Year: 1897

page_text: I, JOHN JAMES CRESSWELL, of 77, Victoria Street, Grimsby, Architect and Surveyor,
do hereby declare the nature of this invention to be as follows:-
The inward current of air by which it is intended to ventilate the apartment and
which may be produced by any suitable means is led along a channel A in the
direction shewn by the arrows in Figs. and 2, which are respectively section and
plan of the ventilator. The channel A opens into another channel B of cylindrical
section at or about right angles to A, not in a line with the axis of B but to one side
of it at or near a tangent to the cylinder as shewn on the drawing Fig. 2 with the
object of causing a rotatory forward motion to the column of air in B. A cylindrical
shutter C fitting inside the channel B and revolving on its axis has an opening
corresponding with the opening between A and B and is actuated by suitable external
means to regulate or cut off the incoming air by causing the solid part of the shutter
to close the passage between A & B in any required degree. The cylindrical
channel B may be contracted at the mouth to increase the velocity of the current at
the point of discharge into the apartment, and it may open upward or downward or
in any desired direction. It may also be inclined forward into the apartment,
standing at an obtuse angle with the inlet channel A, as shewn by dotted lines in
Fig. 1. Further the said channel B may be left open at both ends,
JOHN J. CRESSWELL.
I, JOHN JAMES CRESSWELL, of 77, Victoria Street, Grimsby, Architect and Surveyor,
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:-
I desire to adopt the drawings accompanying my provisional specification as the
drawings for this specification. These drawings are to be understood as illustrating
a form of my invention in which the inlet A of the air supply is approximately
horizontal, and the outlet to the apartment, B, is at or near the vertical, and the
description herein following applies to such a position and arrangement of the two
channels; but other positions and arrangements may be adapted to the same
principle as is hereinafter mentioned.
Figure 1 on the said drawings is a vertical section of the ventilator parallel with
the direction of the incoming current of air: and in this and Figure 2 the shaded

page_text: parts shew the wall into which the ventilator may be fixed, the arrows shewing the
direction of the incoming current of air. Figure 2 is a plan or horizontal section or
the ventilator. Figure 3 is a repetition of a portion of Figure 2, with a valve of
shutter C partially closed.
The current of air to be introduced into any apartment for the purpose of
ventilation, which current may be produced or induced by any suitable means, as by
pressure from without, exhaustion within, or in any other way, is conducted by a
channel A in the direction shewn by the arrows in Figures I and 2. The channel A
at its junction with the. channel B as hereinafter mentioned must be of some width
less than the diameter of B, preferably less than one-half of the said diameter: its
height should be such as to keep its cross section of equal area throughout its length:
for example, the drawings shew its height towards B increased on account of its
width in the same direction being decreased. It would however not be objectionable
were the said cross-section to he gradually somewhat diminished up to the point of
junction with B, with a view of increasing the velocity of the air-current.
The channel A opens into another channel B, preferably cylindrical or conical, with
its axis at right angles to A or.canted forward as shewn by dotted lines in Figure 1.
The channel A at its junction with B is not central with B, but to one side of it, and
one side of the channel A should be tangential to one side of the channel B, as
shewn on the plan, Figure 2: The object of this tangential or oblique junction is
to cause a rotatory motion to the stream of air in its passage through B, as shewn by
arrows.
The ingress of air may be controlled by any suitable arrangement, that which I
prefer is shewn in Figures 2 and 3. It is a shutter C fitting inside the cylindrical
or conical channel B and capable of being revolved therein on their common axis,
and having an opening corresponding with the opening between A and B. This
shutter being so revolved opens or closes the passage between A and B in any
required degree: Figure 3 shews the said passage about half-closed.
The channel B may be contracted (as is shewn) at its mouth, or expanded, it may
open upward, downward, or in any direction, or in more than one direction, as by
being branched or open at both ends, and it may be fixed against a wall as shewn, or
in any other position.
:.
Such ventilators as are above described may be used for supplying air of the ordinary
temperature, or warmed or cooled to any degree.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the saine is to be performed, I declare that what I
claim is :-
The construction of inlet ventilators having an air channel or conduit divided in
two portions, joining each other at an angle, and from the first of which portions the
air enters the second tangentially or to one side of the axis of the second portion, so
as to cause a rotatory motion of the air in the second portion before such air is
discharged from the ventilators, as shewn in the drawings above referred to, or in any
similar manner.
Dated this 10th day of T1000