IMPROVEMENTS IN ANNEALING OVENS AND FURNACES
Year: 1871

page_text: LETTERS PATENT to Edgar Williman Jobson, of Derby, in the County
of Derby, Civil Engineer, for the Invention of “IMPROVEMENTS IN
ANNEALING OVENS AND FURNACES."
Sealed the 6th June 1871, and dated the 22nd February 1871.
PROVISIONAL SPECIFICATION left by the said Edgar Williman
Jobson at the Office of the Commissioners of Patents, with his.
Petition, on the 22nd February 1871.
I, EDGAR WILLIMAN JOBSON, of Derby, in the County of Derby,
Civil Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN ANNEALING OVENS AND FURNACES," to be as follows, that
is to say:-
My Invention consists in constructing annealing ovens and furnaces
in the following manner:-I form a truck or carriage mounted upon
wheels of such form as to be capable of running in a grooved tram
between guide walls in and out of the furnace; between the wheels of
this truck and forming part of the same is placed a fire-brick flue
travelling with the truck, this flue is cased with iron, and above it and
extending to the outer edge of the guide walls is a table of fire-brick or

page_text: fire-clay upon which the annealing pans or articles to be annealed, dried,
burnt, or heated are placed in such order that between each article,
stack, or pan space is left for the flame to surround each one.
The top
of the flue may be formed with openings at intervals in its length, and
cach of these openings is capable of being partially or cutirely closed by
a fire-brick so arranged that the escape of flame by the flue may be
regulated equally from these openings. The fire-bars are placed between
the guide walls and the outer or retaining walls of the furnace, and a top
flue constructed like the bottom flue with its openings and damper
arrangement is placed on the crown of the furnace. The fires are fed
from hoppers fixed on the outside of the side walls of the furnace, tunnels
being formed in such side walls to allow the coal to be delivered on to
the bars, these tunnels are fitted with sliding doors to close them at will,
and above each is an air tunnel conveying air into the furnace imme-
diately over the fire. By this arrangement the fuel and consequently
the heat may at will either be confined to one part or to several parts of
the furnace or equally distributed over the whole; doors in the front
of the furnace provide for the supervision of the fire and similar doors
at the sides or in front for clearing out cinders. The furnace doors are
formed of a strong iron box casing of sufficient thickness to receive
fire-bricks laid headerwise upon an inclination upwards to the inside of
the door, at intervals is laid a bond plato of stout iron. This arrange-
ment is to avoid the evil of irregular settling of the bricks by shrinkago
and to enable me to make up any deficiency thus caused by the intro-
duction of more bricks at the top, the meeting edges of these doors and
their frames are provided with a groove and overlapping rebato piece so
that the groove may be luted, or if preferred in place of the luting a
bead upon the one edge may be received into the groove on the other
and thus form a close joint.
By this arrangement of oven or furnace the truck with its travelling :
fluo may readily be run in and out of the furnace, when in and the
wheels scotched, one end abutting against the back wall of the furnace,
the continuity of the flue is ensured, and several of such trucks, cach
carrying its own fluc, may be enclosed at one time in a furnace of
sufficient capacity, care being taken to ensure the due abutting of each
truck and flue upon its neighbour.
More flues than one may be introduced into each truck, and this
flue or flues, may if preferred, be fixed upon the furnace floor, the,

page_text: truck travelling above them, and so arranged that the draught shall
pass into the fluc through the surface of the truck in manner already
described.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edgar Williman Jobson in the Great Scal Patent
Office on the 21st August 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDGAR
WILLIMAN JOBSON, of Derby, in the County of Derby, Civil Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of February, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did for Herself, Her heirs and successors,
give and grant unto me, the said Edgar Williman Jobson, Her special
license that I, the said Edgar Williman Jobson, my executors, admi-
nistrators, and assigns, or such others as I, the said Edgar Williman
Jobson, 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,
usc, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN ANNEALING OVENS AND FURNACES," upon the condition
(amongst others) that I, the said Edgar Williman Jobson, 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 Edgar Williman Jobson, 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 following statement thereof, that is to say :—
An important object to be attained in the use of annealing ovens and
furnaces is, that there be no obstacle to the continuity of their working,

page_text: so that the heat absorbed by the walls of the furnace during thic heating
of one charge may be retained and used for the heating of the next, thus
saving time and fuel now lost during the process of cooling before the
charge can be withdrawn and the oven or furnace recharged.
My improvements permit the packing and unpacking of the annealing t
pans, or the stacking and removal of the articles under operation to be
effected outside the oven; the result of which is a considerable saving
of time and labour.
Another object of my improvements is to maintain a continuity in the
supply of fuel, and thus to dispense with the constant attendance of the 1
stoker.
Again my improvements are designed to burn tho smoke in the form
of gas, thus obtaining further economy of fuel and the avoidance of all
annoyance from smoke.
Another object of importance in the working of annealing ovens and
furnaces is to have the power of directing the heat to the different parts
at will, and by providing a means to control the draft at each separate
entrance to the flues, as herein-after described, the current of heat may
be directed and its action controlled.
And in order that the Invention may be fully understood I will, by
the aid of the accompanying Drawings, proceed to describe the means
pursued by me in carrying the same into effect. Referring to Sheet 1
Figure 1 is a front elevation, and Figure 2 is a transverse section of
an annealing oven or furnace constructed in accordance with my
mprovements. Figures 3 and 4, Sheet. 2, represent the same in side
elevation and longitudinal section, and Figures 5 and 6, Sheet 3, are
sectional plans.
(a) is a truck or carriage mounted upon wheels (a¹) formed for
running on a tramway (b) between the walls (c) in and out of the
furnace. Between the wheels of the truck or carriage (a) and forming
part of the same is placed a fire-brick fluc (d), this flue is cased with
iron, and above it and extending nearly to the outer edge of the walls (c)
is a table of fire-brick or fire-clay (e) upon which are placed the annealing
pans or articles to be annealed, dried, burnt, or heated in such order
that between each article, stack, or pan space is left for the flame to
surround cach one. The top of the flue (d) may be formed with
openings () in its length, and each one of these openings is capable of

page_text: be
being partially or wholly closed by a damper of fire-brick or other
material so arranged that the escape of flame into the flue (d) may
regulated at these openings; (g) are the fire-bars placed in spaces beyond
the walls (c) and through the outer or retaining walls (h) of the furnace;
(i) is a top flue constructed like the bottom flue with openings and
damper arrangements similar to those in the flue (a), and situated as
shewn on the top or crown of the furnace. The fires are fed from
hoppers () fixed upon the outside of the retaining walls (h) of the
furnace, tunnels (1) being formed in such side walls (h) to allow the coal
to be delivered on to the bars (g), the mouth pieces connected with the
tunnels (1) are fitted with doors (m) to close the mouth pieces at will and
thus forming an air passage for conveying air into the furnace immediately
over the fire. By this arrangement of the doors (m.) in connection
with the dampers (in the flucs (a and i) the heat may at will either be
regulated to one part or to several parts of the furnace or equally distri-
buted over the whole, doors (n) in the front of the furnace provide for
the supervision of the fire, and similar doors (12¹) at the sides or in front
are arranged for clearing out ashes of the fuel; (0) are the furnace doors
formed of a strong iron box casing (0') of sufficient thickness to receive
fire-bricks laid by preference headerwise upon an inclination upward to
the inside of the doors, and at intervals is laid a bond plate of stout iron.
This arrangement is to avoid the evil of irregular settling of the bricks
by skrinkage, and to enable me to make up any deficiency thus caused
by the introduction of more bricks at the top; the meeting edges of
these doors and their frames are provided with a groove and overlapping
rebate piece (2), Figure 6, so that the groove may be luted, or, if preferred,
in place of the luting, a bead upon the one edge may be received into
the groove upon the other and thus form a close joint; (o") are openings
provided with stoppers for the purpose of inspecting the furnace when
at work; (o) is a similar opening for the purpose of inspecting the
lower flue (d) when the stopper (-) has been removed; (3) is a similar
opening for inspecting the top flue (I); (x) and (2) are division plates
in the air flue (W) to separate the current, and thus ensure the delivery
of the air at various points in the length of the fluc, thus producing an
equable distribution of the same.

page_text: the furnace, the continuity of the flue is ensured, and several of such
trucks, cach carrying its own fluc, may be enclosed at one time in a
furnace of sufficient capacity, care being taken to ensure the due
abutting of cach truck and flue upon its neighbour.
More flues than one may be introduced into each truck, and this fluc
or flues, may if preferred, be fixed upon the furnace floor, the truck
travelling above them, and so arranged that the draught shall pass into
the flue through the surface of the truck in manner already described.
Having thus described the object and nature of my said Invention,
and the manner in which the same is to be carried into effect, I claim
without limiting myself to these precise details,-
Firstly. The construction of the truck arranged to contain within it
a smoke flue with openings or dampers, or a truck with openings in
its upper surface, so arranged as to form passages to a fluo on or under
the floor of the furnace, whereby the gascous products of combustion :
may be conveyed through the truck to the flue and thence to the
chimney.
•
Secondly. I claim the hoppers for the purpose herein described to
deliver the fuel on to the surface of the firc-bars.
Thirdly. I claim forming an air flue or flues in or on the floor of the s
furnace and communicating therewith in manner described.
Fourthly. I claim the construction of the furnace doors lined with
fire-brick or other suitable material as described; and generally I claim
the several improvements in annealing ovens and furnaces, substantially
in manner herein more fully set forth and specified.
In witness whereof, I, the said Edgar Williman Jobson have liere-
unto set my hand and scal, this Sixteenth day of August, in
the year of our Lord One thousand eight hundred and seventy-
ono.
2
EDGAR WILLIMAN JOBSON. (L.S.)