Improvements in or connected with Apparatus for Making Steel.
Year: 1890

page_text: Date of Application, 18th Aug., 1890
Complete Specification Left, 19th May, 1891-Accepted, 20th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in or connected with Apparatus for Making Steel.
I, GEORGE RODGER, of 3, Christchurch Road, Sheffield, in the County of
York, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference mainly to the manufacture of steel by the method
usually termed the "open hearth process."
According to this invention an open hearth furnace of the "Siemens
or other
type divided, that is, the hearth is divided into two or more baths by partitions
built across it, so that two or more separate baths of molten metal are produced
in the same furnace.
Each bath will be provided with a tapping hole and a spout or runner, and other
accessories.
In operation according to this invention the separate baths are separately treated
(by any of the ordinary methods or special. treatment) so as to produce different
classes or tempers of steel. Thus I produce in a single furnace a different grade or
temper of steel in each bath, and accordingly as different tempers, classes, or
grades of steel are required, for the various molds to be filled from the furnace,
so by tapping the one or other of the baths of the furnace the required temper or
class of steel can be drawn from it.
One amongst other advantages derived by the use of my invention is that it
renders possible to carry on the daily work of a foundry with less loss of time
and waste of material, and a greater certainty of the castings being of the temper
most suited to their destined uses, than in the case when one temper or class of
metal is produced at each melting.
It will be understood this invention can be applied to various types of furnaces,
and in different ways according to the various conditions of its applications, and
constructions of furnaces.
Dated 16th day of August 1890.
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicant's Patent Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with Apparatus for Making Steel.
1, GEORGE RODGER, of 3, Christchurch Road, Sheffield in the County of
York, 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 :-
This invention has reference mainly to the manufacture of steel by the method
usually termed the "
open hearth process."
According to this invention an open hearth furnace of the Siemens or other
type is divided, that is, the hearth is divided into two or more baths by partitions
built across it, so that two or more separate baths of molten metal are produced
in the same furnace.
Each bath will be provided with a tapping hole and a spout or runner, and
other accessories.
In operation, according to this invention, the separate baths are separately
treated (by any of the ordinary methods or special treatment) so as to produce
different classes or tempers of steel. Thus produce in a single furnace a different
[P11

page_text: grade or temper of steel in each bath, and accordingly as different tempers, classes,
or grades of steel are required, for the various molds to be filled from the furnace,
so by tapping the one or other of the baths of the furnace the required temper or
class of steel can be drawn from it.
Que amongst other advantages derived by the use of my invention is that it
renders it possible to carry on the daily work of a foundry with less loss of time
and waste of material, and a greater certainty of the castings being of the temper
most suited to their destined uses, than in the case when one temper or class of
metal is produced at each melting.
In the drawings which serve to illustrate this invention, 1 shew a Siemens type
of furnace provided with improvements according to my invention. The drawing
shews the furnace in side elevation, the bottom of it being shaded by dotted
lines.
Referring to the drawing, a is the roof of the furnace, whilst represents the
bottom of it. 1 and 2 represent the two baths, separated by the division c.
dd represent two tap holes, one for each of the baths.
It is to be understood that the furnace shewn merely represents one type or
example of furnace and particular arrangement according to the invention, and that
it is no way confined to that type, but is susceptible of being applied to various
types of furnaces, and in different ways according to the various conditions of its
applications, and different constructions of furnaces.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, declare that what
claim is :-
A furnace of the kind herein referred to, having two or more baths or beds for
purposes such as specified, and adapted to operate substantially as herein set forth.
Dated this 16th day of May 1891.
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicant's Patent Agents.