IMPROVEMENTS IN APPARATUS FOR DRYING STEAM, OR FOR SEPARATING WATER FROM STEAM
Year: 1873

page_text: LETTERS PATENT to James Tillott, of Higher Openshaw, near
Manchester, in the County of Lancaster, Mechanic, for the Inven-
tion of "IMPROVEMENTS IN APPARATUS FOR DRYING STEAM, OR FOR
SEPARATING WATER FROM STEAM."
PROVISIONAL SPECIFICATION left by the said James Tillott at the
Office of the Commissioners of Patents, with his Petition, on the
2nd August 1878.
I, JAMES TILLOTT, of Higher Openshaw, near Manchester, in the
County of Lancaster, Mechanic, do hereby declare the nature of the
said Invention for “ IMPROVEMENTS IN APPARATUS FOR DRYING STEAM OR FOR
SEPARATING WATER FROM STEAM,”" to be as follows :—
My Invention relates more particularly to apparatus employed in the
generation of steam, and has for its object to prevent or to lessen
priming," that is to say, to check the tendency of steam when issuing
from-the generator to transport water into the steam pipes.

page_text: When carrying my said Invention into effect I fit a chamber within
the boiler or generator, the said chamber by preference extending from
end to end or from back to front of the said generator, and being con-
tracted at the upper part, the sides of the said upper part being
perforated. Within the said chamber, and extending from end to end
thereof or thereabouts, I arrange a perforated tube or two or more
perforated tubes, which communicate with the outer steam supply pipe
or pipes, and within the said chamber I also arrange a heating tube or
heating tubes, through which heated gases from the furnace are allowed
to flow, as for example, I may employ one heating tube between two
steam tubes, the last named tubes being perforated on the sides nearest
to the said heating tube. I provide suitable means for regulating or for
shutting off the flow of heated gases through the said heating tube or
tubes. I also prefer to fix a perforated strainer on each side of the
chamber, the steam having to flow through the said strainers and through
the perforations in the chamber. Any water which may
enter the said
chamber is returned to the, lower part of the generator by means of a
pipe or of pipes.
I consider my said Invention to be particularly applicable to marine
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Tillott in the Great Seal Patent Office
on the 2nd February 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
TILLOTT, of Higher Openshaw, near Manchester, in the County of
Lancaster, Mechanic, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of August, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said James Tillott, Her special
license that I, the said James Tillott, my executors, administrators,
and assigns, or such others as I, the said James Tillott, my executors,
administrators, and assigns, should at any time agree with and no others,

page_text: 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 APPARATUS
FOR DRYING STEAM OR FOR SEPARATING WATER FROM STEAM," upon the
condition (amongst others) that I, the said James Tillott, by an instru-
ment in writing under my hand and seal, 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 James Tillott, 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 (and accompanying Drawings), that is to say :-
My Invention relates more particularly to apparatus employed in the
generation of steam, and has for its object to prevent or to lessen
priming, that is to say, to check the tendency of steam when issuing
from the generator to transport water into the steam pipes.
When carrying my said Invention into effect I fit a chamber within
the boiler or generator, the said chamber by preference extending from
end to end or from back to front of the said generator or nearly, and
being constructed at the upper part, the sides of the said upper part
being perforated. Within the said chamber I arrange a perforated tube, or
; two or more perforated tubes, which communicate with the outer steam
supply pipe or pipes, and within the said chamber I also arrange a
heating tube or heating tubes, through which heated gases from the
furnace are allowed to flow, as for example, I may employ one heating
tube between two steam tubes, the last named tubes being perforated on
> the sides nearest to the said heating tube. I provide suitable means for
regulating or for shutting off the flow of heated gases through the said
heating tube or tubes. I also prefer to fix a perforated strainer on each
side of the chamber, the steam having to flow through the said strainers,
and through the perforations in the chamber. Any water which may
> enter the said chamber is returned to the lower part of the generator by
means of a nine or of nines.

page_text: And in order that my said Invention may be fully understood I will
now refer to the accompanying Sheet of Drawings, made to a scale of
about one-sixteenth of the full size, and representing a steam boiler
or generator with my improved apparatus applied thereto.
In the said Drawings Fig. 1 represents a vertical cross section, and
Fig. 2 a vertical longitudinal section of an ordinary double-flued boiler.
In the said Figures a is the aforesaid chamber; 6 is a perforated
strainer tube; and c, c, are two heating tubes. The chamber a is sus-
pended or fixed within the boiler with its open mouth fitting as close to
the crown of the boiler as is practicable, in order that the steam may be
compelled to enter the chamber through perforations made near its
upper edges, as seen in Fig. 1, the intention being that the flow of steam
into the chamber shall be nearly equal at all parts of its length. On
each side of the said chamber is a perforated plate d, which assists in
checking the passage of water into the said chamber, and in the example
the said chamber is sustained by the said plates. The tube 6 is closed
at the ends, and is connected by the short pipe e with the steam exit
pipe, or with the stop valve inlet indicated by f, and the said tube is
perforated throughout its length, the size and number of perforations
being such as would be considered to have the effect of causing a nearly
equal flow of steam into the said tube at different points in its length.
Each of the heating tubes c, c, is attached by one end to the crown of
one of the furnace flues, and by the other end to the back of the boiler,
and both tubes pass through the chamber a, one on each side of the
tube 6. Heated gases flow through the tubes c, c, from the furnaces
into the back external flue. The perforations in the tube 6 are by pre-
ference formed on the sides nearest to the tubes c, c, so that the steam
flowing into the tube 6 is caused to impinge upon the said tubes, and
thereby to be dried and superheated to some extent. Water which may
enter the chamber, or which may arise from the condensation of steam
therein, is returned into the boiler by the pipe g.
The dotted lines h indicate an alternative arrangement, in which the
said water is returned to the bottom of the boiler through a pipe passing
out of the boiler, and fitted with a stop valve. This arrangement I
consider to be suitable to be employed in marine boilers, to which I
believe my Invention to be particularly applicable.
Although only one perforated tube is represented in the Drawings,

page_text: two or more of such tubes may be applied in one chamber as herein
aforesaid as preferred or considered to be more suitable in any case.
Having now fully described and indicated the nature of my said Inven-
tion, and the manner in which I prefer to carry the same into practical
effect, I would in conclusion have it to be understood that I claim,―
First. The combination of a perforated tube or pipe, with a straining
chamber or separator, substantially as in the case of the chamber a and
the tube b, for the purpose set forth and indicated herein.
And lastly. The combination and arrangement of parts, substantially
as set forth and indicated herein and in the accompanying Drawings.
In witness whereof, I, the said James Tillott, have hereunto set
my hand and seal, this Thirty-first day of January, in the
year of our Lord One thousand eight hundred and seventy-
four.
Signed and sealed by the said
James Tillott, in the pre-
sence of
EDWARD K. DUTTON,
Agent to the Patentee,
JAMES TILLOTT. (L.S.)
8, Princess Street,
Manchester.