US2112183A

US2112183A - Ski

Info

Publication number: US2112183A
Application number: US102012A
Authority: US
Inventors: Ullevoldsaeter Bjorn
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-10-21
Filing date: 1936-09-22
Publication date: 1938-03-22
Anticipated expiration: 1955-03-22
Also published as: FR811565A

Description

March B. ULLEVQLDSAETER 2,112,183

SKI

Filed Sept. 22, 1936 /A -m hka I /v wen/210 Patented Mar. 22, 1938' UNITED STATES PATENT OFFICE Application September 22, 1936, Serial No. 102,012 In Norway October 21, 1935 5 Claims. (Cl. 280-28) Skis are previously knownmade up of a single layer which consists of rails glued together in the lateral direction of the ski. However, in order to realize a reliable interconnection between the rails, the same must be secured in relation to each other by means of through-going mechanical securing means, in addition to the glue or cement made use of.

Further, skis are known, which are made up 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 that when the edges of the running face of the skis have become worn, the skis must either be condemned or the entire bottom layer or sole must be renewed, which demands time and costs, since a common planing of the running face of the ski is not possible in practice in view of the relative thinness of the sole. It is also diflicult to 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 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 therein, 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 the edges of the running face have become worn, repeatedly to plane said face in usual manner, and further it is possible to provide the side parts of the ski, if desired, with edge protectors, the securing screws of which are screwed into solid, hard material. Still further it is possible to make the outermost rails of the bottom layer, or the lowest portions thereof, from a wear resisting material so that the edge protectorsbecome integral parts of the ski proper, whereby the securing of said edges is relatively easy and fully reliable. v

If the interconnecting layers are provided with plates extending over the entire width of the ski,

such plates will have a relatively short length. due to the fact that the ski shall have a thickness 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 impart 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 ski, thus all tensions are eliminated which might cause warping.

The invention is by way of example illustrated in the annexed drawing in which:

Figure 1 shows a cross section of a ski according to the invention,

Figure 2 shows a similar section of a modified embodiment,

Figure 3 is a still further sectional vlewillustrating another modification of the invention.

As illustrated in the drawing the bottom layer is composed of rails-I glued together in the lateral 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 difierent widths. The two outer rails I, or the lower portions thereof, may be formed from a wear resisting material, so that they constitute edge protectors forming integral parts of the ski construction proper and thus are reliably secured. The outer rail I may, at its lower part, be provided with an extension or flange 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 glued together in the lateral direction of the ski.

The rails 3' of the top layer, which serves as connecting layer, are then so shaped and the layers are so arranged in relation to each other, that the division lines between the'rails 3' of the top layer are not in alignment with the division lines between the rails l of the bottom layer.

In skis constructed in this manner no solid 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 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 thickness consisting of rails glued together in the lateral direction of the ski and at least one top layer.

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 consisting of rails glued together in the lateral direction, the two layers being so situated in relation to each other, that the division lines between the rails of bottom layer are not in alignment with the division lines between the rails of the top layer.

3. A ski according to claim 1, in which the outer rails of the bottom layer consist of a wear resisting material.

4. A ski according to claim 1, in which the lower parts of the outer rails of the bottom layer consist of a wear resisting material.

5. Aski comprising two superposed layers composed of rails glued together in the lateral direction of the ski, and a third solid layer secured to the top of the uppermost one of said two superposed layers, one of said superposed layers providing a bottom for the ski and having appreciable thickness.

BJQRN ULIEVOIDSAE'I'ER.