An Improved Multiplying Gear for Bicycles, Tricycles, or any other Velocipedes.
Year: 1892

page_text: Date of Application, 13th Oct., 1892
Complete Specification Left, 4th July, 1893-Accepted, 12th Aug., 1893
PROVISIONAL SPECIFICATION.
An Improved Multiplying Gear for Bicycles, Tricycles, or any other
Velocipedes.
I, RAYMOND CHECKLEY of 71 Vyse Street Birmingham in the County of
Warwick, Machinist do hereby declare the nature of this invention to be as
follows:-
My invention relates to the gearing of bicycles, tricycles, or any other velocipedes,
and it comprises the improvements hereinafter described.
In carrying out my invention I make a multiplying gear by toothed or cog
wheels.
Firstly I make use of a driving wheel attached to the crank spindle by any
ordinary means or process now in use. The aforesaid driving wheel having internal
teeth or cogs.
Secondly I make use of a wheel formed in the shape of a collar with external and
internal teeth or cogs having the same pitch, or any proportionate ratio or number
of teeth or cogs, that I may think fit to use,-as the aforesaid driving wheel, and
revolving independently and eccentric round the aforesaid crank spindle of the
aforesaid driving wheel.
Thirdly I make use of an external toothed wheel having the same pitch or any
proportionate ratio or number of teeth or cogs, that I may think fit to use as the
aforesaid driving wheel and revolving eccentric collar.
In carrying out the arrangement hereintobefore described I advantageously
connect the gear of the aforesaid crank spindle by running the external and internal
toothed wheel or collar eccentric round the spindle centre, and I advantageously do
this by making use of a collar ball bearing, by connecting the aforesaid external
and internal toothed wheel or collar to the aforesaid driving wheel. The aforesaid
external and internal toothed wheel or collar running eccentric round the external
toothed wheel attached to the hub of the bicycle, tricycle or any other velocipede.
These toothed wheels or cogs hereintobefore described are connected up together
thusly, the internal teeth or cogs, of the aforesaid driving wheel attached to crank
spindle, work into the external teeth or cogs of the aforesaid external and internal
toothed wheel or collar. The internal teeth of the aforesaid external and internal
toothed wheel or collar work into and around the external teeth of the aforesaid
external toothed wheel attached to the hub of the wheel of the bicycle, tricycle, or
any other velocipede.
Thated this 11th doy of October 1899
COMPLETE SPECIFICATION.
An Improved Multiplying Gear for Bicycles, Tricycles, or any other
Velocipedes.
I, RAYMOND CHECKLEY, of 71 Vyse Street, in the City of Birmingham, 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 multiplying gear for use upon bicycles, tricycles and
other velocipedes, the object of the invention being to increase the speed of the
wheel beyond that of the driving pedals and to dispense with the ordinary system of
chain gearing now in common use for driving the machines.

page_text: In the accompanying sheet of explanatory drawings,
Figure 1 is a sectional elevation of my improved driving gear, Figure 2 being a
part end sectional elevation of the same.
Figures 3, 4, 5, 6 and 7 are detail views of the gearing and parts connected
therewith shown detached from the hub of the wheel for the purpose of enabling
the invention to be more readily understood.
The same letters of reference indicate the same parts throughout.
In carrying my invention into effect when applying it to a bicycle for the purpose
of dispensing with chain wheels and driving chain, I mount my gearing within the
hub or centre of the front or driving wheel of the machine, and I cause the crank
spindle to pass through this central hub or boss, the cranks or driving pedals being
connected to or carried upon the spindle A. in any usual or well known manner.
Upon the spindle A I securely mount a driving wheel B having its teeth b
arranged internally as shown in Figures 1, 2, 6 and 7. I cause this main driving
internal wheel B to work into an intermediate external tooth wheel C formed upon an
annular wheel or ring having internal teeth D also provided upon it for driving the
pinion wheel E secured to or in one with the central hub E¹ E² E³.
The action of my gearing is as follows-The crank or pedal spindle A com-
municates its motion from the wheel B connected to it, to an intermediate double
ring wheel CD which is mounted eccentrically within the wheel B. This ring
wheel D drives the pinion wheel E which is arranged to work within it and which
is formed upon or rigidly connected to the bub or boss E¹ E2 E³ of the ordinary
front or driving wheel of the machine. The proportions of the gearing wheels
I modify to suit any particular requirement so as to permit of differing ratios of
speed between the pedal spindle and the wheel hub being obtained, and to suit any
size of driving wheel which is to be mounted within the frame fork F F¹ of the
machine.
I prefer to form upon the driving wheel B a cone or seat for carrying the ball
bearings H³, and I arrange ball bearings H' to carry one end of the hub as shown
in Figure 1, the cone or collar G mounted upon the crank spindle A being also
arranged for receiving balls H carried within the ordinary fork end F and provided
with gland nut and tightening key and lock piece similar in form to the key L and
serrated nut K as shown in Figures 1, 3 and 4.
The intermediate ring or duplex wheel CDI carry upon ball bearings H2
having a nut K. and tightening key L carried upon the case M, the end of this case
being closed by a cap projecting from the bearing collar piece N¹ which is mounted
within one fork bar or member of the frame F' and which preferably forms one end
of the box or bearing for the balls H*.
I do not limit the application of my invention to any particular form of bicycle
or velocipede, but I employ the same essential features of an internal driving wheel
having an eccentrically placed intermediate duplex ring wheel for driving the
pinion or wheel secured to the boss or centre of any wheel or disc which it may be
required to drive in a similar manner to that hereinbefore described when arranged
for driving the front wheel of a bicycle.
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 construction of a gearing for velocipedes in which an eccentrically mounted
duplex ring is employed to work as an intermediate wheel for transmitting the
motion of a pedal or crank spindle to the hub or centre of a main or other driving
wheel, substantially as and for the purposes hereinbefore described..
2. In a velocipede, the combination and arrangement of a multiplying or speed
increasing gear arranged with the centre of the driving wheel, substantially as
herein before described and as illustrated in the accompanying drawings.
3. In a velocipede, the construction of an internally geared driving wheel such
as B for mounting direct upon the crank or pedal spindle such as A for transmitting

page_text: the motion of the pedal to other gearing carried within the central hub of the
wheel, substantially as hereinbefore described and as illustrated in the accompanying
drawings.
4. The construction and arrangement of a velocipede wheel hub or boss such
as E E E³ within which the multiplying gear is carried, substantially as and for
the purposes herein before described, and as illustrated in the accompanying
drawings.
Dated this 3rd day of July 1802
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.