Improved Radiator for Warming Buildings and Utilizing Heat Wasted in Chimneys.
Year: 1892

page_text: Date of Application, 17th Nov.; 1892
Complete Specification Left, 12th May, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improved Radiator for Warming Buildings and Utilizing Heat
Wasted in Chimneys.
JOHN HENRY KNIGHT Barfield Farnham County of Surrey Engineer and
Landowner do hereby declare the nature of this invention to be as follows:-
The object of this invention is to utilize some of the waste heat which passes up
the chimnies of the ordinary domestic fire-places, or cooking ranges; to transfer
the otherwise wasted heat from the chimney into a room or rooms or passages on an
upper floor.
This invention is applicable to existing houses and can be fitted therein at a very
moderate cost.
I insert in the wall of a chimney and in the room to be warmed, a plate or
preferably a casting which has ribs, grills or grids or rods projecting into the
chimney space, these take up the heat which would otherwise be wasted; there are
also ribs, grills grids or rods on the other side projecting towards or into the room
to be beated; these ribs may be in the wall space, and not project, or project very
slightly into the room, these ribs heated by conduction from the ribs in the
chimney heat the surrounding air and cause a current to draw upwards amongst
them, and thus warm the room.
The radiator may be simply built into the chimney but this method is open to
the objection of the difficulty of cleaning it; also that the expansion and
contraction of the metal will (after a lengthened period) cause the radiator to
become loose and require resetting. It is also sometimes desirable to be able to
remove the radiator in summer, I therefore make on the face of the chimney a
facing or flange of cement or even of iron; if of the latter it is kept as far away
from the heat as possible; and I attach to this facing of cement or of cool metal
the radiator by means of screws or other suitable method, a packing of asbestos or
other suitable non conducting material intervening and making a smoke tight
joint. This allows the radiator to expand or contract without getting loose in the
setting.
The radiator can be hinged so as to swing out to facilitate cleaning.
In summer or when not required the radiator can be replaced by a plate of metal
with a non conducting covering on the side facing the interior of the chimney, & if
desired on exterior face also.
The ribs or grids may be corrugated or made zigzag, or arranged to break joint
with one another.
Dated this 16th day of November 1892.
COMPLETE SPECIFICATION.
'Improved Radiator for Warming Buildings and Utilizing Heat
Wasted in Chimneys.
JOHN HENRY KNIGHT of Barfield Farnham County of Surrey Engineer &
Landowner 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 :-
3.
The object of this invention is to utilize some of the waste heat which passes up

page_text: the chimneys of the ordinary domestic fire grate or cooking range. To transfer
the otherwise wasted heat from the chimney into a room or rooms or passages on an
upper floor.
The invention is applicable to existing houses, and can be fitted therein at a very
moderate cost.
I insert in the wall of the chimney and in the room to be warmed, the radiator,
which consists of a plate, or casting, having grills grids or rods projecting into the
chimney space; these take up the heat which would otherwise be wasted; there are
also ribs, grills, or rods on the other side of the plate or casting, projecting towards
or into the room to be heated. These ribs or grills may be in the wall space, and
not project, or project very slightly into the room; these ribs or grills heated by
conduction from the ribs in the chimney heat the surrounding air, and cause a
current to draw upwards amongst them and thus warm the room.
The radiator may be simply built into the chimney, but this method of applying
it is open to the objection of the difficulty of cleaning it; also that the expansion
and contraction of the metal will after a few weeks or months cause the radiator
to become loose and require resetting.
It is also sometimes desirable to be able to remove the radiator in summer.
I therefore prefer to make on the face of the chimney a facing or flange of
cement, or even of metal, if of the latter it is kept as far away from the heat as
possible; and I attach to the facing of cement or of cool metal, the radiator by
screws or other suitable means, a packing of asbestos, or some non-conducting
material intervening, and making a smoke tight joint. This allows radiator to
expand or contract without getting loose in its setting.
The radiator may be hinged or pivotted so as to swing out to facilitate cleaning,
the greater part of the weight of the apparatus being thus born by the hinge or
fulcrum.
In summer or when radiator is not required it can be replaced by a plate of metal
with a non conducting covering on the side facing interior of chimney.
The ribs or grills may be corrugated, or made zigzag, or arranged to break joint
with one another.
In the drawings
Fig. 1 is a section in plan of a chimney with radiator fitted therein. Fig. 2 is a
vertical section of same.
Fig. 3 is the front view of radiator as seen from room when it is in its place.
A is chimney.
B radiator with grills e projecting into the chimney; d grills or ribs projecting
towards or into the room to be heated.
C flange or facing fixed to chimney wall for attaching the radiator to.
F hinge or pivot to support radiator when it is removed for cleaning; it then
swings out as shewn by dotted lines at H in Fig. 2.
G screws and nuts for keeping radiator in its place.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. A heat saving radiator as described above, with grills, grids or rods, or the
like, projecting into the chimney and conducting the heat to grills or grids
projecting towards or into the room to be heated; the radiator being built into the
wall of a chimney.
2. A similar radiator attached to a fixed metal or cement facing, by screws or
like attachments, and a smoke tight joint being made by a non conducting
material.
3. Placing radiator in the wall space and not projecting into the room.
4. Attaching radiator by a hinge or pivot, or its equivalent to the wall of the

page_text: chimney, or to the metal facing, that it may swing out into the room to facilitate
cleaning.
5. The removable radiator, & substituting a plate, with a non conducting covering
on side exposed to heat, when radiator is not required.
Dated this 10th day of May 1893.
JOHN HENRY KNIGHT.