Improvements in the Frames of Bicycles.
Year: 1896

page_text: Date of Application, 20th Jan., 1896
Complete Cancification Late 0th Out
COLL
love 4008
Date of Application, 20th Jan., 1896
Complete Specification Loft, 9th Oct., 1966 Accepted, 29th Nov. 1908
PROVISIONAL SPECIFICATION.
Improvements in the Frames of Bicycles.
I, FRANK HULME, of Woodlands Park, Altrincham, in the County of Chester,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to that part of the frame known as the back fork and is
designed to so construct it that the wheel can be removed or the back axle adjusted
without disturbing the chain adjustment and that the driving chain can be adjusted
without disturbing the adjustment of the back axle.
It consists essentially in constructing the tubes from the seat and the lower
horizontal tubes from the cranks with a bracket on the end of each one of which
is provided with a bolt hole and the other with a slot to receive a hole, by which
they are connected and one fitted with a nut and the other with two eyes through
which an adjusting screw is passed by which the distance between the crank axle
and the back axle can be readily adjusted.
In carrying out the invention at the bottom of each of the tubes leading down
from the seat I affix a bracket or its equivalent. This bracket is provided with a
bolt hole or slot and at its extremity a slot to receive the end of the back axle it
is also fitted with an eye bolt forming a nut or a projection to receive an adjusting
screw. Each of the tubes leading from the cranks is also fitted at its end with a
corresponding bracket or its equivalent provided with a slot or bolt hole and is also
fitted with one or two eyes or projections to receive an adjusting screw.
The two tubes are connected or secured by a bolt passed through the hole in one
bracket and through the slot in the other and the position of the inclined tube
relatively to the axis of the crank axle is adjusted by the screw passing through
the lugs or projections on the brackets.
The axle of the back wheel is bolted into the open slots provided for it and can
be removed and replaced without unfastening or altering the adjustment of the
brackets, similarly these brackets can be adjusted to tighten or slacken the driving
chain without unfastening the axle.
Dated this 17th day of January 1896.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.
Improvements in the Frames of Bicycles.
I, FRANK HULME, of Woodlands Park, Altrincham, in the County of Chester,
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 :-
This invention relates to that part of the frame known as the back fork or stays
and is designed to so construct it that the wheel can be removed or the back axle
adjusted without disturbing the chain adjustment and that the driving chain can be
adjusted without disturbing the adjustment of the back axle.

page_text: It consists essentially in constructing the inclined tubes or stays which extend
from the seat or saddle and the horizontal tubes or stays which extend from the
cranks each with a bracket at the end one of which brackets is provided with a bolt
hole and the other with a slot to receive a bolt whereby they are connected and
one fitted with a nut and the other with two eyes through which an adjusting
screw is passed by which the distance between the crank axle and the back axle
can be readily adjusted.
The invention will be fully described with reference to the accompanying
drawings.
Fig. 1. Side elevation of bicycle.
Fig. 2. Enlarged detail being side elevation of the extremities of the back
stays.
Fig. 3. Back elevation of same partly in section.
At the lower extremity of both of the inclined tubes or stays A of the back
wheel B I affix a bracket C and at the extremity of both of the horizontal stays D
I affix a corresponding bracket E.
The bracket C is provided with a bolt hole a to receive a bolt F and at the
extremities with an open slot g to receive the end of the back axle G. It is also
fitted with an eyebolt H or boss solid with bracket forming a nut to receive an
adjusting screw K.
The bracket E is provided with a radial slot d through which the bolt F also
passes and is also fitted with two projecting lugs L in which the adjusting screw K
is free to rotate.
It is to be understood that a slot such as d may be formed in the inclined
bracket C and a hole (such as a) in the horizontal bracket E also that the lug or
eyebolt H forming a nut for the adjusting screw may be attached to the bracket E
and the lugs L in which the adjusting screw rotates may be attached to the
bracket C but I at present prefer the arrangement shown.
The two tubes or stays A and D are connected or secured by the bolt F passed
through the hole a in one bracket and through the slot d in the other and the
position of the inclined tube or stay A relatively to the axis of the crank axle is
adjusted by the screw K passing through the lugs H and L on the brackets C
and E.
The axle G of the back wheel is bolted into the open slots g provided for it and
can be removed and replaced without unfastening or altering the adjustment of the
brackets similarly these brackets can be adjusted to tighten or slacken the driving
chain M without unfastening the axle.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a bicycle frame the combination with the inclined stays A. and the
horizontal stays D respectively of the detached brackets C and E at their
extremities one provided with a bolt hole such as a and the other with a slot such
as d, the bolt F passing through the slots a and d to secure the two brackets
together, the adjusting screw K passing through a nut H on one bracket and lugs L
in the other for the purpose of adjusting the tension of the chain and the vertical
slot g in the bracket C to permit of the axle being removed without altering the
adjustment substantially as and for the purpose described.
2. The arrangement and construction of frame for adjusting the tension of the
driving chain and for allowing of the removal of the back wheel without altering
such adjustment substantially as and for the purpose described and shown.
Dated this 3rd day of October 1896.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.
WM. P. THOMPSON & Co.,
Manchester, Liverpool, and London, Patent Agents.