IMPROVEMENTS IN INJECTORS AND EJECTORS.
Year: 1877

page_text: LETTERS PATENT to Edward Goodman Sheward, of Lavington Lodge, Peters-
ham, in the County of Surrey, and James Gresham, of the Firm Gresham
and Craven, of Craven Iron Works, Salford, in the County of Lancaster,
Engineers, for the Invention of "IMPROVEMENTS IN INJECTORS AND EJECTORS.'
Sealed the 22nd March 1878, and dated the 26th November 1877.
PROVISIONAL SPECIFICATION left by the said Edward Goodman Sheward
and James Gresham at the Office of the Commissioners of Patents on the 26th
November 1877.
EDWARD GOODMAN SHEWARD, of Lavington Lodge, Petersham, in the County of
Surrey, and JAMES GRESHAM, of the Firm Gresham and Craven, of Craven Iron
Works, Salford, in the County of Lancaster, Engineers. "IMPROVEMENTS IN
INJECTORS AND EJECTORS."
Our improvements relate to an improved mode or modes of constructing injectors
and ejectors in such manner that they may be readily taken in pieces for examina-
tion or the removal of accidental obstructions without separating the external case
of the injector or ejector from the pipes conveying the fluids to and from the same,
and our Invention consists in arranging and constructing the injector or ejectors as
illustrated by the accompanying Drawings.
Fig. 1 is a longitudinal section; Fig. 2, a cross section at 1-2, through the water
chamber; and Fig. 3, a cross section at 3-4, through the delivery chamber.
The improved injector or ejector consists of a body-or casing (a), which has a
branch or connection (a¹) for the water, another (a) for the overflow, and another (a³)
to take away the combined steam and fluid, and one (a) for the steam if used as an
injector; but for ejectors for forming a vacuum or propelling air we prefer to make
the air pass in at (a) and the steam at (a¹). The passages forming the combining
and discharging cones are all formed in one piece (b), as shown, and this central
part (b) is also formed so that the steam nozzle (c) is or may be screwed in, as
shown.

page_text: The casing (a) is bored out in those parts in which the central part (b) has to
make joints with the interior of the casing either cylindrically or conically, and one
end of the central part (b) is screwed to screw into the casing (a), as shown, and
this screwed end is of the largest diameter; the other bosses upon it that make
joints with the casing (a) are successively smaller, the steam nozzle end of the
central part (b) being the smallest in diameter. By this means the unscrewing of
the central part (b) will withdraw it, and if any dirt should adhere to the external
bosses on the central part (b) the successive enlargements of the holes will allow
them to pass out unobstructed.
The lower part of the discharging cone in the part (b) is closed by a screw plug (b¹),
which when removed allows the passages to be examined and freed, when required,
from obstruction.
In some cases the steam nozzle (c) may be screwed into the casing (a), and the
steam or other fluid may be taken to the injector or ejector by a side branch, and
access is or may be obtained to the steam nozzle in such case by removing a screw
plug placed at the end of the casing axially with the injector or ejector. The
delivery end of the discharging cone may be as shown in full line, or as in peculiar
dotted line, in which latter case the parts b* would be radiating webs in the
passage leading to the outlet (a³). By taking in the steam into the casing laterally
the part (b) may be reversed, that is, entirely put in and withdrawn from the
opposite end of the casing (a).
The improvements above described are applicable to almost all kinds of injectors
by making the inlets and discharging outlets on the side of the casing of the
injector.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edward Goodman Sheward and James Gresham in the Great Seal
Patent Office on the 22nd May 1878.
EDWARD GOODMAN SHEWARD, of Lavington Lodge, Petersham, in the County of
Surrey, and JAMES GRESHAM, of the Firm Gresham and Craven, of Craven Iron
Works, Salford, in the County of Lancaster, Engineers. "IMPROVEMENTS IN
INJECTORS AND EJECTORS."
Our improvements relate to an improved mode or modes of constructing injectors
and ejectors in such manner that they may be readily taken in pieces for examina-
tion or the removal of accidental obstructions without separating the external case
of the injector or ejector from the pipes conveying the fluids to and from the same,
and ou Invention consists in arranging and constructing the injector or ejector
as herein-after described, and illustrated by the accompanying Drawings.
Fig. 1 is a longitudinal section of our improved injector or ejector without a
central spindle for regulating the steam; Fig. 2 is a longitudinal section of our
improved injector with a central spindle and valve for regulating the steam supply;
Fig. 3 is a cross section at 1-2, Figs. 1 and 2'; and Fig. 4 is a cross section at
3-4, Figs. 1 and 2; and Fig. 5 is a cross section at 5-6, Figs. 1 and 2.
Fig. 6 is a side and Fig. 7 is an edge view of a key suitable for taking the injector
or ejector to pieces, the ends of which are for the screws and the side to act as a
screwdriver to remove the nozzle (c).
Fig. 8 is a longitudinal section of another modification, where the nozzles are
taken from the casing of the injector or ejector at the opposite end to that shown
by Fig. 1; and Figs. 9, 10, and 11 are cross sections, taken respectively on the lines
1-2, and 3-4, and 5-6, Fig. 8.
Our improved injector or ejector consists, as shown by Figs. 1 to 6, of a body or
casing a, which has a branch or connection (a¹) for the water, another (a2) for the
overflow, and another (a³) to take away the combined steam and fluid, and one a*
for the steam if used as an injector; but for ejectors for forming a vacuum or pro-
pelling air we prefer to make the air pass in at a and the steam at a¹. For ejectors
or apparatus for forming vacuum or propelling air the overflow orifice is dispensed
with. The passages forming the combining and discharging cones are all made in
one central piece (b), as shown, and this central part (b) is also formed so that the
steam nozzle (c) is or may be screwed in, as shown. The fluid passes to the nozzle c
through slits 62 in the part b, and the overflow passes out by the slot b³, and the
combined steam and fluid passes through slits or orifices 6 to the outlet branch a³.
The casing (a) is bored out in those parts in which the central part (b) has to
make joints with the interior of the casing, either cylindrically or conically, and the
end of the central part b is screwed to screw into the casing (a), as shown, and this
screwed end is of the largest diameter; the other bosses upon it that make joints
with the casing (a) are successively smaller, the steam nozzle end of the central
part (b) being the smallest in diameter. By this means the unscrewing of the
central part (b) will withdraw it, and if any dirt should adhere to the external
bosses on the central part (b) the successive enlargement of the holes will allow
them to pass out unobstructed.
The lower end of the discharging cone in part (b) is closed by a screw plug (b¹),
which when removed allows the passages to be examined and freed, when required,
from obstructions.
Figs. 8, 9, 10, and 11 illustrate an injector or ejector in which the parts are
reversed. The part (b) is screwed into the casing, as shown, and the central nozzle c
is screwed into the part (b), and b' is a screw plug for closing the end of the part b,
which is made with slits, as shown, opposite to the steam branch a' in the casing for
steam, and with slits, as shown, opposite the water branch a' on the casing for
water, the casing having a chamber for the overflow a². For ejectors the steam and

page_text: air may enter at the branches a¹ and a respectively. The part b is made with
enlargements, as before explained in reference to Figs. 1 and 2 (but the smallest end
is the discharging end), so as to be easily withdrawn unobstructed.
We have now particularly described the nature of our Invention, and the mode
of carrying the same into effect, and claim as our Invention,
Firstly. The combination, arrangement, and construction of injectors and ejectors
with casings (a) and internal parts (b), as herein-before described, and illustrated
by the accompanying Drawings:
Secondly. The construction of the part (b) with a screw thread at one end to
screw in and out at one end of the casing (a), and making joints with the casing,
substantially as herein-before described, and illustrated by the accompanying
Drawings.
Thirdly. The making of the part (b) with successive enlargements where it forms
joints with the casing (a), substantially as herein-before described, and illustrated
by the accompanying Drawings.
Fourthly. The screw plug (61) for closing the central passage in the internal part (b)
at one end, and for examining the passages and removing obstructions when
required, substantially as herein-before described, and illustrated by the accom-
panying Drawings.
In witness whereof, I, the said James Gresham, on behalf of myself and the
said Edward Goodman Sheward, have hereunto set my hand and seal this
Twenty-first day of May, in the year of our Lord One thousand eight
hundred and seventy-eight.
JAMES GRESHAM. (L.S.)