IMPROVEMENTS IN THE CONSTRUCTION OF TRICYOLES
Year: 1883

page_text: LETTERS PATENT to William Jackson of N° 11 Caroline Street Eaton Square
in the County of Middlesex Manufacturer for an Invention of "IMPROVEMENTS
IN THE CONSTRUCTION OF TRICYOLES "
PROVISIONAL SPECIFICATION left by the said William Jackson at the
Office of the Commissioners of Patents on the 20th June 1883.
WILLIAM JACKSON of No 11 Caroline Street Eaton Square in the County of
Middlesex. Manufacturer IMPROVEMENTS IN THE CONSTRUCTION OF TRICYCLES.
The object of my invention is to construct improved tricycles, such improvements
comprising, compactness, lightness, handiness and cheapness.
I construct the framework of a horizontal bar and fork with two uprights and
the pedal cranks and axle fitted thereto, as shewn in the accompanying drawings,
Fig 1 being an elevation with one steering wheel removed; Fig. 2 is a plan of the
same with some of the upper parts removed; and Fig 3 is a front view of the
steering wheels, shewing the telescopic arrangement of the front axle.
a a is the horizontal portion of the frame to which the seat supporting bar b is
firmly fixed. At the front end of this bar the tube c is attached, at right angles
thereto, as shewn. The seat springs d and seat e are fixed, the forward end at f
being firmly fixed to c; there being a hole in d at g for the purpose of allowing
the spring to act freely and at the same time steady the same. h is the usual
cross-bar steering handle fitted to the bar i, which passes down through the tube c.
At c¹ the tube and bar are made conical to increase the steadiness. The lower end
of the bar i is fixed to the tubular axle k. The two front steering wheels are
fitted to the two axles ll upon which each wheel runs independently of the other;
and which axles slide in and out of the main tubular axle k the distance of the
steering wheels apart from each other being regulated by the set screws m'm,
which take into holes in the axles ll,―n n are the front steering wheels and o is
the driving wheel.
The driving gear consists of a short axle fitted to the bar a by the sliding

page_text: block p, the position being regulated by a set screw. This axle has the ordinary
pedals and a pitch chain and wheel as shewn. This chain gears into a pitch chain
wheel fitted to the axle of the driving wheel, and the diameters of the two pitch
chain wheels are arranged so as to suit the relative speed of rotation of the crank
axle to that of the driving wheel, the sliding block p being made to accommodate
a large or small pitch chain wheel to suit the requirements of the Rider.
I render the oil cups (not shewn in the drawing) self-acting, by placing a
conical pin in each in such a manner that the vibration of the tricycle causes a
small quantity of oil to pass to the portion lubricated, thus rendering the
lubrication automatic.
SPECIFICATION in pursuance of the conditions of the Lettors Patent, and of
an Order of the Lord Chancellor, filed by the said William Jackson in the
Patent Office on the 5th January 1884.
WILLIAM JACKSON of N° 11 Caroline Street Eaton Square in the County of
Middlesex Manufacturer IMPROVEMENTS IN THE CONSTRUCTION OF TRICYCLES
The object of my invention is to construct improved tricycles such improvements
comprising compactness, lightness, bandiness and cheapness
I construct the framework of a horizontal bar and fork with two uprights and
the pedal cranks and axle fitted thereto as shown in the accompanying drawings
wherein similar. letters of reference indicate corresponding parts-Fig. 1 is an
elevation with one steering wheel removed Fig 2 is a plan of the same with some
of the upper parts removed and Fig 3 is a front view of the steering wheels
(partly in section) shewing the telescopic arrangement of the front axle and the
steering handle, the dotted lines shewing the wheels extended
a a is the horizontal portion of the frame to which the seat supporting bar b
is firmly fixed At the front end of this bar the tube c is attached at right angles
thereto or thereabouts as shewn. The 'seat spring & and seat e are fixed, the
forward end at fis firmly fixed to c as shewn and there is a hole in d at g for the
purpose of allowing the spring to act freely and at the same time steady
the upright c, h is the usual cross-bar steering handle fitted to the bar i which
passes down through the tube c-At c' the tube and upright bar are made conical
to increase the steadiness. The lower end of the bar is fixed to the tubular
axle The two front steering wheels are fitted to the two axles ZZ upon which
cach wheel runs independently of the other and which axles are made to slide in
and out of the main tubular axlo k the distance of the steering wheels apart from
each other being regulated by the set screws mm which take into holes in the
axles l. lnn are the front steering wheels and o is the driving wheel
The driving gear consists of a short axle fitted to the bar a by the sliding
block p the position being regulated by a set screw. This axle has the ordinary
pedals and a pitch chain and wheel as shewn. This chain gears into a pitch chain
wheel fitted to the axle of the driving wheel and the diameters of the two pitch
chain wheels are arranged so as to suit the relative speed of rotation of the crank

page_text: axle to that of the driving wheel, the sliding block p being made to accommodate
a large or small pitch chain wheel to suit the requirements of the Rider the block
being shifted as required
-
I render the oil cups self-acting by placing a conical pin in each in such a
manner that the vibration of the tricycle causes a small quantity of oil to pass to
the portion lubricated thus rendering the lubrication automatic
Having now particularly described and ascertained the naturo of my said
invention and in what manner the same is to be performed I declaro that what I
claim is
1 The construction of tricycles the arrangement of two free running steering
wheels fitted with axles and with or without a telesopic arrangement for reducing
the width and a steering handle attached to the tube substantially as described and
shewn on the drawings
2 The general combination and arrangement of the several parts together forming
my improvements in the construction of tricycles substantially as herein before
described and shewn on the drawings
In witness whereof I the said William Jackson have hereunto set my hand and
seal this fifth day of January in the year of our Lord One thousand eight
hundred and eighty four
WILLIAM JACKSON (L.S.)