IMPROVEMENTS IN VENTILATORS AND CHIMNEY COWLS
Year: 1882

page_text: LETTERS PATENT to John Marson Lamb, of 119, Finchley Road, South
Hampstead, Ironmonger, for an Invention of “IMPROVEMENTS IN VENTILATORS
AND CHIMNEY COWLS,"
PROVISIONAL SPECIFICATION left by the said John Marson Lamb at the
Office of the Commissioners of Patents on the 18th February 1882.
JOHN MARSON LAMB of 119 Finchley Road South Hampstead Ironmonger.
IMPROVEMENTS IN VENTILATORS AND CHIMNEY COWLS.
This Invention consists in having the wind vanes Fixed on and Between one or
more cones riseing one above the other in the form of a venetian Blind, The
number of cones being regulated according to the size and power of ventilator
required, revolving by the action of the wind over a fixed cone on which I fix
guides at the same angle as the wind vanes to conduct the wind in the same way
the head revolves. I also leave the fixed cone top wider so as to overlap its
supporting piece, and thereby I obtain more wind surface and consequentially
greater power over the cones mouth. The wind vanes I make much wider than
Hithertoo in use to correspond with the revolving cones on which they are fixed.
The whole are covered with a cone or other shaped hood to suit Architectural
purposes and supported on base with iron stays. The Cones and vanes are mounted
on an ordinary spindle in top and bottom oil boxes. It will be seen from the
construction of the extra wide wind vanes fixed at convenient angle on the cones,
that as the wind propelles the head it rises over the cone or Cones between the
several vanes it takes the form of a compound screw and also creates the same
action over the fixed cone and thereby causes an intense updraught. I also add
the archimeadean or other screw to the spindle to assist the action where a greater
extraction of air is required. When making these as Cowls for chimney I prefer
to leave the head clear and therefore mount the oil box and spindle under
the hood and on the outside of which I fix wind vanes to quicken its revolving
power,

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Marson Lamb in the Great Seal Patent Office on the
5th August 1882.
JOHN MARSON LAMB. of 119 Finchley Road South Hampstead in the County of
Middlesex, Ironmonger. IMPROVEMENTS IN VENTILATORS AND CHIMNEY COWLS.
This invention consists in having the wind vanes fixed on and between one or
more cones riseing one above the other in the form of a venetian blind.
The number of cones being regulated according to the size and power of ventilator
required, revolving by the action of the wind over a fixed cone on which I fix
guides at the same angle as the wind vanes to conduct the wind in the same way
the head revolves, I also leave the fixed cone top wider so as to overlap its
supporting piece and thereby I obtain more wind surface and consequently greater
power over the cones mouth. The wind vanes I make much wider than hithertoo
in use to correspond with the revolving cones on which they are fixed. The whole
are covered with a cone or other shaped hood to suit Architectural purposes and
supported on base with iron stays. The cones and vanes are mounted on an
ordinary spindle working in top and bottom oil boxes. It will be seen from the
construction of the extra wide wind vanes fixed at convenient angle on the cones.
That as the wind propells the head it rises over the cone or cones between the
several vanes it takes the form of a compound screw and also creates the same
action over the fixed cone and thereby causes an intense updraught. I also add
the archimedean or other screw to the spindle to assist the action where a greater
extraction of air is required. When making these as cowls for chimneys I prefer
to leave the head clear and therefore mount the oil box and spindle under the hood
and on the outside of which 1 fix wind vanes to quicken its revolving power.
The accompaning drawing will serve to more fully explain my said Invention.
The various parts are made of metal or metal and wood or Earthenware combined
or any other suitable material.
Fig 1. is an elevation of ventilator with fixed hood M supported by stays N, on
fixed cone A between which the revolving cones D are propelled by the wind
acting on the vanes E the revolving cones are attached to a long spindle working
in top and bottom oil boxes as shewn in Fig. 7.
Fig 2, is an elevation of Cowl or ventilator working in only one oil box fitted
under head as in Fig 4, F wind vanes fixed on head for extra speed.
Fig 3, is also an elevation of chimney cowl or ventilator made with only one
revolving cone D.
Fig 4, refers to the base and fixed exhaust cone with overlapping top A and the
wind guides B, the dotted lines J. shew the extent of vacium chamber on which
the extra wide cone A forms the top to carry guides B, C the protection plate
fitted on the bridge and under oil box and fitting inside hollow head of revolving
cowl Fig 5.
Fig 6, is an elevation of ventilator for ships, here I attach guard cones G, under
riseing cones D and baffle plates to prevent the water from being driven inside the
ventilator. I also make a water joint in two seperate pieces S and T, which
collect all spray and condensation that may accumulate inside and overflow to
the outside and it also allows the ventilator to be seperated from the base by
releasing the screws V
Fig 7 is a sectional plan of ships ventilator, W shaft on which fixed cone A
is fixed over vacium chamber J, M Hood, N stays, H spindle to which revolving
cones D, and guard cones G are fixed, E wind vanes fitted between cones, K

page_text: baffle plates attached to top of riseing cones D, and also under the hood, O
Archimedean or other screw for increased extracting power, S top half of water
joint rivited or otherwise fixed on shaft W, at sufficient height to make water joint
in cup of bottom casting T on which several projections U, are either fixed or cast
in one piece to carry fixing screws V.
Fig 8, is a sectional plan of ships ventilator constructed for conveying the air
downward the external construction being the same as Fig 6, with the exception
that the guides are not necessary on the fixed cone, and the wind vanes E are fixed
at a partially different angle. In the place of circular baffle plates K. I fix funnel
shape pieces P, the wide part at the top serving the purpose of baffle plates and the
narrow part at the bottom, The wind vanes E are continued down the outside of
funnel pieces to form wind channels, It will be seen that when the wind rises
over cones D, and under guard cones G it impinges against the outside of funnels P
and Q and then descends through the various channels into the shaft, I can also
make the funnel pieces longer as they rise to the top so that all shall finish level
at the bottom, I also can leave out the spindle and make the body of ventilator
a fixture, But I prefer to make it a revolving ventilator on spindle as thereby I
get a greater delivery of air. The pieces marked Q are in all cases made fixtures,
R is a small tube for filling water joint.
Fig. 9. is a modification of chimney cowl Fig 2. The base, fixed cone, bridge,
oil box, and protection plate, are left completo as in Fig 4. The revolving cones D
are made to go only half way round. supported by wind vanes E and on the
hood M. I fix only one wind vane ✗ which always conducts the half cones to
windward and so supplies a powerful current of wind over the mouth of fixed
cone. The wind guides B. can be used on cones instead of the centre vane E.
Having thus described the nature of my said invention and the manner of
performing the same, I declare that what I claim as my invention secured to mo
by the herin-before in part recited Letters Patent is
First. Revolving cone or cones riseing ono above the other with corresponding
wide wind vanes attached and all revolving over a fixed cone exhaust chainber on
which I place wind guides as herin-before described
Second. Revolving cones and wind vanes with water guard cones and baffle
plates attached for the purpose as herin-before described.
Third, Guarded cones with internal funnel shaped pieces attached theretoo for
the wind to impinge against and descend as herin-before described
Fourth, A water joint for above ventilators when applied to ships made into two
seperate parts and attached to shaft as herin-before described
Fifth. The segment chimney cowl with cones and guides revolving over a fixed
cone exhaust chamber as herin-before described with reference to Fig 9. of the
annexed drawing.
In witness whereof I the said John Marson Lamb have hereunto set my hand
J. M. LAMB. (L.S.)