IMPROVED APPLIANCES " FOR PREVENTING DIRT FROM PASSING INTO PIPES OR PASSAGES USED FOR CON- VEYING STEAM WATER OR OTHER FLUID AND FOR THE PREVENTION OF PRIMING
Year: 1885

page_text: PROVISIONAL SPECIFICATION.
I, JOHN KIRKALDY of 40 West India Dock Road in the County of Middlesex
Engineer do hereby declare the nature of my invention for " IMPROVED APPLIANCES
"
FOR PREVENTING DIRT FROM PASSING INTO PIPES OR PASSAGES USED FOR CON-
VEYING STEAM WATER OR OTHER FLUID AND FOR THE PREVENTION OF PRIMING
to be as follows:-
This invention has more especially for its object to provide an appliance for pre-
venting the entrance of dirt of any kind into tubular surface condensers or steam
boilers in which the tubular surface is composed of helical coils of tube, but it is
also applicable in other cases where it is desired to prevent the passage of dirt
through other pipes or passages used for conveying steam water or other fluid, it
can also be used advantageously for the prevention of priming in steam boilers
used for supplying steam to steain engines that is to hinder water being carried
over with the steam to the cylinders of the engine.
For this purpose I employ a perforated partition or grating placed across a
chamber provided with inlet and outlet passages one on one side and the other on
the opposite side of the grating so that the steam water or other fluid in its passage
through the chamber has to pass through the perforations.
In order that the grating may from time to time be readily removed to clear off
from it any dirt which it may have arrested I make the grating as a slide which
can be passed end wise into its place within the chamber through an opening at one
at its ends. The inner end of the slide I provide with a screw bolt extending from
it to pass through a hole in the end of the chamber opposite to that end from which
the slide is inserted and on to the end of the bolt which protrudes from the chamber
I screw a nut the inner end of which I make somewhat conical to fit into a corre-
sponding recess on the exterior of the chamber so that when screwed up it makes
a steam tight joint without packing. The nut also I make as a cap nut to prevent
escape of steam or fluid between the screw and the screw thread in the nut.
The opposite end of the slide I form with a flange around it to be drawn against
a corresponding surface on the exterior of the casing and thereby form a tight
joint.
The perforations in the transverse partition or grating may either be immediately
between the inlet and outlet passages of the chamber or the chamber may extend

page_text: downwards or in other direction and the perforations be formed in the portion of
the transverse partition which is within this projecting portion of the chamber so
that the steam or other fluid as it first enters into the chamber may come against
a flat unperforated plate and the momentum of any solid matters carried along with
the steam or other fluid be thereby arrested and allowed to drop to the bottom
of the chamber from which they can be removed from time to time by withdrawing
the slide. In some cases I cast the shell or casing of the chamber in one piece with
another chamber in which a non return valve or stop valve is fitted.
Improved Appliances for Preventing Dirt from Passing into
Pipes or Passages Used for Conveying Steam, Water, or other
I JOHN KIRKALDY of 40 West India Dock Road in the County of Middlesex
Engineer do hereby declare the nature of my invention for "IMPROVED APPLIANCES
FOR PREVENTING DIRT FROM PASSING INTO PIPES OR PASSAGES USED FOR CON-
VEYING STEAM WATER OR OTHER FLUID AND FOR THE PREVENTION OF PRIMING
"
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This Invention has more especially for its object to provide an appliance for pre-
venting the entrance of dirt of any kind into tubular surface condensers or steam
boilers in which the tubular surface is composed of helical coils of tube, but it is
also applicable in other cases where it is desired to prevent the passage of dirt
through other pipes or passages used for conveying steam water or other fluid, it
can also be used advantageously for the prevention of priming in steam boilers used
for supplying steam to steam engines that is to binder water being carried over
with the steam to the cylinders of the Engine.
For this purpose I employ a perforated partition or grating placed across &
chamber provided with inlet and outlet passages one on one side and the other on
the opposite side of the grating so that the steam, water or other fluid in its passage
through the chamber has to pass through the perforations.
In order that the grating may from time to time be readily removed to clear off
from it any dirt which it may have arrested, I make the grating as a slide which
can be passed end wise into its place within the chamber through an opening at one
of its ends The inner end of the slide I provide with a screw bolt extending from
it to pass through a hole in the end of the chamber opposite to that end from which
the slide is inserted, and on to the end of the bolt which protrudes from the chamber

page_text: I screw a nut the inner end of which I make somewhat conical to fit into a corre-
sponding recess on the exterior of the chamber so that when screwed up it makes
a steam-tight joint without packing. The nut also I make as a cap nut to prevent
escape of steam or fluid between the screw and the screw-thread in the nut.
The opposite end of the slide I form with a flange around it to be drawn against
a corresponding surface on the exterior of the casing and thereby form a tight
joint.
The perforations in the transverse partition or grating may either be immediately
between the inlet and outlet passages of the chamber or the chamber may extend
downwards or in other direction and the perforations be formed in the portion of
the transverse partition which is within this projecting portion of the chamber so
that the steam or other fluid as it first enters into the chamber may come against a
flat unperforated plate, and the momentum of any solid matters carried along with
the steam or other fluid be thereby arrested and allowed to drop to the bottom of
the chamber from which they can be removed from time to time by withdrawing the
slide. In some cases I cast the shell or casing of the chamber in one piece with
another chamber in which a non-return valve or stop valve is fitted.
The drawings hereunto annexed show examples of dirt arresters constructed in
the manner above described.
Figure 1 shows a longitudinal section of one form of the dirt arrester and Figure 2
is an end view one half partly in section of the same. Figure 3 is a transverse
section and Figure 4 a face view of its perforated partition or grating. Figure 5 is
a side elevation one half in section and Figure 6 an end view one half in section of
the outer casing of another form of the dirt arrester in which a settling chamber
or catch pit is provided in which the matters arrested by the grating may be
deposited. Figure 7 is a transverse section and Figure 8 a face view of the grating
for the same.
Figure 9 is a longitudinal section of another form of the dirt arrester in which
the outer shell is cast in one piece with the shell or casing of a non-return valve.
Figure 10 is a longitudinal section of the dirt arrester having its shell cast in
one piece with the shell or casing of a stop valve.
A is the outer shell of the dirt arrester.
In Figure 1 it is shown to be formed at one end with a flange and at the other
end with a tubular projection having an internal screw thread cut in it for inlet
and outlet pipes to be secured to it but other ways of coupling the inlet and outlet
of the dirt arrester to inlet and outlet pipes might be adopted.
B is the perforated partition or grating extending across the interior of the
hollow shell A-its side edges fit against the sides of the shell. At the top it is
formed with a screw stem BI to project up through a short tubular projection A'
which stands up from the top of the shell. On to the screw stem is screwed a cap
nut C the underside of which is made conical as shown at C to fit within the
mouth of the projection A¹ which is correspondingly coned. In this way a tight
joint can be obtained without the use of packing. At the bottom of the shell is a
rectangular opening through which the perforated grating can be slidden into or
out of its place in the shell.
The bottom of the grating is formed with a flat plate B² at right angles to it
which covers over and extends on all sides beyond the rectangular opening. In its
upper face is a groove into which is fitted the lower end of the portion of the shell
through which this rectangular opening is formed and a tight joint is thereby
secured.
Should the perforations of the partition or grating become choked it is simply
necessary to unscrew the nut C to be able to remove the grating through the
rectangular opening in the bottom of the shell-the grating and interior of the
shell can then be quickly cleaned and the grating put back again into its place.
In the construction shown at Figures 5, 6, 7 and 8 it will be seen that the shell
is formed with a chamber D extending downwards to form a catch pit in which the
dirt arrested by the perforated grating may collect. The partition B is as shown

page_text: carried down to the bottom of the chamber D and the perforations are formed
through its lower half.
In the construction shown at Figure 9 still further provision is made for the
reception of any matters which may be arrested by the grating. A chamber E is
formed at the bottom of the partition B into which any dirt arrested by the partition
can drop through slits formed through the top of the chamber as shown. The
shell of this dirt arrester is also as shown cast in one piece with the shell or casing
of a non-return valve-The construction shown at Figure 10 differs only from that
shown at Figure 9 in that the shell of the dirt arrester is cast in one piece with the
shell or casing of an ordinary stop valve.
Dirt arresters constructed as above described can be used for preventing solid
matters being carried by the feed water to the boilers of steam engines or for pre-
venting priming that is the carrying over of water along with the steam passing
from a boiler or for preventing solid matters being carried along with the exhaust
steam from a steam engine into the condenser and is especially useful when the
condenser is a tubular surface condenser in which the tubular surface is composed
of helical coils of tube-they can also be used in a variety of other cases wherever
it is desired to arrest the passage of solid matter.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performned I declare that what
I claim is
1. The construction of appliances for preventing dirt from passing into pipes or
passages used for conveying steam, water or other fluid and for the prevention
of priming of a hollow chamber formed with an inlet and outlet and fitted with a
perforated partition which passes across its interior and which partition can be
withdrawn end wise to admit of its being cleaned whenever required without
disturbing the hollow chamber itself substantially as described.
2. The construction of appliances for arresting dirt or priming substantially as
hereinbefore described and illustrated at Figures 1. 2. 3. and 4.
3. The construction of appliances for arresting dirt or priming substantially as
herein before described and illustrated at Figures 5, 6, 7 and 8,
4. The construction of appliances for arresting dirt or priming substantially as
herein before described and illustrated at Figure 9.
5. The construction of appliances for arresting dirt or priming substantially as
herein before described and illustrated at Figure 10.
Dalal thin with dow of : 100-