IMPROVEMENTS IN SUPPLYING AND RE- GULATING AIR TO THE FURNACES OF LOCOMOTIVE. ENGINES
Year: 1842

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JEAN
GEORGE SUE CLARKE, of Euston Grove, in the County of Middlesex, Engineer,
send greeting.
WHEREAS Her present Most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster the Sixth day of April, in the fifth year of Her reign, did, for Herself,
Her heirs, and successors, give and grant unto me, the said Jean George Sue
Clarke, Her especial licence, full power, sole privilege and authority, that I,
the said Jean George Sue Clarke, my exors, adiñiors, and assigns, or such
others as I, the said Jean George Sue Clarke, my exors, adñiors, or assigns,
should at any time agree with, and no others, from time to time and at all
times during the term of years therein expressed, should and lawfully might
make, use, exercise, and vend, within England, Wales, and the Town of
Berwick-upon-Tweed, my Invention of "IMPROVEMENTS IN SUPPLYING AND RE-
GULATING AIR TO THE FURNACES OF LOCOMOTIVE. ENGINES;" in which said Letters
Patent is contained a proviso that I, the said Jean George Sue Clarke, shall
cause a particular description of the nature of my said Invention, and in what
manner the same is to be performed, to be inrolled in Her said Majesty's
High Court of Chancery within six calendar months next and immediately
after the date of the said in part recited Letters Patent, as in and by the
same, reference being thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, tho said
Jean George Sue Clarke, do hereby declare that the nature of my said
Invention, and the manner in which the same is to be performed, are fully
described and ascertained in and by the following statement thereof, reference
being bad to the Drawings hereunto annexed, and to the figures and letters
narked thereon, (that is to say):-
My Invention relates to the application of apparatus for heating and
regulating the air supplied to the furnaces of locomotivo engines, and in
such manner that the apparatus may bo moved out of the way when it is
desired to remove the fire, or for other purposes.
And in order that the Invention may bo most fully understood, and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed,
in which the same letters of reference are used to indicate similar parts
wherever they occur.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a longitudinal section of as much of a locomotive steam
engine boiler and fire box as will be necessary to explain the nature of my
Invention. Figure 2 is a transverse section of the same parts taken at the
dotted line A, B, in Figure 1; and Figures 3 and 4 show similar sections to
Figures 1 and 2, the only difference being that the apparatus for supplying
and regulating the air to the furnace is shown to be inclined downwards,
so as to allow of the fire bars being got at to remove the fire or for other
purposes.
The objects of the Invention being, first, to supply heated air heated in
suitable apparatus placed below the fire bars of the furnace; and, secondly,
to regulate such supply. It will not be necessary to enter into any description
of the construction of locomotive steam engine boiler furnaces, 1 shall, therefore,
confine my description to the apparatus applied below the fire bars for heating
and regulating the supply of air to a furnace. The apparatus consists of
incans of causing the supply of air to pass in contact with an extended surface
of metal heated by being placed below the fire bars of the furnace. And
although the construction of this apparatus may be varied without departing
from my Invention, so long as it is placed below the firo bars and offers
suflicient surface for heating the air, yet I believe the apparatus shown in the
Drawings will be found best suited for the purpose. Below the furnaco is
placed an axle a, which is carried by and moves in bearings b, b, affixed to
the sides of the boiler. On this axis is affixed two arms c, c, which have slots
formed in their outer ends to receive pins d affixed under the apparatus here-

page_text: after explained. And these arms c are for the purpose of raising and lowering
the back end of the apparatus for heating and regulating the supply of air, the
front end of the apparatus being binged to the lower part of the boiler or fire
box, as is shown in the Drawings. e is an arm affixed to the axis a, to which
is attached the connecting rod f by means of a pin joint; this rod at its
upper end being forked carries the axes of a screw socket 9, such screw socket
having the screw h passing through it. The screw h turns in bearings at i, i,
and on the upper end thereof is a cog wheel j affixed, which
driven by
means of the pinion and handle k, as will readily be understood on examining
the Drawings. The apparatus for heating and regulating the air, as it is
supplied to the furnace, consists of two compartments ? and m. The air
passes in at the opening 1, and thence under the surface l, which is heated
by the fire above, and by such means tho air becomes highly heated; the air
then passes down under the partition P, and enters the compartment m, from
whence it passes laterally into the ash-pit; and in order to regulate the supply
there is a valve applied at n, capable of covering the opening &, such valve
being capable of being kept moro or less open by the connecting rod o, which
is connected by a pin joint at one end to an arm affixed to the valve at p.
and at the other end the connecting rod is attached to the bell crank q, as is
shewn. r is a rod, having at its upper end a handle by which it can be
raised or lowered, and notches by which it can be supported at any desired
position, and at its lower end it is attached by a pin joint to the bell crank q.
By this means the engineer can regulate the supply of air to his furnace.
Having thus described the nature of my Invention, and the manner of per-.
forming the same, I would have it understood that what I claim is,—
First, the mode of supplying heated air to the furnaces of locomotive
engines by applying apparatus below the fire bars, as above described.
And, secondly, I claim the mode of regulating the supply of air to such
apparatus, as above described.
In witness whereof, I, the said Jean George Sue Clarke, have hereunto
set my hand and seal, this Twenty-first day of September, One
thousand eight hundred and forty-two.

page_text: Frederick Richard Sasse, of 4, Spring Gardens, in the County of Middlesex,
Gentleman, maketh oath that he is acquainted with the handwriting of
Thomas Pickford, Her Majesty's Consul at Paris, and that to the best of his
belief the signature to the acknowledgment of Mr. Clarke's Specification is
the handwriting of the said Thomas Pickford. And this deponent further
saith that to the best of his belief the said Thomas Pickford at the time of
taking the said acknowledgment of the said Jean George Sue Clarke, was
Her Majesty's Consul, resident in Paris.