Year: 1887

page_text: I, GEORGE DOUGLAS LEECHMAN of 17 Manor Park Road Harlesden in the county
of Middlesex, Manager of Works do hereby declare the nature of this invention to be
as follows:-
-From
My invention relates to improvements in the framework or frame of a tricycle,
whereby I obtain greater rigidity with less torsional strain and consequently greater
ease of propulsion. I construct my improved frame in the following manner :-
each end of the cross tube carrying the bearings of the driving axle a tube extends
horizontally forward and curves round to the centre of the machine. The two tubes
here are fixed together and carry the neck or socket for the steering head. Instead
of making this curved part of the frame out of two pieces of tube
may be made out
of one piece bent to the desired shape. From the cross tube carrying the driving axle
a pair of tubes run forward and downward to carry the pedal crank axle bearings, and
then upward to join the front of the curved horizontal tube herein before described.
These two tubes run preferably parallel with each other throughout their whole
length.
The steering wheel is mounted in the usual raked fork which is extended upwards
as a steering post to carry a transverse handle bar, the said post being constructed to
receive the neck or socket on the front of the curved horizontal tube of the main frame
to form the steering head joint.
When side steering is used 1 mount the vertical spindles carrying the lateral
handles on a convenient part of the curved horizontal tube-well in front of the saddle
-and I connect one or both of the said spindles with the head of the fork carrying
the steering wheel by a rack and pinion gear of the well known type. In this case
the fork of the steering wheel is preferably set vertical or approximately so, the neck
being carried on a short backbone running forward from the front of the curved
horizontal tube on the main frame.
D
·ה.
1
AL
L
1007
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
Royal Courts Chambers,
70-72, Chancery Lane, London, W.C.,
Agent for the Applicant."

page_text: I GEORGE DOUGLAS LEECHMAN of 17 Manor Park Road, Harlesden, in the county
of Middlesex, Manager of Works, 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 :-
My invention relates to improvements in the framework or frame of a tricycle,
whereby I obtain greater rigidity with less torsional strain and consequently greater
ease of propulsion.
I construct my improved frame in the following manner :-From each end of the
cross tube carrying the bearings of the driving axle, a tube extends horizontally, or
approximately horizontally, forward and curves round to the centre of the machine.
The two tubes are here fixed together to carry the neck or socket for the steering
head. Instead of making this curved part of the frame out of two pieces of tube it
may be made out of one piece bent to the desired shape. From the cross tube carrying
the driving axle a pair of tubes run forward and downward to carry the pedal-crank
axle bearings, and then upward to join the front of the curved horizontal tube or tubes
hereinabove described. These two tubes run preferably parallel with each other
throughout their whole length. The steering wheel is mounted in the usual raked
fork, which is extended upwards as a steering post to carry the transverse handle bar,
the said post being constructed to receive the neck or socket, on the front of the curved
horizontal tube or tubes forming the main frame, to form the steering head or joint.
When side-steering is used I mount the spindles carrying the spade handles on a
convenient part of the curved horizontal tube-well in front of the saddle-and I
connect one or both of the said spindles with the head of the fork carrying the
steering wheel, by a rack and pinion gear of the well-known type. In this case the
fork carrying the steering wheel, may if desired, be set vertical or approximately so,
in which case the neck may be carried on a short backbone running forward
horizontally from the front part of the curved part of the main frame.
In order that my invention may be fully understood I will more particularly
describe it making reference to the accompanying drawing, in which Figure 1 is a
view in side elevation of a tricycle fitted with my improved frame, and Figure 2 is
a view of the frame in plan, with all the parts besides the driving axle and wheels
removed for the sake of distinctiveness.
Throughout these views similar parts are marked with like letters of reference.
My improved frame consists of a straight cross tube A. carrying lugs a a etc. for
the bearings of the driving axle X. carrying the driving wheels Z. Z. From each
end of the cross tube A. a curved tube A¹ in one or two pieces, as found most
convenient in practice, extends horizontally, or approximately horizontally, forward
and carries a neck a¹ to form part of the steering joint or head. From about the
centre of the cross tube A. two light tubes A2 A2 extend forward and downward to
support the bearings for the pedal crank axle Y. and thence forward and upward to

page_text: join the front part of the curved tube A¹. These two tubes are braced together by
a strut a² at their lowest position. A tube A³ rises from the centre of the cross
tube A, to carry the seat pillar. The steering wheel W. is mounted in the usual
fork V. extending upward as a steering post V' to carry the transverse steering
handle bar V2. On the steering post VI are lugs v v carrying centres to receive the
neck a¹ to complete the steering head or joint.
When side-steering is used the steering spindles are mounted in the manner shown
in dotted lines on Figure 1, and are connected with the fork carrying the steering
wheel by a rack and pinion gear in the well-known manner.
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 a tricycle the particular construction of framework or frame carrying the
driving wheels, pedal-crank axle, and the seat, specifically as hereinabove described,
and illustrated by the accompanying drawing.
2. In a frame for a tricycle the combination of the cross tube A. the horizontally,
or approximately horizontally, curved tube A¹, and the duplex tubes A² A² connecting
the front part of the curved tube A¹ with the cross tube A, and adapted to carry
the pedal-crank axle, as set forth.
3. In a frame for a tricycle, connecting the neck or socket to the cross tube
supporting the bearings of the driving axle, by means of two curved tubes arranged
horizontally, or approximately horizontally, and carrying the bearings of the pedal-
crank axle on a pair of tubes placed parallel with each other and forming two sides of
a double triangle the base of which is the horizontal curved tube, as set forth.
1000
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.Č.,
Agent for the Applicant.
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C.,
Agent for the Applicant.