IMPROVEMENTS
Year: 1874

page_text: LETTERS PATENT to James Webster, of Birmingham, in the County
of Warwick, Engineer, for the Invention of "IMPROVEMENTS
Am">
IN
Sealed the 2nd April 1874, and dated the 5th February 1874.

page_text: The apparatus consisting by
parts and adjustable to each other.
The first part is a pipe through which passes the coal gas taken from
a gasometer or main, the end section of this pipe must be of a diameter
calculated in proportion to the size of the apertures for admitting atmo-
spheric air, and which are herein-after described.
The second part of the apparatus is a conical chamber encircling the
extremity of the coal gas pipe, this conical chamber is pierced in its cir-
cumference with holes intended to admit a current of atmospheric
air.
The third part of the apparatus is also a conical chamber but of larger
size than the first, and of a diameter at its base sufficient to cover the
upper portions of the two parts already described, leaving an annular
space between the two conical chambers communicating with this space.
At the lower end of the larger conical chamber are holes pierced for the
admission of another current of atmospheric air which is regulated by an
annular disc or collar revolving round the neck of the first conical
chamber pierced to correspond with the holes of the second conical
chamber, and adjusted to the bottom thereof so as to close over and shut
the holes partially or entirely as required. The nozzle, tuyere, or union
so constructed is secured to a gas pipe, at one end having a valve or tap,
and at the other end to a second pipe for conveying the mixture of gases
into the retort.
To operate the improved nozzle, tuyere, or union, the gas is turned on
passing up the pipe, at the same time atmospheric air will be drawn
through the first conical chamber enveloping and mixing with the
ascending coal gas, and by means of the second conical chamber a
further supply of atmospheric air regulated by the adjustable collar
meets the mixed gas, and the mixture then passes through the exit pipe
into the retort.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Webster in the Great Seal Patent Office on
the 8th July 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
WEBSTER, of Birmingham, in the County of Warwick, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of February, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said James Webster, Her special
licence that I, the said James Webster, my executors, administrators,
and assigns, or such others as I, the said James Webster, my executors,
administrators, and assigns, should at any time agree with and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN APPARATUS
TO BE EMPLOYED IN THE MANUFACTUre of Steel," upon the condition (amongst
others) that I, the said James Webster, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said James Webster, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the

page_text: The improvements will be better understood by referring to the
Drawings hereunto annexed, and to the letters and figures marked
thereon.
Fig. 1. is an elevation of my improved apparatus; Fig. 2 is a longi-
tudinal section of the parts on the line 1, 2, Fig. 1; and Fig. 3 is a
transverse section on the line 3, 4, of Fig. 1.
The apparatus consists of a nozzle, tuyere, or union formed in separate
parts and adjustable to each other.
The first part is a pipe (a) through which passes the coal gas taken
from a gasometer or main; the end section of this pipe must be of a 1
diameter calculated in proportion to the size of the apertures for
admitting atmospheric air, and which are herein-after described.
The second part of the apparatus is a conical chamber (b) encircling
the extremity of the coal gas pipe (a); this conical chamber is pierced in
its circumference with holes (c) intended to admit a current of atmo. 1
spheric air.
The third part of the apparatus is also a conical chamber (d) but of
larger size than the first, and of a diameter at its base sufficient to cover
the upper portion of the conical chamber (6) already described, having
an annular space (e) between the two conical chambers (6) and (d) 2
communicating with this space. At the lower end of the larger conical
chamber are holes (f) pierced for the admission of another current of
atmospheric air which is regulated by an annular disc (9) or collar
revolving round the neck of the first conical chamber (6) pierced as
at (f¹) to correspond with the holes of the second conical chamber (d), 2
and adjusted to the bottom thereof so as to close over and shut the holes
partially or entirely as required. The nozzle, tuyere, or union so con-
structed is secured to a gas pipe, at one end having a valve or tap, and
at the other end to a second pipe (h) for conveying the mixture of gases
into the retort.
-
30
To operate the improved nozzle, tuyere, or union, the gas is turned on
passing up the pipe (a), at the same atmospheric air will be drawn
through the holes (c) and into the first conical chamber (b) enveloping
and mixing with the ascending coal gas, and by means of the apertures (ƒ)
of the second conical chamber (d); a further supply of atmospheric air 35

page_text: regulated by the adjustable collar or disc (9) meets the mixed gas, and
the mixture then passes through the exit pipe (h) into the retort.
Having thus described the object and nature of my said Invention,
and in what manner the same is to be carried into effect, I claim without
limiting myself to these precise details the several improvements in
apparatus to be employed in the manufacture of steel, substantially in
manner as herein more fully set forth and specified.
In witness whereof, I, the said James Webster, have hereunto
set my hand and seal, this Fourth day of July, in the year of our
Lord One thousand eight hundred and seventy-four.