Improvements in or relating to Convertible Velocipedes.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or relating to Convertible Velocipedes.
I, LISTER LINDSEY, 463, East India Dock Road, Poplar, London, E.,
do hereby declare the nature of this invention to be as follows:-
Clerk,
This invention relates to improvements in velocipede frames, the object being
to enable the frame to be readily converted, that is to say for instance in the
case of a tandem bicycle, the frame may be readily disconnected so as to enable
one of the parts to be used as a frame for a single machine. I attain this object
by making the joints of the frame detachable at suitable parts the parts of the
frame and its arrangement being such as to allow of this. Any suitable form of
joints may be employed such as pin and socket joints, lap joints, or collar joints.
It will be seen that the parts of the frame may be readily taken apart, which
I also form the
cannot be done in the case in which the joints are brazed.
driving or gear wheels in two sections which may be secured together by means of
screws or bolts around the axle or spindle, a key or feather being employed for
the purpose of connecting the wheel securely to the spindle.
By this arrangement a tandem machine may be readily separated into two
parts one part being used as a frame for a single bicycle, and the wheels being
formed in sections enables them to be readily removed as required.
E. EATON,
Agent for Applicant.
Improvements in or relating to Convertible Velocipedes.
I, LISTER LINDSEY, 463, East India Dock Road, Poplar, London, E., Clerk,
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 improvements in velocipede frames, the object being
to enable the frame to be readily converted, that is to say for instance in the
case of a tandem bicycle the frame may be readily disconnected so as to enable
the two parts to be used as frames for single machines. In which case auxiliary
steering heads and back forks are attached to the two sections by means of
joints hereinafter described. I attain this object by making the joints of the
frame detachable at suitable parts, the parts of the frame and its arrangement
being such as to allow for this. Any suitable form of joint may be employed

page_text: such as a pin and socket joint, lap joint, or collar joint. It will be seen that
the parts of the frame may be readily taken apart, which cannot be done in the
case in which the joints are brazed. I also form the driving or gear wheels in
two sections which may be secured together by means of screws or bolts around
the axle or spindle, a key or feather being employed for the purpose of connecting
the wheel securely to the spindle.
By this arrangement a tandem machine may be readily separated into two
frames each frame as a single bicycle, and the wheels, being formed in sections,
enables them to be readily removed as required.
For purposes of illustration I will now refer to the annexed drawings,
Figure 1, is a side elevation shewing my joint detached,
Figure 2, sliding collar.
Figure 3, perspective view of clipping collar.
Figure 4, view of joint in position.
Figure 5, side elevation of divided driving or gear wheel,
Figure 6, side elevation of a tandem frame,
Figure 7, side elevation of a frame "converted" to a single.
The tubes or the like a to be jointed are shaped as shewn having recesses b
into which the projections c engage respectively. The sliding collar d is then
brought into position so that the pin e will pass down the slot f in the collar d,
which being then partially rotated will cause the pin to enter the recess g thus
locking the collar in position. The shape of this recess may be so arranged (such
as by being curved) as to prevent the vibration causing the collar to be disengaged
from the pin e.
Referring to Figure 5, it will be seen that the driving or gear wheel is formed
in two parts and h which are bolted together by means of the bolts and nuts j.
The two sections of the wheel are provided with the recesses of suitable shape
for the reception of the key or the like for securing the wheel to the axle or
driving spindle of the machine.
It will be seen that by this arrangement, the driving or gear wheel may be
readily removed by releasing the bolts i, when it is desired to change the
gear, which would be the case when " converting "from a tandem to a single
frame, and by this means a larger or smaller wheel may be substituted more readily
than by the ordinary method.
Referring to Figure 6, when it is required to convert the velocipede from a
tandem to a single, the frame is detached at 1 m, m³, n, n¹, o, p at which points
I employ my improved joint as described. Part 1 is then removed and the
head 3 is fixed to the part 2 at points n, n', o, thus forming a frame for a single
bicycle as shewn in Figure 7.
By this arrangement it will be seen that a tandem machine may be readily
separated and the frames then connected together for use as a single machine.
By the employment of this form of joint the necessity of brazing is dispensed
with.
Referring to Figure 3, the collar m is secured around the joint by means of
the pin and nut o.
Although for purposes of illustration I have described one form of joint, it will
be readily seen that there are various modifications in the construction of the
joint which may be made as found convenient, but I find that the joint in which a
sliding sleeve or collar is employed is the most convenient.
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. In convertible velocipede frames of the class herein described; the com-
bined construction and arrangement of the various parts substantially as described
and illustrated herein.

page_text: 2. In joints for velocipede frames; the employment of a sliding collar or
sleeve adapted to enclose or surround the junctions or ends of the parts of the
frames or tubes to be connected, and being secured in position by means of a
pin attached to one of the parts and adapted to lock the sleeve or collar in position
the ends of said frame or tubes being formed with corresponding projections and
recesses adapted to engage with one another; all in combination and substantially
as described and illustrated herein.
3. In joints for velocipede frames: the employment of a split collar or sleeve
adapted to enclose or surround the junctions or ends of the parts of the frames
or tubes to be connected, and being secured in position by means of a screw
bolt and nut, the ends of said frames or tubes being formed with corresponding
projections and recesses adapted to engage with one another; all in combination
and substantially as described and illustrated herein.
4. A gear or driving wheel formed in two sections and having recesses formed
in the sections for the reception of a key or pin when the sections have been
bolted together around the axle or driving spindle for the purpose of securing
the driving or gear wheel in position, all in combination and substantially as
described and illustrated herein.
Dated this 10th day of Sentombar 1808