Improvements in Furnace Doors.
Year: 1897

page_text: Improvements in Furnace Doors.
I, JOSEPHI HUGHES, of No. 1, Northcote Street, Walsall, in the County of
Stafford, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the improvements hereinafter described in furnace
doors, such for example as are used for forge, mills, heating furnaces, and the
like.
My invention has for its object to provide means whereby such doors may be
made of certain materials hereinafter described so as to prevent loss of heat and
reduce wear and tear to a minimum.
My invention consists essentially in making furnace doors composed of the
following ingredients, and preferably in the proportions herein stated though
I do not confine myself exactly to these proportions, that is to say:-
3 ground fire clay, commonly known as yard coal fire clay.
5
1/10 cokė dust,
1/10'
asbestos,
1/10 plumbago.
10 horse manure.
These, when combined, are afterwards dried by exposure to the atmosphere,
and moulded into the required shape.
I attach to the said door an iron strap or cramp for the purpose of moving the
same to and from the furnace in one direction or the other. The said strap
is arranged to fit partly over the door, the ends being bent engage in dovetail
shaped slots formed in the door, the strap being held in position and adjusted
by a set pin, which screws into the opposite end of the strap, and butts against
a portion of the door, the nature of the door protecting the same from the heat
of the furnace. A series of holes are formed partly through the door to prevent
it breaking when submitted to great heat and to facilitate drying.
Dated this 23rd day of October 1897.

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:--
This invention relates to the improvements hereinafter described in furnace
doors, such for example as are used for forge, mills, heating furnaces, and the
like.
My invention has for its object to provide means whereby such doors may be
made of certain materials hereinafter described so as to prevent loss of heat, and
reduce wear and tear and breakages to a minimum.
The nature of my invention will be more clearly understood from the accom-
panying drawings the same letters of reference indicating similar parts throughout.
Figure 1 represents a front elevation,
Figure 2 a side elevation, and Figure 3 a longitudinal section, of a furnace door,
constructed in accordance with my invention.
Figure 4 is a cross section of door ony showing convexity of same.
A represents the door made of the following ingredients, and preferably in
the proportions herein stated, that is to say:-
ground fire clay, commonly known as yard coal fire clay.
1/10 coke dust.
1/10 asbestos.
1/10 plumbago,
10 horse manure.
These, when combined, are afterwards dried by exposure to the atmosphere,
and moulded into the required shape.
B is an iron or steel strap the object of which is to move the door up or down.
The taper part of the strap C engages in the taper part of the door D, the strap
is held in position and adjusted by means of the set screw E which screws through
the end and butts against a part of the door G. H, H, are dovetail shaped
slots formed in the door to admit the strap B. The holes I are formed partly
through the door to prevent it breaking when submitted to great heat, and are
to facilitate drying.
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
1. The improvements in furnace doors, composed of ground fire clay, horse
manure, ground plumbago, and ground asbestos clay, substantially as described
and for the purpose set forth.
2. The combination of a furnace door as claimed above and an iron or steel
strap B substantially as described and illustrated in the drawings and for the
purpose set forth.
D
09 1
C T1 1000
WILLIAM HENRY BARACLOUGH,
36, Temple Street, Birmingham, Agent for the Applicant.