AN IMPROVED METHOD OF HEATING Box IRONS BY A MIXTURE OF GAS AND AIR
Year: 1877

page_text: LETTERS PATENT to Frederick Stitchbury, of Leyton, in the County of Essex,
Engineer, for the Invention of "AN IMPROVED METHOD OF HEATING Box
IRONS BY A MIXTURE OF GAS AND AIR."
PROVISIONAL SPECIFICATION left by the said Frederick Stitchbury at the
Office of the Commissioners of Patents on the 1st January 1877.
FREDERICK STITCHBURY, of Leyton, in the County of Essex, Engineer.
IMPROVED METHOD OF HEATING BOX IRONS BY A MIXTURE OF GAS AND AIR."
«AN
My Invention consists of an improved method of heating box or other hollow
irons by means of a mixture of gas and air supplied by any mechanical or other
device capable of giving the required pressure.
In an ordinary box iron the heater is a piece of iron which is made hot in a fire
and is placed in the interior of the iron, which it resembles in shape.
In order to carry out my improved method of heating box irons I make the
heater hollow and place it near the top of the interior of the iron, fixing it there by
set or other screws. The bottom of the hollow case forming the heater is perforated
with a number of holes at which the mixture of gas and air is consumed, and at the
back is an opening into which the pipe conveying the mixture of gas and air is
secured. A few holes are drilled in the sides of the iron for the purpose of supplying
the means of exit for the products of combustion.
'
To prevent the gas and air from igniting, except at the burners or under side of
the hollow heater, I fill the latter loosely with fine wire.
The hollow heater can be made of any size or shape and is capable of being fitted
to any box iron at present in use.
With a suitable admixture of gas and air supplied at the proper pressure almost
any required degree of heat may be obtained with this improved heater without
the risk and danger of explosion and without the production of any disagreeable or
deleterious vapours.

page_text: ←
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frederick Stitchbury in the Great Seal Patent Office on the 11th
June 1877.
FREDERICK STITCHBURY, of Leyton, in the County of Essex, Engineer. "AN
IMPROVED METHOD OF HEATING BOX IRONS BY A MIXTURE OF GAS AND AIR."
My said Invention consists of an improved method of heating box or other hollow.
irons by means of a mixture of gas and air supplied by any mechanical or other
device capable of giving the required pressure.
In an ordinary box iron the heater is a piece of iron which is made hot in a fire
and is placed in the interior of the iron, which it resembles in shape.
In order to carry out my improved method of heating such ordinary box irons I
make the heater hollow and place it near the top of the interior of the iron, fixing
it there by set or other screws. The bottom of the hollow case forming the heater
is perforated with a number of holes at which the mixture of gas and air is
consumed, and at the back is an opening into which the pipe conveying the
mixture of gas and air is screwed. A few holes are drilled in the sides of the iron
for the purpose of supplying the means of exit for the products of combustion.
To prevent the mixture from igniting, except at the burners or under side of the
heater, I fill the hollow space inside loosely with fine wire.
The hollow heater can be made of any size or shape and is capable of being fitted..
to any ordinary box iron at present in use.
With a suitable admixture of gas and air supplied at the proper pressure almost
any required degree of heat may be obtained with this improved heater without
the risk and danger of explosion and without the production of any disagreeable or
deleterious vapours.
And in order that my said Invention and the manner of performing the same
may be properly understood, I hereunto append a Sheet of explanatory Drawings
to be herein-after referred to and representing my improved heater. In these.
Drawings the same reference numerals are used to mark the same parts wherever
they are repeated.
Figure 1 of the Drawings is a longitudinal section of an ordinary box iron
showing my improved heater, also in section, fitted in position in it. In the hollow
case 1, Fig. 1, as many cones are cast in as burner. holes 3 are required, the hollow
spaces between being filled with fine wire. The cover 4 is fixed a short distance
above the inlet to the burner holes 3. In the back of the heater a hole is bored
into which the supply pipe 5 is screwed. In placing the heater in position it is
pushed in so as to lie flush with the inside line of the groove 6, as shown by dotted
lines on Fig. 3, which is a plan of an ordinary box iron fitted with my improved
heater, the projection 7 reaching nearly to the back edge of the iron; over this
projection 7 a plate, Fig. 5, is laid in the groove 6 which shuts the heater in. An
external plate 8, shown in section in Fig. 1 and in elevation Fig. 2, is then placed
against the projection 7, and covering the groove 6 and plate Fig. 5; the supply
tube 5 passing loosely through it is screwed into the heater, by which the latter is
drawn tightly up against the plate Fig. 5, and is fixed there by the lock nut 9.
Through the plate outlets 10 are provided for the escape of the products of
combustion. Fig. 4 is a plan of the heater with cover screwed on.
Having thus particularly described my said Invention, and the manner of
performing the same, I have to state that what I believe to be novel and original,
and claim as the Invention secured to me by the herein-before in part recited.
Letters Patent is,―
1. The application of a heater or burner to any ordinary box or other hollow
iron, so that such iron may be heated by a mixture of gas and air.

page_text: 2. The method of fixing my improved heater or burner, substantially such as is
herein described and delineated.
In witness whereof, I the said Frederick Stitchbury, have hereunto set my
hand and seal, this Twenty-fifth day of May, in the year of our Lord
One thousand eight hundred and seventy-seven.
FREDERICK STITCHBURY. (L.S.)