention shown in Figs. 1 to 3 inclusive; it also shows a tread plate projection 9' as a continuation of the flat, cen the said tread portion is formed as a metal bar having a plurality of twists in its length and ?at tab pieces at its ends, said tab pieces being aligned with one another, inverted channel sec tion pieces to the middle members of which the said tab pieces are secured being apertured in their Walls to receive said hinge-pins, and the middle member of each channel section piece being parallel to the axis of the respective hinge pin. . 2. A shoe for a non-skid device of the char acter described, comprising a tread member formed of a straight metal ribbon having a plu rality of twists in its length, ?at tab pieces at tral portion d2 of the tab-piece b’, said projec tion 7‘ having, if desired, lugs 7'1. When‘ ?nally 50 the ends of said ribbon, channel section mem bers covering said tab pieces, the web of each shaped from the form in Fig. 5 to that in Fig. 4, channel section being riveted to the respective the ?anges (Z3013 are bent down at right angles tab piece, detachable parallel hinge pins extend to the ?at, central portion 012 of the tab-piece b’, ing in parallel relation through the ?anges of and the tread plate projection is turned in the opposite direction to the ?anges d3d3 to extend 55 said channel section members, and side ?aps hingedly mounted on said hinge pins, said tab partly over the ?at, central portion (12. This projection 7‘ is a thickening piece to reduce wear upon the side ?ap f and hinge pin 6 and it is preferably brought level at its top with the top pieces being aligned with one another upon the axis of said twisted ribbon and substantially parallel with the axes of said hinge pins. 3. A shoe for a non-skid device comprising a of the twists, as shown in Fig. ii. The lugs 7'111'1 60 tread portion formed of rigid twisted metal rib when employed would increase the width of the bon adapted to be'set across the tire tread and tread plate projection y‘, by extensions fore and having extremital ?at tab pieces, a channel sec aft of the latter. tion piece at each end of said twisted ribbon and In this form of construction, the hinged side ?ap has a wider bearing upon the hinge pin e 65 formed integrally with said tab piece and ribbon, hinge pins mounted in the side walls of said by reason of the provision of the outer pin-en gaging loops or joints f3f3 as well as the inner integral channel ' section pieces, a side ?ap hingedly mounted on each of said hinge pins, portion f1 and bushings kkl mounted on the and a tread plate projection also formed in longer hinge pin e. The side ?aps if, as clearly shown in Figs. 8 and 9, are recessed to allow the 70 tegrally with the web and tab piece at each end of the twisted ribbon, said tread plate projection ?anges or side walls d3d3 of the channel section being bent over said web and level at its outer piece to enter and the longer bushing is obvi edge with the outer edge‘ of the said twisted ously located between the ?anges 11301.3 of the metal ribbon. channel section piece. 4. A non-skid shoe including a tread member To limit the inwards movement of the hinged 2,283,264 formed of twisted metal ribbon and having ?at tab pieces at the ends of said metal ribbon, side ?aps hingedly connected with said metal ribbon and means for limiting the inwards vmovement of said side ?ap, the hinge connection between each side flap and the ?at tab piece being by means of an inverted inner channel-section 3 tread'portion formed of rigid twisted metal rib bon adapted to be set across the tire tread, a channel section member at each end of said > twisted ribbon and consisting of a central portion and cranked, apertured ends, hinge pins mounted in the ‘apertured ends of said channel section members, side flaps mounted upon said hinge pins, and flap-limiting stop vpieces mounted on said hinge pins, each of said stop pieces consist member having its central web secured to said tab piece and its side walls apertured to form bearing supports for the hinge pin oi the side 10 ing of a central portion and cranked ends aper ?ap, and an outer channel-section member hav tured to ?t the hinge pins, and the central por ing its web secured to the web of the inner chan tions of said channel section members and said stop pieces extending substantially parallel with nel-section member, with the side walls of the outer channel-section member splayed outwardly the axes of said hinge pins. and also supporting the said hinge pin. 15 5. A shoe for a non-skid device comprising a DONALD STUART KENNEDY.