PREVENTING DESCENDING DRAUGHTS IN CHIMNEYS
Year: 1884

page_text: I, WILLIAM MORRISON of 2 John Street Terrace New Swindon in the County of
Wilts, Smith, do hereby declare the nature of my invention for PREVENTING
DESCENDING DRAUGHTS IN CHIMNEYS to be as follows:-
An adjusting and double conical valve-consisting of an equal balanced doublo
conical valve apparatus-namely two rods with 12 adjusting holes, also two
sockets with chain and pin holes together with half circular weighted conical
capes with appendages constituting a complete ventilating chimney top as herein.
after described.
The adjusting and double conical valve Chimney Top for ventilating chimneys
by resisting the atmospheric pressure of wind and readily causing suction by the
assistance of automatic appliances the Invention of William Morrison, Smith, of
John Street Terrace, New Swindon in the County of Wilts.
What I claim for my improvement in chimney tops is in the adjusting double
conical valve chimney top appliances which consists in an equal balance double
conical valve apparatus namely two rods with twelvo adjusting holes at the bottom
and the valve appendages at the top of the adjusting rods. The rods to be placed
in two adjusting sockets in a direct line opposite each other, so arranged as the
valve can be raised or lowered twelve inches or set according to the holes to suit
the chimney. The appendages connected with the double conical valve being
arranged by means of an oblong or shackle shaped link and small crank lever to
the top of the adjusting rods.
This lever is so arranged to have a circular weighted half conical cape, by the
use of this weighted cape the equilibrium takes place on the middle floating conical
double valve preventing the wind blowing in a downward direction.
The Improved Chimney Top in its construction is of Gothic design.
The uptake for clearing the smoke out of the chimney or flue consists of four
vertical ventiducts placed around the funnel or uptake and also four vertical veins
or tubes inserted in the centre of ventiducts and so constructed as to come into
direct contact with the conical double floating valve inserted in the uptake, which
baffles the atmospheric pressure and hence the desired effect of assisting the under-
draft in clearing the smoke out of the chimney. On account of the lower region of
air being more heated and so more rarefied than the upper and in consequence
specifically lighter & hence it is I employ the half circular weighted cape or
Vandyke double cones to assist the equilibrium balance on floating valve,

page_text: To resist the atmospheric pressure or any sudden gusts of wind from any quarter
at the time may be blowing it must be understood that the ventiducts being
placed opposite one another with the assistance of the veins draws the smoke out
of the chimney and renders it impossible for the smoke to return as is shewn by the
accompanying drawings, they being alphabetically & figuratively arranged for
example.
Fig 1. is an outside elevation of the chimney top.
Fig 2. is a top plan. Fig 3. is a section taken just above top of conical uptake C.
Fig 4. is a vertical section through the centre.
Fig 5. is a bottom plan of conical uptake C shewing square base. In all these
views the same letters refer to same parts as follows:-
A. Represents half circular weighted cape or cone shaped weight.
B. Represents an equal balance Vandyke double conical valve.
C. Represents conical uptake with the B equal balance double valve causing
double valve to lower three or four inches and the half circular weighted cape to
rise three or four inches according to pressure of wind. The smoke that comes
out of the conical uptake is forced through vein and ventiduct hereinafter
described.
D. Represents the two adjusting rods shewing twelve holes one inch apart and
each rod connected to the equal balance double conical valve & half circular cape-
if necessary the valves can be raised from one to twelve inches or vice versa to
suit the chimney either way.
E. Represents two sockets for the adjusting rods to rest in.
F. Represents pin & chain passing through socket holes.
G. Represents corrugated holes placed around the extreme edge of the equal
balance double cone.
H. Represents tube inserted in the above to cause suction out of the conical
uptake.
I. Represents rod with hook on each end passing through the B balance double
cone,
J. Represents small crank lever connected to the half circular weighted cape.
K. Represents an oblong or shackle shaped link, so arranged as to connect the
half circular weighted cape to the B double cone or valve, thus causing the B double
cone to be in continual motion when the wind is blowing.
L. Represents four ventiducts rivetted on conical uptake.
M. Represents four vertical veins inserted between ventiduets wind striking
on cape marked A would rebound on equal balance cone and would descend
ventiducts LL LL.
The four veins inserted between ventiducts L L L L are to restore the equilibrium
for air that is cool and dense will force the warm and rarefied air in a continual
stream upwards out of veins M M M M and so cause a continual circulation.
Having now described the particulars of the said Invention I claim for improve-
ments in ventilating chimney tops constituting couical double valve, adjusting rods
with pin holes & half circular weighted conical appendages as herein specified and
shewn by the drawings.

page_text: WILLIAM MORRISON Smith 2 John St Terrace New Swindon, Wilts, I do hereby
declare the nature of my invention for PREVENTING DOWN DRAUGHTS IN CITIMNEYS
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:―
In accompanying drawing Fig 1 is a vertical section. (2) is a sectional plan on
line X Y. (3) is a plan. 4. is an elevation. A. is a cross piece supporting
double conical valve and connected with B B. The two adjusting rods in each
of which are twelve holes for adjustment. By means of the clipps, C. C. and
pins passing through same. D is the bottom cone of doublo conical valve. E is
the top cone of same. F is a spindle passing through valve the bottom end
of which is screwed to admit of further adjustment. G. is a nut fixed in bottom
cone D. H, is a nut to tighten against underside of cross pieco A. The top end
of spindle F is centrical and works in a cap on bottom of I which is a receptaclo
for holding lubricant for the said centre.
The top cone E is connected with I. by means of a tube surrounding spindle F.
In top of cone E is fixed a washer, which catching against pin passing through F
regulates the lift of cone E on spindle.
"JJ"
2
represents a fan fixed to I which cause the upper cone E to revolve.
K" is the conical uptake, over top of which is a conical cape "L" M. M. M. M.
are four ventiducts rivetted to conical uptake. N. N. N. N. are four veins cach
covering an opening in conical uptake, which thus allows egress of smoke, but
prevents ingress of wind.
"
O is a small scraper fixed to the top cone E" to prevent accumulation of soot
on bottom cone D By means of the holes in the adjusting rods & the pins to pass
through clipps, the double conical valve can be adjusted to regulate the amount of
opening at top of conical uptake.
By these improvements the chimney top can be readily adapted to each particular
case and thus retains its efliciency under the most difficult circumstances. The
openings inside the four veins N. N. N. N. always allow the escape of smoke
blown down by sudden puffs of wind, whilst the construction of conical uptake
and its appendages prevent such wind passing down chimney.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1st The powers of adjustment to suit varying circumstances.
2nd The prevention of down draughts in the chimney,