Year: 1897

page_text: We, CHARLES BURRELL, Junior, of Shrublands, Thetford, Norfolk, Engineer, and
WILLIAM CAMPBELL WILSON, Saint Nicholas Street, Thetford, Norfolk, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to steam boilers of railway or tramway locomotives, traction
engines or any kind of self-moving or portable engines, where such boilers are of the
locomotive type, having the axis of the boiler & the flue tubes which lead out of the
fire-box, horizontal or nearly so.
The object of the invention is to prevent the fire-box crowns of such boilers,
becoming uncovered when on an incline in such position that the end of the boiler
farthest from the fire-box is lower than the fire-box end.
In order to carry out this invention, we fix a plate inside the boiler transversely
across the longitudinal axis of the boiler, near to where the barrel is joined to the
fire-box casing, attaching this plate to the firebox tube-plate and to the outer shell
so that the plate acts like a bulk-head & prevents water from passing from the firebox
end of the boiler to the other end or vice-versa, excepting through the hole or holes
hereinafter referred to.
At the top or near the top of this plate viz. in that part of it which is in the steam
space we make the hole or holes referred to above, or we cut away the upper portion
of the plate altogether so that steam & water may pass freely through.
The effect of the presence of this partition plate is to form a kind of dam which
will maintain a certain quantity of water over the fire-box crown, although the boiler
may be tilted longitudinally to a considerable degree. In feeding the boiler with
water we may employ two separate feeds, one for each end of the boiler, or we may
feed into the fire-box end of the boiler only keeping the water level in this end high
enough so that the water may over-flow through the apertures in the partition plate
into the other section of the boiler, or we may have a connecting pipe giving a
communication from one side of the partition plate to the other & have a valve or
stop-cock in this connecting pipe so as to stop the communication when the boiler is
going to be tilted.
The bulkhead or partition-plate may be rivetted, or studded or bolted into place,
and is cut away all round the region of the tubes, leaving just enough plate to fasten
to the tube-plate. Where it is required to pass the stays through the partition plate
we arrange so that water will not be allowed to pass, by fitting glands, or nuts, and
washers or collars with cotters, or any such suitable means on the stays where they
pass through the plate.
Dated this 10th day of February 1897

page_text: We, CHARLES BURRELL, JUNK., of Shrublands, Thetford, Norfolk, Engineer, and
WILLIAM CAMPBELL WILSON, of St. Nicholas Street, Thetford, Norfolk, Engineer, do
hereby declare the nature of this invention and in what manner the same is to be.
performed, to be particularly described and ascertained in and by the following
statement —
Our invention relates to improvements in that description of boiler that is termed
multitubular and has special reference to that class which is termed the locomotive
type of boiler.
The object of our invention is to prevent the more or less denuding or uncovering
of the crown of the fire box that takes place when the boiler is tipped or tilted in
certain directions, such tilting or tipping being incident to the purpose for which
such boiler is used for example-when locomotive type boilers are employed for
traction engines or for purposes which disturb the normal level of the water in the
boiler over the fire box crown.
The general description of our invention is much as hereinafter stated.
At some suitable place at or near and in a more or less parallel direction with the
tube plate of the fire box is fixed a plate, such plate will be hereinafter referred to as
the dam-plate.
The dam-plate is fixed to the tube plate lapping it sufficiently to make a joint at
or near the margin of the tube plate in the space unoccupied by the tubes, the
central part of the dam plate through which the tubes pass being cut away, the uncut
margin being that portion of the plate that is attached to the tube plate by means of
rivets or other well known means.
The dam plate is extended upwards into the steam space of the boiler in a more or
less vertical direction, and is in contact with the shell of the boiler a certain required
distance and may be attached to the shell by means of nuts, screws, welding or any
of the other usual or well known means therefore.
The damn-plate terminates at some suitable and required distance from the top
portion of the inside of the shell of the boiler such top portion of the boiler will be
hereinafter referred to as the crown of the boiler and the edge of the dam-plate
nearest the crown of the boiler will be hereinafter referred to as the free edge of the
dam plate. The free edge of the dam plate may be more or less curved or turned
over upon itself if required and may be perforated or slotted if required to allow the
⚫scape of water or steam.
When fire boxes as applied to locomotive boilers are constructed with water spaces
surrounding the lower portion of the fire-box and when such lower portions of the fire
box and their surrounding water spaces which water spaces will be hereinafter called
fe box water pockets are at a lower level than the barrel of the boiler, then the dam
plate is so shaped that it cuts off all water communication between the barrel of the
boiler and the fire box water pockets by means of a lip or shoulder flanged on the
dam plate or there may be a separate plate closing up the space between the tube
plate, and the barrel of the boiler.
In order to equalise when required the water levels in the barrel and the water
space around the fire-box and for other purposes such as localising the introduction of
feed water to either the barrel of boiler or around the fire box of boiler, or for other
purposes we provide a device as will be hereinafter described.
A hole is formed at or near the bottom or lower side of the barrel of the boiler,
another hole is also made in the outside plate of the fire-box water pocket.
These two holes are connected by a pipe, such pipe will be hereinafter referred to as

page_text: in manner as hereinafter described.
A is the barrel of the boiler.
P smoke box end, & Q the fire-box end.
B is the tube plate.
C is the crown plate of the fire box.
S are the stays on the crown plate of fire box
R are the flue tubes leading from fire box to smoke box.
Tis a stay staying smoke box plate to front plate of fire box.
H fire box water pocket space. O¹ opening into the fire box water pocket space.
O opening into the water space of the lower portion of the boiler-barrel.
JK a pipe in communication with the openings 0 01
M cock or valve controlling the passage way of pipe J, K. Cock M may be a
three way cock and used for blowing off.
Dotted line N N¹ indicates the normal position of water when the boiler is in a
level position longitudinally. Dotted line L L¹ shows the position the water assumes
when the fire box is tilted up, as for example-when a traction or self moving engine
is going down hill smoke box end first.
D is the damn-plate. D¹ the lipped or shouldered or flanged portion which divides
the back portion of the fire box water pocket from the barrel of the boiler and is
continuous or made equivalent thereto with the other portion D of the dam-plate.
G is the fire box space W water injection-valve. F fire hole.
The resulting effect in practice from the use of our invention will be as follows—
Supposing water is introduced into the boiler through the injection valve W, it
immediately rises up to the level N¹ and from thence flows over the top of the dam
plate D into the barrel of the boiler A A or if the cock M is open the water will rise
in the fire box water pockets and barrel of boiler when the level of the latter is
reached through the pipe J, K in equal levels.
And in the event of the fire box end being tilted up the water will be retained in
the crown of the fire-box by the dam plate D, and assume the direction more or less
of the water level line L¹.
It is obvious that if it is desired alternately to inject feed water in the barrel of the
boiler in the first instance and from thence to fill the fire box water pockets and fire
box spaces it can be done by closing the passage way of the pipe J K, and increasing
the water level in the barrel of the boiler until the water flows over the dam plate D
into the fire box water spaces. And if at any time it is desired to equalise the levels
of the water in the fire box water spaces with that of the level of the water in the
barrel of the boiler it can be effected by means of opening the cock M in the pipe
J K and thus giving free passage through the same of the water in the fire box water
spaces and that in the boiler barrel.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
The application of a dam plate for use in locomotive and boilers of a similar class
made and applied in the manner as herein set forth and described.
The application of a connecting pipe or pipes between the fire box water pockets
and the barrel portion of the boiler in the manner as herein set forth and described
in connection with a dam plate in the manner as hereinbefore described & set forth.
The controlling of the passage through the connecting pipe or pipes between the
fire box water pockets and the barrel portion of the boiler by means of cocks, valves,

page_text: or their equivalents having two or more ways, one or more of such ways being used
for blowing off purposes from the fire box water spaces and barrel of boiler in the
manner as herein set forth and described.
W. M. LLEWELLIN, C.E.,
15, King Square, Bristol, Agent for Applicant.