AN IMPROVED STEAM ADDERGADED IN A TRACTION ENGINE AND PORTABLE ENGINE
Year: 1867

page_text: LETTERS PATENT to William Thomas Carrington, of Perth, in the County
of Perth, North Britain, for the Invention of "AN IMPROVED STEAM
ADDERGADED IN A TRACTION ENGINE AND PORTABLE ENGINE"
PROVISIONAL SPECIFICATION left by the said William Thomas Carrington
at the Office of the Commissioners of Patents, with his Petition, on
the 7th February 1867.
I, WILLIAM THOMAS CARRINGTON, of Perth, in the County of Perth, North
Britain, do hereby declare the nature of the said Invention for "AN IMPROVED
STEAM ROLLER, ALSO APPLICABLE AS A TRACTION ENGINE AND PORTABLE ENGINE,"
to be as follows:-
My Invention consists of an improved steam roller wherein three rolling
wheels are employed, so arranged that while two of them are placed a certain
distance apart upon one and the same shaft the third is situated behind or in
front of the other two in a position corresponding with the space between
these, its width being such as just to overlap the width of such space. These
rolling wheels are mounted in a strong framing, upon which is placed the
boiler with large water tanks on each side thereof. One, two, or more steam
cylinders bolted to the framing impart motion to the two rolling wheels on the
same shaft by means of a crank shaft and suitable intermediate speed reducing

page_text: gearing, while the single rolling wheel is mounted in a swivelling frame
actuated by suitable gearing for steering and turning. The two driving rolling
wheels are so arranged that either the one or the other can be readily thrown
out of gear by means of a clutch apparatus or other known arrangement.
when the roller is required to turn or run in sharp curves, and the steering
wheel is, by preference, composed of two or more independent parts, so as to
relieve the grinding action on the road when turning. The axle boxes to the
driving rolling wheels are provided with india-rubber or other springs.
My improved steam roller may readily be used as a traction engine, and is
provided with reversing gear and the usual necessary appliances, which form
no part of my present Invention, and do not therefore require to be further
described. Also by adding a pulley on the intermediate shaft driven by the
steam cylinders, and by throwing both the driving rollers out of gear, this
steam roller may be employed as a portable engine.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Thomas Carrington in the Great Seal Patent Office
on the 6th August 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAN
THOMAS CARRINGTON, of Perth, in the County of Perth, North Britain, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of February, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Thomas Carrington, Her special licence that I, the said
William Thomas Carrington, my executors, administrators, and assigns,
or such others as I, the said William Thomas Carrington, my executors,
administrators, and 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 "AN IMPROVED STEAM ROLLER, ALSO APPLICABLE AS A TRACTION
ENGINE AND PORTABLE ENGINE," upon the condition (amongst others) that I,
the said William Thomas Carrington, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention,

page_text: 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 months next and
immediately after the date of the said Letters Patent.
'
NOW KNOW YE, that I, the said William Thomas Carrington, do
hereby declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement thereof, reference being had to the accompanying
Sheet of Drawings, and to the figures and letters marked thereon, that is to
say:
My Invention consists of an improved steam roller wherein three rolling
wheels are employed, so arranged that while two of them are placed a certain
distance apart upon one and the same shaft, the third is situated behind or in
front of the other two in a position corresponding with the space between
these, its width being such as just to overlap the width of such
These
space.
rolling wheels are mounted in a strong framing upon which is placed the
boiler with large water tanks on each side thereof. One, two, or more steam
cylinders bolted to the framing impart motion to the two rolling wheels on the
same sbaft by means of a crank shaft and suitable intermediate speed reducing
gearing, while the single rolling wheel is mounted in a swivelling frame
actuated by suitable gearing for steering and turning. The two driving rolling
wheels are so arranged that either the one or the other can be readily thrown
out of gear by means of a clutch apparatus or other known arrangement
when the roller is required to turn or run in sharp curves, and the steering
wheel is, by preference, composed of two or more independent parts, so as to
relieve the grinding action on the road when turning. The axle boxes to the
driving rolling wheels are provided with india-rubber or other springs..
My improved steam roller may readily be used as a traction engine, and' is
provided with reversing gear and the usual necessary appliances, which form
no part of my present Invention, and do not therefore require to be further
described. Also by adding a pulley on the intermediate shaft driven by the
steam cylinders, and by throwing both the driving rollers out of gear, the
steam roller may be employed as a portable engine.
Having thus set forth the nature of my Invention I will now proceed more
particularly to describe the manner of performing the same.
Figure 1 to 3 on the accompanying Sheet of Drawings show the before.
described improved steam roller; Figure 1 shows a side elevation of the same,
Figure 2 shows a plan, and Figure 3 shows an end elevation. Similar letters
indicate similar parts in each of the Figures."
A', A, A, are the rolling wheels, of which A1, A2, are loose upon one and

page_text: the same shaft B, upon the bearings C of which rests the strong framing D of
the engine. These rolling wheels are some distance apart, as shown more
clearly in Figure 3, and the third rolling wheel A³, by preference divided into
two parts, as shown on Plan, is so situated as to overlap the space between
them. This roller runs upon a shaft E carried by the frame F swivelling upon
a pin F fixed to framing D, and which is capable of being turned to a
certain extent for the purpose of steering the engine by means of steering
gear G, the pinion H of which is in gear with a toothed segment I on the
frame F. Upon the framing D is the steam boiler K of any suitable known
construction, on either side of which are the water tanks L, L, from which
the water is supplied to the boiler, by preference by a Giffard's injector M, and
on the top of which the necessary space is provided for the fuel. The engine
is driven by means of two steam cylinders N, N, fixed to the framing D in gear
with the crank shaft O carried by the cheeks P also fixed to the framing D.
The crank shaft carries a pinion Q in gear with the spur wheel R upon the
intermediate shaft U, also carried by the cheeks P. Loose upon this shaft are
two other spur wheels S, S, capable of being made to revolve therewith by means
of clutch apparatus T worked by suitable gearing by the driver, and these
wheels are in gear with two spur wheels V, V, fixed to the side of each rolling
wheel A', A. From this arrangement it will be seen that either both the
rolling wheels A1, A2, may be driven by the engine, or one may be thrown out
of gear by throwing out one of the clutches T, when it is desired to turn the
engine, or both may be thrown out of gear when the steam roller is to be
employed as a portable engine, in which case the shaft U will have to be
extended, as shown in dotted lines in Figure 2, and provided outside the
framing, D with a driving pulley W. X are india-rubber springs interposed
between the framing D and the bearings C of the shaft B. In place of
carrying the rollers A', A³, upon one and the same shaft they may have
separate shafts in a line with each other.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I wish it to be understood that I do not limit myself
to the precise details of machinery, as described with reference to the accom-
panying Drawings, as these may be variously modified without departing from
the nature of my Invention, nor do I claim such details as being of themselves
.new and original; but what I claim is,―
First, constructing steam rollers with three rolling wheels, two of which
are situated a distance apart either upon the same shaft or upon separate shafts
in a line with each other, while the third rolling wheel is situated in front of
or behind the others upon a swivelling frame, and in such a position as to pass

page_text: over the space left between the paths of the other two rolling wheels,
substantially as herein-before described.
Second, I claim the general arrangement of my improved steam roller,
as herein-before described with reference to the accompanying Sheet of
Drawings.
In witness whereof, I, the said William Thomas Carrington, have here-
unto set my hand and seal, this Third day of August, in the year of
our Lord Oue thousand eight hundred and sixty-seven.
W. T. CARRINGTON. (L.s.)