Improvements in Two Speed Gear for Velocipedes.
Year: 1895

page_text: Date of Application, 26th Jan., 1895
Complete Specification Left, 26th Oct., 1895-Accepted, 14th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in Two Speed Gear for Velocipedes.
We JOHN CLOUGH, of 4, Rose Bank Manningham, Manager. Rochester
Illingworth, of Hill Street Coventry in the County of Warwick Manager and
JOSEPH BUSH of Gas Street, Coventry aforesaid Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in two speed gears, or speed and power
mechanism, for velocipedes and its object is to introduce the type of epicyclic
gearing described in Specification No. 19600 of 1891 between the sprocket or
chain wheel and the hub of a rear driven safety bicycle and other similarly driven
velocipedes.
For this purpose I mount the planet wheels upon studs projecting from the side
face of the hub or upon a disc or its equivalent secured to said hub. The sun
wheel is loosely mounted upon the wheel spindle and has a disc or its equivalent
secured to it by which it may be either locked stationary, or be locked to the hub
or sprocket wheel so as to revolve therewith. This locking disc may be arranged
at the same side of the hub as the sun and planet wheels, or the sun wheel may
be provided with a sleeve passing completely through the hub and the said disc
may be fixed to the projecting end between the cone and lock nut of its ball
bearings, or in any other convenient manner. The sprocket wheel is recessed and
is provided with annular or internal teeth to engage said planet wheels. When
the locking device is arranged at the same side of the hub as the sun wheel the
sprocket wheel is preferably mounted on ball bearings formed in the hub or in
the disc carrying the planet wheels or in both hub and disc.
As a modification the wheel spindle may have the sun wheel secured to it and
be so arranged that it can be held stationary or locked to the hub or sprocket
wheel to revolve therewith.
The revolving parts are mounted on ball bearings and the gearing is completely
enclosed and the parts are formed to exclude dust.
Dated this 25th day of January 1895.
DRACUP & NOWELL,
Bradford, Agents.
COMPLETE SPECIFICATION.
Improvements in Two Speed Gear for Velocipedes.
We, JOHN CLOUGH of 4, Rose Bank, Manningham, in the County of York,
Manager, Rochester Illingworth, of Hill Street Coventry, in the County of
Warwick, Manager, and JOSEPH BUSH, of Gas Street, Coventry, aforesaid,
Engineer, do hereby declare the nature of this invention and in what manuer
the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
The object of this invention is to adapt the type of epicyclic two speed gearing
described in Specification No. 19,600 A.D. 1891, to be introduced between the hub
sprocket (or chain) wheel and the hub of rear driving safety bicycles and other
similarly driven velocinedes.

page_text: In the accompanying sheet of drawings
Figure 1, represents a side view of a sprocket wheel on the hub of the driving
wheel of a safety bicycle fitted with our improvements.
Figure 2, represents a longitudinal section of the said sprocket wheel and hub.
Figure 3, represents a similar view to Figure 1, with the plate E (the reverse
side of which is shown in Figure 4) removed in order to show the internal
gearing.
Figures 5, 6 and 7 are views of detail hereinafter referred to.
The spindle B is stationary and has its ends preferably fixed in the usual way
in the back forks of the velocipede. This spindle has a collar Z formed on it
against which the ball bearing collar Y is fixed. A hardened steel bearing
piece W surrounds this collar and the set of balls V are placed between them.
A hub piece A 2 is tightly fitted over W and the side of the hub U is recessed and
fits tightly over this hub piece. Keys T (Figure 6) are fixed outside A 2 to engage
notches cut to fit them in the hub and insure the hub revolving therewith. In
this way the hub and the hub piece are rigidly connected together and the other
end of the hub is mounted on a set of balls S.
The hub piece A 2 has a disc A formed on it and an annular piece A 3 is fixed
parallel to its face by the four screws A4; spacing rings A 5 (Figure 2) are
placed upon the screws A 4 to hold A 3 the required distance away from . The
four cog wheels F are mounted an equal distance from the centre of the disc
between it and the annular piece A 3 upon pins d passed through them.
Figure 6, represents a separate side view of the hub piece with the wheels F
thereon.
The chain wheel D is mounted upon two sets of balls R and R2 revolving in
ball races R3 and R 4 respectively formed in the side face A 6 of the hub and
the periphery of the disc A. The chain wheel has internal teeth a which engage
the teeth of the wheels F. A diametrical section of the chain wheel is represented
by Figure 7.
The side plate E (an edge view of which is shown in Figure 5) is formed with
a boss E 2 by which it is mounted upon the two sets of balls P and P 2, and the
periphery of this boss has cog teeth e 2 cut upon it which also engage the
wheels F. This piece is provided with a radialiy sliding bolt O pressed outwards
by a spring N so that its teeth 02 engage the teeth a' and cause the plate to
revolve with the chain wheel and when in this position the hub U revolves at the
same speed as the chain wheel. If however the bolt O is disengaged from the
wheel D and the plate E held stationary a reduced speed is imparted to the hub
from the chain wheel.
The balls P revolve between a ball " cone P3 (screwed upon the spindle B)
and ball race E 3 formed in E 2. The balls P 2 revolve between a ball "cone" E 4
(mounted upon the inner end of E 2) and the ball race Y 2 formed in Y.
The device shown by the broken lines Figure 1 for which letters Patent
No. 4288 dated the 4th day of March 1892 were granted to two of the present
applicants is preferably employed to disengage the bolt O and hold the plate E
stationary.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :
The improved two speed mechanism for cycles herein shown and described and
illustrated.
Dated this 95th do..
100
DRACUP & NOWELL,
Bradford, Patent Agents.