IMPROVEMENTS IN APPARATUS USED IN COMBINATION WITH FIRE-BOXES OF TUBULAR STEAM BOILERS, IN ORDER TO SUPPLY AIR AND STEAM THERETO
Year: 1858

page_text: LETTERS PATENT to Daniel Frodsham, of Rose Cottage, Gurney Road,
Stratford, in the County of Essex, for the Invention of "IMPROVEMENTS
IN APPARATUS USED IN COMBINATION WITH FIRE-BOXES OF TUBULAR STEAM
BOILERS, IN ORDER TO SUPPLY AIR AND STEAM THERETO."
Sealed the 3rd June 1859, in pursuance of an Order of the Lord Chancellor;
PROVISIONAL SPECIFICATION left by the said Daniel Frodsham at the
Office of the Commissioners of Patents, with his Petition, on the
13th November 1858.
I, DANIEL FRODSHAM, of Rose Cottage, Gurney Road, Stratford, in the
County of Essex, do hereby declare the nature of the Invention for "Im-
PROVEMENTS IN APPARATUS USED IN COMBINATION WITH FIRE-BOXES OF TUBULAR
STEAM BOILERS, IN ORDER TO SUPPLY AIR AND STEAM THERETO," to be as
follows:-
This Invention has for its object improvements in apparatus used in com-
bination with the fire-boxes of tubular steam boilers, in order to supply air and
steam thereto. For these purposes, on the interior of the opening into the
fire-box of a steam boiler, where the fuel is fed into the fire-box, is applied a
plate, which is hinged at its upper edge, and when it hangs in a vertical
position, the opening into the fire-box is closed. In order to adjust and

page_text: retain this plate in any desired inclined position, suitable apparatus is applied,
and the plate is provided with angular plates at the sides, in order to prevent
the air passing sideways into the fire-box, the object being to deflect the air,
which enters the opening, down on to the ignited fuel below. On the outside
of the fire-box a door is used to close the feed opening when desired, and such
door is hinged at its lower edge, and it is arranged to be held open at any
desired angle. I make no claim, however, to what is herein-before described,
as a new Invention, otherwise than in combination with what follows herein-
after. Across the fire-box and just below the feed opening there is a per-
forated tube which receives air from two bell-mouthed tubes which pass under
the fire-box, and have their bell mouths forward or in a direction when
applied to a locomotive boiler to catch the air, and thus to cause it to pass
more freely into the perforated tube within the fire-box; the object being
thus to introduce streams of air over the ignited fuel on the fire-bars below
such perforated tube. Across the back of the fire-box and near the upper
part of the tube plate is applied a perforated tube, which is in connection
with the steam chest of the boiler by means of a tube having a stop-cock
thereon, so that regulated quantities of steam may be introduced into the
perforated tube, which is so perforated that numerous jets of steam are pro-
jected downwards across the flue tubes, and on to the upper surface of the fire
im the fire-box. By these means eoal can be more advantageously burned
in such fire-boxes of steam boilers.
SPECIFICATION filed in pursuance of the conditions of the Letters Patent
and of an Order of the Lord Chancellor, by the said Daniel Frodsham in
the Great Seal Patent Office on the 11th June 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DANIEL
FRODSHAM, of Rose Cottage, Gurney Road, Stratford, in the County of
Essex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of November, in the year of our
Lord One thousand eight hundred and fifty-eight, in the twenty-second year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Daniel Frodsham, Her special licence that I, the
said Daniel Frodsham, my executors, administrators, and assigns, or
such others as I, the said Daniel Frodsham, my executors, administrators,
and assigns, should at any time agree with, and no others, from time.

page_text: 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 "IMPROVEMENTS IN APPARATUS USED IN COMBINATION WITH FIRE-
BOXES OF TUBULAR STEAM BOILERS, IN ORDER TO SUPPLY AIR AND STEAM THERETO,"
upon the condition (amongst others) that I, the said Daniel Frodsham, 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, 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 Daniel Frodsham, 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, that is to say :-
This Invention has for its object improvements in apparatus used in con-
bination with the fire-boxes of tubular steam boilers, in order to supply air
and steam thereto. For these purposes, on the interior of the opening into
the fire-box of a steam boiler, where the fuel is fed into the fire-box, is applied
a plate, which is hinged at its upper edge, and when it hangs in a vertical
position, the opening into the fire-box is closed. In order to adjust and retain
this plate in any desired inclined position, suitable apparatus is applied, and
the plate is provided with angular plates at the sides, in order to prevent the
air passing sideways into the fire-box, the object being to deflect the air, which
enters the opening, down on to the ignited fuel below. On the outside of the
fire-box a door is used to close the feed opening when desired, and such door-
is hinged at its lower edge, and it is arranged to be held open at any desired
angle. I make no claim, however, to what is herein-before described as. a
new Invention, other than in combination with what follows hereafter. Across
the fire-box, and just below the feed opening there is a perforated tube which
receives air from two bell-mouthed tubes which pass under the fire-box, and
have their bell mouths forward or in a direction when applied to locomotive
boilers to catch the air, and thus to cause it to pass more freely into the perforated
5 tube within the fire-box; the object being thus to introduce streams of air
over the ignited fuel on the fire bars below such perforated tube. Across tho
back of the fire-box and near the upper part of the tube plate is applied
a perforated tube, which is in connection with the steam chest of the boiler
by means of a tube having a stop-cock thereon, so that regulated quantities of

page_text: numerous streams or jets of steam are projected downwards across the nue
tubes, and on to the upper surface of the fire in the fire-box. By these
means coal can be more advantageously burned in such fire-boxes of steam
boilers.
And in order that my said Invention may be most fully understood and
readily carried into effect, I will proceed to describe the Drawings hereunto
annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a back elevation; Figure 2, a longitudinal section of a fire-
box of a locomotive, arranged according to my Invention; Figure 3 is a front
elevation of the smoke box with some of the parts removed; Figure 7 is a
plan of part of the engine. A is the opening from which the fuel is fed
into the fire-box; A¹ is the plate which is hinged at its upper edge to pieces
B, B, which are fixed to the interior of the fire-box. When this plate is in
a vertical position, the opening A into the fire-box is all but closed. In order
to adjust and retain this plate in any desired inclined position, there is hinged
to the plate A¹ a rod c, as shewn more clearly in the enlarged sectional view
of this plate at Figure 5. This rod passes through a slot in a plate on the
exterior of the fire-box, and according as the portion of the plate at the
bottom of the slot enters one or other of the notches in the rod, so will the
plate A¹ be held more or less inclined. The sides of the plate A¹ are formed
with inclines as shewn at a, a, to prevent the air passing sideways into the
fire-box, so that the air is caused to pass down on to the ignited fuel below.
J is the door on the outside of the fire-box (see Figures 8 and 9), which is
hinged at its lower edge. Attached to the fire-box at the side of this door
there is a circular toothed rack J¹, into one or other of the teeth of which a
spring catch J, attached to the door J, enters, so that this door also can be
held open at any desired angle. E is the perforated tube, which passes across
the fire-box just below the feed opening A. This tube receives air when the
locomotive is moving forwards through the bell-mouthed tubes D, which pass
under the fire-box, and have their bell mouths forward in a direction to catch
the air, and thus cause it to pass freely into the perforated tube E, within the
fire-box. When the locomotive is being moved backwards, the air passes
into the tube D through the bell mouth, the passage through the other bell
mouth on the tube D being then closed. By this means streams of air are
introduced over the ignited fuel on the fire bars below. A perforated tube
may be used across the fire-box, and near the upper part of the tube plate, or

page_text: in place of this tube, tubes F, F, may be used, connected by means of the
tubes F¹ with the steam chest of the boiler, as shewn in the Drawings, and
in this pipe there is a stop-cock G, to regulate the quantity of steam to be
introduced into the tubes F, and the ends of the tubes F are made so that
streams or jets of steam are projected downwards across the flue tubes, and
on to the upper surface of the fire in the fire-box, as shewn in red lines at
Figure 2. H is a pipe to admit steam from the steam chest to the chimney,
to assist the draught when the engine is standing; I is a cock on the pipe H.
Having thus described the nature of my Invention and the manner of per-
forming the same, I would remark that although I have only shewn my improved
apparatus combined with the fire-box of the steam boiler of a locomotive, yet
so much of my Invention as consists in the combination of the adjusting
deflecting apparatus A¹, and the steam jets at the back of the furnace, may be
applied to marine and other forms of tubular boilers; what I claim is the
combined use of apparatus for supplying air from the front downwards on to
the fuel below, together with streams of steam from the back parts of
furnaces downwards, as above described.
In witness whereof, I, the said Daniel Frodsham, have hereunto set
my hand and seal, this Ninth day of June, in the year of our Lord
One thousand eight hundred and fifty-nine.
DANIEL FRODSHAM.
(L.B.)