GRA
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Isaac Dunbar at the
Office of the Commissioners of Patents on the 19th February 1883.
ISAAC DUNBAR of Coalbrookdale Shropshire Foreman Fitter
IN FIRE GRATES
"
"IMPROVEMENTS
The object of my invention is to make the same fire grate or fire grates of the
same size capable of being used with openings of different sizes in chimney pieces.
For this purpose I make the panels or cheeks of the fire grate capable of lateral
adjustment and I construct the fire grate proper commonly called the "interior
with which the adjustable panels or cheeks are fitted substantially in the manner
herein after described.
"
In constructing a fire grate according to my invention I form along each of the
vertical edges of the fixed part or "interior" of the fire grate a beading or flange
having a breadth say from one to two inches, the said beadings or flanges
extending nearly from top to bottom of the grate. At the back of and parallel to
each of these beadings or flanges I form three or more lugs carrying fixing set
screws. These set screws are situated at the back of the fixed fire grate and access
to them is obtained for fixing the adjustable panels or cheeks by removing the tile
panels from the said adjustable panels or cheeks. I form on the inner vertical edge
of each of the adjustable panels or cheeks a web or extension piece having say a
breadth of from one to two inches the said webs or extension pieces being parallel
to the beadings or flanges on the grate and capable of sliding between the back of
the said beadings or flanges and the lugs described on the grate. By sliding the
adjustable panels or cheeks to or from each other their webs pass to a greater
or less distance between the vertical flanges and lugs on the grate so as virtually
to increase or diminish the width of the grate. The panels or cheeks are thus
adjusted to the width of the opening in the chimney piece in which the fire grate
is fitted. After their adjustment the panels or cheeks are fixed in their places
against the beadings or flanges of the grate by the set screws in the lugs described
A

page_text: access to the set screws being obtained by removing the tile panels which are so
constructed that they can be readily removed from and replaced in the adjustable
panels or cheeks of the grate. The said adjustable panels or cheeks are further
fixed in their places by means of a top plate which is fixed by means of screws
passed from the upper side of it screwed into the tops of the panels or cheeks
In this way the adjustable panels or cheeks of the grate may be made to suit
the opening in the chimney piece the extension or contraction of the adjustable
panels or cheeks and their fixing being readily effected by the arrangement of
parts described
I do not limit myself (to any particular breadth of the beadings or flanges of
the fixed grate and the webs or extension pieces of the adjustable panels or cheeks
as they may be varied to suit the particular kinds of grates with which they are to
be used.
The removable panels or frames carried by the adjustable panels or cheeks of
the grate may be used for holding an ornamental or other plate instead of tiles
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Isaac Dunbar in the Great Seal Patent Office on the 8th August
.
1883.
ISAAC DUNBAR of Coalbrookdale, Shropshire, Foreman Fitter.
IN FIRE GRATES
"
"IMPROVEMENTS
The object of my invention is to make the same fire grate, or fire grates of the
same size, capable of being used with openings of different sizes in the chimney
pieces. For this purpose I make the panels or cheeks of the fire grate capable of
lateral adjustment and I construct the fire grate proper commonly called the
"interior," with which the adjustable panels or cheeks are fitted substantially in
the manner hereinafter described.
In constructing a fire grate according to my invention I form along each of the
vertical edges of the fixed part or "interior" of the fire grate a beading or flange
having a breadth say from one to two inches, the said beadings or flanges
extending nearly from top to bottom of the grate. At the back of the interior I
form three or more lugs carrying fixing set screws. These set screws are situated
at the back of the fixed fire grate and access to them is obtained for fixing the
adjustable panels or cheeks by removing the tile panels from the said adjustable
panels or cheeks
I form on the inner vertical edge of each of the adjustable panels or cheeks a
web or extension piece having, say, a breadth of from one to two inches, the said
webs or extension pieces being parallel to the beadings or flanges on the grate and
capable of sliding between the back of the said beadings or flanges and the lugs
described on the grate. By sliding the adjustable panels or cheeks to or from

page_text: each other, their webs pass to a greater or less distance between the vertical
flanges and lugs on the grate so as virtually to increase or diminish the width of
the grate. The panels or cheeks are thus adjusted to the width of the opening in
the chimney piece in which the fire grate is fitted. After their adjustment, the
panels or cheeks are fixed in their places against the beadings or flanges of the
grate by the set screws in the lugs described, access to the set screws being
obtained by removing the tile panels which are so constructed that they can be
readily removed from and replaced in the adjustable panels or cheeks of the grate..
The said adjustable panels or cheeks are further fixed in their places by means of
a top plate which is fixed by means of screws passed from the upper side of it
screwed into the tops of the panels or cheeks.
In this way the adjustable panels or cheeks of the grate may be made to suit
the opening in the chimney piece, the extension or contraction of the adjustable
panels or cheeks and their fixing being readily effected by the arrangement of
parts described.
I will now describe with reference to the accompanying Drawing the manner in
which my invention is to be performed.
Figure 1 represents in front elevation; Figure 2 in side elevation; Figure 3 in
plan, with the top fixing plate removed, and Figure 4 in plan with the said top
fixing plate in position, a fire grate constructed according to my invention. The
same letters of reference indicate the same parts in the several Figures of the
Drawing.
a is the fixed part of the grate commonly called the "interior;" 66 are the
fire bars and o the bottom bar or grating (see Figure 2); d, d², d, d are the
adjustable panels or cheeks of the fire grate and e are the lift out or removeable
tile panels or frames carried by the said adjustable panels or cheeks; ff are the
tiles secured in the said panels or frames ƒ (see Figure 3). Affixed to the back of
the interior a, a are three (or more) lugs h, h, h each lug carrying a fixing set
screw and access to the set screws i is obtained for fixing the adjustable panels
or cheeks d, d'; d, d' by removing the tile panels or frames e from the said
adjustable panels or cheeks. The position of the lugs h, h, h and their set screws
will be readily understood by an examination of the end elevation Figure 2 and
plan Figure 3.
On the inner vertical edge of each of the adjustable panels or cheeks, a web or
extension piece is made. These webs or extension pieces may have a breadth
of from one to two inches and are situated parallel to the beadings or flanges g g
on the fixed part or interior a of the grate and are capable of sliding between the
back of the said beadings or flanges ad and the lugs h, h on the said interior a
(see the plan Figure 3) By sliding the panels or cheeks d, d to or from one
another, their webs or extension pieces d' pass to a greater or less distance between
the vertical flanges g g and lugs h h on the fixed interior a so as virtually to
increase or diminish the width of the grate. The panels or cheeks d, d can thus
be adjusted to the width of the opening in the chimney piece in which the grate is
fitted. In Figures 1 and 3 the adjustable panel or cheek d, d' on the right hand
side of the grate is represented in its fully withdrawn or extended position and
the adjustable panel or cheek d, d' on the left hand side of the grate is represented
in its fully closed or pushed in position. After the panels or cheeks d, d have
been adjusted they are fixed in their adjusted position by means of the set
screws i, i, access to which set screws is obtained as herein before explained by
removing the slip out tile panels or frames e, e carried by the said adjustable panels
or cheeks d, d. It will be seen by an examination of Figure 3 that the tile
panels are so constructed that they can by a sliding motion be removed from and
replaced in the adjustable panels or cheeks d, d².
The panels or cheeks d d are fixed in their places at top by the fixing plate k
(see Figure 4) which is secured in its place by the screws, These screws pass
through slots m, m in the plate k and screw into holes in the tops of the
panels dď. The slots m, m permit of the fixing of the panels in their adjusted

page_text: positions. The plate k is also secured to the top of the interior a by the
screw at n.
I do not limit myself to any particular breadth of the beadings or flanges g g of
the fixed part of the grate and the webs or extension pieces d' d of the adjustable
panels or cheeks as they may be varied to suit the particular kinds of grates with
which they are to be used.
The removeable panels or frames e, e carried by the adjustable panels or
cheeks d, d of the grate may be used for holding an ornamental or other plate
instead of tiles and my improvements may be used with splayed or flat panels.
Having now described the nature of my invention and the manner in which the
same is to be performed I wish it to be understood that I claim as my invention―
The improvements in fire grates herein before described and illustrated in the
accompanying Drawing; that is to say, making the panels or cheeks of fire grates
capable of lateral adjustment so as to permit of the same fire grate or fire grates
of the same size being used with openings of different sizes in chimney pieces, the
said adjustable panels or cheeks together with the other parts of the grate used
with the said adjustable panels or cheeks, being constructed and combined or
_arranged substantially as described and illustrated.
In witness whereof I the said Isaac Dunbar have hereunto set my hand and
seal this thirtieth day of July in the year of our Lord one thousand eight
hundred and eighty three.