Improvements in Boiler Furnaces for Facilitating the Removal of Ash and Olinker.
Year: 1893

page_text: Date of Application, 1st Feb., 1893
Complete Specification Left, 20'h Nov., 1893-Accepted, 23rd Dec., 1893
TROYINIONAL SPECIFICATION.
Improvements in Boiler Furnaces for Facilitating the Removal of
Ash and Olinker.
I, WILLIAM ARTHUR GRANGER of 15 Foulden Road, Stoke Newington, in the
County of Middlesex, Engineer, do hereby declare the nature of this invention to
be as follows:—
My invention relates to an improved construction and arrangement of the back
fire bars of boiler furnaces for facilitating the removal of ash and clinker and for
maintaining a clean fire, and it is more especially applicable to the furnaces of
Lancashire, Cornish and marine boilers.
Hitherto it has been difficult to thoroughly clean the back portions of the fires in
auch boilers, owing to distance from the furnace mouth and to exposure of the
stoker to the great heat radiated through the open fire door. Now in my improved
furnace, while the front set of fire bars are substantially of the ordinary type
supported in the usual manner, 1 cast or otherwise construct the back set of fire
bars in one piece which forms a species of grating, and I so arrange it that it shall be
moveable lengthways in the furnace, preferably by either constructing it to slide or
roll upon supports attached to the furnace or to roll upon wheels or rollers fixed
therein.
When it is desired to clean the back of the fire (it being then preferably in a
thin condition and the fire on the front bars being well supplied with fuel) the
moveable set of bars or grating is slid or pushed backwards under the bridge,
whereupon the nsh & clinker fall into the ashpit or into a scoop placed therein for
their reception.
The moveable grating is then pulled forward into its working position and the fire
from the front bars spread over it.
The bridge may be supported on cross bars or bearers to permit of the moveable
grating passing beneath it and I provide suitable lugs or their equivalents on the
moveable grating to allow of it being readily moved backwards and forwards by
means of a hooked rod, or the like, worked by the stoker.
Dated this First day of February 1893.
WILLIAM ARTHUR GRANGER.
COMPLETE SPECIFICATION.
Improvements in Boiler Furnaces for Facilitating the Removal of
Ash and Olinker.
A communication from Wx. Lewis, of 8, Jane Street, Balmain, near Sydney,
Australia, Engineer.
I, WILLIAM ARTHUR GRANGER of 102 Brooke Road Stoke Newington
London, N. (and late of 15 Foulden Road N.) 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 :-
My invention relates to an improved construction and arrangement of the back
fire bars of boiler furnaces, for facilitating the removal of ash and clinker and
for maintaining a clean fire and it is more especially applicable to the furnaces of
Lancashire, Cornish and marine boilers.
Hitherto it has been difficult to thoroughly clean the back portions of the fires in
such boilers owing to distance from the furnace mouth and to exposure of the stoker
to the great hent radiated through the open fire door. Now in my improved

page_text: furnace, while the front set of fire bars are substantially of the ordinary type
supported in the usual manner, I cast or otherwise construct the back set of fire
bars in one piece which forms a species of grating, and I so arrange it that it shall
be moveable lengthways in the furnace, preferably by either constructing it to
slide or roll upon supports attached to the furnace, or to roll upon wheels or rollers 5
fixed therein.
When it is desired to clean the back of the fire (it being then preferably in a
.. thin condition and the fire on the front bars being woll supplied with fuel) the
moveable set of bars or grating is slid or pushed backwards under the bridge,
whereupon the ash and clinker fall into the ashpit or into a scoop placed therein t
for their reception. The moveable grating is then pulled forward into its working
position and the fire from the front bars spread over it.
The bridge may be supported on cross bars or bearers to permit of the moveable
grating passing beneath it, and I provide suitable lugs or their equivalents on the.
grating to allow of it being readily moved backwards and forwards by means of a 1
booked rod or the like worked by the stoker.
In the accompanying drawings of my improved furnace Fig. 1 is a longitudinal
section; Fig. 2a front elevation; and Fig. 3 shows a plan of the moveable
grating or back fire bars.
The same reference letters are used in all these figures to denote similar parts of 2
the furnace.
In Fig. 1, a shows the front set of fire bars of the ordinary type, and ↳ the back
set made in one piece, thus forming a grating as shown more clearly in Fig. 3. It
is so arranged as to be capable of a longitudinal movement and is shown in its
forward or ordinary working position. The small wheels or rollers on each 2
side of the flue upon which the grating rests are for facilitating its movement and
they may be pivotted to bars such as attached to the flue.
In some cases I arrange the grating to slide direct upon the bars, or it may be.
provided with wheels for running on similar bars.
The bridge is supported on a bearer g having a clear space beneath it to permit 2
of the backward travel of the grating which is easily moved backwards and
forwards by means of a rod connected to the holes in the lug d.
The operation of cleaning the back portion of the fire by pushing the moveable
grating backwards under the bridge has already been described.
Having now particularly described and ascertained the nature of my said inven- 3
tion and in what manner the same is to be performed, as communicated to me by
my correspondent abroad, it is declared that what is claimed is :-
(1) The opening of the furnace at the back end by means of the moveable
grating for the purpose set forth and described.
(2) The general arrangement and combination of parts constituting the improved 4
furnace, constructed substantially as described and shown in the drawings.
Dated this 20th day of November 1893.
117 A GRANARD
A GRANGED