Improvements in Boilers for Hot-water Heating Apparatus.
Year: 1891

page_text: Date of Application, 9th June, 1891
Complete Specification Left, 9th Mar., 1892-Accepted, 16th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Boilers for Hot-water Heating Apparatus.
We, JOSEPH MATHER and JONATHAN KITCHEN, Welded Boiler Works,
Derby, in the County of Derby, Boiler Manufacturers, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to an improved upright wrought welded or rivetted boiler
for hot water heating apparatus whereby the heating surface thereof is greatly
increased.
It is usual in many boilers of this class for the draught to take a direct line
from the fire bars to the smoke flue, but in carrying out our invention we employ
one or more waterway midfeathers projecting from the sides of the boiler towards
the interior thereof, thus causing the heated gases to travel backwards and forwards
or from side to side in such a manner that they are compelled to impinge upon all
the internal surfaces of the boiler, to effect this end we find it advantageous to
arrange the waterway midfeathers or shelves to project beyond the centre line of
the fire box. The number of midfeathers or shelves required will vary with the
size of the boiler and the amount of pipe to be heated.
It will be seen that by our arrangement of midfeathers or shelves described
above we add largely to the heating surface without increasing the grate surface,.
the external dimensions of the boiler or the amount of fuel consumed, thus securing
a great advantage over the vertical boilers generally in use, in which the flame and
heated gases are allowed to take a direct course from the fire bars to the smoke
flue thereby allowing a great portion of the heat generated to pass away without
being utilized.
We may arrange cleaning doors in the sides of the boiler for cleaning the
heating surfaces formed by the midfeathers or shelves of any accumulation of soot,
and our invention is equally applicable to independent or self contained boilers and
to boilers built in brickwork.
The fire or feed door may be placed at the front of the boiler sufficiently high
from the fire bars to leave a fire box capable of holding fuel for burning from
twelve to twenty hours without attention. The clinker or cleaning door and ash-
pit door are placed directly underneath and in front of the boiler, in the usual
positions, and the smoke flue may be placed either at the top or side of the boiler
to suit any position.
Dated this 6th day of June 1891.
JOSEPH MATHER,
J. KITCHEN,
Applicants.
COMPLETE SPECIFICATION.
Improvements in Boilers for Hot-water Heating Apparatus.
We, JOSEPH MATHER and JONATHAN KITCHEN of the Welded Boiler Works,
Derby, in the County of Derby, Engineers 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 :-
The object of our invention is to provide a boiler for hot water heating
apparatuses which shall present as much heating surface as possible to the flame
and one which will ensure an easy and rapid circulation of hot water, will
economise fuel and being circular in form will be capable of working under heavy
pressures.

page_text: In order that our invention may be the more readily understood we have cause
to be annexed to this Specification a sheet of drawings and to the figures and
letters of reference marked thereon we now refer.
Figure 1 is a section of our improved boiler as set in brickwork, the section being
taken on line " a" "a" of Figure 4.
Figure 2 is a section on line """" of Figure 4.
Figure 3 is a front elevation.
Figure 4 is a plan on line """" of Figure 1.
In carrying out our invention we provide one or more waterway midfeathers A
projecting inwardly from the sides of the boiler B and overhanging the fire C, the
number of such midfeathers varying according to the size and power of the boiler,
the drawings shew one only but when two or more are used they are placed or
arranged alternately on the sides as shewn by dotted lines A.' on Figure 1; this
causes the flame and heated gases to impinge keenly on the various surfaces and
crown B of the boiler thus obtaining a greater amount of heating surface than
with the ordinary boiler and effecting a more perfect combustion of the fuel before
reaching the chimney, the heated gases taking the course shewn by the arrows on
the drawings and escaping through the flue D.
E is the flow pipe, F the return, G the feed door, H the clinker door, I the ash-
pit door, J the soot door and K the fire bars.
It is evident that our invention may be applied equally well to independent
boilers as to boilers set in brickwork.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The arrangement of waterway midfeather or midfeathers applied to wrought
welded vertical cylindrical boilers for hot water heating apparatuses substantially
as described herein and illustrated by the accompanying sheet of drawings.
Dated this 8th day of March 1892.
W. SWINDELL,
Agent for the Applicants.