mproved Method of and Apparatus for Returning Exhaust Steam- to Steam Generators.
Year: 1892

page_text: Date of Application, 19th Mar., 192-Accepted, 14th May,
1892
COMPLETE SPECIFICATION.
mproved Method of and Apparatus for Returning Exhaust Steam- to
Steam Generators.
I MARTIN ROSE RUBLE of 528 Broad Street Newark in the County of Essex,
State of New Jersey, United States of America, Machinist, do hereby declare the
ature of this invention and in what manner the same is to be performed, to be
articularly described and ascertained in and by the following statement:-
The object of this invention is to produce a centrifugal steam injector, whereby
he direct exhaust steam from the cylinder can be driven back into the boiler with-
ut first condensing it, as in the ordinary manner.
The invention consists in the improved method or process of injecting exhaust
team into a boiler by means of centrifugal force, and in the improved centrifugal
team injector and the arrangement and combination of the various parts thereof,
ubstantially as will be hereinafter more fully described and finally embodied in the
clauses of the claim.
Referring to the accompanying drawings in which like letters of reference indicate
corresponding parts in each of the several figures:
Fig. 1 is a side view of a centrifugal steam injector embodying my improvement:
Fig. 2 is a front view with the front plate and small steam drum removed showing
the arrangements of the parts:
Fig. 3 is a full cross section taken on line y. Fig. 2:
Fig. 4 is a sectional view of the wheel on line Fig. 1:
Fig. 5 is an enlarged plan view of one of the combined fans and steam passages:
Fig. 6 is a cross section on line . Fig. 1:
Fig. 7 is a view similar to Fig. 4 but showing rounded steam passages instoad
of flat ones, a portion of the steam drum being shown in full :
Fig. 8 is a plan view of one of the fans and rounded steam passages with its valve,
and
Fig. 9 is an enlarged central vertical section of the valve.
In said drawings A indicates a driving shaft revolving in bearings Con
standards D and provided with loose and fixed driving pulleys E: Upon said
shaft but not revolving with it is arranged a steam receiving drum F with another
large steam drum G secured thereto by bolts as shown in Fig. 1 and resting in
frame H (Figs. 1 and 2). The back plate of the drum F to which the drum G is
secured is made of one piece with the shell of the drum, the shell portion being so
constructed as to form a bearing a on which the shaft revolves, an air chamber b
and steam chamber e as clearly shown in Fig. 3.
Within the drum G and secured to the shaft by a key or in any desired manner,
is a collar d from which extend radial arms e supporting and revolving with them
a hollow drum thus forming a chamber for receiving the exhaust steam from the
drum F as shewn in Figs. 2, 4 and 7.
Upon the outer periphery of the drum fare firmly secured in any desired
manner a series of curved angular blades 9 and are so arranged on the drum that
the series shall form a true continuous screw as shewn in dotted lines in Fig. 1.
These blades extend outward far enough to snugly fit within the inner periphery
of the drum G and are provided with forward extended flanges h. Upon the rear
of the blades g are firmly secured thereto steam passages n. These passages can be
made flat as shown in Figs. 2, 4 and 5, or round as shown in Figs. 7 and 8, and
extend from near the outer edge of the blades g down to and through the drum f
and opening into the exhaust steam chamber formed between the drum f. and
the collar d'as shown in Figs. 2, 3, 4 and 7, the rear of said steam passiges being

page_text: extended down, and secured to the collar d, forming curved fan blades i as shown
in said figures. Connected with the steam chamber e in drum F and opening into
it is a steam pipe m, connected at the other end with the exhaust pipe or chamber
of a steam engine. When a flat steam passage is used the outer opening can be
curved if desired as shown at n¹ Fig. 2.
When a rounded steam passage is used, it is secured to the blade in the same
manner as the flat passage and is provided at its outer end with a valve, preferably
a check valve o as shown in Figs. 7, 8 and 9, the inner end of said rounded passages
terminating in a similar flat fan blade i. The plug or spindle of the check valve o
is provided with openings o' to allow of the passage of the steam when the said
valve o is raised from its seat o' by the steam pressure in passage n. The outer end
of the rounded steam passage can be bent backward, if desired, and aid the centri-
fugal force by acting as a siphon.
In the rear plate of the steam drum G are openings p shown in dotted lines in
Fig. 2 in which are secured one end of a series of inwardly converging and extending
pipes the other ends of said pipes being secured in the large end of a cone
chambers, the small end of said cone chamber being connected with a pipet leading
directly into the boiler. The pipe t and cones are supported and held firmly in
position by a standard or post u in which they rest.
The driving shaft at the outside of the drums F and G should be provided with a
bushing or any other steam tight packing to prevent the escape of steam from the
drums around the shaft.
In the pipet and between the cone chambers and the boiler, a stop cock or check
valve should be inserted to prevent the return of steam from the boiler when the
injector is not in operation.
By surrounding the shaft bearing in the drum F with an air chamber as shown
in Fig. 3 the shaft is prevented from being unduly heated by the steam in the
drum.
My improved injector can be used in connection with steam, water, air or other
fluids under pressure.
In operating my device the pipe m is first connected with the exhaust steam
passage of the cylinder, and the pipe t, with the pipe connected with the boiler.
The valve in the pipe being then opened, the drum set in motion in the direction
shown by the arrow in Fig. 2 and the blades and fans revolve with it.
The exhaust steam passes through pipe m into the steam chamber c in drum F
and thence into the exhaust steam chamber surrounding the collar d in drum G and
impinges upon the revolving fans i by which it is forced by centrifugal action into
and through the steam passages and is compressed into the spaces between the
plates in the drum G and again by the centrifugal action of the plates g is forced
through the openings p and pipes into the pipe i and thence into the boiler.
The speed of the mechanism of the device should be such that the centrifugal
force exerted upon the steam as it passes through the injector should exceed the
steam pressure in the boiler.
g
The series of blades being so placed on the drum f as to form a continuous
perfect screw there can be no back action of the steam, retarding the motion of the
blades and the extending flanges h aid in guiding the steam into the pipes connecting
with the boiler, and also serve to prevent any escape of steam over the outer edge
of the blade into the rear space.
The object and purpose of the inner drum f. is to partially fill up the central
space in the steam drum G and by placing the blades g on the outside of this inner
drum instead of having them extend down to the shaft, all counteracting currents
that might be engendered are entirely avoided.
When it is desired to exhaust into the open air or any place where there is no
back pressure to be overcome, the centrifugal action of the injector will create a
vacuum in the cylinder, removing the back pressure of the steam therein and thus
facilitating the motion of the piston.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The improved centrifugal steam injector herein described consisting of a steam
drum connected with the exhaust of a steam cylinder-a drum within said steam
drum secured to a revolving shaft-a series of blades arranged on the outer periphery
of said inner drum in the form of a continuous perfect screw-steam passages
secured to the rear of said blades and extending down and through said inner
drum-fans secured to the base of said steam passages and within the exhaust steam
receiving and converging pipes connecting said steam drum through openings in
its rear plate directly with the boiler, all said parts being arranged and adapted to
operate substantially as described and for the purposes set forth.
2. In a steam injector a centrifugal injecting mechanism consisting of a stationary
steam drum connected with the boiler and with the exhaust chamber of a steam
cylinder-a hollow drum adapted to revolve within said steam drum-a series of
blades secured to the outer periphery of said inner drum in the form of a continuous
perfect screw-steam passages secured to said blades and extending through said
inner drum and fans connected to said steam passages-all said parts being arranged
and adapted to centrifugally force the exhaust steam through said steam-drum into
the boiler substantially as described and set forth.
3. In a centrifugal steam injector the combination with a steam drum, centrifugal
mechanism within said drum-and a driving shaft of an auxiliary steam drum
connected to said first mentioned drum and provided with a bearing for said shaft,
and an air chamber between said bearing and the steam chamber substantially as
described and for the purposes set forth.
4. In a centrifugal steam injector an inner drum f. secured to the driving shaft
and arranged between the inner periphery of an outer steam drum and the outer
periphery of the exhaust steam chamber, substantially as described and for the
purposes set forth.
5. The method or process substantially as herein described of injecting exhaust
steam into a boiler, consisting in conducting the exhaust steam into a steam drum,
forcing the steam by revolving fans into steam passages, and then driving the steam
by centrifugal force through said passages into the outer portion of said drum under
great pressure, and then by the action of revolving blades forcing it through the
pipes into the boiler.
Дисипативу от макси 1004.
BONNE & Co.,
57 & 58, Chancery Lane, W.C., Authorised Patent and Trade Mark Agents.