IMPROVE-" MENTS IN THE CONSTRUCTION OF FURNACES
Year: 1847

page_text: HAZELDINE'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
HAZELDINE, of Brudenell Place, New North Road, in the County of Mid-
dlesex, Engineer, send greeting.
**WHEREAS Her present most Excellent Majesty Queen Victoria, by Hér
5 Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland; bearing date at Westminster, the Eighteenth day of May,
One thousand eight hundred and forty-seven, in the Tenth year of Her reign,
did, for Herself, Her heirs, and successors, give and grant unto me, the said
Thomas Hazeldine, my exors, admors; and assigns, Her especial licence, full
power, sole privilege and authority, that I, the said Thomas Hazeldine,' my
exors, admors, and assigns, or such others as I, the said Thomas Hazeldine,
my exors, admors, or assigns, should at any time agree with, and no others, from
time to time and at all times during the 'term of years therein expressed,
should and lawfully 'might make, use, exercise, and vend, within England,
5 Wales, and the Town of Berwick upon Tweed, my Invention of "IMPROVE-"
MENTS IN THE CONSTRUCTION OF FURNACES;" in which said Letters Patent. is
contained a proviso that I, the said Thomas Hazeldine, shall cause a particular
description of the nature of my said Invention, and in what manner the same'
is to be performed, to be inrolled in Her said Majesty's High Court of Chancery'
within six calendar months next and immediately after the date of the said in'
part recited Letters Patent, as in and by the same, reference being thereunto
had, will more fully and at large appear.
હતું.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Hazeldine, do hereby declare that the nature of my said Invention,
and the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof, reference being had to
the Drawing hereunto annexed, and to the figures and letters marked thereon,
that is to say:-
My Invention relates to that class of furnaces where the fuel is continuously
moved in at the front part of the furnace, and progressively moved onwards to
the end of the furnace, where the ashes of the well-burned fuel are allowed to
pass out or drop from the furnace. And I would state that various modes of
moving the fire bars used in furnaces, so as to cause the fuel to travel thereon,
have before been resorted to, and the bars, which in some cases have been
placed transversely, and in others longitudinally, of the furnaces have been
caused to vibrate and oscillate by various arrangements of machinery, and for
some of such furnaces Patents have been taken; and I mention these matters
in order that my Invention, and the extent thercof, may be the more fully
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Hazeldine, do hereby declare that the nature of my said Invention,
and the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof, reference being had to
the Drawing hereunto annexed, and to the figures and letters marked thereon,
that is to say :-
My Invention relates to that class of furnaces where the fuel is continuously
moved in at the front part of the furnace, and progressively moved onwards to
the end of the furnace, where the ashes of the well-burned fuel are allowed to
pass out or drop from the furnace. And I would state that various modes of
moving the fire bars used in furnaces, so as to cause the fuel to travel thereon,
have before been resorted to, and the bars, which in some cases have been
placed transversely, and in others longitudinally, of the furnaces have been
caused to vibrate and oscillate by various arrangements of machinery, and for
some of such furnaces Patents have been taken; and I mention these matters
in order that my Invention, and the extent thercof, may be the more fully
understood.
DESCRIPTION OF THE DRAWING.
The Drawing shows a longitudinal section of a furnace constructed according
to my Invention. a, a, is the framing of the furnace, which I prefer to have
so arranged that the whole of the framing, fire bars, and apparatus may be
mounted on wheels, in order that the furnace may be run in and out to facili-
tate repairs; but the same forms no part of my Invention, as furnaces have
before been constructed on wheels in a similar manner. b, b, are the fire bars,
which are constructed and arranged in such manner as to be independent one
of the other, and so as to receive separate oscillating motion one from the other,
and such bars at their lower parts rest in fixed racks at each end, and where
the bars are long there may be intermediate racks to receive and support the
under edges of the bars; and one part of my improvements consists in thus
using racks in combination with oscillating bars, in place of having axes or
necks at the ends of fire bars; so that they may move in bearings, as has before
been resorted to by different parties. The shape of the bars which I prefer to
use and the manner of their working in their racks c are clearly shown. Each
of the bars 6 has a descending projection, from which proceeds a projection b¹
at right angles. The object of which projections 61 is, that a moving rack d
may give to each of the bars a rocking motion. The bars 6 are placed laterally
across the fire-place or furnace, as has been before proposed and used by
various persons; such position does not therefore in itself form any part of my

page_text: b
Invention. At the back end of the furnace is applied a slide, or it might be a
flap plate e, the object of which is that the ashes when they arrive beyond the
last bar 6 may drop out of the furnace: The Drawing shows a slide plate e,,
which moves to and fro with the fire bars; but when it is desired to produce
an opening for the dropping of the ashes which have come to the end of.the.
furnace, the lever a is moved, which raises the connecting rod y, and puts it
out of connection with the feeding apparatus, and the slide c will be moved
back. I would remark that the use of such slide plate is similar to what has.
been used and proposed by Mr. Bodmer and others many years ago; I do not
therefore claim the same as of my Invention. The rocking of the .bars 6 to
and fro will, from the form and arrangement of their upper surfaces, cause the
fuel thereon, to travel from front to back of the furnace, as has been done
before in several furnaces having transverse bars, and I prefer to feed fuel on
to the front bars in the following manner, but do not confine myself thereto.
f is a hopper into which coal is placed for a constant supply of fuel to the
bars b, and the depth of feed is guaged by the sliding-plate g, as has heretofore
been practised in Mr. Juke's and other furnaces. his, a ram moving on axes,.
which as it moves forward from the front of the furnace allows the fuel to fall.
on to the plate i, and as the rammer h goes towards the furnace it pushes the
fuel on to the first fire bar b, from which it is pushed by the second ram j..
which moves towards the furnace bars as the other rammer goes back; by this
arrangement the fuel will be constantly supplied, and the motion of tho bars
will cause the fuel to move towards the back of the furnace. Motioni 'may be
coinmunicated to the bars 6 in various ways: I prefer to give motion thereto
by a rotatory shaft acting on the rack d, for which purpose k is a rotatory shaft
which receives motion from the steam engine; I is a tappet which works in
the frame d formed at the front end of the rack d, by which the rack d is
moved to and fro, and by it the whole of the bars & are made to rock on their
lower edges. Motion is communicated to the feeding apparatus by means of
the arm m, which is moved by the rack d in like manner to the bars b, as
shewn. e is the sliding plate by which the ashes are allowed from time to
time to drop from the back end of the furnace. The plate e is acted on by
means of the connecting rod, as before mentioned, which receives motion
from the feeding apparatus, but is capable of being disconnected therefrom
when the plate e is to be slided back, and this is done by the crank lever handle,
which lifts the front end of the connecting rod off the stud on the feeding
apparatus, and at the same time pushes back the sliding plate e till the clinker
and cinder fall, when the plate e is closed, and the connecting rod is again
lowered so as to be worked by the feeding apparatus.
.

page_text: Having thus described the nature of my Invention, I would remark that
I do not confine myself to the use of the details herein described when carrying
out my Invention! But what I claim is :-
..
First, the mode of constructing and arranging rocking bars 6 in combination
with racks c, as described.
"Secondly, I claim the combination of the rack & with the rocking bars b...
Thirdly, I claim the giving motion to the bars 6 by a rotátory shaft acting
on the rack d.
5
And, fourthly, I claim the mode of feeding 'furnaces by the parts h, 'i, j.**.
In witness whereof, I, the said Thomas' Hazeldine, have hereunto set my 1
hand and seal, this Seventeenth day of November, in the year of our
Lord One thousand eight hundred and forty-seven.
THOMAS (L.S.) HAZELDINE.
AND BE IT REMEMBERED, that on the Seventeenth day of November,
in the year of our Lord 1847, the aforesaid Thomas Hazeldine came before 1
our said Lady the Queen in Her Chancery, and acknowledged the Specifica-
tion aforesaid, and all and everything therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that
purpose.
.Enrolled the Eighteenth day of November, in the year of our Lord One 2
thousand eight hundred and forty-seven.