Improvements in and relating to Appliances for the Prevention of Blow Downs in Chimneys.
Year: 1899

page_text: Date of Application, 17th May, 1899
• Complete Specification Left. 17th Feb., 1900-Accepted, 24th Mar.,
1900
Improvements in and relating to Appliances for the Prevention of
Blow Downs in Chimneys.
I, ROBERT BRIGHAM, of 4, Uplands Road, Stroud, Gloucestershire, Clerk of
Works, do hereby declare the nature of my invention to be as follows:-
This invention has reference to and comprises improvements in and relating
to appliances for the prevention of blow downs in chimneys, which will be both
simple and effective.
The improvements of this invention are carried into practice by fitting within
the bottom of the vent preferably immediately above the fireplace a special
appliance constructed as will be described.
The appliance is preferably formed in two parts of fireclay, metal, or other
suitable material. The first part which is fitted a short distance above the
line of the arch of the fireplace opening is formed as an approximately rectangular
casing, open at top and bottom. A vertical or it may be an angled groove is
formed on each side by duplex ribs to receive a dividing partition which is
secured in position by pins or other means after being slipped into the grooves,
thus dividing the casing into right and left spaces, otherwise the casing and
dividing partition may be formed all in one piece. A second casing of the same
material is built or fitted on to the top of the lower casing, of the same dimen-
sions at the bottom but contracting at the top to the dimensions of an ordinary
vent. The top opening of this second casing may be directly over the dividing
partition or it may be at one side over one of the divisions. In the first case
it is necessary to continue the vent upwards at an angle, and in the second case
while it is preferable to do so it is not necessary.
Instead of placing the appliance immediately, over the fireplace it may be placed
to one side or in any suitable part of the vent.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Appliances for
Blow Downs in Chimneys.
I, ROBERT BRIGHAM, of 4, Uplands Road, Stroud, Gloucestershire, Clerk of
Works, do hereby declare the nature of my invention, and in what manner the

page_text: same is to be performed to be particularly described and ascertained in and by
the following statement in writing reference being made to the accompanying
drawings:-
This invention has reference to and comprises improvements in and relating
to appliances for the prevention of blow downs in chimneys, which will be both
simple and effective.
And in order that my invention may be properly understood I have hereunto
appended one sheet of explanatory drawings in which Figure 1 is a front sectional
elevation of a fireplace and part of a vent showing the application of my improve-
ments, Figure 2 is the same but as applied to a narrower fireplace and having
the appliance reversed, while Figure is another sectional elevation showing
another arrangement of the appliance. Figure 4 shows the details of the lower
part of the appliance and Figure 5 shows a sectional elevation and a plan of the
upper part of same.
Referring to these drawings:-
The improvements of this invention are carried into practice by fitting within
the bottom of the vent A preferably immediately above the fireplace a special
appliance B B' constructed as follows.
The appliance is preferably formed in two parts B and B of fireclay, metal,
or other suitable material. The first part B which is fitted a short distance above
the line of the arch of the fireplace opening C is formed as an approximately
rectangular casing, open at top and bottom. A vertical groove as shown, or
it may be an angled groove, is formed on each side by duplex ribs b¹ to receive
a dividing partition which is secured in position by pins 63, or other means,
after being slipped into the grooves 6 thus dividing the casing into right and left
spaces, otherwise, however, the casing and dividing partition may be formed all
in one piece. A second casing B₁ of similar material is built or fitted on to the
top of the lower casing B, of the same dimensions at the bottom but contracting
at the top to the dimensions of an ordinary vent. The top opening B2 of this
second casing B¹ may be directly over the dividing partition 2 as shown in
Figure 3, or it may be at one side over one of the divisions as shown in Figures 1
and 2. In the first case it is necessary to continue the vent A upwards at an
angle to either side as suitable, and in the second case while it is preferable to
do so it is not necessary, all as indicated in dotted lines.
Instead of placing the appliance immediately over the fireplace it may be
placed to one side or in any suitable part of the vent..
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what
I claim is:―
First. Appliances for the prevention of blow downs in chimneys constructed
and arranged substantially as herein described and illustrated by the accom-
panying drawings.
Second. Appliances for the prevention of blow downs in chimneys consisting
of a lower part divided by a partition and an upper part contracted at the top
and arranged substantially as herein described and illustrated by the accompanying
drawings.
Th
1Gil
1000