Improvements in and relating to the Driving Gear of Cycles.
Year: 1895

page_text: Date' of 'Applibation, 28th Feb., 4895
· Complete Specification Left, 4th Sept., 1895-Accepted, 30th Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Driving Gear of Cycles.
I ALICE MARY HEATH Pine Villa S. Mary Church Torquay no occupation'do
hereby declare the nature of this invention to be as follows:-
"The object of the invention is to increase the speed of a bicycle, or other
velocipede, without increasing the expenditure of power exercised by the rider:-
and it consists essentially in actuating the top, or uppermost cogs, or teeth of
the hub of the rear driving road wheel or wheels, of the bicycle, or other velocipede
in the following manner, namely
In lieu of the chain cogged gear wheel or sprocket to which the pedal crank axle
is affixed, a toothed wheel is employed, and made use of on the left side, socket for
its axle being fitted at joint of lower main tube, and centre stay; 'which toothed
wheel is worked, by cranks, and pedals in the ordinary manner.
In the rear of, and engaging with this toothed wheel, and actuated by it in
contrary direction, is a pinion: the circumference of said pinion being in proportion
of one third, more or less, of that of the sprocket: working on an axle the socket
for which is formed at extension of lower main tube at an angle, in line with, or
higher, or lower than, back forks; the back forks being joined to same: the
opposite end of which axle, being right side, is provided with a chain cog wheel,
same size as; or larger or smaller than, driving wheel hub: 'which actuates a driving
qhain in the contrary direction to that usual on safety bicycles, or other velocipedes.
(the lower part of chain, when worked, being taut, instead of the upper part);
The driving chain instead of engaging the cogs of hub of the driving wheel
directly, first passes round an idle chain cog wheel, or pulley rotating on axle fixed
at end of arm or arms projecting from, or bracketed to, 'back fork end, and back
stays, or one or the other: so situated that the lower cogs of this idle cog wheel,
or pulley, are slightly, and sufficiently below, and sufficiently behind the uppermost
cogs of hub of driving road wheel, and in such a manner as to be in a direct and
true line with the cogs of hub of the driving road wheel and the cogs of the front
chain wheel.
The chain thus necessarily, in returning to frout ohain cog 'wheel, (actuated by
the sprocket, and pinion before named) engages with the uppermost cogs, or teeth
of hub of driving Toad wheel, and so actuates the rotation of driving road wheel by
means of the uppermost cogs, or teeth only in contrast with the--back cogs as
usually engaged by the driving chain of bicycles, and other velocipedes:
The power expended by the rider thus producing more result than it would
otherwise produce:
Further increased by the improved leverage obtained by the position of the
fulcrum in relation to pinion actuated by leverage:
And moreover, the pinion being placed in the position as explained, securing the
greatest leverage at the point where it can be most powerfully, and most effectively
applied.
Dated-this 25th day of February 1895.
:

page_text: Improvements in and relating to the Driving Gear of Cycles.
I ALICE MARY HEATH Pine Villa S. Mary Church Torquay of no occupation
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:-
The object of the invention is to increase the speed of a bicycle, or other
velocipede, without increasing the expenditure of power exercised by the rider;
and it consists essentially in actuating the top, or uppermost, cog or cogs of the
back hub chain wheel of the rear driving road wheel or wheels of a bicycle, or
other velocipede.
Figure 1 represents the action of the toothed sprocket with cranks, in relation
to toothed pinion, and chain cog wheel fixed at opposite end of spindle or axle of
toothed pinion.
Figure 2 represents a side elevation of the chain cog wheel fixed at opposite or
right end of spindle or axle of toothed pinion, and its relation to driving chain.
Figure 3 is a continuation of Figure 2, and represents a side elevation of the
back hub chain oug wheel of the rear driving road wheel, in relation to driving
chain, and of idle, or loose cogged wheel, or pulley, in relation to driving chain.
A is the toothed sprocket shown in Figure 1. on the left side of crank axle,
actuated in ordinary manner by ordinary cranks B B fixed to axle, which works in
ball bearing socket formed at junction of lower main, or frame tube X, and centre
stay, or down tube Y.
C is the toothed pinion engaged by, and actuated by A, so that C shall revolve
in contrary direction to A; the circumference of C may be one third, or more or
less than one third, in proportion, of the circumference of A: the ball bearing
socket for axle or spindle to which C is fixed being in rear of A's socket, and
formed' in line with, and in, back forks Z Z.
D is the chain cog wheel fixed on right, or opposite end of the axle or spindle of
pinion C, revolving with C, in order to reverse the rotation of driving chain F,
which rotates round D and E, as compared with rotation of driving chain usual in
rear driving safety cycles.
E is the idle, or loose cogged wheel, or pulley, for driving chain F, which is so
placed in position, as to revolve in a true line with H and D, on axle or spindle
held firmly by arms G G³, and in such a manner, that the lowermost cogs of E
are below the level of, and in rear of, the uppermost cogs of H, and so placed in
position described, to guide driving chain F, that the driving chain F is made to
rotate in the reverse direction, and so made use of for forward propulsion, by
preventing F from passing below the back hub chain wheel H, and in such a
manner, that F shall engage the uppermost cog or cogs only of H, in its rotation.
F is the driving chain shown in Figures 2 and 3, and made to fit with not more
than necessary slackness.
GG' are arms, oue on each side of, and holding firmly, the spindle on which E
revolves; one of these arms G¹, at its other end is connected to, and projects from,
right side of ring of screw of axle of driving road wheel, and the second arm G
at its other end, is adjustably connected to, and projects from, right back star K,
in such a manner, that they, G and G, with this axle or spindle, hold E in
position described.
His the ordinary back hub chain wheel of rear driving road wheel, actuated
by F; represented in Figure 3 with ten cogs, but which may be made with more
than, or less than, ten ongs.
ZZ the forks, are made to accommodate the driving chain, by a bend shown in
Figure 3 at Z+, so that that part of the forks outside which passes is but slightly

page_text: more apart than the width of the tire T, Figure 2. in order that the width of tread
may be suitably narrow.
The power is applied at pedals, end of ordinary cranks B B, to A, which engages
pinion C, so causes C and D to revolve, and F. to rotate, in contrary, or reverse
direction to A: but as F guided over top of E, and rotates on E and D, and
as F in returning to D, is guided over top of H, F is so made to engage the
uppermost cog, or cogs only, of H, and in this manner the machine is propelled.
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. A combination of sprocket A, constructed and applied as described, pinion C,
and chain cog wheel D, operating substantially as and for the purpose specified.
2. The idle, or loose, cogged wheel, or pulley E, adjustably fixed in position
described, or in any manner so fixed in position described, and operating substantially
as and for the purpose specified.
3. A combination of the idle, or loose cogged wheel, or pulley E, adjustably
fixed in position described, or in any manner so fixed in position described, the
driving chain F, chain cog wheel D, pinion C, and sprocket A, with cranks, and
operating substantially as and for the purpose specified.
Dated this 3rd day of September 1895.
ALICE MARY HEATH,
Pine Villa, S. Mary Church, Torquay.