Appliance for Contracting or Concentrating Steam in Engine Steam Pipes and in other Steam Conduits and Passages.
Year: 1898

page_text: Date of Application, 26th Aug., 1898
Complete Specification Left, 25th May, 1899-Accepted, 8th July, 1899
PROVISIONAL SPECIFICATION.
Appliance for Contracting or Concentrating Steam in Engine Steam
Pipes and in other Steam Conduits and Passages.
I, PETER CRERAR JOHNSON, of 119, South Park Street, Halifax, Nova Scotia,
Master Mariner, do hereby declare the nature of this invention to be as follows:-
-
This invention consists in an appliance for contracting steam at a point in its
flow through pipes and other conduits. By this means increased efficiency is
obtained. The appliance consists, according to one form, of a flanged nozzle.
The nozzle is preferably conical, the smaller end being furthest from the flange.
The diameter of the nozzle, where it is largest, is less than that of the steam
pipe or conduit. By the flange, which constitutes the back of the appliance, the
latter is bolted or otherwise secured in place. Its situation is at any suitable
point between the boiler and the place of application of the steam such as a
cylinder or valve chest. It may be fixed to the boiler. The flange of the
appliance obstructs the passage of the steam which is thus compelled to pass
through the passage of smaller diameter than the steam pipe, and thus the
steam in front of the nozzle is forced to the work with increased energy by the
concentration of the body of steam as it flows through the nozzle.
According to another form, the nozzle is dispensed with; there being simply
an aperture in the flange for the passage of steam. The aperture is smaller in
diameter than the pipe or passage in which the appliance is placed.
Instead of being flanged, the nozzle may be cast or otherwise incorporated
with the pipe, steam chest or other steam passage in which it is situated.
Dated this 25th day of August 1898.
Appliance for Contracting or Concentrating Steam in Engine Steam
Pipes and in other Steam Conduits and Passages.
I, PETER CRERAR JOHNSON, of 119, South Park Street, Halifax, Nova Scotia,
Master Mariner, 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 consists in an appliance for contracting steam at any suitable
or desired point in its flow through pipes and other conduits. By the use of
the appliance increased efficiency is obtained.
The appliance which constitutes this invention consists, according to one
form, of a flanged nozzle. The nozzle is preferably conical, the smaller end

page_text: being furthest from the flange. By the flange the appliance is bolted or other-
wise secured in place. Its situation is at any suitable point between the boiler
and the place of application of the steam, such as the cylinder of a steam engine.
It may be fixed to the boiler. It is so placed that the steam enters it at the
larger end. In its passage through the appliance the steam is contracted and its
energy concentrated.
Under another form the appliance has a flange situated towards the smaller
or delivery end of the nozzle.
According to another form, more particularly adapted for use in pipes and
passages of smaller diameter, the appliance consists of a disc having an aperture
made therein for the passage of the steam. It has no projecting nozzle. The
aperture is conical.
According to another arrangement, the passage for contracting and concen-
trating the steam is incorporated with the pipe, steam chest, or other steam
passage in which it is situated.
At Fig. 1 of the accompanying drawings is shown in section my steam con-
tracting and concentrating appliance made in accordance with one of the forms
which it may take. Fig. 2 is an end view thereof. At Fig. 3 the appliance is
shown in place in a steam pipe fl. The direction of the flow of steam is indicated
by arrows. The appliance consists of a conical nozzle 6 having a flange c ex-
tending around it towards its larger end. The appliance is secured in place
by bolts d passed through it and through the flanges a¹ of the steam pipe a.
The steam in its passage through the appliance is contracted and its energy is
concentrated on the work the steam is required to do on the smaller side of the
nozzle. One-third of the diameter of the pipe is a suitable diameter for the
smaller end of the nozzle, but it is not restricted to this. At Fig. 4 is shown in
section, and at Fig. 5 in end view, a modification according to which the flange
of the appliance is situated towards the smaller or delivery end of the nozzle.
At Fig. 6 is illustrated in section the steam contracting appliance as made
according to another form and as more particularly adapted for use in pipes and
steam passages of smaller diameter. In form the appliance consists of a disc e
having a conical aperture therein, as shown. The direction of flow of steam
is indicated by arrows. The appliance is secured in place in the steam pipe f
by the bolts g passed through the flanges of the pipe and through the disc.
At Fig. 7 is shown in section another arrangement comprised in this inven-
tion. According to this arrangement, the pipe or conduit his contracted in such
manner as to present a conical throat. The steam is contracted and concentrated
in its passage through the said throat with a like result to that hereinabove set
forth in regard to the nozzle b. The throat may be provided at the entrance
to the steam chest of the cylinder of a steam engine, or it may be situated at any
suitable point in a steam pipe or other steam conduit or passage.
Having now particularly described and ascertained the nature of this invention,
and in what manner the same is to be performed, I declare that what I claim is:
An appliance for contracting and concentrating steam in steam pipes and other
steam passages and conduits, consisting of a conical throat so placed that the steam,
in its flow from boiler to engine or other place of application enters the wider
end of the throat and is contracted and concentrated in its passage through the
throat, and passes out therefrom at the smaller end to the work to be performed,
substantially as hereinabove described with reference to the accompanying sheet
of drawings.