Improvements in, Variable Speed or Speed and Power Mechanism for Velocipedes.or Cycles.
Year: 1896

page_text: Date of Application, 8th Feb., 1896
Complete Specification Left, 8th Dec., 1896-Accepted, 16th Jan., .1897
Improvements in, Variable Speed or Speed and Power Mechanism
for Velocipedes.or Cycles.
We, JOHN CLOUGH, of 4, Rose Bank, Manningham, in the County of York,
Manager, and JOSEPH BUSH, of Gas Street, Coventry, in the County of
Warwick, Engineer, do hereby declare the nature of this invention to be as
follows.:-
This invention, relates to improvements in that class of variable speed or speed
and power.mechanism, for cycles or velocipedes in which a sun and planet motion
is employed and at one speed the sun wheel is connected to and revolves with the
remainder of the mechanism and at the other speed is held stationary; and its
object is to provide a simple and reliable method of connecting said sun wheel to
the remainder of the mechanism and also for disconnecting it therefrom and holding
it stationary.
For this purpose we employ two conical or other friction clutches one to connect
the sun wheel to the remainder of the mechanism and the other to, hold the..sun
wheel stationary. A spring is arranged in connection with one of these clutches
(say the one for connecting the sun wheel to the remainder of the mechanism)
which is sufficiently strong to keep the clutch locked or in gear without mechanical
pressure is applied to disconnect the clutch. And the other clutch is provided
with mechanical means for operating it and is so constructed and arranged that
the act of locking it to stop the sun wheel disengages the first clutch. The
clutches may be so arranged that they are not both fully disengaged at the same
time.
A worm or cam operated by an arm or lever and connected to a convenient
handle may be employed to throw the clutch in or out of gear.
DRACUP & NOWELL;
Bradford, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Variable Speed or Speed and Power Mechanism
for Velocipedes or Cycles.
We, JOHN CLOUGH, of 4, Rose Bank, Manningham, in the County of York,
Manager and JOSEPH BUSH, of Gas Street, Coventry, in the County of
Warwick, Engineer 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 improvements in the two speed gear described in the
Specification of Letters Patent No. 1852 dated the 26th January 1895 and

page_text: similar two speed gears for velocipedes, and its object is to provide a smooth and
reliable method of changing the mechanism from one speed to the other.
Reference is to be had to the accompanying sheet of drawings forming a part of
this specification, in which similar letters of reference-indicate corresponding parts
in each of the figures.
Figure 1, represents a view of such parts of the mechanism described in the
above cited specification as are necessary to illustrate the application of our
improvements.
Figure 2, represents a side view and Figure 3, a diametrical section of the
.same.
Figures 4 and 5, are views of detain hereinafter referred to.
The shaft B and the sprocket wheel D are of the same form as those described
in the specification above referred to excepting that the latter has the cone shell D 2
rigidly fixed inside its rim after the remainder of the mechanism has been placed
inside.
A friction cone C is mounted upon the cylindrical extension C 2 on the sun
wheel 2 in such a way that it is free to be moved on the said extension either
towards or from the sun wheel e 2 but is prevented from rotating thereon by the
key C 3.
A spiral spring C4 is placed upon the boss C5 of the cone C and is
compressed between the side face of the cone and the flange C 6 round the sun
wheel and this spring is made strong enough to normally hold the cone against
the shell D2 with sufficient pressure to lock the sun wheel e 2 to the sprocket
wheel D.
To disengage the sun wheel from the sprocket wheel and hold the former
stationary a cam H is loosely mounted upon the extension P 4 of the ball cone P 3.
A lever H 2 is rigidly fixed on this cam and it may be actuated in any convenient
way to partly turn the cam when it is desired to change the speed. Figure 4,
represents a separate view of the cam and lever. The cam has two cam faces H 3
which bear against similarly formed faces J, J upon the face of the boss J 2 of
the cone shell J 4 mounted upon the extension H 4 projecting from the cam H.
Figure 5, represents a separate side view partly in section of the shell J 4.
It will be evident that by partly turning the cam in the direction of the arrow
Figure 2, the shell J 4 will be forced against the cone C and further. movement of
the cam will disengage the cone from the shell D 2 and the cone will be held by
the shell J 4. On reversing the movement of the cam the shell J 4 is disengaged
from the cone C and the spring forcing the latter outward again causes it to engage
the shell D 2.
The shell J4 may be prevented from rotating in any convenient way, as for
instance by the stud J 5 fixed in it loosely engaging a hole in the back fork K on
that side of the velocipede.
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 combination with two speed gears of the type specified, of friction clutches
arranged and operating substantially as herein shown and described and for the
purpose specified.
Tiated thin 7th dan D
حمد
DRACUP & NOWELL,
Bradford, Patent Agents.