IMPROVEMENTS IN STEAM ENGINES AND THE PRO- DUCTION OF STEAM FOR THE SAME
Year: 1852

page_text: LETTERS PATENT to John Moore Hyde, of 1 Quay, in the City
and County of Bristol, Philosophical Instrument Maker, for
the Invention of "IMPROVEMENTS IN STEAM ENGINES AND THE PRO-
DUCTION OF STEAM FOR THE SAME."
Scaled the 10th June 1853, and dated the 22nd December 1852.
PROVISIONAL SPECIFICATION left by the said John Moore Hyde
at the Office of the Commissioners of Patents, with his Petition,
on the 22nd December 1852.
I, JOHN MOORE HYDE, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM ENGINES AND THE PRODUCTION OF
STEAM FOR THE SAME" to be as follows, viz. :-
My improvements consist of a chamber or hollow vessel attached
to the cylinder of a steam engine, which may be lined or cased with
brass, or copper, or other metal: such chamber or hollow vessel to
be immediately over the fire, and of such thickness of metal as shall
resist any probable amount of pressure it may be subject to; and of
sufficient dimensions to generate steam enough to fill the cylinder.
This chamber or hollow vessel to be provided with a force pump
of ordinary construction, capable of forcing or injecting water pre-
viously heated into and upon that part of the generator next the

page_text: fire; the steam to be produced to be admitted into the cylinder in
the ordinary way; the generator, cylinder, and valve box to be
entirely enclosed in an outer flue or case, and their surfaces to be
always exposed to the fire or hot air, which external flue or fire
case is equally applicable to the boilers, steam pipes, and cylinders
of the steam engines in present use.
SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said John Moore Hyde in the Great Seal
Patent Office on the 22nd June 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
JOHN MOORE HYDE, of 1 Quay, in the City and County of Bristol,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of December, in
the
year
of our Lord One thousand eight hundred and fifty-two, in
the sixteenth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Moore Hyde, Her
special licence that I, the said John Moore Hyde, my executors,
administrators, and assigns, or such others as I, the said John
Moore Hyde, 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 "IMPROVEMENTS IN STEAM ENGINES AND
THE PRODUCTION OF STEAM FOR THE SAME," &c. &c., upon the condition
(amongst others) that I, the said John Moore Hyde, by an instru-
ment in writing under my hand and seal, should particularly de-
scribe 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.

page_text: NOW KNOW YE, that I, the said John Moore Hyde, do hereby
declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof (that is to say):
I place a chamber or hollow vessel, which I term a generator, in
connection with the cylinder of a steam engine, and as close to it as
convenient. The lower part of this generator is to be constructed
of a stout plate of copper, or if made of iron, of two stout plates
lined or cased with thin brass or copper internally. A chamber or
generator, of about six times the capacity of the cylinder, will answer
the purpose satisfactorily. The generator must be of sufficient
thickness to resist any probable amount of pressure it may be subject
to. The upper part may be made of ordinary boiler plates, about
three eighths of an inch thick, and the bottom of copper plate of
about half an inch thick; or if two iron plates be substituted, they
may be half an inch each, and their casing of brass or copper about
one eighth of an inch. The generator may be constructed of any
shape according to circumstances, but I have adopted the form re-
presented in Fig. 1, and have found it to succeed very well. The
lower surface is covered with ribs of deep angle iron or copper, to
be placed across the fire; thus the double plates and the deep angle
iron will hold a considerable quantity of heat, which will pass with
more regularity to the inner casing. The generator is to be pro-
vided with a force pump of ordinary construction, capable of forcing
or injecting any required quantity of water, according to the volume
of steam required. The water is to be taken from the condenser,
and heated by passing through pipes, or in any other suitable man-
ner; and it is then to be injected into the generator, and distributed
over the internal surface by means of a pipe or pipes with numerous
small holes in them. The steam so produced may be admitted into
the cylinder in the ordinary way. The generator, cylinder, steam
pipes, and valve box, are to be enclosed in an outer flue or case,
whereby their surfaces will always be exposed to the fire or hot air.
The said external flue or fire case is also applicable to the boiler,
steam pipes; and cylinders of steam engines in present usc, and is

page_text: constructed as follows:-The entire engine, except such parts as
require adjustment, are to be cased with sheet iron, leaving ample
room round the cylinder to allow the hot air from the furnace to
pass freely. This iron case is to be covered with brick or other
good non-conducting material, such as plaster of Paris and sand; the
bricks to be protected with an outer case of wood or iron. In the
case of ordinary steam engines, where this arrangement is inconve-
nient, a separate stove may be employed for heating the cylinder,
&c., by allowing the heat from such stove to pass around the cy-
linder, &c.; and the cylinder and stove in this instance would be
enclosed in their own case. Thus instead of the engine being heated
by steam, and hence continually condensing some portion of it,
the steam will be heated or kept hot by the metallic surfaces of
the various parts of the engine.
My said Invention will be more fully understood by reference to
the Drawings hereto annexed.
DESCRIPTION OF THE DRAWINGS.
Fig. 1, a transverse sectional view of my improved engine and
apparatus, taken through the line Z, Z, in Fig. 2. Fig. 2, a longi-
tudinal section of the same, taken through the line Y, Y. In Fig.
1, a, is the upper portion of the generator; b, b, its lower portion,
shewn as constructed of two iron plates, and a copper lining as
before mentioned; c, c, ribs of angle iron or copper, screwed or
rivetted to the plates b, b; f (see Figure 2), an ordinary steam
cylinder, supplied by a pipe g, from the generator h; h, pipe through
which water from the condenser is forced by an ordinary pump, not
shewn in the Drawing, into the generator, and so arranged as to
allow the water passing through them to become heated before en-
tering it at the point h. The pipe i, is a continuation of them, and
inside the generator is drilled with numerous small holes for dis-
tributing the injected water; k, k, are the fire bars ; 1, 1, is the casing
over the generator, cylinder, pipes &c., composed as represented of
an inner lining of sheet iron, surrounded with brick or other non-
conducting material, and an external covering of wood; m, m, are

page_text: openings in the casing 1, provided with iron doors, which may be
opened for the purpose of lowering the temperature when desired
n, is the main chimney or flue. This may, if preferred, be provided
with a telescopic tube, inside the casing 1, for regulating the escape
of heated air. O, O, are two ordinary safety valves. Any form of
condensing apparatus may be used, but I prefer the usual surfacc
condenser.
Having now described the nature of my said Invention, and in
what manner the same is to be performed, I hereby declare that I
claim, as the Invention intended to be protected by the said Letters
Patent, a generator in combination with the cylinder, constructed,
and arranged, and enclosed in one and the same casing or covering
of bad conducting material, as above described. Also the combina-
tion and arrangement of the cylinder, and the parts thereto belong-
ing, with a separate stove for heating the same, as above described.
In witness whereof, I, the said John Moore Hyde, have hereunto
set my hand and seal, this Twenty-second day of June,
One thousand eight hundred and fifty-three.
Signed & Scaled in my presence,
F. W. CAMPIN.
J. M. HYDE. (L.S.)