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Патент USA US2112183

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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.
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