A Smoke Preventer, being an Improved Method of Curing Smoky Chimneys.
Year: 1898

page_text: Date of Application, 21st Feb., 1898-Accepted, 9th July, 1898
COMPLETE SPECIFICATION.
A Smoke Preventer, being an Improved Method of Curing Smoky
Chimneys.
I, THOMAS SHEPPARD, of No. 5, Grocers Hall Court, in the City of London,
Engineer, 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:-
My invention relates to the means method and device to be employed for the
prevention and cure of smoke being emitted from the stove furnace or receptacle
used for the combustion of coal or other fuel into the room or space in which
such stove furnace or receptacle is fixed or placed other than through the
chimney flue or shaft erected above the same for the purpose of carrying such
smoke upwards and into the open air.
According to this my said invention a sheet or plate of iron zinc or copper or
other suitable material of a sufficient strength to support the cone hereinafter
mentioned of the shape of the chimney or flue B Figure 1 is fixed immediately
above the existing stove E Figure 1 or furnace and supported in position by
holdfasts iron stays or other appliances and for preference hermetically sealed
to the sides of the chimney or flue by fireclay cement or other suitable material.
The plate is fixed with a circular or conveniently shaped aperture A. Figure 2
preferably from eight to ten inches in diameter in or near the centre of the plate
with two slots b, b, Figure 2 at right angles to the aperture each about half an
inch square to allow an iron or other metal bar fixed to the base of the cone
hereinafter mentioned being passed through the plate by means of these slots
to enable the cone and bar to be turned so that the flanges or ends of bar a a
Figure 2 may rest on the upper surface of the plate and so support the cone in
an upright or other position in the centre of the chimney or flue.
Attached to the cone Figure 1 letter A, c, c forming part of the bar Figure 2,
a, a, are 2 flanges on the ends of bar a, a, Figure 2 which pass through the
slots, b, b, in the plate B Figure 2 and rest on the upper surface of the plate by
turning the cone and bar to the right or left, as shewn for the purpose of pre-
venting the cone from falling below the plate, the bar may be attached to the cone
by any convenient contrivance, the base of the cone is turned up with a rim
deeper or wider than the depth or width of the slot in the plate for the purpose
of covering the slots, b, b, and keeping air or smoke from returning below the
plate through slots b, b, and for supporting the upright set of the cone and
keeping it in a perpendicular or upright position.
Figure 3, A, is the cone. B the plate. C, C, the flanges or ends of cross bar a a
Figure 2 as fixed to bar or cone. D the bar with upper flanges attached, no
particular form of flange for the purpose is claimed as part of the invention,
but any flange or adjustment suitable for the purpose can be used or applied. The
cone A Figure 1 can be made of copper, galvanized iron zinc or other suitable
material either wrought or sheet of the same or less thickness or gauge as the
plate before described and should or may be made for the purpose of this
invention from 2 feet to 3 feet and sufficiently wide at the base to allow it to
гр.

page_text: pass through the hole or aperture in the plate to within about two inches of
such base which may be turned up with a rim to that extent, or so made as
to cover the slots, b, b, Figure 2 and so that such rim may fit close up to the
underside of the plate as aforesaid.
The diameter of the top of the cone which stands upwards or upright in the
chimney or flue above the plate should be reduced to about one third the diameter
of the base or foot of the cone or for preference a cone of 10 inches diameter at
the base should be 4 in. diameter at the top of the cone 3 feet long and so on in
proportion. The length of the cone is only limited to its adaptabillity to be
removed and taken out from above the plate for the purpose of sweeping or
otherwise cleaning the chimney or flue by the depth it can be brought down to
enable its entire removal during that process without taking out the fixed grate
or stove, or other receptacle for the coal or fuel used for combustion and heating
purposes. Although the invention is more particularly suitable for houses rooms
offices kitchens and the like using ranges register and other stoves it is applicable
to all chimneys or flues.
It can be fixed and applied to all existing stoves or manufactured to form part
and portion of new stoves the plate then if preferred forming the back and top of
such stove whereby its value is enhanced such stoves not being liable to get out of
repair and greatly enhances thier utility and value.
By the application of this apparatus an hot air chamber is formed around the
cone and above the plate. The cone and plate become heated and a draught is
thereby created which prevents smoke returning down the chimney or flue and
if any such should return it is arrested by the heated plate and the heated cone
and plate and both creates an updraught which carries away all smoke which
would otherwise return through the stove into the room or place where the coal
or fuel is being burnt. The top of the cone being of such a reduced diameter
rendering down draught impossible. It increases the drawing power of the
chimney or flue and thereby increases ventilation while retaining and increasing
the warmth of the room or place.
Its application does away with the necessity for the use of unsightly and at all
times dangerous cowls windguards tall pots fixed on chimney stacks.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is performed applied and carried into
practice I declare that what I claim is:-
The combination of a plate and movable cone substantially as herein before
described which can be manufactured and made in wrought or cast iron copper
zinc or other suitable metal for the purposes herein before described, and
mentioned.
Dated this 21st day of Feb 1800