IMPROVEMENTS IN STEAM BOILERS. FURNACES FOR THE SAME, AND APPARATUS CONNECTED THEREWITH
Year: 1856

page_text: LETTERS PATENT to Charles Herbert Holt, of the City of Manchester, in
the County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS
IN STEAM BOILERS. FURNACES FOR THE SAME, AND APPARATUS CONNECTED
THEREWITH."
Sealed the 25th November 1856, and dated the 28th May 1856.
PROVISIONAL SPECIFICATION left by the said Charles Herbert Holt
at the Office of the Commissioners of Patents, with his Petition, on the
28th May 1856.
I, CHARLES HERBERT HOLT, of the City of Manchester, in the County of
Lancaster, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN STEAM BOILERS, FURNACES FOR THE SAME, AND APPARATUS CON-
NECTED THEREWITH," to be as follows:-
I obtain an upward and downward draught for the furnace, by which the
smoke will be consumed. I have a heating apparatus to heat or partially heat
the water before entering the boiler, which I insert in the exhaust steam pipe
of the engine through which the water is forced by the force pump into the
boiler. I work an equalising or diminishing valve with mercury, and have an
arrangement to alter the same to work at any pressure at pleasure. I have
an apparatus to take off the water produced by the condensed steam in the
steam pipes, &c., without allowing.steam to escape. I have a steam guage
worked with mercury placed in a vertical iron tube with a glass indicator and
[Price 8d.]

page_text: descending scale to shew the height of mercury in the iron tube, thereby in-
dicating the pressure of steam or fluids or liquids. I have also an apparatus
for measuring the water used by steam boilers, &c., the said apparatus to be
worked with cylinder and pistons, &c.
These improvements will be clearly understood by referring to the accom-
panying four Sheets of Drawings, in which Figures 1, 2, 3, and 4 are views of
a boiler, showing the flames ascending and descending amongst the hollow
tubes placed longitudinally in the flue or flues. Figures 5, 6, 7, & 8 are views
of a boiler, showing the flames ascending and descending amongst the hollow
tubes placed crosswise in the flue or flues. Figures 9 and 10 are views of
diminishing or equalising valve. Figures 11 and 12 are views of warming
apparatus. Figure 13, a view of apparatus for taking off the condensed water.
Figures 11; 15, & 16 are views of steam guage; and Figures 17 and 18 are
views of water meter.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Herbert Holt in the Great Seal Patent Office on the
27th November 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I. CHARLES
HERBERT HOLT, of the City of Manchester, in the County of Lancaster, Engi-
neer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Royal
Letters Patent, bearing date the Twenty-eighth day of May, in the year of
our Lord One thousand eight hundred and fifty-six, in the nineteenth, year of
Her reign,did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Herbert Holt, Her special licence that I, the said Charles
Herbert Holt, my executors, administrators, and assigns, or such others as
I, the said Charles Herbert Holt, 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 STEAM BOILERS, FURNACES FOR THE SAME, AND APPARATUS CONNECTED
THEREWITH," upon the condition (amongst others) that I, the said Charles
Herbert Holt, by an instruinent in writing under my hand and seal, should
particularly describe and ascertain the nature of the said Invention, and in

page_text: what manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calender months next and imme-
diately after the date of the said Royal Letters Patent.
NOW KNOW YE, that 1, the said Charles Herbert Holt, 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 fol-
lowing statement (that is to say) :-
:-
The nature of my Invention consists, firstly, of an improved method of
obtaining an upward and downward draught in the furnaces of steam boilers,
by which the smoke or combustible matter will be consumed or partially
consumed.
Secondly, of an improved diminishing or equalizing valve worked with
mercury, having an arrangement to alter the same to work at any required
pressure.
Thirdly, of an improved feed water warming apparatus to heat or partially
heat the water before entering the boiler, which I insert in the exhaust steam
pipe of the engine, through which the water is forced by the force pump into
the boiler.
Fourthly, of an improved steam gauge worked with mercury placed in a
vertical tube with a glass indicator and descending scale to shew the height of
mercury in the tube, and thereby indicate the pressure of steam or fluid.
The method of carying my said improvements into practical effect will be
clearly understood by reference to the accompanying two Sheets of Drawings,
and the letters of reference marked thereon, in which Sheet 1, Fig. 1 is a
transverse section through the tube c ofmy improved furnace for steam boilers
with a boiler fixed; Fig. 2, a longitudinal section of the same; Fig. 3, a
transverse section through the brick stop g and the tube c; and Fig. 4, a
sectional plan thereof. a represents the barrel of the boiler; b, the internal
flue; c, the grate bars; d, a door for the purpose of cleaning out the internal
flue; e, tubes placed across the interual flue to form water spaces, and also for
the purpose of fixing in the longitudinal tubes f. By placing the tubes in this
way I gain a large amount of heating surface. g represents brick
stops, for
the purpose of causing the smoke and gases to pass under and over the longi-
tudinal and cross tubes. By this arrangement I obtain an upward and down-
ward draught.
In Sheet 1, Fig. 5 is a transverse section through the brick stop g of another
arrangement of furnace for obtaining an upward and downward draught with
the tubes placed across the internal fine; Fig.6, a longitudinal section; Fig.7,
a tranverse section through the tubes f; and Fig. 8, a sectional plan of the

page_text: same. a represents the barrel of the boiler; b, the internal flue; c, the grate
bars; d, a door for the purpose of cleaning out the internal flue; e, the tube
plates to fix the tube ends in ; f, the cross tubes. By this arrangement I gain
a large amount of heating surface. g represents the brick stops for the purpose
of causing the smoke and gases to pass under and over the cross tubes, by
which I obtain an upward and downward draught.
In Sheet 2, Fig. 9 is a longitudinal section of my improved diminishing or
equalizing valve; and Fig. 10, a plan of the same.
a represents the inlet
pipes for the steam; b, the box; c, c, c, union couplings connecting the pipes
d, d, which pipes convey the steam from the box b into the chamber or receiver
e; the pipe g holds a quantity of mercury; h is a small safety valve to prevent
the mercury being wasted when a sudden rush of steam takes place; i is a
tube for the mercury to pass up into the chamber or receiver). This receiver
has a float suspended inside, which is connected with the rod b to the end of
On this shaft is fixed
the lever m, which is fixed to the end of the shaft n.
the lever o, for the purpose of raising or lowering the equilibrium valve p,
which lets the steam out of the box 6 through the outlet pipe y. By this
arrangement of valve I can admit the steam into the outlet pipe q at any
pressure, and pass the same through the diminishing valve to any reduced
pressure that may be required.
of
Fig. 11, Sheet 2, is a longitudinal section, and Fig. 12, a transverse section,
my feed water warming apparatus,in which a represents the exhaust steam
inlet pipe; b, the exhaust steam outlet branch; c. the feed water inlet branch;
d, tubes for the water to be forced through into the end space e, down which
space the water is forced through the tubes into the space g, and thence
through the outlet branch h. By this arrangement I heat the water before it
enters the boiler: .
Fig. 13, Sheet 2, is a front view, Fig. 14, a plan, and Fig. 15, a section of
my improved steam gauge. a represents the steam inlet; b, a tube containing
mercury with the centre tube c for the mercury to rise to obtain the required
pressure of steam; d, a passage for the mercury to pass to the glass tube c
which indicates the pressure of steam by the index f.
Having thus fully described the nature and particulars of my said Invention
and the manner in which the same is to be performed, I desire it to be dis-
tinctly understood that I do not confine myself to the exact details herein set
forth; but I claim,―
Firstly, the arrangement of a furnace or furnaces for obtaining an upward
and downward draught by means of two fires on the same level, which cause
the smoke or combustible matter to be consumed by passing through the

page_text: red fire, as seen in Figs. 1, 2, 3, 4, 5, 6, 7, and 8 of the accompanying
Drawings.
Secondly, the construction and arrangement of a valve with the chambers
or receivers e and j, as shewn in Fig. 9, whether the said chambers be both
outside of the valve, or one inside and the other outside, or whether the float
shall shut the valve by rising in the top chamber or lowering in the bottom
one, as also the telescope slide i and g, for the purpose of altering the pressure
as may be required, the same being worked either with or without the swivel
joints c, c, c, and the pipes or tubes d, d.
Thirdly, the improved feed water warming apparatus, as shewn in Figs. 11
and 12.
And, fourthly, the improved mercurial steam gauge with metal cistern and
glass indicator, as shewn in Figs. 13, 14, and 15 of the accompanying
Drawings.
In witness whereof, I, the said Charles Herbert Holt, have hereunto set
my hand and seal, this Twenty-fifth day of November, One thousand
eight hundred and fifty-six.
Witness,
0
E. J. HUGHES,
Patent Agent,
Manchester.
CHARLES HERBERT HOLT. (L.S.)