IMPROVEMENTS IN INJECTORS, AND ARRANGEMENTS FOR WORKING THE SAME.
Year: 1871

page_text: LETTERS PATENT to Francis William Webb, of Crewe, in the
County of Chester, Mechanical Engineer, for the Invention of
"IMPROVEMENTS IN INJECTORS, AND ARRANGEMENTS FOR WORKING THE
SAME.
"
Sealed the 23rd February 1872, and dated the 6th November 1871.
PROVISIONAL SPECIFICATION left by the said Francis William Webb
at the Office of the Commissioners of Patents, with his Petition,
on the 6th November 1871.
I, FRANCIS WILLIAM WEBB, of Crewe, in the County of Chester,
Mechanical Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN INJECTORS, AND ARRANGEMENTS FOR WORKING THE SAME,"
to be as follows:-
My Invention consists in an improved combination and arrangement
of injector for feeding steam boilers. The water passes through the
injector from one end to the other in the direction of its axis, the
injector forming a direct continuation of the pipe communicating

page_text: between the water supply and the boiler. The steam is brought to a
fixed nozzle by a lateral passage in the body or casing of the injector,
which is made with an open slot opposite the overflow orifice. The
combining and discharging nozzles are formed either in one piece which
is coned to fit a surrounding overflow chamber, or is screwed therein,
or the two nozzles are made separately and screwed into the overflow
chamber, which fits and can slide up and down in the slot in the body
or casing to adjust the nozzles. The overflow chamber has a cock
combined with it, by turning which the overflow: orifice may be opened
or closed as required, and the cock is actuated by a handle on a shaft,
which is screwed at the end to fit a nut hand wheel having bearings
in the side of the clack box or on the injector. By turning the hand
wheel the combining nozzle is adjusted in respect to the fixed steam
nozzle.
When the cock of the overflow chamber is closed the steam may be
made to pass back from the injector to the water supply to warm the
feed water, thus dispensing with special pipes for this purpose.
The movement for adjusting the combining nozzle may be com-
municated through a lever, which can slide and rotate in a swivel
fulcrum piece, the rotatory motion of the lever being for the purpose
of turning the cock, which may be arranged to suit the position of the
injector. A gland packing may be used round the exterior of the
discharging nozzle and within the slotted part of the body or casing
when required.
Injectors constructed as described are made suitable for right or left
by simply turning the part forming the overflow chamber in its slot in
the body of the injector.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixth day of November, in the year
of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did,. for Herself, Her heirs and successors,
give and grant unto me, the said Francis William Webb, Her special
licence that I, the said Francis William Webb, my executors, adminis-
trators, and assigns, or such others as I, the said Francis William
Webb, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 INJECTORS, AND ARRANGEMENTS FOR
WORKING THE SAME," upon the condition (amongst others) that I,
the said Francis William Webb, by an instrument 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 per-
formed, 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 Francis William Webb, do hereby
declare the nature of my 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 consists in an improved combination and arrangements
and mode of constructing injectors for feeding steam boilers. The water
passes through the injector from one end to the other in the direction
of its axis, the injector forming a direct continuation of the pipe com-
municating between the water supply and the boiler. The steam is
brought to a fixed nozzle by a lateral passage in the body or casing of
the injector, which is made with an open slot opposite the overflow
orifice. The combining and discharging nozzles are formed either in
one piece which is coned to fit a surrounding overflow chamber, or is
screwed therein, or is fitted in and secured by a screw nut, or the two
nozzles are made separately and screwed into the overflow chamber,
which fits and can slide up and down in the slot in the body or casing
to adjust the nozzles. The overflow chamber has a cock combined with

page_text: it, by turning which the overflow orifice may be opened or closed as
required, and the cock is actuated by a handle or a shaft which is
screwed at the end to fit a nut hand wheel having bearings on the sido
of the clack box or on the injector. By turning the hand wheel the
combining nozzle is adjusted in respect to the fixed steam nozzle, and 5
by partly rotating the shaft the cock is opened or closed..
When the cock or overflow chamber is closed the steam may be made
to pass back from the injector to the water supply to warm the feed
water, thus dispensing with special pipes for this purpose.
The movement for adjusting the combining nozzle (especially when 1
the axis of the injector is in a horizontal position) may be com-
municated through a lever which can slide and rotate or partly rotate
in a swivel fulcrum piece, the rotatory motion of the lever being for the
purpose of turning the cock, which may be arranged to suit the
position of the injector. A gland packing may be used round the 1
exterior of the discharging nozzle and within the slotted part of the
body or casing when required.
Injectors constructed as described are made suitable for right or left
by simply turning the part forming the overflow chamber in its slot in
the body of the injector and screwing the bottom part in which the 2
branch for the steam pipe is formed a half a turn round.
Fig. 1 is a longitudinal front section of my improved injector combined
with a clack box and stop valve; and Fig. 2 is a longitudinal side
section through the same injector, the one section being taken at a
right angle to the other.
Fig. 3 is a front longitudinal section of a similar injector, but inverted
in respect to the handle for actuating the overflow cock.
•
2
Fig. 4 is a longitudinal section similar to that shown by Fig. 1,
except that the axis of the cock connected with the overflow orifico.
is at a right angle to the axis of the injector; and Fig. 5 is a cross 3
section through the injector and cock, showing the mode of actuating
the nozzles and cock by a lever.
a, the water supply pipe, which may be connected to the injector as
shown; b is part of the injector having the lateral passage or branch b¹
to which the steam supply pipe (6) is connected, as shown. The steam 3
nozzle (b) is screwed into the end of the lateral passage, as shown.

page_text: The body part (c) of the injector is made in one piece, and is bored out
to fit the combining cone or nozzle and the discharging cone or nozzle,
and it has a slot formed in it large enough to admit the overflow
chamber and allow of its movement for adjustment. The combining (d)
and discharging (e) nozzles are made in one piece in the examples shown
by the Drawings, and they are made to pass through the two sides of
the overflow chamber ƒ, and are ground to fit tight, and secured by a
screw nut (e³) having notches in its edge, so that it can be rotated by a
suitable screw key. The combining and discharging nozzles & and e
(especially the latter) are made to fit as accurately as possible in the
bores of the body of the injector, and there are lateral passages d¹ to
allow the fluid to escape into the overflow chamber when required.
This chamber (f) has a hollow conc plug (fƒ³) fitted in it, sccured by a
screw nut (f) and washer (5), as shown, the waste fluid escaping
through the hollow of the plug when the cock is opened, and may be
conveyed in any convenient direction by a pipe screwed into the plug.
To one end of the plug of the cock one end of a shaft g is connected by
a pin, as shown (or otherwise), the other end is screwed and passes
through a corresponding nut in a hand wheel g, having bearings on the
clack box, as shown, though it may be on any other convenient part of
the injector, or on a special bracket. The cock is opened or shut by
turning the handle g³ on the shaft g.
The injector, clack box, and stop valve is shown combined together in
Figs. 1 and 2, h being the ball valve or clack, and i the stop valve,
which is secured to the boiler by bolts, as shown, the injector part being
further secured by bolts passing through the bracket cast upon the body
part of the injector. Fig. 3 will not require any explanation, being
similar to Fig. 1, except that the plug f' and shaft 7 for the cock is
reversed. In reference to Figs. 4 and 5 it need only be stated that the
axis of the plug f' of the cock is shown at a right angle to the axis of
the injector, and that the shaft g is a lever, which can be partly rotated
and can slide through a swivel cyc (9³) held in a bracket g' secured to
any convenient part or bracket. Friction is put upon the lever (9) or
swivel eye () to prevent it from moving too easily.
I have now particularly described the nature of my Invention, and
the mode of carrying it into effect, and claim as my Invention,―
Firstly. The combination, arrangement, and construction of injectors
with an open slot in the body large enough to admit an overflow

page_text: chamber which embraces the nozzles, and which injectors are also
arranged that the same shaft, handle, or lever that opens and closes
the overflow cock is also used for adjusting the nozzles (d and e),
substantially as herein-before described and illustrated by the accom-
panying Drawings.
Secondly. The combination and arrangement of the parts of an
injector, clack, and stop valve, and mechanism for adjusting the nozzles
and actuating the overflow cock, substantially as herein-before described
and illustrated by the Drawings.
In witness whereof, I, the said Francis William Webb, have here- 1
unto set my hand and seal, this Thirtieth day of April, in
the year of our Lord One thousand eight hundred and seventy-