Патент USA US2112183код для вставки
March 22, 1938-‘ B. ULLEVQLDSAETER 2,112,183 SKI Filed Sept. 22, 1936 J; M/Ag-m hkagg'” I //v wen/210V’ Patented Mar. 22, 1938' 2,112,183 UNITED ‘STATES PATENT OFFICE 2,112,183 SKI Bjorn Ullevoldsaeter, Nittedal, Norway Application September 22, 1936, Serial No. 102,012 In Norway October 21, 1935 5 Claims. (Cl. 280-28) Skis are previously known- made up of a single layer which consists of rails glued together in the lateral direction of the ski. However, in or der to realize a reliable interconnection between the rails, the same must be secured in relation to each other by means of through-going mechani cal securing means, in addition to the glue or cement made use of. Further, skis are known, which are made up 10 of two layers, viz. a top layer consisting of rails glued together in the lateral direction of the ski and a solid bottom layer‘ or sole connected to the top layer and the rails. thereof. Skis of this type have, however, the drawback 15 that when the edges of the running face of the X 20 such plates will have a relatively short length. due to the fact that the ski shall have a thick- \ ness which decreases from the middle part of the ski towards the ends thereof, and since the said plates are so short, they will not be able to im part any warping to the bottom layer. Finally, if desired, all the layers of the ski may consist of rails glued together in the lateral direction of the ski, so that no solid, uninterrupted layer occurs, which extends through the entire width of the 1-4 0 ski, thus all tensions are eliminated which might cause warping. ’ The invention is by way of example illustrated in the annexed drawing in which: ' 1 shows a cross section of a ski accord skis have become worn, the skis must either be ‘ingFigure to the invention, condemned or the entire bottom layer or sole must Figure 2 shows a similar section of a modi?ed be renewed, which demands time and costs, since embodiment, ‘ a common planing of the running face of the Figure 3 is a still further sectional vlewillus ski is not possible in practice in view of the rel ative thinness of the sole. It is also di?icult to trating another modi?cation of the invention. provide the ski with such edge protectors as are now common since the securing screws for such protectors would have to be screwed either into the dividing line between the two layers or into the top layer, which is made of lighter and softer material, and thus would not be reliably secured. Further the bottom or sole layer, which is a layer extending over the entire width and length 30 of the ski, has a tendency to warp and thereby to act upon the top layer, so that the entire ski becomes warped. It is the object of the present invention to pro; vide a ski in which said drawbacks are eliminated, and a chief feature of the invention resides there in, that the ski is made up of a bottom layer consisting of rails which are glued together in the lateral direction of the ski and having secured thereon one or more layers. In this arrangement the bottom layer may be given such a thickness that it is possible, when As illustrated in the drawing the bottom layer is composed of rails-I glued together in the lat- _ eral direction of the ski, and the runnning face formed is provided with one or more steering grooves 2, as usual. The rails‘ I may have any suitable cross sectional shape and may be of equal or di?erent widths. The two outer rails 25' I’, or the lower portions thereof, may be formed from a wear resisting material, so that they con stitute edge protectors forming integral parts of 30 the ski construction proper and thus are reliably secured. The outer rail I’ may, at its lower part, be provided with an extension or ?ange l", which extends into the adjacent rail, as illustrated to the right in Figure 1, in order to increase the security. 3 designates the top layer, which serves to strengthen the interconnection between the rails of the bottom layer and simultaneously forms, at least partially, the top of the ski. As illustrated in Figure 2 the ski may consist of two layers which are each composed of rails . the edges of the running face have become worn, _ glued together in the lateral direction of the ski. repeatedly to plane said face in usual manner, The rails 3' of the top layer, which serves as con- ' and further it is possible to provide the side parts necting layer, are then so shaped and the layers of the ski, if desired, with edge protectors, the 45 securing screws of which are screwed into solid, are so arranged in relation to each other, that hard material. Still further it is possible to make the division lines between the'rails 3' of the top layer are not in alignment with the division lines the outermost rails of the bottom layer, or the between the rails l of the bottom layer. lowest portions thereof, from a wear resisting In skis constructed in this manner no solid 50 material so that the‘ edge protectorsbecome in tegral parts of the ski proper, whereby the se curing of said edges is relatively easy and fully reliable. _ v If the interconnecting layers are provided with 55 plates extending over the entire width of the ski, layer occurs, which extends over the entire width of the ski, and which could cause warping of the ski, and at the same time the rails of the two layers are reliably interconnected. As will be understood the ski may also be made up of more than two layers. Thus, as illustrated 2,112,183 2 in Figure 3, a third layer 4, is placed over the layer 3 and the layer 4 may be solid or may also be composed of rails glued together in the lateral direction of the ski. I claim: ' 1. A ski having a bottom layer of appreciable outer rails of the bottom layer consist of a wear resisting material. 4. A ski according to claim 1, in which the thickness consisting of rails glued together in the lower parts of the outer rails of the bottom layer lateral direction of the ski and at least one top 5.‘ Aski comprising two superposed layers com posed of rails glued together in the lateral di rection of the ski, and a third solid layer secured layer. 10 ment with the division lines between the rails of the top layer. 3. A ski according to claim 1, in which the 2. A ski having a bottom layer of appreciable thickness consisting of rails glued together in the lateral direction of the ski and a top layer con sisting of rails glued together in the lateral di rection, the two layers being so situated in rela 15 tion to each other, that the division lines be tween the rails of bottom layer are not in align consist of a wear resisting material. . to the top of the uppermost one of said two su perposed layers, one of said superposed layers providing a bottom for the ski and having ap preciable thickness. BJQRN ULIEVOIDSAE'I'ER.