IMPROVEMENTS IN INJECTORS
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Alfred Hodgson Smith at the
Office of the Commissioners of Patents on the 17th June 1882.
a
ALFRED HODGSON SMITH, of the town and county of the town of Nottingham,
"IMPROVEMENTS IN INJECTORS,"
Each injector I construct with an outer case provided with two inlets and one
outlet, one inlet admits steam, and is provided interiorly with either a fixed cone,
or a cone capable of adjustment opposite the fixed or loose cone inside is a second
fixed or loose cone, and at one side of such cone within the case is a port or overflow
way provided with a stop valve and hand wheel, the position of the port or over-
flow way varies according to the position the injector will occupy when at work,
outside the first named fixed or adjustable cone is a spindle or stop valve for the
admission of steam. The second inlet is provided with a dial valve or cock_to
adjust the supply of water. In front of the second named fixed or loose cone, is a
straight way ball or check valve. The whole of the above named parts are con-
nected throughout by means of union joints or flanges as required. By such
means as any part is corroded or worn away, and each part being interchangeable,
at a small expense, each injector may be readily repaired.
An injector so constructed may be worked by steam direct from the boiler, or by
the exhaust steam.
And by properly adjusting the cones I can either lift or force water where
required.

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
16th December 1882.
ALFRED HODGSON SMITH, of the Town and County of the town of Nottingham.
"IMPROVEMENTS IN INJECTORS."
Each injector I construct with an outer case, provided with two inlets and one
outlet one inlet admits steam, and is provided interiorly with a fixed cone or a
cone capable of adjustment, opposite the fixed or loose cone inside is a second
fixed or loose cone, and at one side of such cone within the case is a port or over-
flow way provided with a stop valve and hand wheel, the position of the port or
overflow way varies according to the position the injector will occupy when at
work, outside the first named fixed or adjustable cone is a spindle or stop valve
for the admission of steam. The second inlet is provided with a dial valve or cock
to adjust the supply of water. In front of the second named fixed or loose cone is
a straight way ball or check valve. The whole of the above named parts are
connected throughout by means of union joints or flanges as required. By such
means as any part is corroded or worn away, and each part being interchangeable
at a small expense, each injector may be rendily repaired.
An injector so constructed may be worked by steam, direct from the boiler, or by
the exhaust steam. And by properly adjusting the cones I can either lift or force
water where required
Figures 1, 2, 3, 4, 6 and 7 are sectional views of six modifications of my improved
injectors and Figures 4ª. 4³. and 5 are views of separate parts severally referred to
hereafter
The corresponding parts in each figure are indicated by the same letters where
necessary.
Each injector I construct with an outer case A see Figures 1, 2, 3, and 4 provided
with two inlets and one outlet, one inlet S admits steam, the second inlet L admits
water or other liquid or liquids each injector is provided interiorly with either a
fixed cone B shewn at Figures 2 and 3 or a cone C capable of adjustment shewn
at Figures 1, 4, 6 and 7 opposite the fixed or adjustable cone is a second fixed
cone D shewn at Figures 1 and 4, or a cone E capable of adjustment shewn at
Figures 2, 3, 6 and 7, and at one side of the cones D and E or below them is a
port or overflow way each provided with a stop valve and hand wheel F, or stop
cock and hand lever G, the port or overflow way varies according to the position
the injector will occupy when at work. The steam inlet S, is connected to a pipe
supplying steam from the highest part of the boiler, and is provided with a spindle
or stop valve to regulate the admission of steam. The second inlet L is also
provided with a dial valve or cock to adjust the supply of liquid or liquids.
In front of the fixed cones D or adjustable cones E, is a straight way ball or
check valve H shewn only at Figure 1. The whole of the above named parts are
connected throughout by means of union joints or flanges as required. The four
injectors above described are supplied with water or other liquid or liquids, from a
tank or other vessel placed above them and forces the water or other liquid, through
the outlet I into the boiler or other vessel where required.
But by taking away the fixed cones B or the adjustable cones C, and substituting
the coned valve and spindle shewn at Figures 5, upon steam being admitted through

page_text: the inlet S, each injector is converted into a lifting and forcing injector. And by
making the steam passages B or C of three times the area, of those shown at
Figures 1, 2, 3 and 4 the injectors will work with the exhaust steam which has
already done work in the cylinder or cylinders of an engine or other vessel in which
high pressure steam is employed.
The forcing injectors are started by opening the overflow and liquid cooks, and
turning on steam gradually to allow the condensed water to escape, then close the
overflow, and the injector is at work.
The lifting and forcing injectors are started by opening the overflow cock and
turning on the steam gradually, until the liquid issues freely from the overflow upon
closing which the injector is at work.
Instead of the close lower end of the injector shown at Figure 4 provided with a
cock, I sometimes substitute a three slotted cylinder shewn respectively in side
view and plan at Figures 4 and 4 which surrounds the stem of the injector and
is partially revolved round it, by the handle until in the position shown at Figure 4³,
which places the opposite narrow slots J in position to correspond with the
thoroughfare slot K in the stem of the injector in which position the water or other
liquid may be seen through the slots as it passes to the pipes connecting the injector
to the boiler or other vessel.
The modification of injector shewn at Figure 6, may be used as a boiler feeder or
water elevator by simply immersing it in a tank or other vessel and turning on
steam, the delivery cone E may be made as shewn at Figure 6, or it may have a
lateral opening as shown at Figure 4 the water or other liquids entering through
one or more orifices L in the globe A.
The modification of injector shewn at Figure 7 lifts and forces water or other
liquid into a tank or other vessel against atmospheric pressure. In injectors
constructed as above described, when any part is corroded or worn away, each part
being interchangeable, each injector may be readily repaired at a small expense.
In witness whereof I the said Alfred Hodgson Smith, have hereunto set my
hand and seal this fourteenth day of December in the year of our Lord
One thousand eight hundred and eighty two.