Improvements in and relating to Velocipedes.
Year: 1893

page_text: Date of Application, 17th July, 1893
Complete Specification Left, 17th Apr., 1894-Accepted, 19th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Velocipedes.
I, GEORGE LEONARD MORRIS, of 15 Wells Street, Gray's Inn Road, in the
Parish of St. Andrews Holborn, in the County of London, Cycle Manufacturer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved method of mounting driving chain wheels
on pedal-crank axles, and it consists in reducing the boss of the crank on the inner
face thereof and in mounting the chain wheel thereon, the object being to provide
a ready means of removing the chain wheel from and replacing it on the axle.
I attain this end by reducing the diameter of the boss on the inner face of the
crank adapted to be fixed to the end of the pedal-crank axle carrying the chain
wheel. The said boss is reduced to two diameters the one nearest the face of the
crank to receive the boss of the chain wheel and the other part to receive a lock
nut to fix and lock the chain wheel to the crank. The boss of the chain wheel
may either have teeth or serrations cut or formed on its face adapted to engage
with similar teeth or serrations on the face of the boss of the crank, or it may be
threaded to screw on the reduced part of the boss of the crank which is threaded
to receive it, in which case the said screw thread is cut right or left-handed
according to the side of the machine the driving chain wheel is fixed, the object
being to cause the driving strain to tighten the chain wheel on to the crank.
Dated this 17th day of July 1893.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.
Improvements in and relating to Velocipedes.
I, GEORGE LEONARD MORRIS, of 15, Wells Street, Gray's Inn Road, in the
Parish of St. Andrews Holborn, in the County of London, 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:-
My invention relates to an improved method of mounting driving chain wheels
on pedal-crank axles, and it consists in reducing the boss of the crank on the
inner face thereof and in mounting and fixing the chain wheel thereon, the object
being to provide a ready means of removing the chain wheel from and replacing
it on the axle.
I attain this end in the manner shown by the accompanying drawing in which
Figure 1 is a view in section showing one method of carrying any invention into
practice.
Figure 2 is a similar view showing an alternative method of carrying my
invention into practical effect, and Figures 3 and 4 are views showing another form
my invention may assume.
Throughout the views similar parts are marked with like letters of reference.
According to my invention I reduce the diameter of the boss a of the crank A,
adapted to be fixed to the pedal-crank axle X, on the inner face thereof. The

page_text: said boss a is reduced to two diameters the one a¹ nearest the face of the crank to
receive the boss of the chain wheel B and the other part a² to receive a nut C to
fix and lock the chain wheel to the crank. The hole or eye in the boss of the
chain wheel B is threaded to adapt it to be screwed on to the reduced part a¹ of
the boss of the crank which is threaded to receive it as shown by Figure 1, the
said screw thread being preferably cut either right or left-handed according to the
side of the machine the driving chain wheel is fixed, and the thread of the lock
nut is the reverse of that of the chain wheel so that the driving strain will tend to
tighten the chain wheel on to the crank, and back-pedalling will not tend to loosen
the lock nut.
As an alternative the part a' of the boss a of the crank is made plain to receive
the chain wheel B, the adjacent faces of the bosses of the chain wheel and crank
being toothed or serrated to cause the two parts to firmly interlock when the nut C
threaded on the end a² of the boss of the crank is tightened up. This interlocking
of the abutting faces of the bosses of the crank and chain wheel may be effected
by means of one or more dowel pins as shown by Figure 2, by means of teeth or
serrations as shown by Figures 3 and 4, or by means of any equivalent device.
By this construction it will be seen that the chain wheel can be detached with
and as easily as the crank.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction herein before 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. The improved method of mounting the driving chain wheel on the pedal-
crank axles of velocipedes, substantially as herein before described and illustrated
by the accompanying drawing.
2. In a velocipede, mounting the driving chain wheel on the boss of one of the
driving cranks in the manner herein before described with reference to Figure 1 of
the accompanying drawing.
3. In a velocipede, mounting the driving chain wheel on the boss of one of the
driving cranks in the manner hereinhefore described with reference to Figure 2 of
the accompanying drawing.
4. In a velocipede, mounting the driving chain wheel on the boss of one of the
driving cranks in the manner hereinbefore described with reference to Figures 3
and 4 of the accompanying drawing.
Dated this 17th d
S A 1 1001
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.