Improvements in Chainless Bicycles.
Year: 1898

page_text: Date of Application, 29th Dec., 1898
Complete Specification Left, 29th Sept., 1899-Accepted, 4th Nov., 189 8
I, HENRY ALLOTT, of 13, Higher Benta Lane, Bredbury, in the County of
Chester, Dyer, do hereby declare the nature of this invention to be as follows.-
This invention relates to an improved construction of driving gear for chain-
less bicycles whereby its weight is very little if any at all increased and the
pedalling rendered very easy.
To this end I fix upon one end of the hind wheel axle a pinion in gear with
an internal wheel adapted to run on a stud secured to the bottom back fork.
The hind wheel is fast upon its axle and the latter adapted to rotate in ball
bearings fitted into the ends of the hind fork
To the outer side of this internal wheel I secure a double crank having its
pins or fulcrums preferably set at a light angle to each other. The respective
end of the crank axle I also furnish with a double crank having its pins or
fulcrums set at a right angle to each other.
The outer of the double cranks on the crank axle 18 formed with an arm
furnished at its free end with a pedal whilst the opposite end of the crank
axle 18 furnished with an ordinary pedal crank
Each pan of crank pins are connected together by a rod which communicate
otary motion from the pedal cianks to the said internal wheel and the latter
by means of the said pinion to the lund wheel of the bicycle.
Improvements in Chainless Bicycles.
I, HENRY ALLOTT, of 13, Higher Bents Lane, Bredbury, in the County of
Chester, Dyer, do hereby declare the nature of this invention and in what
manner the same 18 to be performed, to be particularly described and ascer
tained in and by the following statement:-
This invention relates to an improved construction of driving gear for chain-
less bicycles whereby its weight is very little if any at all increased and the
pedalling rendered very easy
And in order that my invention may be more fully understood I have caused
to be appended hereunto one sheet of drawings marked with letters of refei-
ence indicating like parts in the various figures.
Fig 1 18 a side view, Fig. 2 a sectional plan, Fig 3 a side view,
a plan of a modification of my improved bicycle driving gear.
DQ71
and Fig 4

page_text: d
In carrying out my invention I fix upon one end of the hind wheel axle a, a
pinion b, in gear with an internal wheel c adapted to run on or having a stud
running in a boss formed on the bottom back fork h
In the present instance the stud runs in a boss e formed on a bracket
end of which is brazed or otherwise secured into the bottom back fork
one
and
to the other is screwed the hind fork f', which bracket forms the bearing for
the hind wheel g.
'
The hind wheel is fast upon its axle a and the latter adapted to rotate
in ball bearings fitted into the brackets f, f.
To the outer side of this internal wheel c I secure a double crank, having
its pins or fulorums k, preferably set at a right angle to each other. The
respective end of the crank axle 1, I also furnish with a double crank m having
its pins or fulcrums n, n' set at a right angle to each other
The outer pin or fulcrum n¹ of the double crank m on the crank axle / has
an arm o furnished at its free end with a pedal p which forms the crank pedal
for that side whilst the end of the crank axle at the opposite side is furnished
with an ordinary pedal crank p¹.
Each pair of crank pins or fulcrums k, n & k², n¹ 18 connected together
by a rod q, q' respectively, which communicates 1otary motion from the pedal
cranks o & p to the internal wheel and the latter by means of the pinion b
to the hind wheel g of the bicycle
In lieu of forming the said crank pins or fulcrums on arms as described,
they may be formed on discs r,r, see dotted lines and in lieu of employing the
internal wheel c at the side of its pinion b it may be mounted in the bracket f of
the bottom back fork h, below the axle of the hind wheel as will be readily
understood the former way appearing however preferable.
In order to compensate for wear I form the connecting rods q, q³ in two
parts, one adapted to slide in the other and secured together by set screws s
According to a modification of my invention, see Figs. 3 & 4, I may secue
the pedal arm o to the fulcrum or pin n and pivot the respective end of the
rod to the pedal stud n' whilst the back end I connect to the fulcrum ¹ of
the double crank i which in length and position is made to correspond with the
pedal arm o By this modification I obtain greater leverage and reduce the
strain on the crank bearings
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is.-
In chainless bicycles, the combination of two double cranks & m having
displaced pins or fulorume k, ¹ & n, n' respectively pairwise connected together by
rods q, q, the clank being part of or formed on an internal wheel suitably
mounted and gearing into a pinion b secured upon the hind wheel axle a, and
the crank m formed on or secured to the pedal crank axle, all substantially as
and for the purpose set forth