IMPROVE- MENTS IN LOCOMOTIVE ENGINES
Year: 1865

page_text: LETTERS PATENT to Walter Montgomerie, of Glasgow, in the County
of Lanark, North Britain, Gentleman, for the Invention of "IMPROVE-
MENTS IN LOCOMOTIVE ENGINES."
Sealed the 14th November 1865, and dated the 16th May 1865.
PROVISIONAL SPECIFICATION left by the said Walter Montgomerie at
the Office of the Commissioners of Patents, with his Petition, on
the 16th May 1865.
I, WALTER MONTGOMERIE, of Glasgow, in the County of Lanark, North
Britain, Gentleman, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN LOCOMOTIVE ENGINES," to be as follows, that is to say:-
This Invention consists of improvements designed principally to obtain
increased weight upon the driving wheels of locomotive engines, and in one
modification the improvements are embodied in a structure intermediate
between what is known as a tank locomotive and the ordinary locomotive and
tender. In this modification the tender of a comparatively small size is
mounted on one pair of wheels near its after end, whilst its front is connected
to the fire-box, or to a cross frame fixed to the main frame immediately behind
the fire-box. The connection is made with a single vertical joint pin, or with two
vertical joint pins placed in the same vertical line, and the parts are socketed
or fitted together so as to prevent vertical play, and with this arrangement the
tender can swing horizontally sufficiently to adapt itself to curves, whilst

page_text: a part of its weight bears on the locomotive framing, and through it on the
driving wheels. The arrangement is particularly advantageous in the case of
locomotive engines, with driving wheels placed far aft like the after pair of
driving wheels of coupled engines. When the connection is made with two
joint pins, one may be at or near the foot plate, and the other above or below;
and when below it may be advantageously jointed to the bottom of the fire-
box, whilst if the after driving axle is behind the fire-box, space for that axle
may be provided between the two parts of the connection.
Locomotive engines may also have ordinary long tenders connected to them
in the same way, so as to render a part of the weight of the tenders available
on the driving wheels; and when it is considered desirable to give a certain
elasticity to the combined locomotive and tender, the lower connection may
consist of an inclined strut, having its lower front end connected to the fire-
box, whilst its upper back end is connected to a spring or springs on the
tender framing. The elasticity of the connection, as well as the proportion
of the weight transferred, will then depend on the spring, and can be modified
as may seem desirable by adjusting the spring.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Walter Montgomerie in the Great Seal Patent Office on
the 15th November 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WALTER
MONTGOMERIE, of Glasgow, in the County of Lanark, North Britain, Gentleman,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her.Letters
Patent, bearing date the Sixteenth day of May, in the year of our Lord One
thousand eight hundred and sixty-five, in the twenty-eighth year of Her reign
did, for Herself, Her heirs and successors, give and grant unto me, the said
Walter Montgomerie, Her special licence that I, the said Walter Mont-
gomerie, my executors, administrators, and assigns, or such others as I, the
said Walter Montgomerie, 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 "IMPROVE-
MENTS IN LOCOMOTIVE ENGINES," upon the condition (amongst others) that
I, the said Walter Montgomerie, my executors or administrators, by an

page_text: 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,
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 Walter Montgomerie, do hereby
declare my 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 in writing, reference being had to the accompanying
Drawings, that is to say :-
My said Invention consists of improvements designed principally to obtain
increased weight upon the driving wheels of locomotive engines.
And in order that the Invention and the manner of performing the same
may be properly understood, I have hereunto appended two Sheets of
explanatory Drawings, to be herein-after referred to, and representing two
modifications embodying my improvements.
In one modification shown on Sheet 1 of the Drawings, Figure 1 being a
partially sectioned side elevation, Figure 2 a transverse vertical section as at
A-A, in Figure 1, and Figure 3 a plan.
The improvements are embodied in a structure intermediate between what
is known as a tank locomotive and the ordinary locomotive and tender. In
this modification the tender 1, of a comparatively small size, is mounted on one
pair of wheels 2 near its after end, whilst its front is connected to the loco-
motive 3 by means of a vertical joint pin 4, the parts being socketed or fitted
together so as to prevent vertical play. The foot plate 5 of the locomotive,.
the inner and outer frame plates 6, and a bottom plate 7 are combined
together by means of angle iron to form a strong box, and into the open back.
end of this box the front 8 of the tender, constructed in a similar box-like
way, is entered. The joint pin 4 is entered down through both boxes, the
openings in the several plates being strengthened by thickness pieces rivetted.
on, whilst a pipe 9 is fixed to the top and bottom plates of the tender front
for the pin to pass through and to give additional strength to the part. With
this arrangement the tender I can swing horizontally sufficiently to adapt
itself to curves, whilst a part of its weight bears on the locomotive framing
and through it on the driving wheels.
The arrangement is particularly advantageous in the case of locomotive
engines, with driving wheels placed far aft like the after pair of driving wheels
of coupled engines. The connection inay be made with two vertical joint
pins, both being, of course, in the same vertical line, and one of such pins

page_text: may be at or near the foot plate 5, and the other either above or below.
When the second joint pin is placed below the foot plate it may be advan-
tageously jointed to the bottom of the fire-box, whilst, if the after driving axle
is behind the fire-box, space for that axle may be provided between the two
parts of the connection. Locomotive engines may also have ordinary long
tenders connected to them in the same way, so as to render a part of the weight
of the tenders available on the driving wheels; and when it is considered desirable
to give a certain vertical elasticity to the combined locomotive and tender, the
lower connection may consist of an inclined strut, having its lower front end
connected to the locomotive framing, whilst its upper back end is connected
to a spring or springs within the tender framing. The elasticity of the con-
nection, as well as the proportion of the weight transferred, will then depend
on the spring, and can be modified as may seem desirable by adjusting the
spring.
A modification answering this description is shown upon Sheet 2 of the
Drawings, Figure 4 being a partially sectioned side elevation, Figure 5 a
transverse vertical section as at the line B-B, in Figure 4, and Figure 6 a
horizontal section as at the line C-C, in Figure 4. The tender 1 in this
example is generally similar to a long tender such as is ordinarily constructed
with three pairs of wheels, but it is made with only two pairs of wheels, the
front pair being as it were removed, so as to throw the weight of the front
part of the tender more or less upon the locomotive 3. The connection
between the tender and locomotive is in two parts, the upper part resembling
the modification shown on Sheet 1 of the Drawings, and herein-before
described, with the box-like formation of the after end of the locomotive and
of the front end of the tender. The bottom plate 7, however, of the loco-
motive box framing is arranged somewhat lower, the joint pin 4 being
lengthened to pass through it. An oblique bar or strut 10 has the pin 4
passing through its lower front end, and that end rests on the bottom plate 7,
or rather on a suitable strengthening ring or plate rivetted thereon, whilst its
upper back end is jointed to a block 11, arranged in guides fixed to the under
side of the tender 1. The block 11 is formed with a head, which bears upon
a strong spring 12 in a cylinder or case 13, and a disc 14 bears on the other
end of the spring, and can be adjusted by a screw 15.
Having thus particularly described my said Invention, and the manner in
which the same is or may be performed, I have to state that I do not restrict
myself to the precise details herein described or delineated, but that what I
believe to be novel and original and claim as the Invention secured to me by
the herein-before in part recited Letters Patent is, the obtaining of increased

page_text: weight upon the driving wheels of a locomotive engine by connecting the
tender thereto, substantially in the improved manner herein-before described.
In witness whereof, I, the said Walter Montgomerie, have hereunto
set my hand and seal, this Thirtieth day of October, in the year of
our Lord One thousand eight hundred and sixty-five.
WALTER MONTGOMERIE. (L.S.)