Apparatus for Preventing or Reducing Back Draught in Chimneys.
Year: 1897

page_text: Date of Application, 29th Apr., 1897-Accepted, 26th June, 1897
COMPLETE SPECIFICATION.
Apparatus for Preventing or Reducing Back Draught in Chimneys.
We, ALFRED EMLEY, Ironmonger, and JAMES SYMINGTON, Blacksmith, both of
37 Orchard Street, Newcastle upon Tyne in the County of Northumberland, 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 :-
This invention relates to an apparatus for the cure of smoky chimneys or flues.
This apparatus is inserted in the chimney or flue as hereinafter described and comprises
a plate, the width of which is made to suit the width of flue. This plate is hinged at
the bottom to facilitate adjustment and for flue cleaning purposes, and may or may not
be provided with a door to enable any soot &c. that may lodge at the back to be
removed the upper part of the plate is provided with a hook, rack, chain or other
means for adjusting the angle of the plate in the flue. Side pieces or plates may be
provided for the better fitting of the plate in the flue, and for keeping the plate
from falling too low, and thus closing the flue. Instead of hinging the plate, it
may be fixed to the sides of the flue and provided with a telescopic extension so
that the size of the flue passage can be regulated. The position of the plate in
the flue is preferably immediately above the stove, and preferably controlling the
space between the back of the Alue and the front, the air in the angular space
between the plate and the front of the flue thus forming a cushion.
In the annexed drawing:-
Fig. 1 is a vertical section showing the arrangement of the plate in the flue.
Fig. 2 is a front elevation of a hinged plate. Fig. 3 is a side elevation and Fig. 4 a
plan thereof.
Fig. 5 is a top plan of a telescopic plate, Fig. 6 is a side elevation; and Fig. 7 a
bottom plan thereof.
A is the plate hinged at B with the upper part A¹ bent so as to be approximately
vertical in the flue when in position. A is a sliding piece sliding in grooves made by
turning over a part or piece A* fixed to or in one piece with plate A, A³ are slotted
plates fixed to plate A sliding over plate A on the opposite side to plate A² and
provided with slots K, through which project bolts L for fixing the plates A³ and thus
the plate A² to plate A. Care side plates each with flange E for fixing to the wall by
means of bolts &c. and lips D for preventing plate A falling too far. F is a door in
plate A hinged at H. J wings on plate A provided with bolt holes for fixing to fine
sides. In Fig. 1 M is the flue N the stove, Ġ is the hook chain; rack or other means
for holding plate A in position; Fig. 3 shows in dotted lines the position which plate A
will assume when the flue is being swept.
It will be apparent from Fig. that this plate occupies an angular position in
the flue above the stove and narrows the passage way in the flue more or less,
this having the effect of preventing back draught upon the smoke from the fire
in grate N.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
Apparatus for preventing or reducing back draught in chimneys consisting of a
plate occupying an angular position in the flue above the grate substantially as

page_text: indicated in the drawings, the said plate being hinged or made extensible for
adjustment and for giving free passage when sweeping said chimneys, substantially as
set forth.
0011
1
^ A
+1 1007
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, W.C., Agents to Applicants.