Certain Improvements in Driving Gear for Bicycles and Tricycles and other Velocipedes.
Year: 1892

page_text: Date of Application, 20th Oct., 1892
Complete Specification Left, 20th July, 1893-Accepted, 2nd Sept., 1893
PROVISIONAL SPECIFICATION.
Certain Improvements in Driving Gear for Bicycles and Tricycles
and other Velocipedes.
I, HENRY MORGAN, of Rothesay House, Foleshill Road, Coventry, Warwick-
shire, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to driving gear for use in front driving bicycles
tricycles and other velocipedes for causing the driving wheel to revolve faster than
its axle, to which latter in a bicycle or a front driving tricycle the cranks are fixed
and this invention consists of the herein described improvements in driving gear of
that kind which consists essentially of four spur wheels which I will call respectively
A B C and D the wheel A being fixed to and revolving with the driving wheel
axle and gearing with the smaller spur pinion B which with another spur wheel C
revolves about a secondary axis adjacent to the driving wheel axle and this spur
wheel gears with a fourth smaller spur pinion D fixed to the hub of the driving
wheel of the machine, so that when the said axle is revolved the driving wheel
revolves at the required higher velocity. By my invention the bearings and other
parts of the said gearing are so arranged that they will keep true for a long time
thereby causing but little friction; moreover the said spur wheels B and C on the
secondary axis can readily be removed and replaced by others so as to gear the
machine proportionately higher or lower as may be required.
:-
My said invention as applied to a front driving bicycle is carried out as follows:-
The crank axle (about which as before stated the driving wheel is required to
revolve at a higher velocity) passes through a tube which is fixed crosswise in the
front fork of the machine, by means of nuts at or near each end of the tube between
which the arms of the fork are respectively gripped so that the tube and fork are
perfectly rigid. The lower ends of the said arins of the fork are by preference
slotted underneath so that by screwing back the said nuts along the tube the latter
and the driving wheel and its axle and driving gear can be removed or replaced.
The said two nuts which are outside the fork are cupped or coned so as to form ball
bearings for the crank axle on which latter there are coned or cupped collars to bear
upon the balls. The said driving wheel revolves on ball bearings on the said tube
these bearings being formed by the said two nuts which are between the arms of
the fork being coned outside and the ends of the hub of the wheel being cupped to
contain the balls. The secondary axis about which the spur wheels which I have
called B and C revolve, is carried by one arm of the said fork which is prolonged
downwardly or at one side. This axis is or may be in the form of a pin having a
head at one end and a nut at the other and arranged to revolve in a short tubular
bearing piece which has a head at one end and a nut at the other between which the
said arm of the fork is gripped. The said nut and the head of the bearing piece
are cupped out to receive the balls and there are coned collars on the said axis to
bear thereon, one of these collars being adjustable for wear.
The said spur
wheels A and B are fixed upon the crank axle and the secondary axis respectively
at one side of the said arm of the fork and at the other side of this arm between this
arm and the driving wheel the spur wheels C and Dare fixed upon the secondary axis
and the hub of the driving wheel respectively these spur wheels being proportioned
to cause the driving wheel to revolve the required speed faster than the crank axle.
By unscrewing the nut on the said tubular bearing piece the latter and the secondary
axle and the spur wheels B and C can readily be removed or replaced when
required.
Dated this 10th day of fotohr 1000
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Certain Improvements in Driving Gear for Bicycles and Tricycles
and other Velocipedes.
I, HENRY MORGAN, of 14, Park Grove, Wordsworth Road, Small Heath,
Warwickshire, Engineer, late of Rothesay House, Foleshill Road, Coventry
-Warwickshire, aforesaid, 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 reference to driving gear for use in front driving bicycles
tricycles and other velocipedes for causing the driving wheel to revolve faster than
the axle, to which latter in a bicycle or a front driving tricycle the cranks are fixed
and this invention consists of the herein described improvements in driving gear of
that kind which consists essentially of four spur wheels which I will call respectively
A B C D the wheel A. being fixed to and revolving with the driving wheel axle
and gearing with the smaller spur pinion B which with another spur wheel C
revolves about a secondary axis adjacent to the driving wheel axle and this spur
wheel C gears with a fourth smaller spur pinion D fixed to the hub of the driving
wheel of the machine so that when the said axle is revolved the driving wheel
revolves at the required higher velocity. By my invention the bearings and other
parts of the said gearing are so arranged that they will keep true for a long time
thereby causing but little friction; moreover the said spur wheels B and C on the
secondary axis can readily be removed and replaced by others so as to gear the
machine proportionately higher or lower as may be required.
My said invention as applied to a front driving bicycle is carried out as I will
now describe by referring to the accompanying drawing on which
Figure 1 represents what is known as a geared ordinary bicycle with my improved
driving gear applied;
Figure 2 is a side view and Figure 3 is a front view of the lower part of the fork
with the driving wheel axle and hub, cranks and driving gear on. an enlarged
scale;
Figure 4 is a longitudinal sectional elevation through the gear of the driving
wheel axle ;
Figure 5 shews the driving wheel axle and one of the. spur wheels with the
crank separately;
Figure 6 is a front and side view of the fork extension and
Figure 7 shews the lower part of the fork and parts connecting the fork ends
together as hereinafter described.
The crank axle E (about which as before stated the driving wheel F is required
to revolve at a higher velocity) passes through a tube G which is fixed crosswise
in the front fork H of the machine by means of nuts 1 1 J¹ J2 at or near each
end of the tube G between which nuts the arms of the fork H are respec-
tively gripped so that the tube and fork are perfectly rigid. This tube G with
its nuts J J2 and the fork ends are shewn separately by Fig. 7. The
lower ends of the arms 2 of the fork H may be slotted underneath so
that by screwing back the nuts I 12 along the tube. G the latter and the driving
wheel F and its axle E and driving gear can be removed or replaced; or the said
fork ends may be made solid as shewn.
•
The two nuts I 12 which are outside the fork H are cupped or coned as
shewn so as to form ball bearings for the crank axle E on which latter there
are coned or cupped collars e¹ e to bear upon the balls. The cupped collar e
forms a portion of the boss of the spur wheel A. The driving wheel E revolves
on ball bearings on the tube G these bearings being formed by the two nuts J¹ J2
which are between the arms of the fork being coned outside as shewn and
the ends of the hub of the wheel F being cupped to contain the balls. The
wheel D is by preference made in a piece with one end of the hub F as shewn

page_text: and secured to the main portion of the hub by being screwed therein and secured
by pegs. The above described arrangement of the tube G fixed to and
tieing together the fork ends h³ ³ by the nuts ¹ [ J¹ j² forms an important
feature of this invention as by this arrangement the axle bearings are rendered
perfectly rigid.
The secondary axis L about which the spur wheels B and C revolve, is carried
by the arm of the fork H which arm is prolonged downwardly as shewn or
at one side of the fork H. This axis L is or may be in the form of a pin as
shewn having a head at one end and a nut 12 at the other and arranged to
revolve in a short tubular bearing piece M which has a head m¹ at one end and
a nut m at the other between which the arm of the fork H is gripped.
The nut m and the head m' of the bearing piece M are cupped out as shewn
in Fig. 4 to receive the balls and there are coned collars c on the axis L
to bear on the balls the collar n¹ being screwed on the axis L and thus made
adjustable for wear. The spur wheels A and B are respectively fixed as shewn
upon the crank axle E and the secondary axis L at one side of the arm of the
fork H and at the other side of this arm between this arm and the driving
wheel F the spur wheels C and D are fixed upon the secondary axis L and the
hub of the driving wheel Frespectively these spur wheels A B C and D being
proportioned to cause the driving wheel F to revolve the required speed faster
than the crank axle E. By arranging the spur wheels A and B on one side of the
fork extension and the spur wheels CD on the other side thereof 1 equalize the
thrust of the gear.
By unscrewing the nut m² on the tubular bearing piece M the latter and the
secondary axle and the spur wheels B and C can when the fork extension /¹ is
made open at the bottom as above described be readily removed or replaced when
required.
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. In bicycles tricycles and other velocipedes in which the pedal axle passes
concentrically through the driving wheel hub and power and rotary motion are
transmitted from the pedal axle to the driving wheel hub by means of spur gearing
of the kind herein referred to, the employment of a tube such as G and nuts such
as I 12 J J for tieing the ends of the fork together the nuts 11 12 J¹ J² being
cupped to receive the balls of the ball bearings of the driving wheel and pedal
axle all substantially as herein before set forth and shewn on the accompanying
drawing.
2. In bicycles tricycles and other velocipedes in which the pedal axle passes
concentrically through the driving wheel hub and power and rotary motion are
transinitted from the pedal axle to the driving wheel hub by means of spur gearing
of the kind herein referred to, arranging the two spur wheels A B on one side of
the fork extension h' and the other two spur wheels CD on the other side of the
same thereby equalizing the thrust of the gear wheels in combination with the
secondary revolving axis L and its bearings all constructed and arranged substan-
tially as hereinbefore set forth and shewn on the accompanying drawing.
3. In bicycles, tricycles and other velocipedes in which the pedal axle passes
concentrically through the driving wheel hub the employment of driving gear having
its parts constructed and arranged in the manner substantially as hereinbefore
described and illustrated by the accompanying drawing for transmitting power
and rotary motion from the pedal axle to the hub of the driving wheel.
Dated this 19th day of July 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.