Year: 1896

page_text: I, WILLIAM BOYD HENDERSON, of 14 Dundonald Road, Kilmarnock, Ayrshire,
Photographer, do hereby declare the nature of this invention to be as follows:-
This invention relates to cycles and it has for its object to improve the construction
of the gearing.
The gearing may be adapted to drive either the front or back wheel. As a front
driver it is constructed as follows:-
Fastened rigidly to each side of the hub of the driving wheel are two toothed
pinions which revolve inside of two rim wheels, one at each side, provided at their
inner peripheries with teeth or recesses which mesh with the teeth of the aforesaid
pinions. Made in one with or secured to these rim wheels are the pedal cranks which
are preferably stayed at each side to give additional strength.
The rim wheels are grooved or made so as to run on balls travelling round the
periphery of metal discs or eccentrics formed one with or attached to the prongs of
the steering fork and forming the basis thereof.
Semi-circular strips or flange pieces are removably secured to the inside of the
rim wheels for the purpose of retaining the balls in place and additional strips can,
if necessary, also be secured to these wheels for the purpose of excluding dust from
the ball bearings.
The discs or eccentrics are pierced to admit of the axle of the driving wheel being
secured to them, at either side, by a nut and screw.
When the invention is adapted for driving the back wheel, the two pair of forks of
the frame, at the bottom or foot, are formed into discs or eccentrics as before.
With this arrangement the pressure exerted on the pedals is directly applied to the
rim wheels and from them is transferred to the pinions of the hub.
Dated this 16th day of September 1896.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
I, WILLIAM BOYD HENDERSON, of 14 Dundonald Road, Kilmarnock, Ayrshire,
Photographer, 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 cycles and it has for its object to improve the construction

page_text: The gearing may be adapted to drive either the front or back wheel. As a front
driver it is constructed as follows:-
Fastened rigidly to, or made one with, the hub of the driving wheel are two toothed
pinions which revolve inside of two rim or crown wheels, one at each side, provided
at their inner peripheries with teeth or recesses which mesh with the teeth
of the aforesaid pinions. Made in one with or secured to these rim wheels are the
pedal cranks which are preferably stayed at each side to give additional strength.
The rim wheels are grooved or made so as to run on balls travelling round the
periphery of metal discs or eccentries formed one with or attached to the prongs of
the steering fork and forming the basis thereof.
Semi-circular strips or flange pieces are removably secured to the inside of the rim
wheels for the purpose of retaining the halls in place and of securing said rim wheels
on the peripheries of the discs on which they revolve. Additional strips can, if
necessary, also be secured to these wheels for the purpose of excluding dust from the
ball bearings.
The axle of the driving wheel is secured to the dises at the base of the steering fork
by rigid arms one on each side which are made in one with the discs. The axle is
secured to these arms by a nut and screw or equivalent device.
When the invention is adapted for driving the back wheel the two pair of forks
of the frame are joined together at the foot and are also formed into dises or eccentrics
as before.
The gear is so constructed that the toothed pinions will always mesh with the
forward part of the inner peripheries of the rim wheels, that is, the part nearest the
front of the machine.
With this arrangement the pressure exerted on the pedals is directly applied to
the rim wheels and from them is transferred to the pinions of the hub, and, at the
same time, an upward leverage is exerted on the non-rotating axle of the driving
wheel.
And in order that my said invention may be properly understood I have hereunto
appended two explanatory sheets of drawings, whereon,
Fig. 1 is a side view showing the gear.
Fig. 2 is a vertical section taken on the line A-A Fig. 1.
Fig. 3 is an inside view of one of the rim or crown wheels.
Fig. 4 is a vertical section of the same on the line XX Fig. 3.
Fig. 5 is a side view of the hub with its pinion f.
Fig. 6 is a longitudinal section through the hub and its pinions f,f'.
Fig. 7 is a view showing the disc k and part of one of the prongs d of the
fork.
Fig. 8 is a vertical section taken on the line Y, Y, Fig. 7.
Fig. 9 is a longitudinal section on the line Z, Z, Fig. 7.
On the drawings the same reference letters wherever repeated indicate the same or
similar parts.
Referring to the drawings:-
a is the hub to which the spokes c are attached in any well known manner. b is the
axle which is screwed at each end. n are cones screwed upon the axle. d, d, are the
prongs of the steering fork and, as shown at Figs. 7, 8 and 9, a disc k is preferably
inade in one with the lower part of each prong. Springing from each prong is an arm;
made with a jaw j¹. The jaws of the arms, as shown at Figs. 1and 2, receive the ends
of the axle b which latter is held in place by means of the nuts m. e Fig. 3 are balls
which run upon the turned edge k¹ of each disc k. e Fig. 2 are the balls of the ball
bearings of the axle.
The wheels g and glare arranged one at each side of the driving wheel of the
machine and as shown clearly at Figs. 2 and 4 have internal crown teeth i¹ cut on the
rim or edge i. The teeth of the pinions f, f, which are, by preference, made in one
with the hub a mesh with the teeth of the crown wheels g, g¹. In order to retain
the balls e in place within the groove o of each crown wheel rings are used which are
secured by means of screws entering into screwed sockets tapped in the crown

page_text: wheels. Instead of using a complete ring / two semi-circular strips may be used and
secured in the same manner to each crown wheel.
The crown wheel g has a driving crank h made in one with it whilst the crown
wheel gl has a driving crank h¹ made in one with it. These cranks are preferably
stayed as shown at Figs. 1 and 2 by means of stays ho, ho, and h², h2, respectively.
The axle b is a non-rotating one and the hub a revolves upon it being driven by
the internal teeth of the crown wheels which mesh with the teeth of the pinions f, f¹,
of the hub.
The whole gear is compact and there is but a small space between the pedals as the
pinions f, f are arranged within the fork.
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
consider novel and desire to claim is :-
1. Cycle gearing having, in combination, two cogged rim or crown wheels provided
with pedal cranks, two rigid dises upon which the rim or crown wheels revolve, two
pinions formed one on each side of the hub of the driving wheel whose teeth mesh
with the teeth of the crown wheels, and a non-rotating axle upon which the hub
revolves, substantially as herein before described with reference to the drawings
annexed.
2. In a cycle the combination of the driving wheel, the non-rotating axle for the
wheel, the hub made with a pinion at each side and arranged within the prongs of
the steering fork, the discs at the lower ends of the fork, and the rim or crown wheels
having pedal cranks combined therewith and revolving upon the discs, the teeth of
said wheels meshing with the teeth of the pinions on the hub, substantially as
hereinbefore described with reference to the drawings annexed.
Dated this 1st day of June 1897.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.