IMPROVEMENTS IN THE CONSTRUCTION OF TANDEM SOCIABLE TRICYCLES
Year: 1884

page_text: Ì CHARLES WILLIAM RUDOLPH DUERRE, of 15 Kings Road, Chelsea, in the
County of Middlesex; Watch and Clock Maker, do hereby declare the nature of my
said Invention, for IMPROVEMENTS IN THE CONSTRUCTION OF TANDEM SOCIABLE
TRICYCLES" to be as follows:-
The object of my invention is to construct Tandem Sociable Tricycles in an
improved manner.
My improved Tandem Tricycle is fitted with two large front wheels, and one
smaller bind steering wheel. The back bone is so formed as to resemble the
letter T, the head of the T being horizontal and placed a short distance above the
main axle, and parallel therewith, to which the main axle is attached by brackets
or other suitable means. To this T piece the two carriers for the pedals are
attached, one pair of pedals being placed in front of the head of the T piece, and
the other pair about midway between the front (main) axle and the steering wheel.
Each pair of pedals drives a chain wheel, and each of these chain wheels is geared
to a chain wheel (usually of larger diameter) fitted to the main axle, which is
actuated thereby.
The main axle is fixed in the hub of one of the large wheels, but runs sufficiently
free in the hub of the other large wheel to enable the tricycle to work round
curves with facility, and is of a sufficiently close fit to furnish the necessary friction
for driving the free wheel when the tricycle is going in a straight line.
.Above the back bone the seats for the riders are fitted to telescopic standards,
with the usual springs and adjusting screws, there being sufficient distance between
the front and back seats to enable the riders to sit comfortably; the front seat
being fitted for the accommodation of either a Lady or Gentleman.
The steering gear is placed on the right hand side of the hind rider, and the
brake gear on his left.
A pair of handles are fitted for the accommodation of the person sitting on the
front seat, by holding which steadiness is secured while working the pedals or
merely sitting still.
I usually cause the brake to act upon the hub of the loose, wheel, but I do not
confine myself to any particular form of brake; and I may mention that I find the
speed of the machine can be readily checked by means of the pedals only.
The steering wheel is mounted in a fork in the usual manner, with a tiller head
and actuating rod driven by a pinion working in a toothed rack.

page_text: COMPLETE DE LUIFICATION,
I, CHARLES WILLIAM RUDOLPH DUERRE, of 15 Kings Road, Chelsea, in the
County of Middlesex, Watch and Clock Maker, do hereby declare the nature of my
said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF TANDEM SOCIABLE
TRICYCLES," 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 my invention is to construct Tandem Sociable Tricycles in an
improved manner.
-:
My improved Tandem Tricycle is fitted with two large front wheels, and one
smaller bind steering wheel. The back bone is so formed as to resemble the
letter T, the head of the T being horizontal and placed a short distance above
the main axle, and parallel therewith, to which the main axle is attached by
brackets or other suitable means. To this T piece the two carriers for the pedals
are attached, one pair of pedals being placed in front of the head of the T piece,
and the other pair about midway between the front (main) axle and the steering
wheel. Each pair of pedals drives a chain wheel, and each of these chain wheels
is geared to a chain wheel fitted to the main axle, which is actuated thereby.
The main axle is fixed in the hub of one of the large wheels, but runs sufficiently
free in the hub of the other large wheel to enable the tricycle to work round
curves with facility, and is of a sufficiently close fit to furnish the necessary friction
for driving the free wheel when the tricycle is going in a straight line.
Above the back bone the seats for the riders are fitted to telescopic standards,
with the usual springs and adjusting screws, there being sufficient distance between
the front and back seats to enable the riders to sit comfortably; the front seat
being fitted for the accommodation of either a Lady or Gentleman.
The steering gear is placed in front of the hind rider, and the brake gear is
attached thereto.
A pair of handles are fitted for the accommodation of the person sitting on the
front seat, by holding which steadiness is secured while working the pedals or
merely sitting still.
The steering wheel is mounted in a fork in the usual manner, with a tiller head.
And in order that my said invention may be more particularly described and
ascertained, reference is hereby made to the accompanying drawings, 'in which
similar letters of reference indicate corresponding parts.
に
Fig. 1 is an elevation, and Fig. 2 a plan, shewing my improvements. a is the
driving wheel, which is made fast to the driving axle. a' is a wheel of the same
diameter as a The wheel a¹ is made to turn on the axle by, the friction of a flange
and nuts, by which means the wheel a¹ travels with the axle, when running in a
straight line, and the friction is overcome when turning curves. b is the back
bone, to which the T piece c is fixed, and below the back bone the main axle is
fixed by brackets, as shewn. The handles d d are placed for the convenience of
the front rider, and are adjustable as to height, but are otherwise immovable. The
hind rider steers the tricycle by means of the steering bar e and standard e¹ to the
cross bar e of which the rods ff are attached, which actuate the steering wheel g.
The rods ff being crossed, the steering is rendered analogous to that of an ordinary
7
1

page_text: bicycle. The lever h is
wards by the spring k.
the lever h, the rod
capable of raising a sliding nut i, which is pressed down-
The rod is fixed to the sliding nut, and, when raised by
applies the brake by means of the lever m. Fig. 3 is a
diagram shewing the steering bar e, spring k, sliding nut i, and rod e', and
contiguous parts.
.
The remaining parts of the tricycle are of ordinary construction, and do not
require any special description.
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 the construction of tandem sociable tricycles, of the description aforesaid, the
method of actuating the driving wheels, by fixing one of such wheels to the axle,
and driving the other wheel by means of the friction arising from a flange and
nuts substantially as herein before described and shewn on the drawings.
GEO. DOWNING,
Agent for Applicant.