IMPROVEMENTS IN INIECTORS
Year: 1879

page_text: LETTERS PATENT to Alfred Hodgson Smith, of the Town and County of the
Town of Nottingham, Brass Founder, for the Invention of "IMPROVEMENTS IN
INIECTORS"
Sealed the 7th November 1879, and dated the 26th June 1879.
PROVISIONAL SPECIFICATION left by the said Alfred Hodgson Smith at the
Office of the Commissioners of Patents on the 20th June 1879.
ALFRED HODGSON SMITH, of the Town and County of the Town of Nottingham,
Brass Founder. "IMPROVEMENTS IN INJECTORS."
I employ several forms of injectors, but whatever the form employed each injector
consists of the following parts, namely, an outer case having an inlet orifice and an
outlet orifice. The inlet orifice is screw-threaded to receive the screw-threaded,
portion of a tube, which is formed on the outside of the case, of a shape suitable to
receive a wrench and wheel or lever. The portion of the tube inside the outer case
is cone-shaped and accurately turned and proportioned to fit a cone bored out in the
outer case; the first named cone is screw-threaded to receive the steam-connections
or a union joint to connect to a steam-pipe. The outlet orifice is the termination
of a tube which forms the continuation of the point of the cone in the interior of
the outer case; this outlet is screw-threaded to connect it to the injection-pipe.
The outer case may have one other inlet orifice formed in it, and such orifice may
he screw-threaded to receive a connection to a water supply; or if the outer case is
of suitable form several inlet orifices may be formed therein. Such case may then
be immersed in water above or below the boiler or other vessel into which the water
has to be injected. Thus, by a simple combination of one cone inserted in another,
each being accurately proportioned in relation to the other, I am enabled to lift or
force water into any boiler or other vessel where required, either above or below
the boiler or other vessel which supplies steam to the injector at any pressure.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alfred Hodgson Smith in the Great Seal Patent Office on the
20th December 1879.
ALFRED HODGSON SMITH, of the Town and County of the Town of Nottingham,
Brass Founder. "IMPROVEMENTS IN INJECTORS."
I employ several forms of injectors, but whatever form employed each injector
consists of the following parts, namely, an outer case having an inlet orifice and an
outlet orifice. The inlet orifice is screw-threaded to receive the screw threaded
portion of a tube which is formed on the outside of the casing, of a shape suitable
to receive a wrench and wheel or lever. The portion of the tube inside the outer
case is cone shaped and accurately turned and proportioned to fit a cone bored out
in the outer case.
The first named cone is screw threaded to receive the steam
connections or a union joint to connect a steam pipe. The outlet orifice is the
termination of a tube which forms the continuation of the point of the cone in the
interior of the outer case; this outlet is screw-threaded to connect it to the injection
pipe. The outer case may have one other inlet orifice formed in it, and such orifice
may be screw threaded to receive a connection to a water supply; or if the outer
case is of suitable form several inlet orifices may be formed therein. Such case may
then be immersed in water above or below the boiler or other vessel into which the
water has to be injected. Thus, by a simple combination of one cone inserted in
another, each being accurately proportionate in relation to the other, I am enabled
to lift or force water into any boiler or other vessel where required, either above
or below the boiler or other vessel which supplies steam to the injector at any
Figure 1 is a longitudinal sectional view of one form of my improved injectors,
and the fittings requisite to connect it to a steam boiler.
1
Figure 2 is a right end view of the same injector, showing an index attached to'
the water cock.
.
Figure 3 is an exterior view of another form of injector adapted for immersion in
water or other liquid.
Figure 4 is a longitudinal sectional view of a steam valve, referred to hereafter.
Figure 5 is a sectional view of a third form of injector.
The corresponding parts in each Figuro are indicated by the same letters where
necessary.
Each injector consists of the following parts, namely, an outer case A having an
inlet orifice B and an outlet orifice C. The inlet orifice is screw threaded to receive
the screw threaded portion of a tube B', which is formed on the outside of the case,
of a shape suitable to receive a wrench or lever. The portion of the tube B' inside
the outer case may be either cone shaped or screw threaded, to receive a cone D
which is accurately turned and proportioned to fit a cone E bored out in the outer
case. The cone D in each of the injectors shewn at Figures 1, 2, 3, and 5 is screw
threaded exteriorly, and portion of the bore is formed square to receive a key for
the purpose of adjusting its position to or from the delivery cone E, according to
the less or greater density of the liquid to be lifted or forced. The outer end of the
tube B' is screw threaded interiorly to receive a union joint or other connection to
attach a pipe or valve F to regulate a supply of steam. The outlet orifice is the
termination of a tube which forms the continuation of the point of the cone E in
the interior of the outer case. The outlet is screw threaded to connect it to an
injection pipe or to an overflow cock G, shewn at Figures 1 and 2, connected to an
injection pipe; the overflow cock may be provided with a back pressure valve G¹

page_text: when required. The outer case may have one or other inlet orifice H formed in it,
as shewn at Figures 1 and 5, and such orifice may be screw threaded to receive a
connection to a water or other liquid supply pipe, which may be provided with a
cock I and index, as shown at Figures 1 and 2, for regulating the supply; or, if the
outer case is of suitable form, several inlet orifices may be formed therein, as shewn
at Figure 3. Such case may then be immersed in water or other liquid above or
below the boiler or other vessel into which the liquid has to be injected, or the
instrument may be used to throw a jet of liquid where required.
The injector shewn at Figure 1 receives water or other liquid by gravitation
from a supply above the instrument, and injects it into a boiler or other receptacle
at a height varying according to the pressure of steam or compressed air employed.
The injector shewn at Figures 1 and 2 may be affixed to a steam boiler and
started into operation in the following manner:-The overflow cock G is opened,
water or other liquid is admitted through the cock I, then steam or compressed air
is admitted through the valve F, which induces a current of the liquid to pass out
through the overflow cock G, which may then be closed; the liquid being then
injected to where required may be regulated in quantity by the cock I.
By disconnecting the steam or other pressure valve F, shewn at Figure 1, and
substituting the pressure spindle shewn in section at Figure 4, the instrument will
lift and force a liquid where required at one and the same time.
Figure 5 is a sectional view of a liquid lifter constructed the same as the central
portion of Figure 1, except that the outlet cone is larger than the pressure cone.
This instrument will draw and elevate the liquid.
Thus, by a simple combination of one cone inserted in another, each being
accurately proportioned and adjusted in relation to the other, I am enabled to lift
or force a liquid into a boiler or other vessel where required, either above or below
the boiler or other vessel which supplies steam or other pressure to the injector.
In witness whereof, I, the said Alfred Hodgson Smith, have hereunto set my
hand and seal, this Nineteenth day of December, in the year of our Lord
One thousand eight hundred and seventy nine.
ALFRED HODGSON SMITH. (L.S.)