IMPROVEMENTS IN APPARATUS FOR SUPPLY- ING STEAM GENERATORS WITH WATER
Year: 1860

page_text: LETTERS PATENT to Thomas Hunt, of Crewe, in the County of Chester,
Engineer, for the Invention of "IMPROVEMENTS IN APPARATUS FOR SUPPLY-
ING STEAM GENERATORS WITH WATER."
Sealed the 22nd May 1861, and dated the 21st December 1860.
PROVISIONAL SPECIFICATION left by the said Thomas Hunt at the
Office of the Commissioners of Patents, with his Petition, on the 21st
December 1860.
I, THOMAS HUNT, of Crewe, in the County of Chester, Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN APPARATUS
FOR SUPPLYING STEAM GENERATORS WITH WATER," to be as follows:-
This Invention relates to certain improvements upon and modifications of
what is known as "Giffard's feed water injector," whereby a more regular
and continuous supply of water is obtained, and the apparatus is rendered
generally more regular in its action. For this purpose it is proposed to place
a chamber or reservoir in close proximity to the injector, or to surround a
portion of the injector by a chamber or reservoir of sufficient capacity to
contain as much water as will feed the injector at an uniform rate, and
neutralize any reaction in the current of the water between its source and the
injector, which current is assisted by the partial vacuum formed in the upper
portion of the chamber or reservoir.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Hunt in the Great Seal Patent Office on the
21st June 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, THOMAS
HUNT, of Crewe, in the County of Chester, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of December, in the
year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Thomas Hunt, Her special license that I, the said Thomas Hunt, my
executors, administrators, and assigns, or such others as I, the said Thomas
Hunt, my executors, administrators, or 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
APPARATUS FOR SUPPLYING STEAM GENERATORS WITH WATER," upon the con-
dition (amongst others) that I, the said Thomas Hunt, my executors or
administrators, by an instrument in writing under my hand and seal, or under
the hand and seal of one of them, 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 Thomas Hunt, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the accompanying Drawings, and to the
letters and figures marked thereon, that is to say :-
My said Invention relates to certain improvements upon and modifications
of what is known as "Giffard's feed water injector," whereby a more regular
and continuous supply of water is obtained, and the apparatus is rendered
generally more regular in its action. For this purpose I place a chamber or
reservoir, in close proximity to the steam jet nozzle of the injector, or surround
such portion of the injector by a chamber or reservoir of sufficient capacity to
contain as much water as will feed the injector at a uniform rate, and
neutralize any reaction in the current of the water between its sourse and the
injector.

page_text: And in order that my said Invention may be fully understood, I shall
now proceed more particularly to describe the same, and for that purpose I
shall refer to the several Figures on the Sheet of Drawings hereunto annexed,
the same letters of reference indicating corresponding parts in both the
Figures.
Figure 1 of the annexed Sheet of Drawings represents a vertical section of
an ordinary feed water injector with my improvements attached, and Figure 2
is a sectional plan of the same taken along the line 1, 2, in Figure 1.
A, A', represent the outer shell or main body of the injector, and B is the
reservoir or chamber which surrounds the steam jet nozzle, and which is
constantly supplied with water from the tender or other source of supply by
the inlet pipe C. The reervoir or chamber B in place of surrounding or
inclosing the steam jet muzzle, may, if preferred, be situate on one side thereof,
or in close proximity thereto, the lower portion only of the reservoir or
chamber B, or a branch leading therefrom being made to surround the nozzle
of the steam jet pipe, the essential feature of my present improvements being
the maintaining of such nozzle constantly surrounded by or immersed in the
feed water when in action.
Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried
into effect, I would observe in conclusion that what I consider to be novel and
original, and therefore claim as the Invention secured to me by the herein-
before in part recited Letters Patent, is,
First, the general construction, arrangement, and combination of apparatus
for supplying steam generators with water, as herein-before described.
Second, the application and use to and in what is commonly known as
Giffard's feed water injector," of a reservoir or chamber in close proximity
to or surrounding the nozzle of the jet pipe, for the purpose herein-before
lescribed.
In witness whereof, I, the said Thomas Hunt, have hereunto set my
hand and seal, this Seventeenth day of June, in the year of our Lord
One thousand eight hundred and sixty-one.
THOS. HUNT. (L.S.)