A NEW OR IMPROVED RAILWAY WHEEL
Year: 1877

page_text: LETTERS PATENT to Robert Turnbull, William Oliver, and Thomas Lockie,
all of Edinburgh, in the County of Mid Lothian, North Britain, for the Inven-
tion of "A NEW OR IMPROVED RAILWAY WHEEL."
ealed the 17th April 1877, and dated the 13th January 1877.
PROVISIONAL SPECIFICATION left by the said Robert Turnbull, William
Oliver, and Thomas Lockic at the Office of the Commissioners of Patents on
the 13th January 1877.
ROBERT TURNBULL, WILLIAM OLIVER, and THOMAS LOCKIE, all of Edinburgh, in
the County of Mid Lothian, North Britain. "A NEW OR IMPROVED RAILWAY
WHEEL."
This Invention, which relates to a new or improved railway wheel, has for its
object the production of such wheels with a rigid structure and 'with economy of
cost.
The new or improved wheel consists of a metallic boss or central portion around
which are flanges or circular webs whose distance apart is equal to the thickness or
width of corresponding flanges or webs at the interior or inner side of the tyre.
To connect the boss or central portion and the tyre or exterior portion of the
wheel together circular plates are provided, whose outer diameter corresponds with
the diameter of the recess in each side of the tyre, and a hole in the centre of each
of which corresponds with the diameter of those portions of the boss situate imme-
diately next to the central projections or flanges thereon.
Those portions of the wheel, namely the recesses in the tyres, the boss and plates
which when they are put together bear upon one another, are bored and turned, so
that they may fit accurately to one another, and that with a sufficiency of tightness
as to require the aid of an hydraulic or other press to force them together. At each
side of the centre or boss and bearing upon or against the circular plates is a ring
or washer which is preferably shrunk on hot. Analogous rings may also be placed
round the inner sides of the tyres, that is to say, at the outer sides of the circular
plates.
When the several parts of the wheel are put together in the manner herein-before

page_text: described rivets or bolts are passed through holes in the several parts at the centre,
and those at the inner side of the tyre for the purpose of rigidly binding the
whole.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Turnbull, William Oliver, and Thomas Lockie in the Great
Seal Patent Office on the 12th July 1877.
ROBERT TURNBULL, WILLIAM OLIVER, and THOMAS LOCKIE, all of Edinburgh, in
the County of Mid Lothian, North Britain. "A NEW OR IMPROVED RAILWAY
WHEEL."
Our said Invention, which relates to a new or improved railway wheel, has for its
object the production of such wheels with a rigid structure and with economy of
cost.
The new or improved wheel consists of a metallic boss or central portion, around
which are flanches or circular webs whose distance apart is equal to the thickness
or width of corresponding flanches or webs at the interior or inner side of the
tyre.
To connect the boss or central portion and the tyre or exterior portion of the
wheel together circular plates are provided, whose outer diameter corresponds with
the diameter of the recess in each side of the tyre, and a hole in the centre of each
of which corresponds with the diameter of those portions of the boss situate imme-
diately next to the central projections or flanches thereon.
Those portions of the wheel, namely the recesses in the tyres, the boss and plates
which when they are put together bear upon one another, are bored and turned, so that
they may fit accurately to one another, and that with a sufficiency of tightness as
to require the aid of an hydraulic or other press to force them together. At each
side of the centre or boss and bearing upon or against the circular plates is a ring
or washer which is preferably shrunk on hot. Analogous rings may also be placed
round the inner sides of the tyres, that is to say, at the outer side of the circular
plates.
When the several parts of the wheel are put together in the manner herein-
before described, rivets or bolts are passed through holes in the several parts at the
centre, and those at the inner side of the tyre for the purpose of rigidly binding the
whole.
And in order that our said Invention may be properly understood, we now proceed
more particularly to set forth the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, reference being had to the
annexed Sheet of Drawings and to the letters and figures marked thereon, that is
to say:-
Figure 1 is a side elevation of a railway wheel as constructed in accordance with
our said Invention, with part thereof broken out in order to show the interior
structure; and Figure 2 is a vertical section of the same.
The new or improved wheel consists of a metallic boss or central portion a which
is provided with flanches or circular webs b, whose distance apart is equal to the
thickness or width of other corresponding flanches or webs c at the interior or inner
side of the tyre d. The boss or central part a and the tyre or exterior portion d of
the wheel are connected together by two circular plates e, whose outer diameter
corresponds with the inner diameter of the tyre d at those portions situate imme-
diately next to the flanches or webs c thereon. The holes in the centre of the
plates e correspond with the diameter of those portions of the boss a situate imme-
diately next to the flanches or webs b thereon, and those portions of the wheel,
namely, the inner diameter of the tyre d, and outer diameter of the boss a situate
immediately next to the flanches or webs c, and those portions of the circular plates e
which bear thereon are turned and bored so that they shall fit accurately to one

page_text: another, and that with such a tightness as to require the aid of an hydraulic or other
press to force them together. At each side of the boss or central portion a of the
wheel is a ring or washer f, preferably tight fitting, which when put on the wheel
is heated sufficiently to cause it to expand in order that it may be easily put in its
place on the boss. When the said rings or washers f cool they contract, and thereby
secure the circular plates e against the flanches or webs b of the boss a. Rings g
are also applied for securing the plates e the more effectually to the tyre d. When
the several parts of the wheel have been put together in the manner herein-before
described they are rigidly bound as a whole by means of rivets or bolts h which pass
through holes in the flanches b, c, plates e, and rings f, g.
A variation or modification in the constructing of the new or improved wheel in
accordance with our said Invention in order that the tyre d and boss or central
portion a may be more rigidly bound together to prevent them from separating in
the event of fracture is illustrated at Figures 3 and 4 of the Drawings, Figure 3
being a side elevation of the wheel with a part of one of the circular plates and
rings fand g broken off, and Figure 4 a vertical section of the same.
The boss or
central portion a and the tyre d of the wheel are formed in this case with circular
grooves or recesses i. Into these grooves i the edges of the plates e (which are
thicker at those parts than in the middle) are fitted. The wheel is in all other
respects, and the manner of putting the parts together, the same as that herein-
before described and illustrated by Figures 1 and 2 of the Drawings.
Having now described and particularly ascertained the nature of our said Inven-
tion, and the system, mode, or manner in or under which the same is or may be used
or practically carried into effect, we would observe in conclusion that what we
consider to be novel and original and therefore claim as the Invention secured to
us by the herein-before in part recited Letters Patent is, the railway wheel, con-
structed as herein-before described and shown upon the annexed Sheet of
Drawings.
In witness whereof, we, the said William Oliver and Thomas Lockie, have
hereunto set our hands and seals, this Ninth day of July, in the year of
our Lord One thousand eight hundred and seventy-seven.
WILLIAM OLIVER. (L.S.)
THOMAS LOCKIE.
(L.S.)