IMPROVEMENTS IN TAMWAVO AND DAM CARDIACE WHEEL.
Year: 1871

page_text: LETTERS PATENT to Christopher Bagot Lane, of Great George Street,
in the City of Westminster, Civil Engineer, for the Invention
of IMPROVEMENTS IN TAMWAVO AND DAM CARDIACE WHEEL. "
PROVISIONAL SPECIFICATION left by the said Christopher Bagot
Lane at the Office of the Commissioners of Patents, with his
Petition, on the 29th July 1871.
I, CHRISTOPHER BAGOT LANE, of Great George Street, in the City
of Westminster, Civil Engineer, do hereby declare the nature of my
said Invention for " IMPROVEMENTS IN TRAMWAYS AND TRAM CARRIAGE
WHEELS," to be as follows:-
This Invention consists in an arrangement of the permanent way for
tramways, whereby the great objection to them from their liability
to retain or jar in passing over them the wheels of ordinary carriages
is obviated.
And the Invention also consists in the formation of a tyre of a
peculiar nature for the purpose of being employed on my improved
tramway.

page_text: In place of making a rail with a deep sharp rut as at present for the
purpose of receiving the flange of the tyre of the ordinary tram carriage,
I employ a rail of a simply grooved section having a depression
sufficient to receive the wheel of the tram carriage, but not sufficiently
sharp or wide to cause any considerable obstruction to the wheels of
ordinary carriages passing over such rail whether such carriages are
passing longitudinally or transversely.
The improved tram carriage wheel consists of a wheel with a tyre
without a flange, but having on or about the centre of its periphery
a projection intended to work within the groove of my improved tram
rail.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Christopher Bagot Lane in the Great Seal Patent
Office on the 20th January 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHRISTOPHER
BAGOT LANE, of Great George Street, in the City of Westminster, Civil
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of July, in the year
of our Lord One thousand eight hundred and seventy-one, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Christopher Bagot Lane, Her special license
that I, the said Christopher Bagot Lane, my executors, administrators,
and assigns, or such others as I, the said Christopher Bagot Lane, my
executors, administrators, or assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
TRAMWAYS AND TRAM CARRIAGE WHEELS," upon the condition (amongst
others) that I, the said Christopher Bagot Lane, my executors or
administrators, by an instrument in writing under my hand and seal,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the
same to be filed in the Great Seal Patent Office within six calendar

page_text: ТопыS next and immediately after the date of the Saru ՆԵԼՆԵՐՏ
Patent.
NOW KNOW YE, that I, the said Christopher Bagot Lane, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Drawing and to the letters and figures marked thereon, that is to
say:―
My said Invention consists in an arrangement of the permanent way
for tramways, whereby the great objection to them from the liability.
to retain or jar in passing over them the wheels of ordinary carriages
is obviated.
And the Invention also consists in the formation of a tyre of a
peculiar nature for the purpose of being employed on my improved
tramway.
In place of making a rail with a deep sharp rut as at present for the
purpose of receiving the flange of the tyre of the ordinary tram carriage
wheel, I employ a rail of a simply grooved section having a depression
sufficiently deep to receive the guiding projecting rim of the wheel
of the tram carriage, but not sufficiently wide or sharp at the edges
to present any considerable obstruction to the wheels of ordinary
carriages, whether passing longitudinally or transversely over such
rails.
The improved tram carriage wheel to be used in connection with the
improved rail consists of a wheel the tyre of which in lieu of having
the usual flange formed thereon is provided with an annular projection,
which is intended to work within the groove of my improved tram rail,
the said annular projection being situate at or about the centre of the
width of the tyre so as to form a double tread, the wheel bearing surface
of the rail being situate on both sides of the guiding groove.
The accompanying Drawing represents a transverse vertical section
of my improved form of tramway rail, and of the improved tyre to be
used therewith.
A is the rail having a central longitudinal guiding groove a formed
thereon, the sides or upper edges of which groove in lieu of being
vertical are rounded as shown at b, b; B is the wheel flange; and c
is the central annular and circumferential projection of a section

page_text: corresponding to that of the groove a, but rather smaller so as not
entirely to fill the same; d, d, represent the two contact surfaces
between the wheel and rail, situate one on each side of the guiding
groove a.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that what I consider
to be novel and original, and therefore claim as the Invention secured
to me by the herein-before in part recited Letters Patent is,-
First. The peculiar form or construction of rail for tramways, as
herein-before described and illustrated by my Drawing.
Second. The peculiar form or construction of tyre for the wheels
of tramway carriages, as herein-before described and illustrated by my
Drawing.
Third. The use of the peculiar form of tramway rail in combination
with the peculiar form of tyre as and for the purpose herein-before
described and illustrated by my Drawing.
In witness whereof, I, the said Christopher Bagot Lane, have to
this my Specification set my hand and seal, this Sixth day
of January, One thousand eight hundred and seventy-two.
D TANT