Improved Apparatus for Preventing the Incrustation of the Tubes of Multitubular Boilers.
Year: 1887

page_text: Date of Application, 26th Jan., 1887-
Complete Left, 13th Sept., 1887
Complete Accepted, 14th Oct, 1887
PROVISIONAL SPECIFICATION.
Improved Apparatus for Preventing the Incrustation of the Tubes
of Multitubular Boilers.
We JAMES BARBER of 601 Ashton Road Openshaw in the County of Lancaster,
boiler maker, and JOSEPH FORTUNE of the same place letter-press-printer do hereby
declare the nature of this invention to be as follows:-
Hitherto great inconvenience and loss of heating power has been caused in
multibular boilers (more especially in locomotive and marine boilers) by incrustation
caused by the deposition on the outer surface of the tubes of substances arising from
impurities in the water; for example a boiler after having been in use for (say) two
years becomes completely choked up with incrustation amongst the central tubes, so
that there is no room for the passage of water between them, and thus the best
beating portion of the boiler is lost the only way of removing which incrustation
has hitherto been by taking out the tubes and cleaning them causing both considerable
expense for both labor and material as well as loss of time.
The object of our invention is to obviate this inconvenience by preventing the
formation of the deposit or removing it before it has been able to assume a sufficient
thickness or solidity to cause any loss of heating power, by which means we not only
obviate the necessity for removing and cleaning the tubes from time to time but also
prevent the great waste of fuel caused by the incrustation on the outside of the
tubes.
According to our invention we place inside the boiler, near to the front plate, a
perforated steel plate through which all the tubes pass, the perforations being about
one quarter of an inch larger than the outer circumference of the tubes so as to allow
of the plate freely sliding upon the latter.
On this plate in corresponding positions we place two studs opposite two plug holes
in the tube plate.
When the tubes are to be cleaned the plugs are removed and two bars or rods are
passed through the holes and screwed onto the studs in the perforated steel plate
(which should be done every time that the boiler is washed out) and it will now be
P

page_text: evident that by moving the perforated plate to and fro on the tubes by means of the
rods or bars the tubes will be cleaned from any deposit that may have settled thereon
and thus no incrustation will be allowed to form.
To prevent the wearing of the screw thread in the plug holes by the working to
and fro of the rods or bars thereon after removing the plugs we screw into the holes
brass ferrules, which are made hollow so that the bars or rods can work through
them.

page_text: COMPLETE SPECIFICATION.
Improved Apparatus for Preventing the Incrustation of the Tubes
of Multitubular Boilers.
We JAMES BARBER of 601 Ashton Road Openshaw in the County of Lancaster
boiler maker and JOSEPH FORTUNE of the same place Letter-press-printer do heroby
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:
Hitherto great inconvenience and loss of heating power has been caused in multi-
tubular boilers (more especially in locomotive and marine boilers) by incrustation
caused by the deposition on the outer surface of the tubes of substances arising from
impurities in the water: for example a boiler after having been in use for (say) two
years becomes completely choked up with incrustation amongst the central tubes, so
that there is no room for the passage of water between them, and thus the best
heating portion of the boiler is lost. The only way of removing which incrustation has
hitherto been by taking out the tubes and cleaning them, causing both considerable
expense for both labor and material, as well as loss of time.
The object of our invention is to obviate this inconvenience by preventing the
formation of the deposit or removing it before it has been able to assume a sufficient
thickness or solidity to cause any loss of heating power, by which means we not only
obviate the necessity for removing and cleansing the tubes from time to time but also
prevent the great waste of fuel caused by the incrustation on the outside of the
tubes.
The nature of our said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference to
the accompanying drawings and the following explanation thereof.
Fig. 1. on Sheet 1. of the drawings is a transverse section through the smoke box
of a multitubular boiler showing the application of our invention thereto, and Fig. 2
is a partial longitudinal section taken vertically through the same. Figs. 3 and 4, are
enlarged detached views of portions of the same hereinafter more particularly referred
to. Fig. 5 (Sheet 2) is a partial section similar to Fig. 2. but taken in a horizontal
direction.
According to our invention we place inside the water space of the boiler a, a near
to the front or tube plate b, b of the smoke box a perforated steel plate c, c through
which all the tubes d, d pass, the perforations being about one quarter of an inch
larger than the outer circumference of the tubes d, d as shown by the dotted circles in
Fig. 1. so as to allow of the plate c, c freely sliding upon the latter.
On this plate c, c in corresponding positions we place two screwed studs e, e (see
Fig. 4) opposite two plug holes in the tube plate b, b.
When the tubes are to be cleaned the plugs ff are removed and two bars or
rods g, g are passed through the holes and screwed onto the studs e, e in the perforated
steel plate c, e (which should be done every time that the boiler is washed out) and it

page_text: will now be evident that by moving the perforated plate c, c to and fro on the
tubes d, d by means of the rods or bars 7, the tubes will be cleaned from any
deposit that may have settled thereon and thus no incrustation will be allowed to
form.
To prevent the wearing of the screw thread in the plug holes by the working to
and fro of the rods or bars g, g therein after removing the plugs, we screw into
the holes brass ferrules h, which are made hollow so that the bars or rods g, g can
work through them.
our said
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed we declare that what we
claim is :-
The employment in the water space of a multitubular boiler of a perforated steel
plate through which all the tubes pass, the said plate being provided with screwed
studs opposite to plug holes formed in the tube plate, in combination with rods which
can be passed through the said plug holes and screwed onto or otherwise attached to
the said studs so that when it is required to clean the exterior of the fire tubes from
incrustation the said perforated plate can by means of the rods be pushed or drawn
from end to end of the boiler sliding upon the said tubes and scraping off any
incrustation that may have formed thereon: substantially as hereinbefore described
and illustrated by the drawings annexed.
Dated this 19th day of Santamber 1907
GEORGE DAVIES,
4, St. Ann's Square, Manchester,
Agent for the Applicants.