IMPROVEMENTS IN TANDEM VELOCIPEDES to be as follows:-
Year: 1884

page_text: We WALTER JOHN LLOYD and WILLIAM PRIEST both of Quadrant Works
Sheepcote Street, Birmingham in the County of Warwick Manufacturers and
Copartners do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN TANDEM VELOCIPEDES to be as follows:-
"
Our invention consists in combining with a three track tricycle that is a tricycle
consisting of two large travelling wheels and a smaller steering wheel at the front
of and in a plane midway between the two travelling wheels the parts hereinafter
described so as to convert the tricycle into a tandem velocipede or a velocipede
driven by two persons one behind the other.
To the rear of the tricycle we connect a detachable back bone in a line with the
front back bone supporting the steering wheel. The said detachable backbone
carries the back rider's seat and the additional pair of pedals and also at its
extreme end a small supporting wheel The fork which supports this hind
supporting wheel is not rigidly connected to the detachable backbone but is con-
nected thereto by a vertical pin or joint so that the said supporting hind wheel is
capable of a horizontal swivelling motion to enable it to follow the path in which
the front steering wheel is travelling. The detachable backbone is connected to
the cross bar of the principal frame of the velocipede by hinge or knuckle joints 80
that the said backbone can rise and fall to permit it to follow the inequalities of
the road on which the hind supporting wheel is travelling The detachable back-
bone has a strong cross piece having near each end a hollow knuckle and the cross
bar of the principal frame has other knuckles with which the knuckles on the cross
piece can be engaged. By passing screw bolts through the engaged knuckles the
detachable backbone is connected to the cross bar of the velocipede. These hinge
joints besides permitting of the motion described of the backbone also permit of
the ready attachment of the additional mechanism to and its detachment from the
velocipede.
The pedals to be worked by the hind rider are carried at the bottoms of rocking
levers turning on the detachable backbone and the said pedals are connected by
roda to the principal pedals on the crank shaft at the front of the tandem velocipede
Or the rocking levers carrying the hind pedals may be inverted that is instead of

page_text: turning on the highest part of the backbone they may turn in brackets at the
lowest part of the backbone the pedals being connected to the tops of the rocking
levers.
By arranging the hind pedals and connecting them to the principal pedals in
this way the use of a second crank shaft and extra chain and chain wheels is
rendered unnecessary.
In order to convert by the use of our improvements a three track tricycle into a
tandem velocipede it is only necessary to connect the additional backbone by the
knuckle joints described to the rear of the cross bar of the principal frame and to
connect the rear pedals by their connecting rods to the front pedals on the crank
shaft the reconversion of the tandem velocipede into a tricycle being effected by
disconnecting the parts last described.

page_text: We WALTER JOHN LLOYD and WILLIAM PRIEST, both of Quadrant Works
Sheepcote Street Birmingham in the County of Warwick Manufacturers and
Copartners, do hereby declare the nature of our Invention for "IMPROVEMENTS IN
TANDEM VELOCIPEDES and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
"
Our invention consists in combining with a three track tricycle that is, a tricycle
consisting of two large travelling wheels and a smaller steering wheel at the front
of and in a plane midway between the two travelling wheels, the parts hereinafter
described so as to convert the tricycle into a tandem velocipede or a velocipede
driven by two persons, one behind the other.
To the rear of the tricycle we connect a detachable backbone in a line with the
front backbone supporting the steering wheel. The said detachable backbone
carries the back rider's seat and the additional pair of pedals and also at its
extreme end a small supporting wheel. The fork which supports this hind
supporting wheel is not rigidly connected to the detachable backbone but is con-
nected thereto by a vertical pin or joint so that the said supporting,hind wheel is
capable of a horizontal swivelling motion to enable it to follow the path in which
the front steering wheel is travelling. The detachable backbone is connected to
the cross bar of the principal frame of the velocipede by hinge or knuckle joints so
that the said back bone can rise and fall to. permit it to follow the inequalities of
the road on which the hind supporting wheel is travelling: The detachable back-
bone bas a strong cross piece having near each end a hollow knuckle and the cross
bar of the principal frame has other knuckles with which the knuckles on the cross
piece can be engaged. By passing screw bolts through the engaged knuckles the
detachable backbone is connected to the cross bar of the velocipede. These hinge
joints besides permitting of the motion described of the backbone also permit of
the ready attachment of the additional mechanism to and its detachment from the
velocipede.
The pedals to be worked by the hind rider are carried at the bottoms of rocking
levers turning on the detachable backbone and the said pedals are connected by
rods to the principal pedals on the crank shaft at the front of the tandem
velocipede. Or the rocking levers carrying the hind pedals may be inverted, that
is, instead of turning on the highest part of the backbone they may turn in
brackets at the lowest part of the backbone, the pedals being connected to the tops
of the rocking levers.
.
By arrauging the bind pedals and connecting them to the principal pedals in this
way the use of a second crank shaft and extra chain and chain wheels is rendered
unnecessary.
Figure 1 of the accompanying Drawings represents in side elevation (with the
left hand travelling wheel removed) and Figure 2 in plan a tandem velocipede
containing our improvements; Figure 3 represents in side élevation and Figure 4

page_text: in plan the detachable backbone and parts connected therewith drawn to a larger
scale than in Figures 1 and 2; Figure 5 represents one of the connections of the
back pedal connecting rods.
The same letters of reference indicate the same parts in the several Figures of
the Drawings; a, a are the two large travelling wheels on the cross bar or axis a
and b is the front steering wheel carried by the backbone c of the tricycle; d is the
seat for the front rider; e, e are the pedals for the front rider and f is the driving
chain. The parts which we have just enumerated constitute no portion of our
present invention.
.
•
We will now describe the parts constituting our invention; g, gå is the detachable
rear backbone situated in the same vertical plane as the front backbone c the said
parts g, g of the backbone being connected together by the vertical post 9 in
which the cross bar gripping handle h for the back rider slides and is fixed by a
set screw as represented. The lower part g of the rear backbone carries the post ¿³
for the back rider's seat i. The cross axis k of the lower part g of the rear back-
bone supports the rocking levers 112, 1, 12 the ends of the arms l, l of the said.
rocking levers carrying the rear pedals m, m. The ends of the other arms 12, 1 of.
the rocking levers have jointed to them at n connecting rods n, n which are
connected to the front or principal pedals e, e by the hook like connection repre-
sented in Figure 5. On the axis of each of the front pedals e, e is a swivelling eye
piece e into which the hook n³ on the end of the connecting rod n is engaged as
seen in the said Figure 5. By means of a gimp or split pin n' made to cross and
close the opening in the hook n³ the fastening of the connecting rod n to the front
crank is completed. By withdrawing the gimp or split pin n the hook na may be
unhooked from the eye piece e³ and the back pedal m may be disconnected from
the front pedal e.
-
At the extreme end of the backbone g, g' is the small supporting wheel p the
fork of which is not connected rigidly. to the said backbone but is capable of a
horizontal swivelling motion to enable the said hind supporting wheel p to follow
the path in which the front steering wheel b is travelling. This jointing of the
bind supporting wheel P is effected as follows:-q is a vertical pillar to the top, of
which the horizontal arm q² is jointed at q³ and to the sides of the said arm q³
the upper branches r, r of the fork of the bind wheel p are connected. The lower
branches, of the fork of the hind wheel are connected to the strap which
turns upon the bottom of the pillar q. The inner end of the arm q' carries an
anti-friction roller q* which is situated between the branches of the forked spring &
fixed at 82 to the seat post i. The free ends of the branches of the spring & are
connected together by the coiled spring t. As the hind supporting wheel p follows
the curved path of the front steering wheel b the short arm q2 is turned aside in
one or other direction and its roller acting on one or other branch of the forked
springs puts the said spring into a state of tension as indicated in dotted lines in
Figure 4 and on the front steering wheel b resuming its straight path the said
spring & restores the said hind supporting wheel p to its normal or middle position
at the rear of the velocipede.
The rear backbone is connected to the cross bar or axis a² of the principal frame
of the velocipede by hinge or knuckle joints so that the said rear backbone can rise
and fall to permit it to follow the inequalities of the road on which the hind
wheel p is travelling. The jointing of the rear backbone to the principal frame is
constructed as follows:-The ends of the upper part g³ of the rear backbone carry
the knuckle pieces u, u fixed thereto by screws and screw nuts and the cross bar
or axis a² of the principal frame has other knuckle pieces fixed to it between
which knuckle pieces u the knuckle pieces v are fitted and by passing a screw
bolt w through the engaged knuckle pieces u, v the detachable backbone is con-
nected to the cross bar or axis a of the velocipede. The hinge joints at u, v; u, v
besides permitting of the motion described of the rear backbone also permit of
the ready attachment of the additional mechanism to and its detachment from the
velocipede.

page_text: In order to convert by the use of the improvements described and illustrated, a
three track tricycle into a tandem velocipede it is only necessary to connect the
additional backbone g, g² carrying the several appliances described and illustrated
to the cross bar a² of the principal frame and to connect the rear pedals m, m on
the rocking levers 1, 12; 1, 12 by their connecting rods n, n to the front pedals e, e,
the reconversion of the tandem velocipede into a tricycle being effected by
unhooking the connecting rods n, n from the front pedals and removing the joint
pins at w, w.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that we
claim as our invention of "Improvements in tandem velocipedes "
Converting a three track tricycle into a tandem velocipede by jointing thereto in
the manner described and illustrated, the rear backbone g, g* carrying the following
combination of parts, namely, the back rider's seat and gripping handle, the rocking
levers to which the back pedals are connected, the connecting rods for connecting
the back pedals to the front pedals and also the back supporting wheel, the said
back supporting wheel being capable of a horizontal swivelling motion to enable it
to follow the path of the front steering wheel in conjunction with the appliances
described and represented for effecting the return to its normal or middle position
of the said back supporting wheel all substantially as hereinbefore described and
illustrated in the accompanying Drawings,
.
WALTER JOHN LLOYD.
WILLIAM PRIEST.