A New Method of Heating Plates of Steel, Iron, or any other Metal.
Year: 1889

page_text: Date of Application, 17th Jan., 1889
Complete Specification Left, 17th Oct., 1889-Accepted, 23rd Nov.,
1889
PROVISIONAL SPECIFICATION.
A New Method of Heating Plates of Steel, Iron, or any other
Metal.
1, JOHN HART, of Post Office Buildings, Middlesbrough, in the County of York,
Engineer and Agent, do hereby declare the nature of this invention to be as
follows:
The particular object of this invention is the production of hollow jaws, upon all
kinds of railway sleepers, made of Steel, Iron, or any other metal, capable of
distension, by means of heat and pressure, but it may be used for producing pro-
jections upon Plates for any other purpose.
By my method, 1 propose to heat the plate, only at the part or parts to be operated
on. I further propose to heat every part of the area operated on, in proportion to
the sectional area of that part, that is, the heat will be more or less intense,.
according to the greater or lesser sectional area of the part to be distended. By
this method a balance of resistance is obtained, whereby all and every part is acted
on at one and the same time, and the result is, that all and every part of the area
to be acted on, is distended equally, with the result, that a cone or other projection
is produced, which will be found of equal, or practically equal thickness throughout.
To do this, use a hollow box, which I call a multiple Blowpipe Box, or Burner,
having on one side a number of Jets or burners communicating with the interior.
On the opposite or any other side is one or more inlet pipes for Gas, Oil, Vapour
or any kind of fluid or Gaseous Combustible, to be used in conjunction with, Oxygen,
Atmospheric Air, or any other Gas capable of assisting to produce the required heat.
The Oxygen, Atmospheric Air; or other Gas may be mixed with the Gas, Oil or
Vapour before entering the Multiple Blowpipe Box or Burner, or in the Box, or
outside of the Box, at the point of combustion.
A multiple blowpipe box or burner can be placed on one side of the plate to be
heated, exactly opposite to one on the other side. This lessens the time required
for heating, makes the plate of equal temperature on both sides and throughout,
at the point heated.
The Burners or Jets are arranged closer to, or farther apart from each other, so as
to give off the proper proportion of heat required at each point of the area to be
operated on.
Each burner or group of burners may be regulated, and also the Air, Oxygen or
other Gas intended to be used in conjunction to assist in producing the required
heat.
Any number of Sleepers may be heated at the same time, by providing the
necessary number of multiple blowpipe boxes or burners. The Sleepers may be
carried upon an automatic table capable of moving the Sleepers forward at intervals
until each is brought close to or pushed into the machine which will produce the
projections. The multiple blowpipe boxes or burners can be fixed in known positions
in relation to the Automatic Table.
Any Machine may be used to produce the projections after the plate or Sleeper
has been heated by my method.
As the plates or Sleepers can be heated to a much higher temperature than in a
furnace, and being delivered close to or into the Machine, much less power is required
in the Machine, and more heat is left, permitting the Sleeper to be completely finished
in one heat.
Should it be found that the centre or weakest part of the plate or Sleeper to be
operated on is liable to become too hot, by conduction, a jet of water or air may be
projected upon the plate or sleeper at that point, or a block of refractory material

page_text: may be introduced between the plate or sleeper and the multiple blowpipe box or
burner to obstruct the Heat where not required, or reduce it to the amount suitable.
To prevent the multiple Blowpipe Boxes or Burners being injured by the heat,
water jackets may be used.
COMPLETE SPECIFICATION.
A New Method of Heating Plates of Steel, Iron, or any other
Metal.
I, JOHN HART, of Post Office Buildings, Middlesbrough, in the County of York,.
Engineer and Agent, 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:-
The particular object of this invention is the production of hollow jaws upon all-
kinds of railway sleepers, made of steel, iron, or any other metal capable of distention,
by means of heat and pressure, but it may be used for producing projections upon
plates for any other purpose.
By my method, I propose to heat the plate only at the part or parts to be operated
on. 1 further propose to heat every part of the area operated on, in proportion to the
sectional area of that part, that is, the heat will be more or less intense, according to
the greater or lesser sectional area of the part to be distended. By this method, a
balance of resistance is obtained, whereby all and every part is acted on at one and
the same time, and the result is that all and every part of the area to be acted on, is
distendod equally, with the restit, that a cone, or other projection is produced, which
will be found of equal, or practically equal thickness, throughout.
To do this, use a hollow-box, which. Lcall a multiple blow pipe box, or burner,
having on one side, a number of jets or burners communicating with the-interior, on
the opposite, or any other side, is one or more inlet pipes, for gas, oil, vapour, or any
kind of fluid or gaseous combustible, to be used in conjunction with, oxygen,
atmospheric air, or any other gas, capable of assisting to produce the required-heat..
The oxygen, atmospheric air, or other gas may be iuixed with the gas, oil, or
vapour before entering the multiple blow pipe box or burner, or in the box or outside
of the box, at the point of combustion.
A multiple blow pipe box or burner can be placed on one side of the plate to boc
heated, exactly opposite to one on the other side, this lessens the time required for
heating, and makes the plate of equal temperature on both sides, and throughout, at
the point heated.
The burners or jets are arranged closer to, or farther apart from each other, so as
to give off the proper proportion of heat required at each point of the area to be
operated on.
Each burner or group of burners may be regulated, and also the air, oxygen, or
other gas, intended to be used in conjunction, to assist in producing the required
heat.
Any number of sleepers may be heated at the same time, by providing the necessary
number of Multiple blow pipe boxes or burners.-The sleepers may be carried upon
an automatic table capable of moving the sleepers forward, at intervals, until each is
brought close to or pushed into the machine which will produce the projections.--
The multiple blowpipe boxes, or burners can be fixed in known positions, in relation
to the automatic table. Any machine may be used to produce the projections, after
the plate or sleeper has been heated by my method. As the plates or sleepers can be
heated to a much higher temperature than in a furnace and being delivered close to,
or into, the machine, much less power is required in the machine, and more heat is
left, permitting the sleeper to be completely finished in one heat.
Should it be found that the centre or weakest part of the plate or sleeper to be
operated on is liable to become too hot, by conduction, a jet of water or air may be
1

page_text: projected upon the plate or sleeper at that point, or a block of refractory material may
be introduced between the plate or sleeper and the multiple blowpipe box or burner
to obstruct the heat where not required, or reduce it to the amount suitable.
To prevent the multiple blowpipe boxes or burners, being injured by the heat,
water jackets may be used.
In addition to the purpose already described, my method may be used for con-
pressing or collapsing platos to any form required, not distending, but thickening, for
sleeper jaws, boiler ends, or any other purpose applicable.
To render my invention more clearly understood, I annex a drawing No. 1. and
final.
Figure 1. is an elevation of my multiple blowpipe box or burner, half in section,
on line A. B.-Figure 2, is a general plan of the top side, Figure 3, is a transverse
section at line C. D. Figures 4, 5, and 6, shew enlarged views of a burner or jet.
The box may be made in three parts as shewn, or in one piece. 1 is the inlet for
gas, oil, vapour, or any kind of gaseous combustible. 2 is the inlet for oxygen,
atmospheric air or other gas to assist in producing the required heat.-3, 3, are
burners or jets, 4, 4, screw bushes, for making the burners or jets air, or gas-tight,
and also, for regulating the gas, oil, vapour, or atmospheric air, or other gaseous
combustible.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare, that what
I claim is.
First. The arrangement of Box and jets or burners and inlets as shewn, and,
Second. The arrangement of burners in such manner, that every part of the area to
be operated upon, may be heated in proportion to that particular area.
Datel tún 16th day of October 1880
JOHN HART.