Year: 1887

page_text: Date of Application, 10th Dec., 1887
Complete Specification Left, 10th Sept., 1888
Complete Specification Accepted, 16th Nov., 1888
05
I, JONAS DAVIS, of Myrtle House, Moorfields, St. George, near Bristol, engineer,
do hereby declare the nature of this invention to be as follows:-
In machines as hitherto constructed for bending tyres for the wheels of road vehicles
one of the three rolls employed therein is caused to rotate by the tyre as the latter
bears upon it in passing through the machine, an arrangement under which slipping
between the roll and the tyre prevails.
Now under this invention all the rolls are rotated by means of toothed gearing, and
slipping is thus prevented.
Keyed upon the same centre as the radiating arm by which the degree of curvature
imparted to the tyres is controlled, is a pinion which is in gear with the spur wheel by
which the front and adjustable roll is rotated. As the radiating arm is raised or
lowered, the said spur wheel runs round on the pinion upwards or downwards and is
always in gear therewith.
The other rolls of the machine are rotated by toothed wheels suitably arranged for
that purpose.
A second improvement comprised in this invention consists in making each roll
parallel throughout, that is to say, without necks or journals of different diameter to
the body of the roll. By so doing the frame in which the rolls are supported may be
cast in one piece instead of being composed of two or more parts bolted or otherwise
secured together. The uppermost roll is movable and is readily withdrawn at one
side for placing a tyre in the machine or for removing a tyre therefrom.
At their ends the rolls work in roller bearings the rollers being arranged around the
rolls in recesses formed therefor in the frame.
Dated this 10th day of December A.D. 1887.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: I, JONAS DAVIS, of Myrtle House, Moorfields, St. George, near Bristol, engineer,
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:-
In machines as hitherto constructed for bending tyres for the wheels of road vehicles,
one of the three rolls employed therein is caused to rotate by the tyre as the latter
hears upon it in passing through the machine, an arrangement under which slipping
between the rolls and the tyre prevails.
Now, under this invention, all the rolls are rotated by means of toothed gearing,
and slipping is thus prevented.
Keyed upon the same centre as the radiating arm by which the degree of curvature
imparted to the tyres is controlled, is a pinion which is in gear with the
spur wheel by
which the front and adjustable roll is rotated. As the radiating arm is raised or
lowered, the said spur wheel runs round on the pinion upwards or downwards and is
always in gear therewith.
The other rolls of the machine are rotated by toothed wheels suitably arranged for
that purpose.
A second improvement comprised in this invention consists in so fitting the rolls
in the frame as to enable the latter to be cast in one picce instead of being, as hereto-
fore, composed of separate parts bolted or otherwise. secured together.
In the provisional specification lodged with my application for Letters Patont to
this invention the rolls are described as being parallel throughout. The use of such
rolls has, however, been found in practice to be attended with much friction in the
bearings, and the roller bearings referred to in tuy said Provisional Specification have
been found costly.
I prefer, therefore, to form necks or journals on the ends of the rolls and to apply
bush bearings thereto after insertion of the rolls in the frames. By this means I am
still enabled to employ a frame cast in one piece and so to retain the desired rigidity
thereof.
Referring to the accompanying sheets of drawings, Fig. 1 represents an elevation
of one side of a tyre bending machine constructed and arranged in accordance with
this invention. Fig. 2 is a plan, and Fig. 3 a front elevation of the machine. Fig. 4
represents a vertical section on the line xx, Fig. 3.
Keyed upon the spindle c, about which the radiating arm a moves as a centre, is a
pinion b gearing with the spur wheels d and e. The spur wheel d is keyed on one end

page_text: of the front and adjustable roll f carried in the radiating arm a. The spur wheel e is
keyed on the roll g carried in bearings at each side of the frame h of the machine the
pedestal of which is not shown in the drawings.
On the uppermost roll m is keyed the spur wheel which gears with the spur
wheel k on the end of the roll g opposite to the spur wheel e.
The roll m is withdrawn after each tyre is bent for the purpose of removing the
tyre, as is well understood. For this purpose a hands is provided beyond the spur
wheel 1.
As the radiating arm a is raised or lowered on the spindle c for the purpose, as is
well understood, of adjusting the roll f in relation to the rolls g and m according to
the diameter to which a tyre is to be bent, the spur wheel d turns about the pinion b
and is always in gear therewith.
The radiating arm a is operated by means of the screw i working in the cylindrical
nut j.
For bending tyres of the heavier kind the adjustable handle n is applied to the
boss o into which passes one of the necks of the rolls g. On the inner end of the
socket o is cast the pinion p gearing with the spur wheel g keyed on the spindle cand
outside the pinion b. The pinion p and boss o run loosely upon the end of the roll,
the pinion being prevented from getting out of gear with the spur wheel 9 by the
pin p¹ the inner end of which takes into a groove formed around the end of the roll,
but which pin does not impede the rotation of the pinion p.
Accordingly, motion is transmitted through the handle n to the loose pinion p and
spur wheel 7, thence by the pinion to the spur wheels d and e and rollers and g,
the roll m being driven by the spur wheel gearing with the spur wheel. The whole
constitutes a compound arrangement of driving gear.
For bending tyres of a lighter kind, the handle is transferred to the socket r
formed at one end of the spindle c to which it is secured by the binding screw ¹.
The pinion is thus driven directly instead of through the pinion p and spur
wheel
It will be seen that all the rolls are rotated by means of gearing, neither being
rotated by the passage over it of the tyre. Hence, slipping does not occur even with
wet or greasy tyres.
In order to obtain a frame cast in one piece, and thus to secure rigidity therein, the
apertures for the reception of the rolls g and m are of a diameter sufficiently in
excess of that of the body of the roils as to enable the latter to be inserted at one
side and passed through to the other. To the necks or journals of the said rolls are
applied the flanged bearings t. Similar bearings are applied to the necks of the front
roll and are secured to the radiating arm a by screws. The bearings of the roll
and the left-hand bearing of the roll in are secured to the frame by screws. The
right hand bearing of the roll m is, however, not secured by screws but is kept
stationary while the roll is in place in the machine by a pin which extends from the
flange of the bearing and enters a recess in the frame h. The bearing is withdrawn
with the roll.
g
Having now particularly described and ascertained the nature of this Inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is :-
1. In a machine for bending tyres for road vehicles, the employment of toothed
gearing for rotating each roll, substantially as hereinbefore described.
2. In a machine for bending the tyres of road vehicles, the provision of a pinion
centred on the spindle of the radiating arm, whereby, when the arm is raised or
lowered, the spur wheel of the upper and movable roll is always in gear with the
said pinion, substantially as herein before described.
3. In a machine for bending the tyres of road vehicles the use, for operating the
radiating arm, of a screw such as land cylindrical nut such as i, as herein before
described and shown in the accompanying drawings.

page_text: 4. In a machine for bending the tyres of road vehicles, the use of a frame
cast in one piece, as hereinbefore described with reference to the accompanying
drawings.
5. In a machine for bending the tyres of road vehicles, the use of flanged bush
bearings, such as t applied to the necks of the rolls after the latter have been placed
in the frame, substantially as herein before described.
6. The combination of parts constituting the improved machine for bending the
tyres of road vehicles, constructed, arranged and operating, substantially as herein
before described.