A Tandem Bloyole Convertible into a Single Bicyole.
Year: 1894

page_text: NEW HIGH)
Date of Application (in United Kingdom), 29th Dec., 1894
Complete Specification Left, 4th Apr., 1895-Accepted, 29th. June, 1895
A Tandem Bloyole Convertible into a Single Bicyole.
I, JOHN EDWARD BECKWITH of Christchurch New Zealand, Engineer do
hereby declare the nature of this invention to be as follows:-
According to this invention the frame of a cycle is made in two parts capable
of being disjointed to admit of an additional part of a fiame to be introduced to
enable the conversion from a cycle to a taudem to be effected. The parts of the
frame fit into suitable sockets, having band, ring or other couplings capable of
being screwed up by cross screw to secure the parts of the frames in their
espective sockets. When converting a cycle, the usual pedals of same 'become
the back one, the front one being carried upon the additional part of frame
introduced, and an extra longth of chain. In making cycles for conversion at will,
an extra chain wheel is fitted upon the axle of the usual pedal cranks.
Dated this 28th day of December 1894.
FREDERIC PRINCE,
Agent for Applicant.
A. Tandem Bloycle Convertible.into a Single Bicyole.
I, JOHN EDWARD BECKWITH, of Christchurch, New Zealand, 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 :-
The object of this invention is to provide a tandem bicycle having the frame-
work so constructed as to be readily converted to a single bicycle.
"
To accomplish this object, 1 construct certain parts of the framework so that
they can be quickly detached and removed in order to enable the other parts to be
connected to form a single "Rover bicycle suitable for either a lady or a
gentleman, thus giving the advantages of a double and single machine at about
the same cost as an ordinary tandem machine.
The whole of the framework is very simple and exceedingly strong, yet light; the
weight of the entire machine being no greater than an ordinary taudem machine.
In order that my invention may be easily understood, I will now proceed to
describe the same by reference to the annexed sheet of drawings, wherein :-
Figure 1 is a side elevation of my tapdem bicycle.

page_text: Figure 2 is a plan of the lower clip coupling and back crank bracket, showing
the lower detachable tubes.
Figure 3 is a side elevation of the machine when converted to a single bicycle.
A, A, are the permanent tubes of the framework: B, the front wheel fork:
C, C, the back wheel forks D, D', the front and back handle bais respectively:
E, E, the front and back seat pillais respectively F, F1, F2, nie detachable
tubes connected to the permanent tubes of framework and back wheel forks by
clip couplings a, a', a. G. G, are also detachable tubes (more clearly shown in
Fig 2), the front ends being fitted into a clip coupling b, which carries the front
crank spindle c and cham wheel d, this coupling is fitted into another coupling e,
and secured by a bolt and nut f, the back ends of tubes G, G, are fitted into the
coupling a, and secured by bolt and nut g.
The crank spindle c may work in eccentric bearings as shown so that the
tension of the chain may be regulated The stem i, of the handle bai D', 18
fitted to the detachable tube F, the back seat pillar E, being fitted into the
detachable tube F. II, is a movable stay bar which may be use as shown or
(when the machine is required for a lady), moved to either of the positions
indicated by dotted lines in Fig 1. Other stay bais may be added if desired
The whole of the middle portion of the machine, consisting of the tubes F, F, F,
and G, G, together with the couplings a, a, a, and b, the front crank spindle c,
and cranks also the handle bar D', stem i, and sent pillar E', can be detached in
one piece; the back wheel forks C, C', together with the back wheel, can then be
coupled to the couplings a, and e, respectively, thus forming a single "Rover"
bicycle as shown in Fig. 3.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In tandem bicycles.
The framework having detachable tubes such as F, F, F, and G, G, coupled
to permanent tubes and back wheel forks by means of clip couplings, such
as a, a, a, e, and h, to enable such tandem bicycles to be readily converted to
Bingle "Rover" bicycles (as shown in Fig. 3), suitable for either a lady or a
gentleman, substantially as heretubefore described and illustrated in the annexed
drawings.
Dated this 4th do of Aunil 1905