Improvements in Tricycles.
Year: 1893

page_text: Date of Application. 11th Nov., 1893.
Complete Specification Left, 4th July, 1894-Accepted, 11th Aug., 1864
PROVISIONAL SPECIFICATION.
Improvements in Tricycles.
We; WALTER JOHN LLOYD and WILLIAM PRIEST, of The Quadrant Cycle
Company, Sheepcote Street, Birmingham in the County of Warwick, Velocipede
Manufacturers do hereby declare the nature of this invention. to be as follows:-
Our invention has for its object the ready and efficient adjusting of the tension
of the driving chains of tricycles and consists of the construction and arrangement
of parts hereinafter described for that purpose.
The bearing of the axle of the front or driving chain wheel is suspended from
the main tube of the framing, the said bearing being capable of a slight oscillating
motion on a centre on the said tube. The bearing of the axle of the rear or
principal wheels is also supported by the main tube but has no oscillating motion on
the said tube. The adjustment of the driving chain is effected by changing the
distance between the said two axles. To effect this we connect to the driving chain
wheel by means of a hinge or joint, two parallel connecting tubes which, extend
backwards nearly to the axle of the principal wheels. The rear ends of these
tubes are connected in the manner hereinafter described with a cross bridge the
ends of which are connected respectively to the bearings of the rear axle.. The
rear ends of these tubes receive pins or pegs sliding therein which pins or pegs are
jointed to the bridge described. In order to increase the distance between the axle
of the front or driving chain wheel and the axle. of the principal wheels the front
or driving chain wheel is pressed forward, its bearing. turning upon the centre. on
the main tube. The rear ends of the parallel tubes are thereby drawn more or less
from off the pins or pegs engaged in them and when the required tension of the
chain has been attained the position of the connecting pins or pegs in the rear
ends of the parallel tubes is secured by a fixing screw or other equivalent
fastening.
By the arrangement described the pressure produced by the tension of the
driving chain is borne by the two parallel tubes described without any pressure
whatever on the framing of the machine, the said pressure being, in the lines of the
axes of the said tubes which are in the same plane as the axles, of the chain and
principal wheels.
Dated this 11th day of November. 1893.
W. T. WHITEMAN,
Agent for the Applicants.
CUM LEID. SIEVITIVATION.
Improvements in Tricycles.
We WALTER JOHN LLOYD and WILLIAM PRIEST of The Quadrant Cycle
Company, Sheepcote Street, Birmingham in the County of Warwick, Velocipede
Manufacturers do hereby declare the nature of our invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement :-
Our invention has for its object the ready and efficient adjusting of the tension
of the driving chains of tricycles and consists of the construction and arrangement
of parts hereinafter described for that purpose.

page_text: The bearing of the axle of the front or driving chain wheel is suspended from
the main tube of the framing, the said bearing being capable of a slight oscillating
_ motion_on_a_centre-on-the-said-tube. The bearing of the axle of the rear or
principal wheels is also supported by the main tube but has no oscillating motion
on the said tube. The adjustment of the driving chain is effected by changing the
distance between the said two axles. To effect this, we connect to the driving
chain wheel by means of a hinge or joint, two parallel connecting tubes which
extend backwards nearly to the axle of the principal wheels. The rear ends of
these tubes are connected in the manner hereinafter described with a cross bridge
the ends of which are connected respectively to the bearings of the rear axle. The
rear ends of these tubes receive pins or pegs sliding therein, which pins or pegs
are jointed to the bridge described. In order to increase the distance between the
axle of the front or driving chain wheel and the axle of the principal wheels the
front or driving chain wheel is pressed forward its bearing turning upon
the centre
on the main tube. The rear ends of the parallel tubes are thereby drawn more or
less from off the pins or pegs engaged in them and when the required tension of
the chain has been attained the position of the connecting pins or pegs in the rear
ends of the parallel tubes is secured by a fixing screw or other equivalent.
fastening.
Figures 1 and 2 of the accompanying drawing represent in side elevation and
plan respectively a portion of a tricycle to which our improved driving chain
adjusting mechanism is applied; Figures 3, and 5 represent portions of the same
drawn to a larger scale as hereinafter described.
The same letters of reference indicate the same parts in the several figures of the
drawing.
a is the main tube of the frame of the tricycle under which the driving chain b
is situated and works and a' is the bridge or crossing part of the said frame; the
portion of the frame represented in Figure 1 is indicated in the plan Figure 2 by
dotted lines. The bearings of the axle c of the front driving chain wheel & are
suspended from the main tube a by the arms e, e which are pivotted by means of
the pins f,f to the bosses g, g on the main tube a of the frame (see Figure 5).
By this means the arms of the bearings of the front chain wheel d are capable of
an oscillating or angular motion on the pins f, which constitute a horizontal axis
(see the normal position of the chain wheel indicated in dotted lines in Figure 1)
whereby the distance between the said front chain wheel d and the rear chain
wheel on the main shaft or axle of the tricycle may be readily increased or
reduced for the purpose of adjusting the tension of the driving chain & passing over
the said chain wheels d, h.
The said front chain wheel d is maintained in its adjusted position by the stay
tubes k, k and pins or pegs 1, 1 shown separately on a large scale in Figures 3 and 4,
the said tubes k, k and pins or pegs 1, constituting telescopic stay rods. The
tubes k, kare binged or jointed at ³, to the bearing cases m, m of the front
driving chain wheel axle c and the pins or pegs 1, 1 are hinged or jointed,at 1, to
opposite ends of a bridge piece n fixed to the bearing cases p of the shaft or
axle on either side of the chain wheel h. The pins or pegs 1,1 work telescopically
in the rear ends of the tubes k, k and when the tension of the driving chain has
been adjusted by the angular motion in the required direction of the arms e, e the
said pins or pegs 1, 1 are fixed in the tubes k, k by the screw pins q, q Instead of
the screw pins 9, 9 other equivalent fastenings may be employed.
consequence of wear or from any other cause it is desired to readjust the tension on
the driving chain it is only necessary to unscrew the screw pins g, q sufficiently to
permit of the motion of the pins or pegs 1, 1 in the tubes k, and to pull the front
chain wheel d outwards until the desired tension on the driving chain b is obtained
when the parts are fixed in their readjusted position by driving home the screw
pins 9, 9 against the pins or pegs 1, 1.
When in
By the arrangement described the pressure produced by the tension of the
driving chain is borne by the telescopic stay rods described and represented without

page_text: any pressure whatever on the framing of the machine, the said pressure being in
the lines of the axes of the said telescopic stay rods, which are in the same plane.
as the axles of the driving chain and principal wheels.
C
The shafts and of the tricycle are provided with swivelling bearings of the
kind described, represented, and claimed in our Complete Specification No. 20988.
Year 1893.
Having now particularly described and ascertained the nature of our invention
and in what manner the same is to be performed we declare that we claim as.
our invention of "Improvements in tricycles,"-
-
The construction and combination of parts for adjusting the tension of the
driving chains of tricycles hereinbefore described and illustrated in the
accompanying drawing, that is to say, the combination with the front driving chain
wheel, so mounted in its bearings as to be capable of an oscillating or angular
motion on the tricycle frame, of adjustable stay rods connected with the bearings of
the axles of the front and rear driving chain wheels and situated in the same plane
as the said axles, by which said rods the whole pressure produced by the tension of
the driving chain is borne substantially as described and illustrated.
Dated the Twenty-ninth day of June 1894.
WALTER JOHN LLOYD.
WILLIAM PRIEST.