Improvements in Fuel Economisers or Feed-water Heaters.
Year: 1894

page_text: Date of Application, 1st Dec., 1894
Complete Specification Left, 31st Aug., 1895-Accepted, 5th Oct., 1895
PROVISIONAL SPECIFICATION.
Improvements in Fuel Economisers or Feed-water Heaters.
I, ARTHUR Lowcock, of Coleham Foundry, Shrewsbury, in the County of
Salop. Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in those fuel economisers in which the
feed water is fed through a series of upright pipes placed in a chamber and heated
by the gases from the furnaces on their way to the chimney and the improvements
consist first, in obtaining an increased heating surface for an economiser pipe of a
given area, secondly in an improved scraper for such pipes and thirdly, in an
improved joint and means for securing the caps above the pipes in the upper
boxes.
According to the first improvement the economiser pipes are cast preferibly
smaller than now customary and they are provided with two, three or more, say
four fins preferably longitudinal and parallel fins, such fins adding to the heating
surface of the pipes.
Secondly, In order to scrape and clean the outside of the aforesaid improved
economiser pipes I employ an improved form of the spiral scraper for which
Letters Patent Number 1230 of 1880 were granted to George Preston. This
improved scraper consists of four scrapers where there are four fins or in other
cases as many scrapers as there are fins each scraper cleaning one side face of each
of two fins and the outer edge of one fin and the portion of the pipe between the
said fins. If in place of longitudinal and parallel fins a spiral or other fin were
employed I should employ scrapers of suitable shape to correspond.
Thirdly, At present when the caps are fittel on the outside of the upper boxes
over the economiser pipes a bolt is employed to secure each cap in position and this
bolt is objectionable; to avoid the use of an inside bolt and the difficulty of fitting
the cap from the inside of the boxes each mouth of the boxes is according to my
third improvement faced preferably with a plain straight face at right angles to the
mouth and on the outside of the mouth are cast say two slotted lugs into which
are fitted a pair of T headed bolts; the cap which has projections corresponding
to the slotted lugs is fitted on to the faced inouth and a suitable packing such as a
corrugated co per ring is placed between it and the face of the mouth, and the cap
is secured by the two bolts referred to. The lugs are placed diagonally to the
body of the box so that the caps and bolts shall not interfere with the adjoining
row or rows of boxes.
By this improved joint and cap the taper fitting surfaces of the caps are
dispensed with, the difficulty of removing the caps is overcome an internal bolts
are also dispensed with.
Dated this 30th day of November 1894
H. B. BARLOW & GILLETT,
Agents for Applicant.

page_text: Improvements in Fuel Economisers or Feed-water Heaters.
1. ARTHUR Lowcock, of Coleham Foundry, Shrewsbury, in the County of
Salop, Engineer, 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:-
This invention relates to improvements in those fuel economisers in which the
feed water is fed through a series of upright pipes placed in a chamber and heated
by the gases from the furnaces on their way to the chimney and the improvements
consist first, in obtaining an increased heating surface for an economiser pipe of a
given area, secondly in an improved scraper for such pipes, and thirdly in an
improved joint and means for securing the caps above the pipes in the upper
boxes.
According to the first improvement the economiser pipes are cast preferably
smaller than now customary and they are provided with two, three or more, say
four fins preferably longitudinal and parallel fins, such fins adding to the heating
surface of the pipes.
Secondly In order to scrape and clean the outside of the aforesaid improved
economiser pipes I employ an improved form of the spiral scraper for which
Letters Patent numbered 1230 of 1880 were granted to George Preston. This
improved scraper consists of four scrapers where there are four fins or in other
cases as many scrapers as there are fins each scraper cleaning one side face of each
of two fins and the outer edge of one fin and the portion of the pipe between the
said fins. If in place of longitudinal and parallel fins a spiral or other fin were
employed I should employ scrapers of suitable shape to correspond.
Thirdly, At present when the caps are fitted on the outside of the upper boxes
over the economiser pipes a bolt is employed to secure each cap in position and
this bolt is objectionable; to avoid the use of an inside bolt and the difficulty of
fitting the cap from the inside of the boxes each mouth of the boxes is according
to my third improvement faced preferably with a plain straight face at right angles
to the month and on the outside of the month are cast two slotted lugs into which
are fitted a pair of headed bolts; the cap which has projections corresponding
to the slotted legs is fitted on to the fared mouth and a suitable parking aches
2 corrugated repor rig isla date it and the
☐ the
cap is secured by the two bolts referri to. The lugs are placed diagonally to
the body of the box so that the caps and bolts shall not interfere with the adjoining
low or rows of boxes.
By this grovel joint and cap the toper fitting meters of the rep pre di por ed
with, the difficulty of removing the caps is overeme and internal bolts are also
dispensed with.
And in order that my invention may be fully understood and readily carried
into effect will describe the accompanying three sheets of drawings reference
being had to the figures and letters marked thereon.
Figs. 1 and 2 are side elevation and plan respectively of an economiser pipe
made according to my invention Fig. 3 is a longitudinal section of Fig. 1 and
Fig. 4 is a transverse section on the line A B, Fig. 3.
Fig. 5 is a side elevation of part of the pipe shown in Fig. 1 to which one of
my improved scrapers is applied and Fig. 6 is a transverse section on the line C D,
Fig. 5.
Fig. 7 is a side elevation of part of one of the top boxes fitted with two of my
improved cap. Fig. 8 is a plan view of Fig. 7.
Similar letters refer to similar parts throughout the several views.

page_text: In Figs. 1 to 6,-a represents one of the economiser pipes of smaller diameter
internally than now customary and provided on its exterior with four longitudinal
and parallel fins a' such fins adding to the heating surface of the pipes.
In Figs. 5 and 6 one of the improved scrapers 6 is shown in its working
position on the pipe a; one end of the scraper 6, as clearly shown in Fig. 6, acts
upon and scrapes one side face of each of two adjoining fins and the outer edge
of one fin as well as the portion of the pipe between the said fins, and the other
end of the scraper cleans the corresponding surfaces on the opposite pair of fins.
When there are three or four fins on a pipe I propose to employ as many scrapers
as there are fins; but any other suitable number may be employed and prefer
to arrange them substantially as described in the Specification to Preston's said
Patent. In this case the other scrapers, which are not shown, act upon and clean
the other portions of the pipe not cleaned by the first scraper. Each scraper is
raised and lowered by means of the usual reciprocating scraper bar which acts
upon the tabs or lugs ¹.
In Figs. 7 and 8,- c represents a portion of a top box to which the pipes a, not
shown, are connected; over each pipe a is cast on the top box c a mouth piece c¹
the top of which is turned or faced at right angles to the mouth; on the outside
of the mouth are cast lugs e² with slots into which slots are fitted square or
T headed bolts d which pass through holes in the caps e and which are secured
upon the mouth pieces c¹ by nuts d'. The lugs are set diagonally, see Fig. 8, in
order that the caps in one row may not interfere with the adjoining row or rows
of top boxes. A corrugated copper gasket or a suitable washer may be placed
between the cap and mouth piece so as to make a steam tight joint.
In place of lugs with slots and T headed bolts, a flange might be cast round the
exterior of the mouth piece and hooked bolts which catch under the flange be
employed to secure the cap in position.
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:-
In a fuel economiser-
1. An economiser pipe provided with a fin, or two or more, say four, fins on its
exterior surface substantially as and for the purposes described and as illustrated
in the accompanying drawings.
2. The combination with an economiser pipe having an external fin or fins, of
any suitable number of scrapers arranged to clean the same substantially as and
for the purposes described with reference to Figs. 5 and 6.
3. The improved joint aud means for securing the caps in position above the
pipes in the top boxes by outside bolts substantially as and for the purpose
described.
Dated this 30th day of August 1895.
H. B. BARLOW & GILLETT,
17 St. Ann's Square, Manchester, Agents for Applicant.