Improvements in Revolving Ventilators and Chimney Cowls.
Year: 1891

page_text: Date of Application, 17th Feb,, 1891
Complete Specification Left, 15th Apr., 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Revolving Ventilators and Chimney Cowls.
WALTER JOHN WILLIAM WHEELER 57 Ladbroke Road Notting Hill Gate, W.
Builder do hereby declare the nature of this invention to be as follows:-
Improvements in the shape of the outer wind fans or blades.
Instead of the top or hood covering the top of the said fans or blades, I arrange
them that the fans or blades are outside the top or hood, and are so shaped that the
fans or blades revolve outside instead of inside the top or hood, the object being
that the wind shall be prevented from entering the interior of cowl or ventilator.
The said wind blades or fans can be fixed either vertically or diagonally.
The base of the said fans or blades, are fixed or joined to a section or frustrum
of a cone, a portion of which frustrum projects inwards or inside the wind fans,
thus effectually checking the entrance of wind. into the interior of the cowl or
ventilator.
This invention relates more especially to a new air propeller, or exhaust fan, and
is so arranged in two chambers that when revolving one chamber is filling and the
other exhausting the smoke or vitiated air from chimney flue or shaft.
This exhaust apparatus can best be described by stating that it is a conic section
at right angles.
For instance, a cylinder of 12" diameter and 12" deep is cut into two parts
diametrically, and the depth divided into three, which would be 4"; from the top
of cylinder to the base in the semi-circle, draw a slanting line which divides the
half cylinder into two parts. From the second point from top of cylinder, draw
another slanting line to the vanishing point in the base, which will be the exterior
lining or outside shield of the fan. On this section of the half cylinder 4" in the
direction of its axis, cover it, making a joint along the conic section before
described until it again reaches the vanishing point in the base, and then fill in the
inner space intersecting on the spindle spirally.
The two chambers are joined and fixed to a spindle of sufficient length to allow
the internal fan to be buried a proper depth in a cylinder or tube; the spindle
working in suitable bearings.
The frustrum or section of cone supporting wind blades is adjusted a certain
distance from top of cylinder, to allow an up current into the interior of the wind
blades or fans. The whole, when revolving, causes a powerful up draught or
suction.
Another feature in this invention, is, that by reversing the revolutions of
the internal fan, it can be used for propelling fresh air into rooms &c.
It is further to be noted that the area of cylinder or base in which the internal
fan is confined is much greater than the area of chimney flue or air shaft, the result
being that the apparatus is veritably a powerful air pump.
The area of cone or frustrum of cone projecting into wind fans is equal to area
of chimney flue or air shaft.
Provision is made for lubricating the top and lower centres.
Dated this Seventeenth day of February 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Revolving Ventilators and Chimney Cowls.
I WALTER JOHN WILLIAM WHEELER, Builder, No. 57 Ladbroke Road,
Notting Hill, 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 :-
My invention relates to ventilators and other cowls and is designed for the
improvement & construction of the same.
An important feature of my said invention consists in the combination with
outer wind fans of a new shaped air propeller or exhaust fan arranged for the
purpose of drawing upwards and exhausting the smoke from chimneys or the foul
air from rooms or the like.
The said exhaust fan or air propeller is further described as having two or more
chambers constructed with outer and inner shields, the said shields being joined or
covered by a curved triangular plate, commencing with a point in the base and
graduating spirally until the proper channel and height of the fan is attained.
Two or more chambers thus formed are joined at the base as shewn in the
drawings.
Another important feature in my said invention relates to the shape of the wind
fans at the top, which are shaped as on drawings the object being that violent
currents of wind shall pass through the openings therefore reducing to a minimum
the possibility of the wind entering the interior and causing down draught.
Another novel feature in my said invention is a standard or pillar, which is fixed
in the exhaust fan chamber by a cross bar supporting the standard or pillar.
Upon the top of the said standard or pillar I fix by screwing on or otherwise an
oil chamber with guides or bearings to keep the spindle in a vertical position.
The spindle is drilled from the top, a sufficient depth inside the oil chamber and
at that point a horizontal hole is made in order to supply oil without taking the
cowl off.
In the accompanying drawings I have shewn how my invention may be carried
into practice.
Fig. I is an elevation partly in section shewing my improved ventilator or cowl.
Fig. 1 is another elevation shewing the ventilator or cowl with exhaust fan
suspended to the frustrum of cone on which the wind fans are built.
The said exhaust fan is suspended to the said frustrum of cone by rods, but other
methods may be used.
Fig. III indicates standard or pillar with oil chamber fixed thereon and the
method of securing the supports or cross bar of the standard or pillar to the exhaust
fan chamber.
Fig. IV is a vertical section of oil chamber with the spindle, the said oil chamber
being screwed by preference to the standard or pillar.
Like letters indicate corresponding parts throughout the drawings.
A. is the lower part or tube which is secured to the top of chimney or any
other suitable aperture and connected by a tapered joint to exhaust fan
chamber C.
B. is the exhaust fan suspended by rods or otherwise secured to frustrum of cone
upon which are built the vertical wind fans G. It is necessary to state that the
said wind fans can be built diagonally on the said frustrum of cone instead of
vertically as shewn in Fig. I and II.
The exhaust fan B revolves round the standard D. thus drawing or pumping
smoke or foul air, and dispersing the smoke or foul air through the wind fans G.
F. Fig. IV is the channel drilled in spindle K.
B. B. Fig. V represents outer shield of exhaust fan.
B. C. inner shield of exhaust fan and B A the curved triangular plate which
connects the two shields and thus forms a spiral channel.

page_text: Bis the point of connection in the base of fan.
The diameter of outlet of frustrum of cone c c. and diameter of base A are
equal Figs. I and III.
prefer to make standard or pillar D. Figs. I and III with two or more radial
arms for the purpose of safely securing to fan chamber C. Figs. I and III.
The top of standard can be centered or a centered block in steel or any suitable.
material in lower end of oil chamber as shewn at L. Fig. IV.
The bearings or guides E. E. Fig. IV are preferably constructed of phosphor
bronze.
Letter I shews a casting in any suitable metal to fit the apex of hood of cowl
with a boss tapped for receiving the screw of spindle K Fig. IV.
The spindle K. Fig. IV is constructed of steel and is made of sufficient length
and is regulated by the screw M. Fig. IV so that the centre of gravity of the
whole apparatus can be determined.
N. is a lock nut for clamping spindle K after adjustment is determined.
Q. is a rim or collar cast with block for the purpose of securing finial O and
concealing lock nut N Fig. IV.
H. are wind fans on hood or top of cowl Figs. I. II and IV.
J. is a cap on oil chamber secured by a bayonet joint or screw Fig. IV.
E is a washer or nut on spindle K to prevent the lifting off of the ventilator by
any inordinary means.
The operation of the apparatus is as follows-
The wind acting on the outer fans G. cause the said fans and necessarily the
exhaust fan to rotate in the proper direction, thus acting as a powerful air pump,
and drawing upwards the smoke or foul air, which is effectually dispersed through
the said wind fans G.
It is evident I can modify my invention without departing from the nature of my
invention, for instance I can mount the wind fans and exhaust fan on a shaft or
spindle of sufficient length and securing the said wind fans and exhaust fan
to the said shaft or spindle, the apparatus rotating on two centres as shewn in
Figs. 5. 6. 7.
Fig. 5. is a vertical section shewing two centres R and S.
Fig. 6. is a full size vertical section at R and S. shewing oil chambers which can
be fed without taking the ventilator off (or to pieces) these are important features
in the said invention and are shewn at T and U.
Fig. 7. is an elevation shewing top of ventilator Z without fans for use in
confined spaces such as on board ship etc. etc.
Like letters indicate corresponding parts.
V. are caps to protect the bearings from dust Fig. 6.
W. is a hood to protect the lower bearings from dust Fig. 6.
X. is an oil chamber for top bearing.
Y. is an oil chamber for lower bearing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I wish it understood that I
claim.
First. In a revolving or other cowl or ventilator the combination of outer wind
fans with the exhaust fans substantially and for the purposes set forth.
Second. A ventilating or other cowl in which a standard or pillar is fixed, round
which said standard or pillar rotates an exhaust fan substantially and for the
purposes set forth.
Third. The said standard or pillar in combination with the oil chamber fixed
thereto substantially as described and for the purposes set forth.
גד

page_text: Sixth. The chamber bored through the spindle or adjusting screw for the purpose
set forth and described.
Seventh. The modification of my invention in which it is constructed so as to
rotate on two centres substantially as described.
Eight. The improved ventilator constructed substantially as described and 5
illustrated with reference to Figs. 1. 2. 3. 4. 5. 6. and 7. of accompanying drawings
and operating as and for the purposes specified.
Dated this 17th day of February 1891.
WALTER JOHN WILLIAM WHEELER.