IMPROVEMENTS IN FANS
Year: 1884

page_text: I, JOHN MARSON LAMB of 119 Finchley Road South Hampstead in the County
of Middlesex Engineer do hereby declare the nature of my said invention for
IMPROVEMENTS IN FANS to be as follows :-
This Invention consists in the construction of Fans with one or more Revolveing
cones working within a fixed cone of much larger diameter and of loss length,
The inner cone which revolves by power I fit up with two or more Tapered shaped
blades on the twist, so as to form a partial screw round the axle, The largest end
being attached to the axle at the discharge end, and the small end to the mouth of
the cone, On the outside of this cone I fix two or more bands of metal in the
screw form, starting in a line with the mouth of the fixed cone, and continucing to
the end of the cone, This cone is mounted horizontally on an axle with a driving
wheel at one end and supported in bearings at both ends. The outer or fixed cono
I make of stout metal with a short straight cylinder attached to the discharge end
which carries the bridge and bearings for one end of the revolveing cone's axle and
on the outside of this cylinder two or more screwed stay bars are fixed which
connect by means of nuts to the front bearings. On the inner side of this fixed
cone also fix two or more bands of metal in the screw form. Only in opposite
These
directions to the metal bands fixed on the outside of the revolveing conc.
metal bands are only of sufficient depth so that when the revolveing cone is in
motion they are clear of one another, It will be seen from the construction of
these conical tubes or cones, that the small end is the receiveing point and the large
And when
end the discharge point, both in the revolveing and in the fixed cone,
the revolveing cone is in motion the blades that are fixed inside draw a large
volume of air rapidly through the small end and discharge it at the largest end
centrifugally. While the metal bands forming the screw on the outside of the
revolveing cone revolve against the opposite formed screw on the inside of the fixed
cone draw in a circular volume of air between the outside of tho revolveing cone
and the inside of the fixed cone and discharge it at the opposite end with the inner
current into the Exit tube, I also Gx on the edge of the revolveing cone a circular
plate slightley cuped inwards. To seperate the air passage between the revolveing
and the fixed conc, When a still greater amount of air is required to pass through
the mouth of the revolveing cone, I fix this plate nearer to the fixed conc and cut

page_text: openings from the edge up to the plate opposite the internal blades and fix
collecting cups over them, When two or more revolveing cones are used the small
end of one enters about half way through the large end of the other and the first
cone has a much larger receiving orifice than the inner one but the discharge of all
are conveyed into the outer fixed cone as in the Single Cone Fan I can also use
other shaped blades within the revolveing cone besides those of the screw form and
I can dispense with the use of the reverse screw band in the inside of the fixed cone
but I prefer to use the opposite screw in the fixed cone as thereby. I get much
greater and a more rapid discharge of air through the Fan.

page_text: I, JOHN MARSON LAMB of 119, Finchley Road South Hampstead in the County
of Middlesex Engineer, do hereby declare the nature of my said invention for
IMPROVEMENTS IN FANS and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
'This Invention consists in the Construction of Fans. with one or more revolving
cones working within a fixed cone of much larger diameter and of less length.
The inner cone which revolves by power I fit up with two or more tapered shaped
blades on the twist so as to form a partial screw round the axle. the largest end
being attached to the axle at the discharge end and the small end to the mouth of
the cono.
On the outside of this cone I fix two or more bands of metal in the
screw form either starting in a line with or below the mouth of the fixed cone and
continuing to the end of the cone This cone is mounted horizontally on an axlo
with a Driving wheel at one end and supported in bearings at Both ends. The
outer or fixed cone I make of stout metal with a short straight cylinder attached
to the discharge end which carries the bridge and bearings for one end of the
revolving cone's axle and on the outside of this cylinder two or more screwed stay
bars are fixed by means of nuts to the front bearings. On the inner side of this
fixed cone I also fix two or more bands of metal in the screw form only in opposito
directions to the metal bands fixed on the outside of the revolving cone. These
metal bands are only of sufficient depth so that when the revolving cone is in
motion they are clear of one another. It will be seen from the construction of
these conical tubes or cones that the small end is the receiving point and the large
end the discharge point both in the revolving and in the fixed cone and when the
revolving cone is in motion the blades that are fixed inside draw a large volume of
air rapidly through the small end and discharge it at the largest end centrifugally.
While the metal bands forming the screw on the outside of the revolving cone
Revolves against the opposite formed screw on the inside of the fixed cone draw
in a circular Volume of air between the outside of the revolving cone and the inside
of the fixed cone, and discharge it at the opposite end with the inner current into
the exit tube. I also fix on the edge of the revolving cone a circular or cuped
plate. To seperate the Air Passage between the revolving cone and the fixed conc.
When a still greater amount of air is required to pass through the mouth of the
revolving cone I fix this plate nearer to the fixed conc and cut openings from the
edge up to the plate opposite the internal blades and fix collecting cups over them.
When two or more revolving cones are used the small end of one enters about half
way through the large end of the other and the first cone has a much larger receiving
oritice than the inner one, but the discharge of all are conveyed into the outer fixed
cone as in the single cone fan. I can also use other shaped blades within the
revolving cone besides those of the screw form and I can dispense with the use of
the reverse screw bands in the inside of the fixed cone-but I prefer to use these
opposite screw Bands in the fixed cone, as thereby I get a much greater and a more
rapid discharge of air through the Fan.
The accompaning drawing will serve to more fully explain the nature of my said
invention. Fig 1. is an elevation of Fan with one revolving cone or conical
cylinder for driving large volumes of air with two receiving chambers the one being
within the revolving conical cylinder A, while the second chamber is within the
fixed conical cylinder B, and the discharge through the short connecting cylinder J,
which has one bearing frame H fixed inside it and the opposite bearing frame H is
held in position by means of the screwed stay bars K, The screw Blades C are

page_text: fixed inside conical cylinder A and attached to axle D, E the outside blades on
evolving body. L the radial screw blades fixed inside conical cylinder B in
opposite directions to blades E. M. cuped or flange piece at mouth of cone A
G driving wheel which can be fixed at either end of fan to suit requirements.
N. lug on bearing frame for the attachment of discharge or feeding tube. Fig 2,
End View of Fan shewing position of the several radial blades L against tho
revolving blades E. I do not bind myself to any one given depth of either
blades E or L as they may be varied for different purposes Fig 3. This shows a
short cylinder for applying the force to seperate blasts. R circular plate containing
the short tubes S, P the outside cylinder for bolting to lugs N, Q the inverted
connecting conc. by this means the blast can be carried in various directions without
a main pipe and all receiving equal pressure Fig 4 is a section of Blast end shewn
in Fig 3 shewing the wind passage by indicating arrows. Fig 5. shews tho
revolving conical cylinder of Fig 1 and Fig 2. with a tapered boxing F on axle
which directs all dust &c from the bearings at the discharge end. the blades E can
be made of various lengths from the discharge end to the mouth of fixed conical
cylinder or flange M and of any number or desired curve according to the purpose
required or engine power at disposal.
Fig 6 shews the revolving conical cylinder as in Fig 5 with holes pierced through
it to create a more rapid discharge of air through the conical cylinder, which takes
place by induction through the rush of air over its outer surface. I can also
construct these fans on the same basis with straight cylinders, but I prefer to
construct them as described in the conical form as thereby I get a quicker and
better delivery with less expenditure of power.
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 as my invention secured to me 'by the herein-before in part recited Letters
Patent is
First A revolving conical shaped cylider containing a fixed screw blade or blades
which are fixed on the axis and on their outer edge to the inside of revolving
cylinder which cylinder again forms as it where a secondary axis for the fixing of
the outer revolving screw-blades as herein-before described.
Second. The outer fixed conical cylinder with the reverse fixed blades inside in
conjunction with the revolving conical cylinder as herein-before described.
Third. The Discharge end when applied to Volume Fans as herein-before
described in reference to Fig 3 and Fig 4. of the annexed drawing.
Dated this Seventh day of October LSS1