Improvements in Chimney Tops, Pots, and Ventilators.
Year: 1894

page_text: Date of Application, 3rd Mar., 1894
Complete Specification Left. 3rd Dec.. 1894-Accepted. 5th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Chimney Tops, Pots, and Ventilators.
+
We, GEORGE HOUSDEN, of 1, Warlborough Road, Wood Green, Engineer, and
FREDERICK JAMES PATEMAN, of 82, Woodstock Road, Finsbury Park, School
Board Inspector, both of Middlesex, do hereby declare the nature of this invention
to be as follows:-
Our invention relates to improvements in the construction of chimney tops, pots,
or ventilators for preventing downdraught, and increasing the updraught of
chimneys as a cure for smoky chimneys: or our invention may be applied by a
slight modification in construction thereof as a ventilator for carrying off vitiated
air or dangerous gases from upcast shafts or stackpipes: and from the roofs of
rooms and buildings.
In carrying out our invention we construct the said chimney top, pot, or
ventilator of any suitable metal or other substance. It is circular in cross section,
and when used as a chimney top or pot would be provided at its lower end--which
might be rectangular-with an outer flange for embedding same in brick-work of
the chimney in the usual way: but when intended to be used as a cowl or tall-boy
for attachment to existing chimney tops: if these be rectangular in cross section
the lower end of our said apparatus would be constructed rectangular also, or
otherwise, according to the shape of the said existing chimney top: so that our
said pot or top may be fitted therein or thereon. In this case the flange at the
lower end would not exist.
The upper part, or head of our said invention is constructed of four truncated
cones, larger in diameter than the cylinder forming the base-and so joined
together as to practically form two heads in continuity, each pair of truncated
cones forming a head. In the space on the outside-formed by the junction of the
two heads before mentioned we place a number of mouths or trumpets so arranged
as to catch the passing current of air.
The air thus intercepted is conducted into the upper part of head: and passing
through a tube in an upward direction causes a strong up-draught, thereby facili-
tating the egress of smoke and becoming a cure for smoky chimneys.
To prevent down-draught we place immediately over the mouth of the said
chimney top, pot, or ventilator: but at a short distance from it, a cone or cones,
secured to head by suitable-stays. To prevent a side-wind entering mouth of said
pot we construct a false top or head, having its greatest diameter at bottom.
If a body of air is forced in at false top or head instead of passing down the vent
it is split up by the cones or diaphragm, deflected over the real head, or top, and
passes out at opening at foot of false head or top.
In its passage it assists the up-draught.
Should our invention be used as a ventilator to be attached to roofs of rooms or
buildings, the flange on the lower end may be extended in width beneath the slates
or tiles to maintain a weather proof connection.
Dated this Third day of March 1004
GEORGE HOUSDEN.
FREDERICK JAMES PATEman.

page_text: COMPLETE SPECIFICATION.
Improvements in Chimney Tops, Pots, and Ventilators.
We, GEORGE HOUSDEN, of 1 Warlborough Road, Wood Green, Engineer, and
FREDERICK JAMES PATEMAN, of 32 Woodstock Road, Finsbury Park, School
Board Inspector, both in the County of Middlesex, 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.:-
Our invention relates to improvements in the construction of chimney tops, pots,
and ventilators, for preventing down-draught, and increasing up-draught as a cure
for smoky chimneys, or as a means for carrying off vitiated air and dangerous
gases from the upcast shafts or stack pipes of sewers and the like, or for, effecting
perfect ventilation of rooms, and buildings.
In order that our invention may be fully and clearly understood, we have
hereunto appended a sheet of drawings, in which
Figs. 1 and 2 are elevation and vertical section respectfully of our improved
chimney top, pot or ventilator, according to one method. we employ in the
construction of same.
Fig. 3 is a cross section of Fig. 1 upon the line A B, while Fig. 4 is a like
section of same upon the line C D.
Fig. 5 is an elevation partly in section of, an alternative method we employ of
constructing our said invention.
Fig. 6 is a diagram illustrating a section of a portion of Figs. 1,2 or 5 as herein-
after explained.
In carrying our invention into effect, we construct of metal, of any suitable
description, or earthern, stone or other similar ware, or any material or substance
adaptable therefor, a tubular portion A, which may be circular, polygonal or
rectangular in cross section, according to the purposes to which our invention may
be applied, that is to say, if our invention is to be employed as a chimney top or
pot, the said portion A would form the lower end or base of same, and may be
circular or rectangular in cross section, and may be provided with a suitable flange
for embedding in the brick, stone or other work of the chimney, in the usual way,
but if intended to be used as a cowl or tall-boy, or as a cowl for attaching to
existing tall-boys or chimney tops, the portion A would be of such shape in cross
section as to render it most adaptable for such attachment, so as to fit truly therein
or thereon, in which case the before mentioned flange on A may be omitted if
desirable.
The upper part or head of our said invention consists of four truncated
cones B, C, D and E, which may be of the same material as that of A, or any
other adaptable for the purpose, and preferably of larger diameter than A, and
these we firmly connect together in pairs base to base, the two pairs thus formed
being connected together in like manner, so as form two double coned heads in
continuity, which are eventually firmly fixed to and upon the upper end of the
portion A, by any suitable means.
AV shaped annular recess is thereby formed upon the outer surface of the said
upper part, by the junction of C and D, and this we partly enclose by a suitable
number of plates F, preferably three, of such a length, that when fixed firmly to
the junction edges of B C and D E, at an equal distance apart, the space that
exists between any two of these form an entrance into the said V shaped annular
recess. One end of each plate F, is so formed, that when, bent inwardly at a
suitable angle, and firmly connected to C and D, form partitions in the said
V shaped recess; and destroy the continuity of same, such return or bent ends
being shewn by G in Fig. 3. The opposite end of each plate F is bent or curved
outwardly as shewn by H at Fig. 3, and these in conjunction with the portions G
form trumpet shaped mouths, which are intended to catch the passing current of

page_text: air, and by means of suitable holes formed in the cone D, each of which is covered
by a tube J, placed at suitable angles and pointing in an upward direction, the air
thus intercepted by G H, passes through the said tubes J and out at the top of the
cone E, thus forming a strong updraught, and thereby facilitating the egress of
smoke, and so constitutes a cure for smoky chimneys, or perfect ventilator for the
escape of foul air or gases. The position of the said tubes J is further illustrated
by the diagram Fig. 6.
To prevent the possibility of down-draught, we place immediately over the
mouth of E, a cone or cones such as K, which may be secured to E by stays, such
as L, or by any other convenient means.
We may find it convenient or expedient to provide a means for guarding against
the possibility of side winds, or currents of air deflected from adjacent roofs or
other slopes, from entering into the mouth of E, and so causing down-draught, and
we effect this by providing a hood, head or bonnet such as M in Fig. 5, which may
be fixed to and upon E, by the use of like stays L, or by any other suitable means.
When the said hood or bonnet M is used we prefer to suspend the canopy K
thereto by the means of chains, rods, wires or their equivalents N, as shewn in
Fig. 5, so that should a current of air force itself into the top of M, this instead of
passing down into E, would be split up by the cone shaped canopy or
diaphragm K, and be thereby deflected outside the head E and pass down and out
at the foot of M, and would in its passage materially assist updraught through A
and E.
When our said invention is used as a ventilator attached to the roofs of rooms or
buildings, the before mentioned flange on the lower end or other convenient part
of the portion A, may be extended in width indefinitely, so as to pass beneath the
slates, tiles or other covering of the roof, to maintain a weather proof connection
therewith.
Having now particularly described and ascertained the nature of our said inveu-
tion and in what manner the same is to be performed, we declare that what we
claim is.
1st. In the construction of chimney tops, pots or cowls for curing smoky
chimneys, and ventilators for attachment to upcast shafts or stack pipes, or the
roofs of rooms or buildings, the use and application of the herein described
apparatus, and the several parts constituting the same, connected and operating.
substantially as and for the purposes herein set forth and shewn.
2nd. In the construction of chimney tops, pots, cowls or ventilators, the combi-
nation of a tube A, surmounted by a head composed of truncated cones B, C, D, E,
provided with any number of enclosing plates F, forming air inlets H G, communi-
cating by passages and tubes J, with and into the cone E, surmounted by and
carrying a coned shaped canopy K, the whole connected and operating substan-
tially as and for the purposes herein described and shewn by the accompanying
drawings.
3rd. In the construction of chimney tops, pots, cowls and ventilators, the combi-
nation of a tube A, surmounted by and fixed to a head composed of truncated
cones B, C, D, E, provided with any number of plates F. forming air inlets H G,
communicating by passages and tubes J with, and into the mouth E, surrounded by
and fixed to hood or bonnet M, holding in suspension a cone shaped canopy or
diaphragm K, above and over the mouth of E, substantially as and for the purposes
herein described and shewn by the appended drawings.
Dated this 3rd day of December 1894.
GEO. THOS. HYDE,
1, Broad Street Buildings, Liverpool Street, London, E.C.,
Agent for the Applicants.