Improvements in and relating to Cycles.
Year: 1894

page_text: Date of Application, 3rd Aug., 1894
Complete Specification Left, 19th Dec., 1394-Accepted, 2nd Feb.,
1895
PROVISIONAL SPECIFICATION
Improvements in and relating to Cycles.
I, CHARLES BYRNE, of Cornwall Mansions, Baker Street, London in the
County of Middlesex, Cycle Manufacturer, do hereby declare the nature of this
invention to be as follows:-
My invention relates to a new device for checking the speed of cycles, and it
consists of a long narrow brush having a rigid back mounted on one of the members
of the fork or frame carrying the driving wheel so that it lies immediately above
the lower part of the chain. This brush is mounted in such a manner that its
position with respect to the driving chain can be varied in every direction. This is
conveniently effected by setting off the lower parts of the studs which carry the
brush and which are supported by clips embracing the member of the fork or frame
carrying the driving wheel, so that by rotating the said studs the lateral position of
brush can be varied. The longitudinal position of the brush is varied by moving
the clips carrying it along the member of the fork or frame, and its vertical position
is varied by means of the studs by which it is attached to the clips.
In use this brush is adjusted to just clear the face of the bottom part of the chain
when it is slack, i.e., when the machine is being driven forward. When the rider
back-pedals and thus straightens the lower part of the chain it comes into contact
with the brush, which thus automatically effects a checking action on the machine
and at the same time cleans the chain. The brush is preferably mounted on a
slightly curved back so that it presents a convex surface to the chain.
1904
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C.
Improvements in and relating to Cycles.
1, CHARLES BYRNE, of Cornwall Mansions, Baker Street, London, in the
County of Middlesex, Cycle Manufacturer, do 'hereby declare 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 to a new and improved device for checking the speed of
cycles, and it consists of a long narrow brush so mounted on one of the members of
the fork or frame carrying the driving wheel or wheels with respect to the driving
chain that it lies immediately above the lower part of it, and so close to it that
although it is not in contact with it when the machine is being driven forward and
the underside is slack, yet it comes into contact with it when the rider back-pedals
and so causes the lower part of the chain to become taut, the object being to
provide a simple and reliable brake and at the same time provide a means of
cleaning the chain.

page_text: actam
which :-
епи тц the manner snown by the accompanying drawing in
Figure 1 is a view in side elevation showing-by way of illustration only—the
application of my invention to the driving chain of a rear-driving bicycle.
Figure 2 is a view in side elevation of a modification in the construction of the
brush and in the method of mounting it.
Figure 3 is a view showing one construction of the fixing bolts, and
Figure 4 is a view showing a modification thereof.
Throughout the views similar parts are marked with like letters of reference.
The brush A consists of a number of suitable bristles mounted on a rigid back a
the forward part of which is preferably curved as shown. This brush is fixed to
the member X of the fork or frame carrying the driving wheel or wheels, adjacent
to the driving chain, by means of suitable clips B, B, and studs C, C. These
studs C, C, are cranked as shown by Figures 1 and 3 so that the position of the
brush may be adjusted transversely with respect to the member X of the fork or
frame to get the brush exactly under the driving chain Z which is represented by
fine dotted lines in the accompanying drawing. The studs C, C, are preferably
used also as two of the bolts to hold the parts of the clips B, B, together as shown
by Figures 3 and 4 in the accompanying drawing but they may be independent
thereof if desired. Instead of using cranked studs C, C, as shown by Figures 1
and 3 the said studs may have set-off arms or plates such as adapted to be attached
to the back a of the brush by independent bolts or screws e as shown by Figures 2
and 4.
The bristles of the brush A may be set either at right angles to the back a of the
brush as shown by Figure 1 or at an angle-sloping forwards-as shown by
Figure 2 to increase their resistance against the backward drag of the chain.
It will be seen that when the machine is being propelled forward and the under-
side of the driving chain is slack it runs clear of the brush A as shown by fine
dotted lines in Figure 1, but when the rider back-pedals to retard the speed of the
machine and the underside of the driving chain becomes taut it comes into contact
with the brush A as shown by dot and dash lines in Figure 1. The brush can be
adjusted to compensate for the wear of its bristles by means of the studs C, C.
It will be seen that the brush acts also to clean the inner face of the chain and if
desired a small brush such as D may be mounted as shown by Figure 2 to bear
against the outer face of the chain when the machine is being driven forwards and
thus clean both faces of the chain.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction hereinbefore described and illustrated by the accompanying
drawing, but that I hold myself at liberty to make such changes and alterations as
fairly fall within the spirit and scope of my invention.
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 device for checking the speed of cycles consisting essentially of a long
brush attached to the member of the fork or frame above the lower part of the
driving chain and adapted to check the speed of the machine through the driving
chain when it is being retarded by back-pedalling, as set forth.
(2.) The combination in a brake for checking the speed of cycles through the
driving chain, of a brush having a rigid back, and of cranked or set-off studs and
clips or clamps, for the purpose of adjusting the position of the brush with respect
to the driving chain.
(3.) In a brush brake acting on the driving chains of cycles, the combination
with the main brush, of an auxiliary brush for cleaning the outer face of the driving
chain, as set forth.
(4.) In a brush brake adapted to act on the driving chain of a cycle, the com-
bination with a brush such as A, of clips such as B, and cranked or set-off studs

page_text: such as C, all combined, arranged and adapted to operate, as and for the purpose
set forth.
(5.) The hereinbefore described combination of parts forming my improvements
in or relating to velocipedes.
Dated this 19th day of December 1894.
ROBERT E. PHILLIPS. M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.