An Improved Furnace Door.
Year: 1888

page_text: Date of Application, 23rd N v., 1888
Complete Specification Left, 3rd Aug., 1889-Accepted, 7th Sept., 1889
PROVISIONAL SPECIFICATION.
An Improved Furnace Door.
I, JOHN WATERS of 61 Cadder Street Pollokshields, Glasgow, Renfrewshire, Forge
Manager do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved construction of Furnace door. Furnace
doors as presently made consist generally of a hollow metallic frame filled in with
fire bricks bound or cemented together. With this construction as will be readily
understood individual bricks or portions of bricks are liable to become loosened
from constant use of the door or to become burned or fractured with the intense
heat of the furnace the result being in either case that the bricks eventually fall
out and the door is then in many instances cast aside as useless and replaced by a
new one.
Under my
invention the possibility of individual bricks falling out is entirely
obviated as instead of using a number of bricks as heretofore to fill up the cast iron
or other frame I use a single homogeneous brick which is so moulded when plastic
as to fit into and fill up the frame. For the purpose of holding the brick in
position I fit or embed into the brick when soft one two or other number of studs
or staples which may be made of metal, fireclay, or other suitable material or
substance. These studs or staples are preferably made with a broad flange or its
equivalent at their base for the purpose of holding tightly and firmly in the brick
and the flange may if desired be perforated or made with a number of holes in it,
or instead of having a flange the studs or staples may be made tapered or be dove-
tailed into into position for this purpose. The studs or staples when the brick is
fitted into position project through holes made in the frame, the brick being held
securely in position by passing cottar or other pins through slots or holes made in
the projecting ends of the studs or staples. In some cases the studs or staples
instead of being embedded in the brick may pass right through the brick and the
frame; or the brick may be bolted to the frame. Sometimes it would be found
advantageous to make the hollow frame with but three sides and to form a flange
round their edges, the brick being slid down the groove so formed into position.
Dated this 22nd day of November 1888
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Agent.
COMPLETE SPECIFICATION.
An Improved Furnace Door.
1, JOHN WATERS, lately of 61 Cadder Street, now of 4 Berlin Terrace, Pollok-
shields, Glasgow, Renfrewshire, Forge Manager 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 an improved construction of furnace door.
Furnace doors as presently constructed consist generally of a hollow metallic frame
filled in with fire bricks bound or cemented together. With this construction as will
be readily understoood, individual bricks or portions of bricks, are liable to become
loosened from constant use of the door, or to become burned or fractured with the
intense heat of the furnace, the result being, in either case, that the bricks eventually
fall out and the door is then, in many instances, cast aside as useless and replaced by
a new one.

page_text: Under my invention, the possibility of individual bricks falling out is entirely
obviated, as, instead of using a number of bricks, as heretofore, to fill up the cast iron
or other frame, I use a single homogeneous brick, which is so moulded when plastic,
as to fit into, and fill up the frame. For the purpose of holding the brick in
position, I fit or embed into the brick, one, two or other number of studs or staples;
which may be made of metal, fireclay or other suitable material or substance. The
studs or staples are preferably made with a broad flange, or its equivalent, at their
base, for the purpose of holding tightly and firmly in the brick, and the flange may,
if desired, be perforated or made with a number of holes in it; or, instead of having
a flange, the studs or staples may be made tapered or be dovetailed into position
for this purpose. The studs or staples, when the brick is fitted into position, project
through holes made in the frame, the brick being held securely in position by passing
cottar or other pins through slots or holes made in the projecting ends of the studs
or staples. In some cases the studs or staples instead of being embedded in the
brick may pass right through the brick and the frame; or the brick may be bolted
to the frame. Sometimes it would be found advantageous to make the hollow
frame with but three sides and to form a flange round their edges, the brick being
slid down the groove so formed into position.
If desired instead of using one large brick to fill up the frame 2 or more bricks
may be employed, these bricks being in each case secured in position by studs or
staples as in the case of a single brick.
And in order that my said invention may be properly understood I have hereunto
appended an explanatory sheet of drawings whereon.
Fig. 1, is a front view of a furnace door fitted to hold four large bricks two of them
being shown in position.
Fig. 2 is a plan of the door.
Fig. 3 is a plan and Fig. 4 an end elevation of one of the bricks.
Fig. 5 is a plan and fig. 6 a side elevation of a stud for holding the brick in
position.
The door as shown in these figures consists of a hollow metallic frame a into which is
fitted four bricks two of them b, c being shown in position at fig. 1. Instead of using
four bricks as shown, one or other number of bricks may be used. These bricks when
plastic are moulded in one solid or homogeneous piece and they have a groove formed
in them as shown at d, figs. 3 and 4. To enable the brick to be held securely in
position in the frame, a stud e having a broad flange or base e¹ on it, is embedded in
the brick or fitted into the groove d. The flange e¹ catches firmly in the groove
whilst the part e projects out through the hole f made in the frame a (see figs. 1
and 2). As shown at 6ig. 6 the part e of the stud has a slot in it through which a
cottar or other pin is passed, as shown at fig. 2, when it is desired to hold the brick in;
place. If desired the flange el of the stud or equivalent may have a number of holes g
(see fig. 5) in it, through which, if the stud or equivalent is fitted or embedded in the
brick, when plastic, the plastic clay presses into the holes and so aids in holding the
stud firmly in place.
When two or other number of bricks are secured in place in the manner herein-
before described should one of them be burned it can easily by replaced by a new
brick without interfering with the other bricks or injuring the door in any way.
Instead of using the form of stud shown, staples or their equivalent may be used
or if desired the brick or bricks may be bolted in position.
With a furnace door made as hereinbefore described although the bricks may,
by constant use, become burned or broken the frame and the studs or equivalent
are still perfectly good and capable of being used with new bricks.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a furnace door the combination with a hollow frame of a single homogeneous

page_text: brick secured to said frame by means of studs, staples or their equivalent, substantially
as and for the purposes set forth.
2. In a furnace door the securing the bricks to the frame by means of studs, staples
or their equivalent, substantially in the manner and for the purposes set forth.
Dated this Twenty-sixth day of July 1889.
H. D. FITZPATRICK,
70, Wellington Street, Glasgow, Applicant's Agent.