Improvements in or relating to Varying Speed Motions
Year: 1895

page_text: Date of Application 3rd May, 1895
Complete specification Left, 25th Jan, 1896-Accepted 29th Feb, 1896
PROVISIONAL SPECIFICATION
Improvements in or relating to Varying Speed Motions
I WILLIAM MARCH of 69 Adelaide Road South Hampstead London NW,
Engineer do hereby declare the nature of this invention to be as follows
1
My invention consists of a pair of step pulls the axles of which are parallel
with each other & at such a distance apart a to leave a space between the two step
pullies
Two friction wheels made of paper, wood, rubber or other suitable material,
are placed opposite to each other near each step of the step pullies, & are
arranged in such a manner that each pair of these friction wheels may be simul-
taneously pressed against or withdrawn from the step pullies by means of one & the
sar e hand lever combined, or otherwise, with a set of connecting rods & cranks or
by any other equivalent device
A spring or weight is connected to each set of mechanisms in such a way as to
thrust back the fiction wheel or wheels from the step pullies immediately pressure
on the hand lever is removed
Instead of a pair of fiction wheels thus acting in conjunction with each other,
one wheel only on one side of each step may be so placed & similaily acted upon
Or instead of a series of hand levers, cranks, connecting rods & friction wheels, as
hereinbefore described, one friction wheel, or one pair of the same, may be made to
travel from end to end of the step pullies, & when brought opposite to any required
pan of steps this friction wheel or wheels may be pressed against the step pullies by
the aforesaid hand lever & thus perform the same service in the accomplishment of
varying speed motion
Dand the 2nd day of M- 1905
Improvements in or relating to Varying Speed Motions
I, WILLIAM MARCH of 69 Adelaide Road, South Hampstead in the County of
London, Mechanical 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
My invention consists of a pair of step pullies A & B (Figs 1 & 2), either
pulley of which may be in constant motion and able, through the medium of
intermediate friction wheels, to communicate varying speed & power to the other
step pulley
The axles of these step pullies are parallel with each other and at such a distance
apart as to leave a space between the two step pullies Two friction wheels C,
made of paper, wood, or other suitable material, and revolving in small forked
levers C, are placed opposite to each other and near each step of the step pullies,
and are arranged in such a manner that both of these friction wheels may be
simultaneously pressed against, or withdrawn from, the step pullies in the following
mauner

page_text: By depressing the cranked lever handle D which is connected with a rod E to
the bell crank F working in a pedestal G, both of the fiction wheels are pressed
against both of the step pullies In Fig 1, only the highest and lowest pairs of
friction wheels are shown, while the two intermediate pairs are purposely omitted
so as to avoid confusion
In the application of this machinery for the pur nose of driving locomotives
I duplicate the lever handles belonging to cach pan of friction wheels, as shown in
the accompanying drawings By this arrangement the driver can stand on either
side of the frame according to the direction in which the locomotive is required
to run
Each of these double sets of lever handles is hinged at H so that the set not in
use may be pushed upwards out of the way A spiral spring J is connected to
each pair of lever handles by links K & rocking pieces L, & acts upon them in such
a way that instantly the driver ceases to bear on either lever handle, it & the
opposite handle are raised, and both of the friction wheels are at the same moment
withdrawn from contact with the step pullies
For locomotives or other similar purposes the upper step pulley will be in constant
motion, while the lower step pulley shaft may have keyed to it either a pinion or
a friction wheel M for communicating motion to a spur wheel or a laige friction
wheel N which, being keyed to the crank shaft P of a locomotive, imparts motion
to the driving wheels of the same through the ordinary means of connecting rods
Instead of a pan of friction wheels acting in conjunction with each other, as
herein before described, one friction wheel only on one side of each step may be so
placed & similarly acted upon
Instead of a series of lever handles, rods, cranks, pedestals & friction wheels, as
herein before described, one friction wheel, or one pair of the same may be made
to travel from end to end of the step pullies, & when brought opposite to any required
pair of steps, the friction wheel or wheels may be pressed against the aforesaid step
pullies
Instead of step pullies, a series of different sized pullies upon the same shaft,
in both cases, may be applied to answer the same purpose of varying both speed &
power
Instead of using a spiral spring, as before described, any other kind of spring, a
weight or a series of weights may be applied to disengage the friction wheels from
the step pullics
Having non particularly described & 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
A system of mechanism for varying speed & power, & for giving an increase in
tractional adhesion or gripping power, & a corresponding reduction in friction by
the simultaneous application of friction wheels bearing upon oppo ite sides of each
step of both step pullies al o the manner in which the same are applied thereto
& released therefrom substantially as herein described and ct forth
Dated this 25th day of January 1896
WILLIAM MARCH