Year: 1899

page_text: I, WALTER BIDDLES, of 62, Humberstone Road, Leicester, in the County of
Leicester, Cycle Maker, do hereby declare the nature of this invention to be as
follows:
The object of this invention is to provide a means whereby a tyre or part thereof
can be completely detached from the cycle for repairs or other purposes without
removing the wheel and without either detaching the chain or interfering with
it's adjustment in any way, at the same time avoiding the necessity of removing
or interfering with the gear case or chain guard should there be either on the
machine.
I therefore propose to make the back-fork-end (through which the axle of the
back wheel passes) completely detachable from all stays compression-tube or other
parts or fittings of the cycle so that when detached an open space is left all round
the back-fork-end or axle of sufficient size to allow a passage for the tyre, air
tube, cover or other desired part. This back-fork-end need only be used on the
side opposite to the one on which the chain is fitted but may be used on both
sides if preferred for other purposes.
The open space or aperture through which the tyre may pass, may be between
the stays (or tubes) and the back-fork-end provided such stay or tube can be
sprung, or removed in any way, a sufficient distance to allow a free passage of the
tyre or parts as required. This would avoid any necessity of interfering with the
nut on the end of the axle at all.
The nut however on the end of the axle may be loosed sufficient for the back
fork end to be turned thereon so that the space may be obtained without entirely
removing the back-fork-end from the axle and without springing or removing any
tube, stay, or attachment.

page_text: what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to back-fork-ends of cycles, and it's object is, to provide
means of making the back-fork-end entirely detachable from both the compression
tube and the seat-stay-tube on the side opposite the chain of a cycle, whereby,
when same is detached, the tyre or any part thereof which is detachable can be
completely detached from the cycle for repairs or other purposes without removing
the wheel, and without either detaching the chain or interfering with it's adjust-
ment in any way, at the same time avoiding the necessity of removing or inter-
fering with the gear case or chain guard should there be either on the machine,
in fact without disturbing a single screw or nut on the chain side of the cycle.
When this back-fork-end (through which the axle or spindle of the back hub
passes) is detached from the tubes as aforesaid an open space is left all round the
spindle or axle of the hub of sufficient size to allow a passage for the tyre, air-
tube, cover or other desired part.
This detachable back-fork-end need only be used on the side opposite to the
Bide on which the chain is fitted but may be used on both sides if preferred for
other purposes.
The open space or aperture through which the tyre may pass may be between
the stays or tubes and the back-fork-end, these stays or tubes remaining fixed to
each other without being disturbed and if these could be sprung sufficiently while
together the nut on the spindle or axle of the hub need not necessarily be loosened
at all thus leaving the back fork end undisturbed on the spindle or axle.
The nut on the end of the axle may however if proferred (to avoid the springing
of the tubes as aforesaid, and the necessity of entirely removing the back-fork-
end) be loosed sufficient for the back-fork-end to be turned thereon and thus
obtain the open space required.
The detachable part may be a piece joining the whole three parts (viz.:—the
compression tube, the seat stay tube and the back-fork-end) by one or more screws
in each joint or part.
I am fully aware that a great quantity of cycles have been made with one only
of the tubes aforesaid detachable from the back-fork-end on each side of the cycle.
This however does not accomplish the object now aimed at, therefore I now make
it detachable from both the tubes or from the tubes and back-fork-end as already
described in such a manner as to readily and easily give the aperture desired.
The method of attachment of one part to the other may be any of those
shown on the accompanying drawings viz. :-either clips, screws, or brazed joints;
brazed joints of course being only used in such points as are not required detach-
able, as for instance, in Fig. 9 of the accompanying drawings, the drawing shows
the part A 1 prepared or shaped for brazing to the compression tube, but this may
be bolted or clipped on as in the other forms, thus making the part A1 completely
removable this giving the desired aperture without disturbing either the nut on
the axle or the slotted part A2, and the adjustment of the hub would not then
be altered by any possible error of an inexperienced person.
Fig. 1 of the accompanying drawings represents the object and purpose of this
invention arranged and provided with the improvements herein described.
Fig. 2 is a front elevation and back and front cross section respectively of
the pattern of back-fork-end as used in Fig. 1, A represents the back-fork-end;
B represents the compression tube (which is in each case suitably plugged or
otherwise suitably stiffened at the end for attachment); C represents the seat stay
tube; E is the hub; F are the screws for attachment; G are spokes; H is the
nut, fitting on axle of hub, which grips the back-fork-end; I is the axle of hub.
Fig. 3 shows back-fork-end A with clip attachment to B gripped up by bolt F.
Fig. 4 shows back-fork-end A with another form of clip attachment, D forming
one half of clip with screws F passing through A which forms the other half.
Fig. 5 shows another form of attaching A to B Fig. 6 shows the compression

page_text: tube B flattened or fitted with a plug with flat surface, to fit up to a suitable
surface on slotted end A, held together by screws F.
Fig. 7 shows the compression tube B slotted to receive the flat back-fork-end A
but if preferred the back-fork-end may be the slotted portion and the end of the
compression tube B flattened or fitted with a suitable flat piece to fit the back-
fork-end A.
Fig. 8 shows the back-fork-end A clipped to the compression tube B by screw F,
the compression tube B being plugged sufficiently to stand the pressure of the
screw F.
Fig. 9 represents the slotted part A 2 being removable from the lug part AI,
and explains how the part A1 may be left to connect the compression tube B and
the seat stay tube C and by simply removing the pin which bolts A1 (or A3)
to A2 the tubes might be sprung sufficiently to allow a free passage for the tyre
or part thereof as explained in my Provisional Specification. Where brazed joints
are preferred A 3 may be used instead of A2, A3 being brazed to both the com-
pression tube B and seat stay tube C; as explained previously A2 need not neces-
sarily be brazed to the compression tube but may be bolted to it, A 2 then form-
ing the detachable part and giving the aperture desired without disturbing A 2 or
the nut on the axle which grips A2, thereby avoiding any alteration of the
adjustment of the hub by any inexperienced person.
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 cycle construction the improvement of back-fork-ends substantially as and
for the purpose described and set forth.