An Improved Wood Rim for Bicycles and Vehicles.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883) as allowed
by the decision of the Chief Examiner of the 6th day of July 1898.
Date of Application, 23rd July, 1896-Accepted, 12th Sept., 1896
COMPLETE SPECIFICATION (AMENDED).
An Improved Wood Rim for Bicycles and Vehicles.
We, JoN HOGG KYDD, of the Town of Bowmanville, County of Durhamı
and Province of Ontario and Dominion of Canada, Manager of the Dominion
Organ and Piano Company, Limited, in the said Town of Bowmanville, and
JOHN BERNARD MITCHEL, of the Town of Bowmanville, County of Durham.
Province of Ontario, in the Dominion of Canada, a Superintendent of the said
Dominion Organ and Piano Company, Limited, do hereby declare that the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates generally to wheel rims, and more particularly to an
improved wood rim for bicycles and vehicles employing a pneumatic or cushion
tire.
One of the objects of our invention is to provide a wheel rim composed of a
series of layers so constructed and arranged as to provide an exceedingly strong
and durable rim.
Another object is to provide a composite rim, which can withstand a great
strain, either longitudinal, or transverse, or both, without splitting.
And another object is to provide a wheel rim, which shall combine the qualities
of strength, elasticity, neatness and durability.
With these various objects in view our invention consists broadly in constructing
a wheel rim of five layers, the inner, outer and central layers having the grain
longitudinal, while the intermediate layers have the grain transverse or
crosswise.
The invention consists also in making the outer layer thicker than the inner
one, whereby strength and elasticity are secured, and the intermediate layers
thinner than the central layer, said central layer being thinner than inner one.
In the drawings hereto annexed and forming part of this specification-
Fig. 1. is a side elevation of a wheel rim embodying our invention.
Fig. 2. is a sectional view of rin constructed in accordance with our invention.
Fig. 3. is a detail sectional view showing the different layers more clearly and
before the rim is turned.
As before stated our rim is composed of five layers, and for convenience of
reference and description we designate them A. B. C. D. and E, beginning at
the outer layer, which is designated A.
This outer layer has the grain lengthwise or longitudinal, and so have the center
layer C and the outer layer E.
The intermediate layers B and D. however, have the grain arranged crosswise or
transverse.
This arrangement of layers with the cross-grain makes the rim exceedingly

page_text: strong and durable, while the lengthwise arrangement makes a very elastic rim,
thereby providing a rim which is strong durable and elastic.
As the curve of the inner layer is greater, in proportion, than the outer one, and
as the inner layer has less strain than the outer one, we, prefer to make such layer
somewhat thinner than sail outer layer, and as the central layer has little or no
strain thereon, it is made thinner than the inner layer.
As the cross layers stiffen the rim, and prevent splitting, etc., they should be
made just thick enough to serve their intended purpose, but not so thick as to
detract from the elasticity of the rim, and to give the requisite strength, and at
the same time preserve the elasticity of the rim, we employ two such layers B
and 1), both of the same thickness, and each thinner than the central layer.
It will thus be seen that we provide an exceedingly cheap, simple and durable
rim, one which is strong and elastic, and one which we have found cannot be split
by any ordinary strain or blow.
We also prefer to employ a dark colored wood, such as walnut for layers B
and 1), and by this means the rine when finished will have two parallel bands or
stripes upon each side, thereby giving the rim a highly ornamental or fancy
appearance, and dispensing with painting or coloring the rim, it being only
necessary to varnish the rim to bring out clearly the different colors or stripes of
the wood.
Another object of making the out layers thicker than the others is now apparent
as it provides a sufficient body to cut the groove in to receive the pneumatic tire.
It will thus be seen that we provide an exceedingly cheap and simple form of
rim, one which is very strong, durable and elastic, and one which is fancy or
ornamental when properly varnished, but without the use of paints.
It will be observed from Figures 2 & 3 that in our improved wood rim the
junctions between the several layers are straight lines in cross section and our
invention is confined to rims in which the layers are thus arranged.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. An improved wheel rim composed of the inner, outer and central layers, the
grain of which run lengthwise, and the intermediate layers, the grain of which run
crosswise, substantially as shown and described.
2. An improved wheel rim having inner, outer and central layers the grain
of which runs lengthwise, and the intermediate layers the grain of which runs
crosswise arranged upon opposite sides on the central layer, and thinner than
said layer, substantially as shown and described.
3. An improved wheel rim composed of the inner outer and central layers, the
grain of which runs lengthwise and the intermediate layers the grain of which runs
crosswise the central layer being thinner than the inner layer, and the inter-
mediate layers thinner than the central layer, substantially as shown and described.
Dated, at Bowmanville, this 8th day of June 1896.
JOHN HOGG KYDD.
JOHN BERNARD MITCHEL.