IMPROVEMENTS IN INJECTORS FOR STEAM GENERATORS
Year: 1875

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co, Patent Agents, Southampton Buildings, London,
for the Invention of "IMPROVEMENTS IN INJECTORS FOR STEAM
GENERATORS." A communication from abroad by Samuel Rue,
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition, on
the 16th March 1875.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN INJECTORS FOR STEAM
GENERATORS," a communication, to be as follows :—
This Invention relates to a single piece or casting having therein two
chambers, one for a water supply, connecting with the water supply
pipe, and the other for an overflow, into which chambers two plugs, one
for steam and the other for delivery to the boiler, are fitted at opposite

page_text: chambers, and extending from points near to the inner ends of the two
plugs.
It also relates to tapering boxes made through the plugs and inter-
mediate tube with a diminishing bore from the steam pipe to the delivery
tube, whereby the pressure and velocity of the water are increased, and
the resistance of the check valve overcome.
It further relates to a jet of steam introduced into the overflow as far
remote as possible from the point where the steam and water at first
come in contact for the ordinary purposes of the injector, so as to form
a more perfect vacuum, and also serve to create a draught or suction
through the injector for effectively lifting the water and starting it
running through the injector, and drawing out any hot air or water
with which it may be filled; this device constituting a double injector or
a combined injector, or a combined ejector and injector.
It also relates to a lever in combination with other parts, whereby the
injector is readily applicable for either right or left-hand purposes.
This lever has its axis or fulcrum on the bed plate or casting, and one end
of the said lever is jointed to a collar secured to the tube. By removing
the axial bolt or pin, releasing the lever swinging round the collar, and
reapplying the lever to the opposite side of the casting, the said lever is
readily adapted for a right or left hand injector.
It also relates to a valve in the overflow, which closes when the
injector is in action for preventing the indraught of air, thus obviating
noise and the otherwise occurring retardation of action.
:
The head constitutes an overflow chamber, and through the overflow
is passed a tube, which extends from a point at the top of the head,
and continues beyond the tube and pipe and projects through the
mouth of the overflow into a supplementary tube at the bottom of the
head.
A shell or tube extends horizontally and longitudinally from opposite
inner walls of the head, and is formed therewith. In the upper side of
this tubular passage is an opening, and water passing through the tube
may escape through the opening into the overflow chamber and out at
the mouth of the latter. A hollow screw plug is placed in the upper

page_text: end of the casting, and in the hollow thereof plays the stem of a valve,
which is located in line with the opening of the tubular passage, and
adapted to cover and uncover the opening.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 15th September 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixteenth day of March, in the year of
our Lord One thousand eight hundred and seventy-five, in the thirty-
cighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Robert Lake, Her special
licence that I, the said William Robert Lake, my executors, adminis-
trators, and assigns, or such others as I, the said William Robert Lake,
my executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during tho
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 INJECTORS FOR STEAM GENERATORS," a communication to me from
abroad by Samuel Rue, of Philadelphia, Pennsylvania, United States.
of America, Machinist, upon the condition (amongst others) that
I, the said William Robert Lake, my executors or administrators
by an instrument in writing under my, or their, or one of their
hands and seals, 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 William Robert Lake, do hereby
declare the nature of the said Invention and in what manner the come

page_text: similar pipe or plug projecting into the chamber C. Extending from
one chamber to the other is a tube H, which has a longitudinal sliding
motion, so as to be adjustable, and its ends project into these chambers
respectively. The connection of the injector with the steam pipe is
shewn at I, and that with the water supply at J. The attachment of
the injector with the generator is at E. M represents a lever, whose
axis or fulcrum c is on the bed plate or casting A, and one end of said.
lever is jointed to a collar H¹ secured to the tube H.
The head C constitutes an overflow chamber, and through the overflow
is passed a tube S, which extends from a point P. at the top of the
head C, and continues beyond the tube H and pipe D, and projects
through the mouth of the overflow into a supplementary tube R at the
bottom of the head C.
The bore of said tube R may be taper in either direction or it may
have a double taper.
T represents a shell or tube, which extends horizontally and longi-
tudinally from opposite inner walls of the head C, and is formed
therewith. In the upper side of this tubular passage T is an opening T,
and water passing through the tube H may escape through the opening T:
into the overflow chamber, and out at the mouth of the latter. A
hollow screw plug Q is placed in the upper end of the casting C, and in.
the hollow thereof plays the stem of a valve V, which is located in line
with the opening T' of the tubular passage T, and adapted to cover and
uncover said opening..
The water is turned on at J, and as soon as it appears at the overflow
the steam is turned on at I slowly until it catches the water, and then.
fully on, the lever M being pushed either forwards or backwards
until neither steam nor water shows at the overflow, and it can thus be
ascertained where the lever must be set for the amount of steam carried,
or how it is to regulate the proportionate amounts of water and
steam.
The plugs D, D¹, and intermediate tube H are made with taper
bores, which diminish from the steam pipe to the delivery pipe, whereby
the pressure and velocity of the water are increased, and the resistance

page_text: When the water first passes through the tube H, not having sufficient
force to open the check valve and enter the generator, it raises the
valve V, and escapes by the overflow, but when the water acquires
sufficient force to open the check valve it ceases to overflow, and thus
passes into and supplies the generator. The valve V then lowers and
closes the opening T¹, and prevents the admission of air, thus obviating
the otherwise occurrence of noise and retardation of action.
The valve may be returned to its position on the opening T¹ by a
spring arranged on the stem of the valve or elsewhere, or a valve may be
placed in the lower part of the overflow and upheld by a spring.
By removing the axial bolt or pin c, releasing the lever M, swinging
round the collar H³, and reapplying the lever to the opposite side of
the casting A, said lever is readily adapted for a right or left-hand.
injector.
The extent of leverage of the lever M. may be increased by diminishing 1
the distance between the bed plate A and tube H.
When the water is to be "lifted" steam is admitted to the pipe S at
P, and passes in the form of a jet into the tube R, so as to draw with it
the air in the overflow chamber, and any air or water in the tube H. By
the vacuum thus produced the water is drawn up in the pipe J and 2
caused to flow through the tube H and out through the overflow and
pipe R. Steam is then turned on at I, and in the manner above stated
the water is forced into the generator.
When the injector is in operation the water is drawn up or lifted
without the assistance of the jet from pipe S, in which case steam to the 2
latter pipe is cut off.
Having thus fully described the said Invention, as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim,―
First. The injector consisting of a single casting with two chambers 3
at the ends thereof, a plug in each chamber, and an intermediate tube
extending from one chamber to the other, as above set forth.
.
Second: The taper bores of the plugs and intermediate tube
diminishing from the steam pipe to the delivery tube, as above set
forth.
3

page_text: Third. A jet of steam introduced into the overflow, as above set forth
and for the purpose described.
Fourth. The lever M applied as described and adapted for a right or
left-hand injector.
Fifth. A valve in the overflow, as above described and for the purpose
set forth.
Sixth. The steam pipe S in combination with the tube II and overflow
chamber, as above described and for the purpose set forth.
Seventh. The tubular passage T with opening T³, and the valve V in
combination with the overflow, the tube H and plug D¹, as above
described and for the purpose set forth.
In witness whereof, I, the said William Robert Lake, have
hereunto set my hand and seal, this Fifteenth day of September,
in the year of our Lord One thousand eight hundred and
seventy-five.
Witness,
HY. JA. NOONE.
W. ROBT. LAKE.
(L.S.)