Year: 1898

page_text: We, ALBERT ISAAC MCCULLAII, of 202, Hill House, Brixton Hill, in the County of
Surrey, Secretary, and THOMAS WARD Cox, of 10, Wellington Mansions, Queen's Club
Gardens, Kensington, in the County of Middlesex, Manager, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to wheel rims adapted to carry pneumatic tyres in which the
cross section of said rims are altered by the application to them of bands or auxiliary
rims to adapt them to receive tyres of the "Trench" type, and it consists of a device
for drawing together the ends of the bands or auxiliary rims and to provide for the
continuity of the central circumferential ridge which keeps the edges of the tyre at
their respective sides of the rim.
In applying our invention to a rim of the "Welch" type we mount on such an auxiliary
rim-preferably made of aluminium--the cross section being such as will adapt it to
receive a tyre of the "Trench" type, the ends of auxiliary rim being drawn together
in the following manner :-The two ends of auxiliary rim are slotted longitudinally
to receive a right and left hand coupling nut, its ends being reduced to engage with
screwed hooks or their equivalents adapted to engage with eyes or slots formed in
blocks fixed to the underpart of each end of auxiliary rim thus allowing the ends to
be drawn together or unslackened.
The cross section of coupling nut at its centre-approximating to a star-shape-is
such that it provides for the continuity of the central circumferential ridge on
auxiliary rim and also forins a shoulder for base of tyre to rest on and practically fills
up the slots in ends of auxiliary rim when the same is drawn together. It will be
apparent that a right and left hand coupling screw may be used which will engage
with bridge pieces fixed to the underpart of each end of auxiliary rim. The coupling
nut, or screw, which is operated by a pin spanner, is provided with about four face sides
so that on a slight revolution it will still coincide with ridge.
We prefer to pass the valve stem attached to base of tyre through a hole
diametrically opposite to fastening device so as to further secure auxiliary rim to
existing wheel rim.
.... 0211
•
1000
ALBERT ISAAC MCCULLAH,
THOMAS WARD COX.

page_text: We, ALBERT ISAAC MCCULLAH, of 202, Hill House, Brixton Hill, in the County
of Surrey, Secretary, and THOMAS WARD Cox, of 10, Wellington Mansions, Queen's
Club Gardens, Kensington, in the County of Middlesex, Manager, do hereby declare
the nature of this invention, and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
Our invention relates to wheel rims adapted to carry pneumatic tyres in which the
cross section of said rims is altered by the application to them of bands or auxiliary
rims to adapt them to receive tyres of the "Trench" type, and it consists of a device
for drawing together the ends of the bands or auxiliary rims and to provide for the
continuity of the central circumferential ridge which keeps the edges of the tyre at
their respective sides of the rim.
In the accompanying drawing which illustrates this invention :-
Figure 1 is a view in transverse section.
Figure 2 is a view in broken longitudinal section, and
Figure 3 is a broken view in plan showing one method of carrying the invention
into practice with a rim adapted to carry a "Dunlop-Welch " pneumatic tyre.
Figures 4, 5 and 6 are similar views showing an alternative construction.
Figures 7, 8 and 9 are similar views showing a further modification of the
invention, and
Figure 10 is a view in transverse section showing the invention applied to a wheel
rim adapted to carry a tyre of the "Clincher" type.
66
Throughout the views similar parts are marked with like letters of reference.
Referring to Figures 1, 2 and 3, X designates a wheel rim adapted to carry a
Dunlop-Welch " pneumatic tyre and A designates the band or auxiliary rim adapted
to carry a "Trench Tubeless" pneumatic tyre, the said band or auxiliary rim having
inturned edges and a centrally arranged circunferential ridge a¹ to keep the feet or
divided edges of the tyre at their respective sides of the rim.
In each end of the band or auxiliary rim A is cut or formed a longitudinal slot a² and
across the band or rim at the base of each of the said slots is rivetted or otherwise fixed
a transverse piece B having a screw threaded hole lying longitudinally with the band or
auxiliary rim. The hole in one of these pieces is threaded with a right-hand thread and
the other with a left-hand thread to enable a right and left-handed screw C to engage
them whereby the ends of the band or auxiliary rim can either be drawn together or
forced apart according to the direction in which the said screw is turned.
At or about the centre of the length of the screw C is a head c preferably of a star or
rectangular shape so that its angle will correspond with the longitudinal ridge a¹ of
the band auxiliary rim and thus preserve its continuity. The head c is also provided
with transverse holes to enable the screw to be turned by means of a pin spanner or
its equivalent.
Instead of forming the screw C with right and left handed threads it may be pro-
vided with either a right or a left handed thread in which case it passes freely
through one of the transverse pieces B and screws into the other piece as shown by
Figures 4, 5 and 6.
Referring to Figures 7, 8 and 9. Instead of fixing transverse pieces B, B, to the
band or auxiliary rim A, the parts of the band cut out to form the slots a² may be
bent or turned back so as to form depending flanges D which are flattened and if
necessary strengthened in a suitable manner, in which case clearance holes are pro-
vided for the screw C, the ends of which engage with right and left-hand threaded
nuts E, E, located on the outer sides of the flanges D the exterior shape of the said nuts

page_text: being such as will cause them to engage with the recesses on the inner surface of the
band or auxiliary rim A formed by the projecting ridge a¹ on the outer surface thereof
whereby the said nuts are prevented from turning.
Referring to Figure 10, the band or auxiliary rim A has no inturned or incurved edges
as the inturned or incurved edges of the rim X are utilized, the band or auxiliary rim A
being only employed in this case to correct the shape of the bottom of the groove of the
rim.
In constructing these bands we prefer to fix tho transverse blocks B, B, or make the
depending flanges D, D, at such a distance apart as will allow the length of the band
or auxiliary rim to be shortened to enable it to be accurately fitted to the main rim X
of the wheel.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
(1) A band or auxiliary wheel rim for enabling a pneumatic tyre of one type to be
mounted in a wheel rim adapted to carry a pneumatic tyre of a different type, con-
structed, arranged, and adapted to operate, as specified.
(2) In combination with a wheel rim adapted to carry a pneumatic tyre of the
"Dunlop Welch " or other type, of a band adapted to form an auxiliary rim such
as A having inturned edges a and a centrally arranged longitudinal ridge a¹ and of
the means herein specified for drawing the ends of the said band together, as set
forth.
(3) In combination with a wheel rim adapted to carry a pneumatic tyre of the
"Clincher "type, of a band adapted to alter the section of the groove of the said rim
having a centrally arranged longitudinal ridge a¹ and of the means herein specified for
drawing the ends of the said band together, as set forth.
Dated this 26th dow of Annil 1900
ROBERT E. PHILLIPS, Assoc.M.Inst.C.E., M.I.Mech.E.,
Chartered Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicants.