Improvements in Dust Guards for the Hubs of Wheels, Bicycle Pedal Crank Axles, and the like.
Year: 1897

page_text: Date of Application, 12th Oct., 1897-Accepted, 22nd Jan., 1898
COMPLETE SPECIFICATION.
Improvements in Dust Guards for the Hubs of Wheels, Bicycle Pedal
Crank Axles, and the like.
1, FREDERICK WILLIAM GOLBY, of 36, Chancery Lane, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, as communicated to me by Rainhold
Franz Edward Gabriel, Innkeeper, of Teichstatt (on the Bohemian Northern
Railway), and Franz Eitrich, Mechanist, Kreibitz, both in Bohemia, Austria, to
be particularly described and ascertained in and by the following statement:
This invention relates to a dust-guard, which is especially intended for applica-
tion to the hubs of wheels and the pedal crank axles of bicycles.
This dust-guard by reason of the material employed, viz., a strip of felt, is
capable of serving as a lubricating pad, so that there is but the smallest conceivable
frictional resistance, and also the smallest possible wear and tear of the axle pin.
This strip of felt which is of annular shape and quadrangular or square in cross-
section is according to the present invention stretched in such a manner that its
sponge like or absorbent nature is unimpaired and conveys the lubricant from
within to the parts in contact with the ring of felt.
Dust-guards constructed in this manner are illustrated in various forms on the
accompanying drawings. These various forms are distinguished from one another
in so far that the cap is so arranged that it can be applied to bicycles that are
being newly built, certain parts being arranged accordingly. or can be applied
subsequently to existing bicycles. In the latter case the cap is divided into two
parts, by a plane passing through the axis of rotation.
The
Fig. 1 shows a dust-guard according to this invention, in which the ring of felt a
is supported on one side by a metallic disc band on the other side by a cap c.
cap is internally threaded on its edge cand screws over a screw threaded exten-
sion of the hub. In this way the felt is enabled to act in four directions, (1)
it lies on the one side against the axle, and (2) on the other side against the
cylindrical surfaces of the projection of the hub; (3) the felt lies against the
flat surfaces of the metal ring b, and (4) against the even inner surfaces of the cap c.
In the example shown in Figs. 2 and 3 an india rubber ring g is introduced
between the hub d and a cap f. This cap f, as shown in Fig. 3 which is a section
on the line 3 3 of Fig. 2, is bipartite, that is to say, it is, as aforementioned,
divided into two halves by a plane which passes through the geometrical axis of
the shaft e. The connection of the two halves of the cap is effected by means of
a screw h on one side and by a bolt or like contrivance on the other side (sec
Fig. 3). Between the two halves of the cap strips of india rubber are intro-
duced in order to secure a completely certain air-tight closing. Into this cap f
the ring of felt a is introduced. This ring in the present example is uniformly
compressed by a circular spring m. The cross-section of the cap f is of such a
kind that the felt ring a is enclosed from three sides, viz., outside and on its two
surfaces.

page_text: Whilst in the example shown in Figs. 2 and 3 the cap is of cylindrical shape
it can also be made, as shown in Figs. 4 to 8, of a conical form.
A dust-guard of the kind hereinbefore described is exceedingly easy to put on or
remove and is a protection against rain as well as dust.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:―
1. A dust-guard for the hubs of wheels, bicycle pedal crank axles and the like,
characterised by a stopping or packing ring a, made of felt. for the purpose of
effecting the lubrication of the part of the axle covered by such ring, and keeping
out dust, substantially as described with reference to Fig. 1 of the accompanying
drawings.
2. A dust-guard of the kind indicated in claim 1 hereof, the distinguishing
feature of which is that the cap f. is divided into two by a plane passing through
the axis of the shaft the two parts being separated from one another. by strips of
india-rubber (Fig. 3) and from the hub by an indin-rubber ring y Fig. 2, so
that the cap or guard can be applied to existing bicycles substantially as described
and illustrated in Figs. 2 to 8 of the accompanying drawings.
Jated THIS
Bay
October
F. W. GOLBY,
36, Chancery Lane, London, W.C.