Improved Methods for Supplying Air to Furnaces, and the Apparatus therefor.
Year: 1892

page_text: Date of Application, 15th Aug., 1892
Complete Specification Loft, 15th May, 1803 Accented 5th Aug
1893
PROVISIONAL SPECIFICATION.
Improved Methods for Supplying Air to Furnaces, and the Apparatus
therefor.
I, WALLACE M° GUFFIN GREAVES, 64 Fountain Street, Manchester Engineer
do hereby declare the nature of this invention to be as follows :—
It is customary to place a hood inside the door of furnaces in order to protect
the boiler. In carrying out my invention I construct this hood with a double
frame leaving an air space between the frames the said air space opening towards
the furnace. There is an opening made on each side of the hood and carried
through the dead plate into the chamber and so into the furnace. A midfeather is
inserted in the upper part of the air space so that the two currents of air do not
meet and form eddies.
The opening of the air space into the furnace may be so shaped as to deflect the
current in any desired direction.
D
.
1000
W. H. MUNNS,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improved Methods for Supplying Air to Furnaces, and the Apparatus
therefor.
I, WALLACE MCGUFFIN GREAVES, of 64 Fountain Street, Manchester, 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:—
It is customary to place a hood inside furnace doors in order to protect the
boiler. I utilise this hood to heat air coming into the furnace.
I construct the hood with a double skin or frame leaving an air space between
the skins. This air space is open at the end towards the furnace in the space
between the lines M, M. An opening is made in the dead plate on each side of the
hood so that air can pass from the ashpit into the aforesaid hood chamber, and so
into the furnace. A mid feather is placed in the upper part of this air chamber so
that the two currents of air do not meet and form eddies. The opening of the air
chamber towards the furnace may be shaped so as to deflect the current in any
desired direction.
To show clearly how my invention is carried out I furnish drawings.
Fig. 1 is a sectional elevation of the hood and air passages.
Fig. 2 is plan of furnace door and dead plate.
A is outer skin and B the inner skin of hood enclosing air chamber J which
chamber is closed towards the furnace door but open towards the furnace. E is
the dead plate. G. G. are openings made through the dead plate E, so that air can
pass from the ash pit to the air chamber J. It is found desirable to admit the air
through gratings D in pipes K which are secured to hood at F. F. C is the mid
feather in air chamber to prevent eddies being formed by the currents entering
through G. G. H is furnace frame.
Having now particularly described and ascertained the nature of my said inven-
tion and in what way the same is to be performed I declare that what I
claim is:
In furnaces a chambered hood closed towards the furnace door and open towards

page_text: the furnace communicating with the ash-pit through openings in the dead plate
and furnished with a mid feather substantially as described for the purpose
specified.
W. H. MUNNS,
Agent for Applicant.