ECRAN EN VERRE A RIDEAU D'AIR POUR FOYERS ET POELES A BOIS

GLASS FIRESCREEN WITH AIR CURTAIN FOR WOOD STOVES AND FIRPLACES

Abrégé anglais

ABSTRACT

A conventional firescreen made from a heat resistant
glass, used for an open wood burning stove or fireplace, is known
to be much more efficient in the prevention of heat loss than a
firescreen made from a steel wire mesh or a perforated steel
plate. However, the glass firescreen can easily become stained
by soot and smoke which therefore requires numerous cleanings.
There is also the possibility of the glass shattering if a fire
is allowed to become too large and hot. In this invention, the
glass firescreen has an air intake diverting plate situated behind
the glass plate at the lower and/or side portions of the glass
frame allowing the formation of a moving air curtain over the rear
surface of the glass which will protect the glass from the soot,
smoke and excessive heat, and thereby assist in preventing said stain
formation.

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Revendications

The embodiments of the invention in which an exclusive property
or privilege is claimed as defined as follows;

1. A firescreen for placement within a fireplace surround
comprising;
a frame having at least a lower edge and two side
edges;
a heat resistant glass plate mounted by the frame;
mounting means to hold the frame in spaced relationship
from said surround and to provide a continuous elongate air inlet
slit along one edge of said frame,
an air intake diverting member mounted by the frame
behind the air inlet slit to provide over the rear surface of the
glass plate a moving air curtain for inhibition of deposit thereon
of soot and smoke from the fire, said elongate slit providing an
unencumbered air inlet duct for said diverting member.



2. A firescreen as defined in claim 1 in which the air
intake diverting member is an L-shape plate.


3. A firescreen as defined in claim 1 in which the air
intake diverting member is a half moon shape plate.



4. A firescreen as claimed in any one of claims 1 to 3
in which the air intake diverting member has a throttled outlet
opening at an acute angle toward the glass plate.


5. A firescreen as claimed in any one of claims 1 to 3
wherein said mounting means includes brackets engageable with a
horizontal portion of said surround to hold said frame above said
horizontal portion.

6. A firescreen as claimed in any one of claims 1 to 3
wherein said mounting means comprises a hinge.

7. A firescreen as claimed in any one of claims 1 to 3 in
which the air intake diverting member is movable to vary an outlet
opening provided between the glass plate and said air intake
diverting member.

8. A firescreen as claimed in any one of claims 1 to 3
and comprising a double door constituted by two heat resistant
glass plates and two frames to hold the plates.



9. A firescreen as claimed in any one of claims 1 to 3
in which two air intake diverting members are one on each side
of the frame.



10. A firescreen as claimed in any one of claims 1 to 3
and comprising a bi-fold four-door firescreen constituted by
four heat-resistant glass plates and four frames to hold the
plates.

Description

~Z'i~ 3~

GLASS FIRESCREEN WITH AIR CURTAIN FOR WOOD STOVES AND FIREPI~CES
Field of the Invention
This invention relate~ to a glass firescreen ~or a stove
or fireplace~ particularly an open wood burning ~tove or fireplace.
S Review of the Prior Art

. _
The known firescreens made from a steel wire mesh or per-
forated steel plate will prevent the escape of sparks and allows the
viewing of the fully open fire but also aIlows air to be sucked up
the c~imn~y unhindered, causing a large draft which pulls an unduly
large part of the heat up the chimney and also feeds the fire which
increases the speed of consumption of the fuelO A glass firescreen
permits the desirable viewing of the fire, and transmission of
radiant heat, and also reduces the amount of air reaching the fire~
It therefore does not have the problems mentioned above to the same
extent, but requires frequent cleaning of the inner surface of the
glass due to stains caused by soot and smoke. There is also the
problem of the glass possibly shattering if the fire is allowed
to become too large and hot.
It has been found that these disadvantages can be over-
come by providing at least one air intake..diverting member such
as a plate that runs along the whole length of one o~ the lower or
side portions of the frame`where air is taken in for combustion~
The plate(s) will deflect intaken air upward or sid~ways toward
the glass forming an air curtain to protect the inner surface of
the glass from the soot, smoke and excessive heat~ decreasing the
need for the cleaning of the scr~en.


.

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Thus, a firescxeen fo~ place~ent within a $ixepl~ce
surround comy~isin~;
a ~rame h~vin~ at least a lower edge and tWo side
edges;
a heat resistant glass plate mounted by the frame;
mounting means to hold the frame in spaced relationship
from said surround and to provide a continuous elongate air inlet
slit along one edge of said frame,
an air intake diverting member mounted by the frame
behind the air inlet slit to provide over the rear surface of the
glass plate a moving air curtain for inhibition o~ deposit thereon
of soot and smok~ from the fire, said elongate slit providing an
unencumbered air inlet duct for said diverting member.
Description of the DraWings
Particular preferred embodiments of the invention will
now be described, by way of example, with reference to the accom-
panying drawings wherein:
FIGURE 1 is a front view of a removable glass firescrren
for an open wood burning stove,
FIGURE 2 is an enlarged sectional view taken on the
line 2-2 of Figure 1,
FIGURE 3 is an enlarged cross-section of the air intake
diverting plate shown in Figure 2, while FIGURE 3a shows a divert-
ing plate of different shape,
FIGURE 4 is a front view of a glass firescreen for a
wood stove or fireplace having the form of a door with hinges at one
end,

3~L


FIGURE 5 shows ~ sectional view of a controlled air
intake diverting plate in a ~ide open position, taken on the line
5-5 of Figure 4, while FIGURE 5a shows an alternate shape diverting
plate,




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~,

' :

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FIGURE 6 show~ the controlled air intake diverting plate
of Figure S in a closed position,
FIGURE 7 is a front view of a dou~le-door gla~ fire~creen
for ~ood stoves or fireplaces, and
S FIGURE 8 i~ a front view of a double door gla~ firescreen
for a fireplac~ having an unusually tall opening.
Descri tion of the Preferred Embodiments
P _. _
The glass firescreen illu3trated in Figure 1, compri~e~
a h,eat resistant glass plate 1 held by a frame 2, and an air intake

div'erting member constituted by plate 3 attached to brackeks 4 which
with the hel~ of upper hook~ 5'hold the glass firescreen in place
before the fireplace. Two handle~ 6 are pxovided at opposite ends
of the frame 2 for the easy lifting and placingin position of the

glass fire~creen. The ~lass plate sits- within the frame 2 on
saddle plates 7 fastened by rivets 8 to the frame. At least part

of the air supply for the stove passes up through the base sec~ion
of the frame 2 and is diverted upward in the form of a moving cur-
tain across the rear or inner surface of the glass by the air intake

diverting plate 3 so as to i~hibit the deposition thereon of soot
or smoke and to protec~ the glass against excessive hea~. The

plate is inclined toward the rear face of the glass plate to provide
a throt$1ed outlet opening to~ard the pla~e. A small gap is allowed
between the stove and the screen running along all vf the sides

of the screen in order to induce sufficient air in~ake to form a
complete air curtain that shields the glas~0 The upper hooks 5


have air intake h~les to preven$ the blockage of the a~r supply
from the top of the frame 2 and con~equent formation of stainsO
The to~al amoun~ of intake air to the ~tove will be controlled by
-- 4


~ 7~

the damper of the stove ~ocated at the st~ve outlet pipe. The air
in~ake diverting plate shown in Figure 3 i8 of L~hape, while that
shown in Figùre 3a i~ of hal moon shapQ.
The invention can also be adapted to variou~ kind~ o~
glass firescreens for wood ~toves or fir~place~ as follow~:
T~e firescreen illustrated in Figure 4 i8 a ~ingle door
firescreen with hin~es 9 at one ~ide. The air intake divertlng
plate~ 10, shown most clearly in Figuxe 4, is movable by any ~uitable
con`trol mechanism (not shown~ ~or the closing and opening of the
air intake. Thï~ control mechani~m is attachea to the fixed frame
part 11, which iB actually a section of a stove opening or the
outer frame of a fireplace firescr~en. The open and closed posi-
tions of the air intake diverting plate 10 are ~hown in Figure 5

and Figure 6 respectively. The shape of the air intake diver~ing
plate in Figure 5 i~ also an L-shape while that in Figure 5a is
also haif moon ~hape. The control mechanism of the air intake
diverting plate will not be disclosed in this patent application~
The glass fire~creen illustrated in Figure 7 has the
same air intaXe diverting plate arrangement as the screen shown
in Figure 4, except that this is a double door firescreen. ~hiY
arrangement for an air intake diverting plate 12 can also be
applied to a bi-fold four-door glass fire~creen.
The glass firescreen illustrated in Figure 8 is for an

unusually tall firescreen opening and i8 provided with two,
controlled, vertical air intake diverting plate~ 13 ~ituated one
at each vertical edge of the fire~creen~