Improved Means for Preventing Incrustation in Water Tube Boilers and the like.
Year: 1895

page_text: Date of Application, 19th June, 1895
Complete Specification Left, 19th Mar., 1896-Accepted, 25th Apr., 1896
PROVISIONAL SPECIFICATION.
Improved Means for Preventing Incrustation in Water Tube Boilers
and the like.
1, THOMAS SUGDEN of Brooklyn Underhill Road Forest Hill S.E. Gentleman
do hereby declare the nature of this invention to be as follows:-
My invention is specially applicable to water tube boilers and the like and
consists with regard to water tube boilers in the employment within each tube of a
removable trough preferably made of sheet metal suitably supported and attached
to the tube so as to leave a space between the convex surface of the trough and the
lower concave surface of the tube. This trough acts to intercept and receive the
deposit from the water which would otherwise fall and settle upon the lower
concave part of the tube. A further advantage is obtained through the quickened
circulation of the water between the trough and the lower part of the tube thereby
also preventing incrustation. Trough or trays may be suitably arranged in the
down take headers or connections for the purpose of preventing incrustation at
these parts.
Dated this 19th day of June 1895.
GEO. H. RAYNER,
37 Chancery Lane, London, Agent for the Applicant.
Improved Means for Preventing Incrustation in Water Tube Boilers
and the like.
I, THOMAS SUGDEN of "Brooklyn" Underhill Road, Forest Hill, S.E. Gentleman,
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:
My invention is especially applicable to water tube boilers and the like, and
consists, with regard to water tube boilers in the employment within each tube of a
removable trough preferably made of sheet metal suitably supported and attached
to the tube so as to leave a space between the convex surface of the trough and
the lower concave surface of the tube. This trough acts to intercept and receive
the deposit from the water which would otherwise fall and settle upon the lower
concave part of the tube.
A further advantage is obtained through the quickened circulation of the water
between the trough and the lower part of the tube, thereby also preventing
incrustation.
Troughs or trays may be suitably arranged in the downtake headers or
connections for the purpose of preventing incrustation at these parts.
In order that the invention may be more clearly understood, reference is had to
the accompanying sheet of drawings in which
Fig. 1 is a general view of the arrangement of tubes in a water tube boiler,
showing my invention applied,

page_text: '
Fig. 2 shows one form of my device applied to a tube, Figs. 3 and 4 show a
similar arrangement in cross section with different modes of fitting the tray,
Figs. 5 to 10 show various modifications and
Figs. 11 and 12 show the joint or connection of the segments forming the tray.
Referring to Figs. 2, 3, 4, and 5 the tube A is provided with the removable
tray B of shallow channelled form. This tray according to Fig. 2 is simply laid
in the tube, the opposite edges being level, and situated at about the middle of the
tube in cross section. Two channels are thus formed in the tube, the upper one of
which is larger than the lower.
To prevent the tray sliding in the tube the upper end is furnished with the
projections or lips a which engage with the end of the tube as shown in Fig. 2.
The split pin a' may also be employed, passed through the end of the tray and the
extremities bent so as to grip the edge of the tube, one arm being bent inside
the tube and the other outside. This arrangement also serves to prevent the tray
turning within the tube when no other supports are used.
According to Fig. 3 small ledges or supports a² are formed inside the tube on
which the tray B rests. In the arrangement illustrated in Fig. 4 the tray is
supported on a number of small feet or posts b projecting from the underside.
These feet are placed at suitable distances apart and serve to hold the tray at the
required height. As shown in Fig. 5 the tray B is made from two lengths of angle
metal rivetted or otherwise fastened together forming an angular channel with the
support b. Fig. 6 shows another form of tray provided with a supporting plate b³
at the lower side formed from tee metal rivetted or otherwise secured to the tray.
This supporting plate may, if desired, be furnished with notches at suitable
· intervals as shown.
In the modification shown in Fig. 7 the tray B is furnished with side flanges,
the plate being bent at each side to a suitable angle. The edges of these flanges
rest on the tube at each side and support the tray. The shape of the lower channel
is slightly different in this case.
According to Fig. 8 the tray B³ is formed with the central depression or channel
and curved sides, being supported on the ledges a² as in Fig. 3. As shown in
Fig. 9 the tray B is formed with horizontal flanges at the sides, these flanges
also being supported on the ledges a². In Fig. 10 the tray B is supported as
shown in Fig. 4 by the feet or posts 6 and is made of corrugated or fluted shape.
These trays may be made in short lengths for facilitating removal for cleaning or
other purposes, the segments being connected together by suitable joints, as shown
in Fig. 11, small bolts and nuts as being employed or, as in Fig. 12, studs or pins a*
on one part taking into holes in the other. The segments are also preferably
rebated or stepped at one end to receive the extremity of the adjacent ones.
In cases where pure water is used in connection with engines worked with
surface condensers, the water becomes charged with grease. In such cases these
trays act to intercept and catch the greasy deposit in a similar way as before
described for incrustation, and thus prevents the damages consequent upon the over
heating of the tubes.
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.) In the tubes of water-tube boilers and the like, a detachable tray placed
within the tube withdrawable end-wise, substantially as, and for the purposes
specified.
(2.) In the tubes of water-tube boilers and the like a detachable tray placed
longitudinally in the tube and made in sections connected together, substantially
as, and for the purposes specified.
(3.) In the tubes of water-tube boilers and the like, a tray placed within the
tube and supported at the sides for the purpose of preventing incrustation and
promoting circulation, substantially as described.

page_text: (4.) In the tubes of water-tube boilers and the like, a tray placed longitudinally
in the tube and withdrawable from either end, for the purpose of intercepting
grease, substantially as and for the purposes specified.
Dated this 13th day of March 1896.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.