Improvements in Injectors.
Year: 1890

page_text: Date of Application, 12th May, 1890-Accepted, 14th June, 1890
COMPLETE SPECIFICATION.
Improvements in Injectors.
A communication from abroad by LOUIS SCHUTTE, of Philadelphia, in the County
of Philadelphia, State of Pennsylvania, United States of America.
1, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster, and 323, High Holborn, in the County of Middlesex, Civil
Engineer, 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 :-
The present invention has reference to that class of steam-injectors in which
two nozzles or series of nozzles are arranged side by side in such manner
that the fluids discharged from the first are returned and delivered through
the second, and is intended more particularly as an improvement on that class of
apparatus, wherein the valves controlling the admission of steam to the respective
nozzles are connected through intermediate devices with a single controlling-
lever.
The aims of the present invention are, first, to adapt the water-chambers to drain
themselves completely at all times, in order to facilitate the starting of the apparatus
and to enable the same to lift the water to a greater height; second, to render the
water-passages of a more uniform area and of smaller size in cross-section, in order
to maintain a higher speed in the movement of the water, and a consequent prevention
of the loss of power which heretofore resulted from a change of speed into pressure
and pressure into speed again; and, third, to secure a more uniform wear of the
parts and a more perfect seating of the starting-valve. In order to accomplish these
results, two nozzles or series of nozzles are arranged in lines converging toward
the discharge or delivery end of the injector, instead of in parallel lines, as heretofore,
and the starting-valve is arranged in a vertical instead of a horizontal position.
Suitable connections between the lever which operates the starting-valve and the
overflow-valve are also provided, as hereinafter explained.
In the accompanying drawings:
Figure 1 represents a central axial section through the improved injector.
Figure 2 is an end elevation of the same.
Referring to the drawings:
A, represents the body of the apparatus commonly cast complete in one piece with
a steam-admission throat a and a water-admission throat 63 on opposite sides near one.
end, and with a delivery-throat c² at the opposite end. The steam, entering the
chamber a¹ at one end of the apparatus, escapes thence through the steam-nozzles b
and b, lying side by side. The nozzle b is projected slightly into the open end of
and delivers its steam longitudinally through the contracted combining tube or
nozzle c, which is joined to and delivers into the smaller end of the discharge-nozzle d
in the manner customary in this class of apparatus. The nozzle b¹ delivers in like
manner into the combining-tube c', which discharges through the delivery-tube d¹.
The fluids discharged from the nozzle d return, as usual, through a passage in the
body to the forward end of the second nozzle c', through which and the nozzle d¹
they pass to the point of discharge.
Heretofore it has been customary in this particular type of apparatus to arrange the
two series of nozzles with their axes in parallel lines. In this apparatus, the axes
of the two series of nozzles converge toward the delivery end, as plainly represented
in Figure 1, the effect of this arrangement being to bring the nozzles nearer together
at the delivery than at the receiving end.
This arrangement enables the size of the body in cross-section at the delivery end

page_text: to be reduced, thereby lessening its sectional area and causing the currents therein to
maintain their velocity as they approach the point of delivery.
In apparatus having parallel nozzles, the fluid-passages are of increased area between
the first and second nozzlès, the result of which is that the fluids, expanding during
the course of their passage, lose their velocity before entering the second nozzle,
resulting in a loss of energy, a waste of steam, and a diminished lifting effect on the
part of the apparatus.
The delivery of the steam to the nozzles b¹ is controlled by the usual valves e and e¹,
connected, by a cross-bar or lever f, to the longitudinal spindle g, which is projected
through a stuffing-box to the outside of the body and there united by a swivel
coupling to the hand-lever B, pivoted to the body of the injector at h. The admission
of water through the throat 62 is controlled by means of a vibratory valve i mounted
on a rock-shaft, which is extended through a suitable gland or stuffing-box to the
exterior of the body, and there provided with an operating-handle C, the details of
which will be hereinafter described.
The delivery-throat c² is provided, as usual, with a check-valve k opening in an
outward direction. For the purpose of initiating the operation of the apparatus the
starting or overflow-valve is provided, through which direct communication may be
established between the delivery-nozzle d¹ and the overflow-pipe m. This is, it will be
'observed, a double valve, having the portion to control the discharge from the
nozzle d', and the portion 12 to control the discharge from the nozzle d. When the
valve is open, communication is established directly from the nozzle d as well as from
the nozzle d¹ to the overflow m. This starting-valve is arranged in a vertical
position with its stem or spindle extending upward through a gland at the top of the
body, and connected by side bars n to an elbow-lever o, which is in turn connected
by side bars p to eccentrics q formed on the sides of the main lever B. The arrange-
ment is such that the movement of the lever B to open the steam-admission valves e
and e¹ will, at the same time, open the overflow or starting valve I, and thus permit
the apparatus to commence its action. A continued movement of the lever B to fully
open the steam-valves causes the closing of the overflow valve, so that the delivery is
effected wholly through the valve k.
In practice, it is found that, by arranging the overflow or starting valve in a
vertical position, its wear and the wear of its seat are rendered uniform, so that the
valve will at all times seat itself tightly, a result which cannot be secured with a valve
arranged in a horizontal position.
Referring again to the throttle-valve i, it will be observed that its operating-
spindle is seated at its ends in plates t and t¹, screwed into openings formed in the
sides of the body. These plates are interchangeable, so that the spindle may be
reversed or turned end for end to bring the operating-lever on the right or the left
side of the apparatus as its location may render desirable.
For the purpose of locking the throttle-valve in its different adjustments, the plate t
is provided with a notched flange t², and a dog t³, actuated by a spring & and arranged
to engage the flange as shown, is connected to the lever. The lever is jointed loosely
to a cap to, on the end of the spindle, so that, by moving it laterally, it will effect the
disengagement of the dog.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, as communicated to me by my foreign
correspondent, I declare that what I claim is :-
1. In a duplex injector in which the fluids discharged from the first nozzle are
returned and delivered to the second nozzle, the body diminishing in size toward the
delivery end, in combination with the two nozzles arranged therein side by side in
lines converging toward the delivery end, whereby the velocity of the fluids
discharged from the first nozzle is maintained during their passage therefrom to
the second nozzle.
2. In a duplex injector, the converging nozzles arranged side by side in lines
converging toward the delivery end, in combination with the enclosing-body reduced

page_text: in size internally toward its delivery end and provided with the passage for
returning the fluids from the delivery end of one nozzle to the receiving end of
the other.
3. In an injector, the lever B, controlling the steam-admission, in combination with
the eccentrics thereon, the connecting bar p, the lever o, the link n, and overflow-
valve l.
4. In a duplex injector having substantially horizontal nozzles and the enclosing-
body, the vertically-reciprocating starting-valves ² 12.
11
.
1800
WM. P. THOMPSON & Co.,
Agents for the Applicant.