Year: 1888

page_text: We WALTER JOHN LLOYD and WILLIAM PRIEST trading as The Quadrant Tricycle
Company of Sheepcote Street Birmingham in the County of Warwick Velocipede
Manufacturers do hereby declare the nature of this Invention to be as follows:-
Our invention has reference to the adjusting of the spindles of the rear driving
wheels of safety bicycles and the spindles of the driving wheels of other velocipedes
for the purpose of tightening or adjusting the driving chains upon the said driving
wheels.
As our invention is specially applicable to rear driving safety bicycles we will
describe it in connection with the spindle of the rear driving wheel of a bicycle of that
kind.
The spindle on which the hub of the driving wheel works is fixed in longitudinal
slots made in the ends of the branches of the fork of the backbone. In these slots the
spindle is capable of sliding for adjusting the tension of the driving chain. The said
adjusted spindle is fixed in the said slots by means of screw nuts screwed upon the
screwed ends of the spindle projecting from the outer sides of the branches of the
backbone fork.
In the parts for adjusting the spindle of the rear driving wheel as ordinarily made
it is difficult to adjust the said spindle in both branches of the fork so as to ensure a
parallelism between the spindles of the rear driving wheel and the front or steering
wheel of the bicycle.
This object we effect in a simple and efficient manner by the use of the following
adjusting parts.
Through the angular collars at the ends of the spindle which collars slide in the slots in
the branches of the backbone fork we form screwed holes or screw boxes crossing the
spindle at right angles. In these screwed holes or screw boxes adjustable screw pins
or screw stops are fitted each screw pin or stop being situated parallel to the sides of the
slot in which it is situated and its inner end abutting against the end of the said slot.
The pull or tension of the driving chain presses forward the spindle and maintains the
037

page_text: ends of the adjusting screw pins carried by it against the ends of the slots in the back
bone fork. By turning the adjusting screw pins or stops in one or other direction the
spindle is made to slide in one or other direction in the fork slots so as to change
its position and thereby tighten or adjust the driving chain. After the spindle has
been adjusted in the fork slots it is fixed by the ordinary external screw nuts. The
position of the adjustable spindle in the fork slots for tightening or adjusting the
driving chain can by this arrangement be effected with great facility and with such
nicety as to preserve the parallelism of the spindles of the rear driving wheel and
front or steering wheel of the bicycle.
Our invention may be applied to all kinds of bicycles tricycles and other velocipedes
which require their driving or chain wheels made capable of adjustment for the
purpose hereinbefore described.

page_text: We WALTER JOHN LLOYD and WILLIAM PRIEST trading as The Quadrant Tricycle
Company, of Sheepcote Street Birmingham in the County of Warwick, Velocipede
Manufacturers do hereby declare the nature of our invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
Our invention has reference to the adjusting of the spindles of the rear driving
wheels of safety bicycles and the spindles of the driving wheels of other velocipedes
for the purpose of tightening or adjusting the driving chains upon the said driving
wheels.
As our invention is especially applicable to rear driving safety bicycles we will
describe it in connection with the spindle of the rear driving wheel of a bicycle of that
kind.
The spindle on which the hub of the driving wheel works is fixed in longitudinal
slots made in the ends of the branches of the fork of the backbone. In these slots
the spindle is capable of sliding for adjusting the tension of the driving chain.
The said adjusted spindle is fixed in the said slots by means of screw nuts screwed
upon the screwed ends of the spindle projecting from the outer sides of the
branches of the backbone fork.
In the parts for adjusting the spindle of the rear driving wheel as ordinarily made
it is difficult to adjust the said spindle in both branches of the fork so as to ensure a
parallelism between the spindles of the rear driving wheel and the front or steering
wheel of the bicycle.
This object we effect in a simple and efficient manner by the use of the following
adjusting parts.
Through the angular collars or flattened parts at the ends of the spindle, which
collars or flattened parts slide in the slots in the branches of the backbone fork, we
form screwed holes or screw boxes crossing the spindle at right angles. In these
screwed holes or screw boxes adjustable screw pins or screw stops are fitted, each
screw pin or stop being parallel to the sides of the slot in which it is situated and its
inner end abutting against the end of the said slot. The pull or tension of the driving
chain presses forward the spindle and maintains the ends of the adjusting screw pins'
carried by it against the ends of the slots in the backbone fork. By turning the
adjusting screw pins or stops in one or other direction the spindle is made to slide in
one or other direction in the fork slots so as to change its position and thereby
tighten or adjust the driving chain. After the spindle has been adjusted in the fork
slots it is fixed by the ordinary external screw nuts.
Figure 1 of the accompanying Drawings represents in side elevation a portion of
the rear driving wheel and adjuncts of a safety bicycle provided with our invention
and Figure 2 represents a plan of the same; Figure 3 represents a plan, partly in
section, of the spindle and hub of the rear driving wheel together with a portion of the
fork of the backbone drawn to a larger scale; Figure 4 represents afsides elevation of
the same and Figure 5 a section taken through one of the slotted branches of the fork.
The same letters of reference indicate the same parts in the several Figures of the
Drawings.

page_text: a is the rear driving wheel of the safety bicycle and b is the spindle on which the
hub a² of the wheel a turns as usual, the said hub a² carrying the chain wheel cover
which a chain d from the chain wheel e on the pedal axis passes as usual;f, are the
slotted branches of the fork g g carried by the backbone h. In the slotted branches f,f
the angular collars or flattened parts k, k of the spindle b slide for adjusting the tension
of the driving chain. On the screwed ends of the spindle projecting from the outer
sides of the branches f,f of the fork, screw nuts ll are screwed for binding the
adjusted spindle in the slots in the said branches ff. The parts constituting our
invention for adjusting the position of the spindle in the slots in the branches ff of
the fork are as follows:
In the angular collars or flattened parts k, k of the spindle screwed holes or screw
boxes are made crossing the spindle at right angles. In these screwed holes or screw
boxes adjustable screw pins or screw stops m, m are fitted, each screw pin or stop m
being in the middle of and parallel to the sides of the slot in which it is situated the
inner end of the pin or stop abutting against the end of the said slot as best seen
in Figure 5. The screw pins or stops m m are turned by a screw driver; or the
heads of the said pins or stops may be made angular for turning them by a spanner.
It will be understood by an examination of Figures 1 and 5 that the tension of the
driving chain on the hub pulls the spindle in the direction of the backbone h and
thereby preserves or presses the ends of the adjusting screw pins or stops against the
ends of the slots in the slotted branches of the fork.
By turning the adjusting screw pins or stops m, m in one or other direction the
screw boxes of the angular. collars or flattened parts k k of the spindle are made
to travel upon the said screws and slide in one or other direction in the fork slots f, f
so as to change the position of the spindle and thereby tighten or adjust the driving
chain. The spindle is then fixed in its adjusted position by the external screw
nuts 1, 1.
The position of the adjustable spindle in the slotted branches ff of the fork for
tightening or adjusting the driving chain can by this arrangement be effected with
great facility and with such nicety as to preserve the parallelism of the spindles of the
rear driving wheel and front or steering wheel of the bicycle.
Our invention may be applied to all kinds of bicycles, tricycles and other velocipedes
which require their driving or chain wheels made capable of adjustment for the purpose
hereinbefore described.
Having now particularly described and ascertained the nature of our inven-
tion and the manner in which the same is to be performed we declare that what we
claim is :-
The construction and combination of parts hereinbefore described and illustrated in
the accompanying Drawings for adjusting the spindles of the driving or chain wheels
of bicycles tricycles and other velocipedes for tightening or adjusting the driving
chains of the said wheels; that is to say, the adjusting screw pins or screw stops in the
slots of the slotted branches of the backbone fork, fitted and working in screwed holes
or screw boxes in the angular collars or flattened ends of the spindle sliding in the said
slotted branches of the backbone fork for the purpose and substantially as described
and illustrated.
Dated the Eighteenth day of March 1889.