AN IMPROVED VENTILATOR
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Thomas Bauchop at the
Office of the Commissioners of Patents on the 7th November 1883.
THOMAS BAUCHOP of Alloa, in the County of Clackmannan, North Britain,
"AN IMPROVED VENTILATOR"
This Invention, which relates to an improved ventilator applicable for the
ventilation of balls, churches, dwelling-houses, stables and buildings generally,
consists as follows:-A tube leads from the ball or other building to be ventilated
through which the vitiated air passes to the upper part of the ventilator.-Around
the upper or discharge orifice of this tube there is arranged another length of tube
of larger diameter and which may be of parallel diameter throughout its length
but which is by preference made taper with the smallest diameter of the taper
uppermost. Above this length of parallel or taper tube there is arranged another
similar parallel or taper tube which is closed over at the top by a plate.—Between
this plate and the sides of the upper tube as well as between the lower part of the
upper parallel or taper tube and the upper part of the lower parallel or taper tube,
annular openings are formed.-Above the plate covering the top of the upper tube
a conical cap is placed and a cylindrical casing with a conical top surrounding the
said tubes with a space between it and them constitute the entire ventilator.
The action of the improved ventilator is as follows:-The ascending current of
vitiated air on striking against the top plate of the upper parallel or taper tube is
deflected through the annular space and then passes upwards between the upper
conical surfaces of the ventilator and any of the vitiated air which does not escape
by the upper discharge orifice escapes by the annular opening between the upper
and lower parallel or taper tubes.
In the case of a down-blow of wind, the wind passing into the outer space of
the ventilator through the conical annulus at the top is deflected from side to side
between the outer casing and the tubes until striking the bottom of the ventilator
Paine fd1

page_text: when it is reflected upwards and passes through the ventilator in the same manner
as the vitiated air until it finally escapes at the top through which it entered.―
More than two of such superposed tubes may be used.
At the bottom of the outer casing as well as at the bottom of the lower parallel
or taper tube one or more openings are formed for the purpose of allowing the
discharge of rain or water of condensation.
It is to be understood that the improved ventilators may be made circular, square
or polygonal or of other shape in horizontal section.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Bauchop in the Patent Office on the 6th May 1884.
THOMAS BAUCHOP of Alloa, in the County of Clackmannan, North Britain
"AN IMPROVED VENTILATOR
"
My said Invention, which relates to an improved ventilator, applicable for the
ventilation of halls, churches, dwelling-houses, stables and buildings generally,
consists as follows:-A tube leads from the hall or other building to be ventilated
through which the vitiated air passes to the upper part of the ventilator. Around
the upper or discharge orifice of this tube there is arranged another length of tube
of larger diameter and which may be of parallel diameter throughout its length,
but which is by preference mado taper with the smallest diameter of the taper
uppermost. Above this length of parallel or taper tube there is arranged another
similar parallel or taper tube which is closed over at the top by a plate. Between
this plate and the sides of the upper tube as well as between the lower part of the
upper parallel or taper tube and the upper part of the lower parallel or taper tube,
annular openings are formed. Above the plate covering the top of the upper tube
a conical cap is placed and a cylindrical casing with a conical top surrounding the
said tubes with a space between it and them constitute the entire ventilator.
The action of the improved ventilator is as follows:-The ascending current of
vitiated air on striking against the top plate of the upper parallel or taper tube is
deflected through the annular space and then passes upwards between the upper
conical surfaces of the ventilator, and any of the vitiated air which does not escape
by the upper discharge orifice escapes by the annular opening between the upper
and lower parallel or taper tubes.
In the case of a down-blow of wind, the wind passing into the outer space of
the ventilator through the conical annulus at the top, is deflected from side to side
between the outer casing and the tubes until striking the bottom of the ventilator,
when it is reflected upwards and passes through the ventilator in the same manner
as the vitiated air, until it finally escapes at the top through which it entered.
More than two of such superposed tubes may be used.
At the bottom of the outer casing as well as at the bottom of the lower parallel
or taper tube one or more openings are formed for the purpose of allowing the
discharge of rain or water of condensation.
It is to be understood that the improved ventilators may be made circular, square
or polygonal or of other shape in horizontal section.

page_text: And in order that my said Invention may be properly understood, I now proceed
more particularly to set forth the system, mode or manner in or under which tho
same is or may be used or practically carried into effect, reference being had to the
accompanying Drawings and to the Letters and Figures marked thereon, that is
to say:-
Figure 1, represente in elevation a ventilator constructed according to and
constituting my present Invention.
Figure 2, is a plan of the same.
Figure 8, represents the same in vertical section.
In carrying my present Invention into practice, I provide the tube a, leading
from the hall or other building to be ventilated. Through this tube a, the vitiated
air passes from the said hall or building to the upper part of the ventilator
as hereinafter more particularly described. Around the upper or discharge orifice
of this tube a, there is provided the tube b, of larger diameter and which tube b,
may be parallel throughout its length, but which is preferably made taper with the
smallest diameter of the taper uppermost as represented at Figure 3. Above this
tube b, there is further provided the tube c, which may also be parallel throughout
its length, but which is preferably made taper with the smallest diameter of the
taper uppermost. The tube c, is closed over at the top by the plate d, which is
preferably formed concave on its underside. This plato d, is secured to the
supports e, so that between such supports the annular openings f, are formed. The
lower part of the tube c, is secured to the upper part of the tube b, by means of
similar supports g, so that between these two tubes c, and b, there are also provided
the annular openings h. Above the plate d, there is placed the conical cap i, and
the cylindrical casing j, formed with the taper or conical top k, surrounds tho
whole of the apparatus herein before described, and these together constitute the
entire ventilator.
The action of the improved ventilator is as follows, the course of the current of
vitiated air passing out therothrough being represented by the arrows shewn at
Figure 3 of the accompanying Drawings. The ascending current of vitiated
air passing off from the hall or building to which this improved ventilator is
applied, strikes against the underside of the plate d, and is thereby deflected
through the annular spaces f. The current then passes upwards between the outer
surface of the conical cap i, and the inner surface of the taper or conical top k,
and is thereby allowed to escape. Any of the ascending current of vitiated air
which does not escape by these means is discharged through the annular openings h,
formed between the tubes c, and b. In the event of a down-blow of wind passing
into the space formed between the casing j, and the enclosed ventilating tubes, by
means of the conical annulus formed at the top, the said wind is deflected from side
to side between the casing j, and the contained tubes c, and b, until, striking the
lower plate or base 4, it is reflected upwards and passes through the annular
spaces, and outwards through the ventilator together with and in the same
manner as the outgoing current of vitiated air, finally escaping at the top through
which it entered. At the lower part of the outer casing j, as well as at the lower
part of the lower tube one or more orifices m, are provided for the purpose of
allowing the discharge of any rain or water of condensation that may have fallen
between these parts. Or the ventilators herein before described may be provided
with a further conical cap (not represented on the accompanying Drawings), but
which is placed above and projects over the upper edges of the taper top k, and is
supported from such top by brackets of any suitable construction. Under these
circumstances the cap i, is shortened and closed in at the top. This further conical
cap, when provided, prevents any rain or wind falling or blowing down into the
ventilator.
It is to be understood, although in the ventilator herein before described with
reference to the accompanying Drawings, I have employed only the two tubes b,
and c, that I may employ in such ventilators more than two such superposed tubes.
And it is further to be understood that the system of ventilation I have shown to

page_text: be carried out by the improved ventilator herein before described, and represented
on the accompanying Drawings as circular in form, may also be carried out by
ventilators of other shape in horizontal section without departing from the essential
features of my Invention, as the said shape may be varied in many ways such for
example as ventilators formed of square, or polygonal, horizontal or transverso
section.
Having now described and particularly ascertained the nature of my said
Invention and the system, inode or manner in or under which the same is or
may be used or practically carried into effect, I would observe in conclusion that
what I consider to be novel and original and therefore_claim as the Invention
secured to me by the hereinbefore in part recited Letters Patent is :—
Ventilators consisting of the tubes b, and c, plate d, supports e, and g, annular
openings f, and h, conical cap i, casing j, taper or conical top k, base plate 1,
orifices m, all substantially as and for the purposes hereinbefore set forth with
reference to the accompanying Drawings or the mechanical equivalents of all or
any of the said parts.
In Witness Whereof I the said Thomas Bauchop have hereunto set my hand
and Seal this second day of May in the year of our Lord One thousand eight
hundred and eighty-four.