Improvements in Injectors.
Year: 1894

page_text: Date of Application, 17th Apr., 1894
Complete Specification Left, 3rd Jan., 1895-Accepted, 9th Feb., 1895
Improvements in Injectors.
JOHN ALFRED MORRIS, and WILLIAM THOMAS HATCH and CUTHBERT
MATHER Engineers, all of The Empire Works, 78 Great Bridgewater Street,
Manchester, Lancashire, do hereby declare the nature of this invention to be as
follows:-
The prime object of our invention is an improved arrangement applied to
injectors, whereby they may become automatic or self starting in their action,
thus, should the conditions of working be altered, such as a temporary stoppage of
the water or steam supply, the injector will restart upon the restoration of the
normal conditions without any attention on the part of the attendant.
In injectors where the lifting cone is separate from the combining cone, we
extend the former and enlarge it, making a chamber-like end, into which is fitted
the end of combining cone. At the end of this chamber, are apertures, through
which steam or water may pass under certain conditions & thus escape through the
"overflow." These apertures are closed by a valve of flat or other kind of
surface, combined with a perforated tube or its equivalent, or with suitable guides
which fit the exterior of the extended part or chamber of "lifting cone
" and slide
thereon. Suitable provision is made for limiting the movement necessary for the
opening or closing of the valve and it is so arranged that if necessary, a spring may
be applied to help it in its action.
Dated this Sixteenth day of April 1894.
JOHN ALFRED MORRIS.
WM. THOS. HATCH.
CUTHBERT MATHER.
We, JOHN ALFRED MORRIS, WILLIAM THOMAS HATCH and CUTHBERT
MATHER, Engineers, all of 'The Empire Works, Great Bridgewater Street,
Manchester, in the County of Lancaster do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to the type of injectors known as automatic in which a
special or supplementary overflow chamber in communication with the lifting cone
is closed by a movable valve, when a vacuum is created in the chamber. "
It is designed to render the working of the injector more reliable and certain and
to make the apparatus simpler and more easy of construction and consists
essentially in forming a chamber at the bottom of the lifting cone with a wall or
ring into which the end of the combining cone tightly fits-provided with ports or
openings situated around the said combining cone-and in forming the valve which
closes these openings with a sleeve or suitable guides arranged to slide on the
outside of the said chamber and thus avoid sliding on the combining cone.

page_text: The invention will be fully described with reference to the accompanying
drawings in which as an example it is shewn as applied to one form of
injector.
Fig. 1. Sectional elevation.
Fig. 2. Transverse section on line X-Y Fig. 1.
Fig. 3. Elevation of the sliding valve G.
The casing A of the injector and the steam cone B are made of any ordinary form
or construction common in injectors.
The lifting cone C is extended and enlarged (as is sometimes customary) to form
the chamber D.
The end of the chamber D we form with a wall or ring E with orifices or ports e
formed therein. The wall E is bored out to receive and embrace the end of the
combining cone F which fits tight into it.
The combining cone F is internally of any ordinary construction and externally
it is shaped to avoid any contact between it and the base of the valve G. The end
of the combining cone may, and preferably does, project up through the wall E into
the chamber D, sufficient space being left between it and the nozzle of the lifting
cone to allow of the free escape of steam or water, which can flow away through
the ports or openings e.
The valve G which closes the ports or openings e in the en' of the chamber D
we form with a base g and a sleeve g'. The base g closes against the ports e and
the sleeve g forms a guide which fits over the exterior of the chamber D and slides
thereon. The sides of the sleeve g' are provided with a nunter of apertures g"
through which the steam or water can escape when the valve is not resting on its
seat. The seat for the valve is formed by the annular wall E at the base of the
chamber D. The valve thus slides upon the exterior of the lifting cone C and is
entirely free from and has no bearing against the combining cone F. The annular
wall or ring E prevents the passage of water, steam or air when the valve is closed,
a result which cannot be obtained when it is sought to make a sliding joint between
the valve and the combining cone.
A set screw or pin H is provided to limit the movement of the valve. This may
be inserted in the casing in the position shewn on the drawing or may be placed
higher up and be arranged to come in contact with a flange or projection raised on
the outside of the sleeve or to engage in a slot in the said sleeve, or it may be fixed
in the chamber itself.
If desired or found necessary a spring may be employed to keep the valve G to
its seat the spring being of such a strength that it will give way and allow the valve
to open when the injector is being started.
We wish it to be understood that the invention need not be confined to the
precise form of injector shewn on drawing but may be applied to other forms
irrespective of the positions of the branches.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
In an injector the combination with the lifting cone (C) having a chamber D of
a wall or ring at the discharge end to embrace the nozzle of the combining cone (F)
provided with discharge ports and forming a seating for a valve, and a valve fitted
with suitable guides sliding on the exterior of the lifting cone substantially as
described.
Doted this 13th dow of Doomben 1901
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.