Improvements in Furnace Fire-doors.
Year: 1892

page_text: Date of Application, 3rd Nov., 1892
Complete Specification Left, 14th Feb., 1893-Accepted, 8th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Furnace Fire-doors.
We, EDWIN COLE of No. 1, Bridport Road Thornton Heath, in the County
of Surrey, Engine Driver, and BENJAMIN AUSTIN of No. 117 Bensham Grove,
Thornton Heath, in the County of Surrey, Millwright and Engineer do hereby
declare the nature of this invention to be as follows:-
It consists of cast iron chambers, back and front, with slotted holes, top, bottom
and sides inside and outside; with perforated front and back, and when closed, the
flange of same remains three quarters of an inch from front of boiler, and requires
no adjusting of any kind whatever, merely closing the door in the ordinary way
and the action takes place immediately; thereby excluding all cold air from crown
of boiler and doing away with ali unequal expansion and contraction of boiler
plates, and does not in any way interfere with the draught.
Dated this Second day of November 1892.
EDWIN COLE.
BENJAMIN AUSTIN.
COMPLETE SPECIFICATION.
Improvements in Furnace Fire-doors.
We EDWIN COLE of 1 Bridport Road, Thornton Heath, in the County of
Surrey Engine Driver and BENJAMIN AUSTIN of 117 Bensham Grove, Thornton
Heath in the County of Surrey, Millwright and 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 consists of two cast iron chambers, front, and back of doors, with slotted holes
top, bottom, and sides, inside and outside, perforated with holes front and back,
and when these doors are closed an air space remains between the flange of doors
and front of boilers. These doors have no moveable slides to be adjusted they
being themselves adjusted, and by merely closing the doors in the ordinary way
combustion is immediately produced, and the full heating benefit derived from the
coal gases in consequence of the attraction of smoke towards back chamber of doors,
caused primarily by the air space between flange of doors and front of boilers, and
assisted by the front chamber with small perforated holes, and slots, top, bottom,
and sides, as before mentioned; thereby excluding all direct draught from striking
on fire box plates, the air becoming heated before reaching them, and consequently
no unequal expansion or contraction takes place, and this action does not check the
draught of boilers.
We will now describe our invention with reference to accompanying drawings in
which a is front chamber, a a back chamber, slotted holes in both chambers, as
shewn in Figures 1 and 3. cis perforation in front chamber in Figure 2, and in
back chamber in Figure 4. d is space between flange of door e and face of boiler f,
shewn in Figures I, and 3.
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 :-
-
1. This particular improvement in furnace fire doors, whereby, when closed the
space d remains all round between flange of door e and face of boiler f; this fore-
going arrangement being the primary cause of attraction of smoke over fire.
Price 8d7

page_text: 2. These further improvements, consisting of two cast iron chambers, of different
sizes, with perforated, and slotted holes assisting in attraction of smoke over fire as
herein before described and as illustrated by accompanying drawings.
Dated this Fourteenth day of February One thousand eight hundred and
ninety-three
EDWIN COLE.
BENJAMIN AUSTIN.