IMPROVEMENTS IN SECURING THE WHEELS OF PIT CORVES, COLLIERY WAGONS, AND OF OTHER SIMILAR VEHICLES TO THEIR AXLES
Year: 1879

page_text: LETTERS PATENT to George Henry Dixon, of Sheffield, in the County of
York, for the Invention of "IMPROVEMENTS IN SECURING THE WHEELS OF
PIT CORVES, COLLIERY WAGONS, AND OF OTHER SIMILAR VEHICLES TO
THEIR AXLES."
Sealed the 6th April 1880, and dated the 10th October 1879.
PROVISIONAL SPECIFICATION left by the said George Henry Dixon at the
Office of the Commissioners of Patents on the 10th October 1879.
GEORGE HENRY DIXON, of Sheffield, in the County of York. "IMPROVEMENTS
IN SECURING THE WHEELS OF PIT CORVES, COLLIERY WAGONS, AND OF OTHER
SIMILAR VEHICLES TO THEIR AXLES."
This Invention has for its object securing the wheels of pit corves, colliery
wagons, and of other similar vehicles, to their axles in such a simple manner that
they may be readily disengaged and replaced without the aid of skilled labour, and
we attain this object in the following manner:-
In carrying out my Invention as applied to the wheels and axles of colliery
wagons or corves, for example, the wheels by preference being made of cast steel,
and intended to be secured to and revolve with the axle, I construct the boss of
the wheel with two projecting lugs or ears, one of which may form part of one of
the arms of the wheel. The narrow space left between the lugs or cars is continued
and cuts through the thickness of the boss right into the centre hole, and a suitable
bolt and nut is arranged to pass through the lugs for the purpose of nipping them
together. Where round axles are used the boss of the wheel is bored out so as to
pass easily over the turned ends of the axle, the larger diameter of the unturned
part forming a shoulder, against which the wheel is placed, and by screwing up the
before mentioned bolt and nut the lugs are drawn together, and the centre hole is
reduced in diameter, causing it to grip the axle with great power, and securely
holding the wheel in its place. If found desirable a pin, cotter, washer, or
equivalent device may be used to prevent the wheel coming off endwise should it
by any means become loose. My Invention is also applicable to shafts or axles
having a square, octagon, or similar cross section.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said George Henry Dixon in the Great Seal Patent Office on the
9th April 1880).
GEORGE HENRY DIXON, of Sheffield, in the County of York.
"IMPROVEMENTS
IN SECURING THE WHEELS OF PIT CORVES, COLLIERY WAGONS, AND OF OTHER
SIMILAR VEHICLES TO THEIR AXLES."
The said Invention has for its object securing the wheels of pit corves, colliery
wagons, and other similar vehicles to their axles in a simple and efficatious manner,
and so that they may be readily disengaged or replaced without the aid of skilled
labour.
In carrying out my Invention as applied to the wheels of colliery wagons or
corves, for example, the wheels by preference being made of cast steel, I construct
the boss of the wheel with a space cutting completely through it into the centro
hole, one of the arms of the wheel being on one side of the space, and a pro-
jection or lug on the other. A suitablo bolt and nut passes through the arm and
the lug for the purpose of drawing the two together, and thereby contracting the
centre hole, thus causing it to grip the axle with great power.
If desirable a pin, cotter, washer, keyplate, or other equivalent device may be
used in addition to the bolt and nut to prevent the possibility of any movement of
the wheel on the axle. And in order that my said Invention may be fully under-
stood, I shall now proceed more particularly to describe the same, and for that
purpose shall refer to the several Figures on the annexed Sheet of Drawings, the
same letters of reference indicating corresponding parts in all the Figures.
Fig. 1 represents a casting of a corve wheel made according to this Invention,
showing the space or opening that cuts through the boss into the centre hole, and is
intended for a round axle.
Fig. 2 represents the same wheel, fitted with a keyplate intended to be let into a
recess formed in the axle, and secured by the bolt and nut.
Fig. 3 represents a round axle fitted with two wheels, one of the wheels being
shown in section to exhibit the keyplate; the end of the axle is also in section to
show the recess or keyway.
Fig. 4 represents the keyplate.
Fig. 5 represents the bolt and nut.
A is the centre hole of the wheel, B is the boss cut through by the space C. D
is the projecting lug, through which and the arm the bolt E passes. F is the recess
or keyway formed in the axle G into which the keyplate H fits. J is the end of
the shaft shown in section.
Although I have only described my improved method as applied to securing
wheels upon a round axle, it is equally applicable to axles having a square, octagon,
or other similar cross section.
I am aware that pulleys or drums (known as "split pulleys") have been made
with the boss split completely in two parts for the convenience of placing them
upon a shaft already fixed in its place, so as not to have to remove the shaft from
its position or disturb other pulleys.
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 manufacture and use of wheels for pit corves,
colliery wagons, and other similar vehicles having a boss which is divided or cut
through from the outside into the centre hole, leaving a sufficient space, so that by
means of one or more bolts or screws or similar means the centre hole may be con-
tracted upon the axle and caused to grip it with great power; secondly, I claim

page_text: in conjunction with the above arrangements the use of a keyplate, or its equivalent,
by preference placed in the space between the lug and the arın, and fitting into a
recess or keyway formed in the axle for the purpose of rendering any movement
(either lateral or rotary) of the wheel impossible, substantially as described and
illustrated.
In witness whereof, I, the said George Henry Dixon, have hereunto set my
hand and seal, this Second day of April, in the year of our Lord One
thousand eight hundred and eighty.
GEORGE H. DIXON. (L.S.)