Improvements in Driving Mechanism for Velocipedes.
Year: 1892

page_text: Date of Application, 30th Apr., 1892
Complete Specification Left, 26th Jan., 1893-Accepted, 22nd Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Driving Mechanism for Velocipedes.
I, CHARLES EDWIN BURTON of 149 High Street Bromley in the County of
Kent Carpenter do hereby declare the nature of this invention to be as follows:-
According to this invention an internally toothed spur gear is fixed to the frame
of the machine while a pinion mounted on the hub of the driving wheel, gears with
one of two cog wheels that are mounted on the crank and which gear into each
other. Motion is imparted to such gear by the operation of the crank shaft which
causes the driving wheel to revolve at any desired speed according as the machine
is geared up.
Or the internally toothed spur gear may be fixed on the crank and a cog wheel
mounted on the frame which latter gears with a pinion carried on a short crank
that is mounted on the hub or spindle and working in ball bearings. This crank
also carries a chain wheel while a second chain wheel is fitted to the hub of the
driving wheel which is either fast or loose on the axle. A chain works over such
chain wheels in the ordinary manner. When the crank is operated the toothed
spur gear operates the pinion which revolves round the larger cog wheel and so
operates the driving wheel.
Or the toothed spur gear may be fixed to the crank and two cog wheels mounted
on the frame working in ball bearings while a third cog wheel is mounted on the
hub of the driving wheel. In this arrangement when the spur gear is operated by
the crank it imparts a forward motion to the upper cog wheel which then rotates
the intermediate cog wheel in a reverse direction and this latter operates the third
cog wheel mounted on the hub.
Or the spur gear may be fixed on the crank and gear with a cog wheel mounted
on a spindle fitted to the frame of the machine and working in ball bearings.
Such spindle likewise carries a chain wheel mounted on the frame while a second
chain wheel is mounted on the hub of the driving wheel. When the crank is
operated it turns the toothed spur gear which operates the cog wheel and likewise
the chain wheels thus driving the machine.
Or the toothed spur gear may be fixed to the frame and a cog wheel mounted on
the hub, while a second cog wheel is mounted on a short spindle which carries the
crank axle, and is connected by a link plate to the main axle. When the crank is
operated it turns the short spindle, thus rotating the small cog wheel, which gears
with and operates the cog wheel on the hub, thus driving the machine.
Or a cog wheel may be made fast to frame and gear with a pinion mounted on a
spindle carried on a short crank and working in ball bearings. A chain wheel, and
also the crank axle, are likewise mounted on such spindle, while a second chain
wheel is fitted either on the hub or on the main axle. The hub may be either fast
or loose on such axle, and when loose one of the chain wheels may be dispensed
with. When the crank is operated motion is imparted to the pinion which revolves
round the larger cog wheel, and also to the chain wheels thus driving the machine.
Dated this 30th April 1892.

page_text: COMPLETE SPECIFICATION.
Improvements in Driving Mechanism for Velocipedes.
I, CHARLES EDWIN BURTON of 149 High Street, Bromley, Kent, Carpenter
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 has for its object to obtain increased power and higher speed, and
also a more compact arrangement of the driving mechanism, as the smaller the
wheel the smaller the size of the driving mechanism.
According to this invention an internally toothed spur gear is rigidly fixed to
the frame of the machine in any convenient position, while a pinion is mounted on
the hub or axle of the driving wheel, which pinion gears with two or more cog
wheels, hereafter called motor wheels, carried by the crank shaft or axle. These
motor wheels gear into the before mentioned toothed spur gear. Motion is imparted
to such driving mechanism by the crank shaft actuating the motor wheels, and so
causing the driving wheel to revolve at any desired speed according as the machine
is geared.
Figure 1 shews a sectional view of one form of my improved driving mechanism.
a is a box or casing enclosing my improved driving mechanism. b the internally
toothed spur gear.
e motor wheels mounted loose on studs g or their equivalents,
and carried by the platej fixed to the crank e. d pinion mounted on hub m. The
hub and motor wheels are provided with ball or other suitable bearings, the hub
running loose on the axle f. Provision is made in the ordinary way for the proper
adjustment of the hub to the driving mechanism. In this form of my invention
the ball bearings at one end of the fork are dispensed with thus reducing friction
and simplifying the construction. To prevent dust and dirt clogging the mechanism
collars are formed round the hub and box, which collars fit into each other, and
so protect the mechanism. j is a face plate fitted to the front of the box a to
further protect the mechanism from dirt. The ends of the studs g take into such
face plate and also into a ring at the back thereof, thus connecting the motor
wheels directly with the crank shaft, and rendering the mechanism easily accessible.
k is a lug whereby the mechanism is attached to the frame of the machine.
Figure 2 shews a modification of my invention wherein the hub is fast to the
axle instead of running loose thereon as shewn in Figure 1, while the crank e runs
loose on the axle on ball bearings l, or their equivalents, instead of being fastened
thereto as shewn in Figure 1. In this modification my improved mechanism is
fixed to each side of the machine, thus entirely dispensing with ball bearings to
the fork.
Figure 3 shews my improved driving mechanism mounted in the reverse position
to that shewn in Figures 1 and 2. When so reversed it is fitted with a cover j³ to
exclude dust and dirt.
Figure 4 shews a modification of my invention which consists in fixing an
additional motor wheel c¹ on the axle of the machine so as to gear with and actuate
the motor wheels c which are carried on studs 9 as previously described and kept in
position by the ring h.
The following is a description of this figure.
wheels c.
a box containing spur gear. 6 spur gear. c motor wheels carried on studs g.
c¹ additional motor wheel fixed on axle which additional wheel gears with and
actuates the motor wheels c. d pinion mounted on hub and actuated by motor
e crank. faxle. 9 studs. h ring plate which keeps the motor wheels o
in position. collars on hub. ; casing fitted to box a to protect the mechanism
from dust. klug for fixing the mechanism to the frame of the machine.
m hub
running loose on axle. In this figure the ring plate carried the studs g. instead
of plate j. Such ring plate h is shewn fitted between the motor wheels c while the

page_text: casing in this arrangement merely acts as a cover instead of serving to carry the
studs g as shewn in Figures 1. 2. 3.
Figure 5 shews a view in end elevation of my improved driving mechanism with
an arrangement of two motor wheels only.
Figures 6 and 7 shew similar views of such mechanism when three and four motor
wheels are employed. The object of increasing the number of such wheels is to
more equally distribute the strain over the various parts of the mechanism and so
obtain greater strength and a juster equilibrium.
Figure 8 is a detail view in section shewing how ball bearings may be used in
conjunction with my improved driving mechanism if desired. In this view n. n'are
ball bearings fitted in the box a running upon a recessed annular bearing piece o
so as to impart additional firmness and rigidity when extra strength is required.
I would here observe that I do not confine myself to the precise mechanical
details herein before described and shewn as the same admit of various minor
modifications without departing from the essential features 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
In a velocipede a driving mechanism consisting of the combination of an
internally toothed spur gear rigidly fixed to the frame of the machine in any con-
venient position with a pinion mounted on the hub or axle of the driving wheel
and gearing with two or more motor wheels all substantially as hereinbefore
described and shewn.
ليوم
T
VATAN
ELT & Co.,
33, Southampton Buildings, London, W.C., Agents for Applicant.