IMPROVEMENTS IN OR APPLICABLE TO ARRANGEMENTS OR APPARATUS FOR HEATING FEED WATER, TERMED ECONOMISERS
Year: 1871

page_text: LETTERS PATENT to Edward Mundy, of Stalybridge, in the County
.
of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN OR
APPLICABLE TO ARRANGEMENTS OR APPARATUS FOR HEATING FEED WATER,
TERMED ECONOMISERS.”
PROVISIONAL SPECIFICATION left by the said Edward Mundy at the
Office of the Commissioners of Patents, with his Petition, on the
26th October 1871.
"
I, EDWARD MUNDY, of Stalybridge, in the County of Lancaster,
Engineer, do hereby declare the nature of the said Invention for IM-
PROVEMENTS IN OR APPLICABLE TO ARRANGEMENTS OR APPARATUS FOR HEATING
FEED WATER, TERMED ECONOMISERS," to be as follows :―
My Invention relates to those arrangements of vertical pipes or tubes
which are placed in the flues of steam boiler and other furnaces for
O heating water by the waste heat passing to the chimney, and my
Invention refers to an improved arrangement of the scrapers used

page_text: for keeping the surfaces of the pipes or tubes free from soot, which
arrangement consists of a series of segments that entirely encircle each
tube or pipe when in their places. There are two sets of segments, one
above the other, for each pipe or tube, and each pair of segments is
connected by a bar which has a projection upon it that rests upon the
bevelled edge of a ring or hoop that encircles the whole of the segments.
The weight of the segments resting upon the incline acts to keep the
upper and lower scraping edges of each segment close against the pipe
or tube, while the encircling hoop is moved slowly up and down by
any of the ordinary arrangements for this purpose.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Mundy in the Great Seal Patent Office on
the 22nd April 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
MUNDY, of Stalybridge, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of October, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Edward Mundy, Her special license
that I, the said Edward Mundy, my executors, administrators, and
assigns, or such others as I, the said Edward Mundy, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN OR
APPLICABLE TO ARRANGEMENTS OR APPARATUS FOR HEATING FEED WATER, TERMED
ECONOMISERS,' upon the condition (amongst others) that I, the said
Edward Mundy, by an instrument in writing under my hand and seal,
should particularly describe and ascertain the nature of the said Inven-
tion, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
montlis next and immediately after the date of the said Letters Patent.
$
" "

page_text: NOW KNOW YE, that I, the said Edward Mundy, do hereby declare
the nature of my said Invention; and in what manner the same is to
be performed, to be particularly described and ascertained in and
by the following statement and the accompanying Drawings (that is
to say):
:―
My Invention relates to those arrangements of vertical pipes or tubes,
which are placed in the flues of steam boiler and other furnaces for
heating water by the waste heat passing to the chimney, and my
Invention refers to an improved combination and arrangement of the
scrapers used for keeping the surfaces of the pipes or tubes free from
soot, which combination and arrangement consists of a scries of segments
'that entirely encircle each tube or pipe when in their places. There are
two sets of segments, one above the other, for cach pipe or tube, and
cach pair of segments is connected by a bar which has an inclined
projection upon it that rests upon the bevilled edge of a ring or hoop
that encircles the whole of the segments. The weight of the segments
and connecting bars acting vertically and resting upon the incline of
the hoop tends to wedge the segments with more or less pressure
varying with the degree of inclination against the pipes or tubes, while
the encircling hoop (which is left free horizontally to accommodate itself
to the pipe or tube) is moved slowly up and down by any of the ordinary
arrangements for this purpose.
Fig. 1 is a side view, and Fig. 2 is an end view, Fig. 3 is a section,
and Fig. 4 an end view illustrating my improved scrapers. The tubes or
pipes of some economisers are only made to communicate with each
other at their upper ends, there are other economisers in which the tubes
or pipes communicate at both their upper and lower ends.
Figs. 1 and 2 show the arrangement applicable to the former, and
Figs. 3 and 4 the arrangement applicable to the latter class of econo-
misers, the only difference being that the encircling hoop may be solid
in the first case, and must be made in two halves bolted or otherwise
held together in the latter case.
a is a part of one of the tubes or pipes to be scraped; b, the scrapers
in three segments. (though four or more may be used). Each pair of
segments is connected by a bar b', which has two projections, onc
inclined as shown in Fig 3, the other square, the inclined projection b
upon each connecting bar (6¹) rests upon the bevil at the upper edge
of the hoop c, and the vertical weight acts to wedge the segments

page_text: against the pipe or tube (a.) The square projection
.
prevents the
accidental lifting of the segments from the hoop. Each hoop has four
projections c¹ that rest upon cross bars d carried by the frame that is
moved up and down by any of the ordinary mechanism used to actuate
scrapers, and the cross bars have projections which come between
those (c) from the hoops, which are left so as to be capable of moving
horizontally to some extent to allow the hoop (c) for cach set of seg-
ments to accommodate itself to its pipe or tube, which may vary to
some extent from its true vertical position, or one pipe may not be quite
parallel to another. In Figs. 3 and 4 the hoop is made in two halves
and bolted together by bolts (c) passing through parts when placed
round the pipe. The segments may be arranged so that the slight spaces
left between them will not come vertically over each other, as shown, by
making the upper segments 6 a little more on one side of the connecting
bar b', and the lower segments 6* a little more on the other side of the bar,
and thus one set of scrapers will cover the slight spaces left unacted upon
by the other set of scrapers. I have now particularly described the nature
of my Invention and the manner of carrying it into effect, and claim
as my Invention the combination and arrangement of segmental scrapers
in pairs, so that their weight acting vertically will cause them to wedge
against a hoop (c) or its equivalent, and press upon the pipe or tube to
be scraped, substantially as herein-before described and illustrated by
the Drawings.
b
In witness whereof, I, the said Edward Mundy, have hereunto set
my hand and seal, this Twentieth day of April, in the year of
our Lord One thousand eight hundred and seventy-two.
Witness,
PETER J. LIVSEY,
Patent Agent,
Manchester.
EDWARD MUNDY. (L.S.)