Improvements in Ventilating Apparatus for Improving Chimney Draughts and Promoting Draught in Ventilating Shafts.
Year: 1888

page_text: Date of Application, 20th Jan., 1888
Complete Specification Left, 20th Oct., 1888
Complete Specification Accepted, 23rd Nov., 1888
Improvements in Ventilating Apparatus for Improving Chimney
Draughts and Promoting Draught in Ventilating Shafts.
I EDWARD PEART BRETT 18 Spurriergate York Brewer & Wine & Spirit
Importer do hereby declare the nature of this invention to be as follows:-
This Invention consists of a pipe which when used for ventilating purposes is fixed
in any convenient position in the building or shaft and when used for chimney
draught it is fixed on the chimney top. Attached to this pipe is an outer case or pipe
kept in position by vertical webs or stays leaving an annular space equal to the area
of the main pipe. This outer case has openings to which pipes are attached internally
and pointing upwards, being by preference arranged in spiral form. A conical shaped
cover open at the top is attached by stays to the outer pipe or case and a smaller size
pipe with a conical cover is fixed over the opening. The action is promoted by the
draught through the side pipes operating upon the upward current from the main pipe
and increasing the draught therefrom in proportion to the heat and rarefication of the
ascending draught.

page_text: Draughts and Promoting Draught in Ventilating Shafts.
I, EDWARD PEART BRETT 18 Spurriergate, York, Brewer and Wine Merchant,
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 ventilating apparatus or appliances, and has for its object to
ensure in ventilating shafts and chimnies an induced updraught whereby heated and
vitiated vapors from buildings, and smoke from chimnies may be efficiently removed,
and a better circulation of fresh air obtained.
In order that my invention may be the better understood I have appended the
accompanying sheet of drawings in which Figure 1 is an elevational view of my
improved ventilating apparatus, and Figure 2 is a vertical section thereof.
The device or appliance according to my invention comprises a tube or pipe B
formed of any suitable material, such for instance as metal, earthenware and the like,
and of such size as to allow of its being fitted to a chimney top; or, when used a
ventilator, placed in any convenient position on a building, or to the top of a ventilator
shaft. Upon the tube B above referred to is disposed an outer casing or tube A
secured thereto by webs, stays or equivalents a; the area of the annular space between
the tubes A, B, being equivalent to the area of the main pipe B.
The outer casing A is formed with a number of apertures d (Figure 1), to which
latter are secured auxiliary tubes or pipes C, corresponding in number to the apertures
in the outer casing A aforesaid. Said auxiliary tubes or pipes C are by preference
arranged in spiral form, and are disposed vertically within the outer casing A, the
inner open ends pointing upwards as shown. Upon the top of the outer casing or
tube A is fitted a conical shaped cap or cover D secured thereto and supported by
webs, stays or the like. Fitted to an opening in the top of the conical cap or cover
is a small pipe b, also provided with conical shaped cap or cover e.
From the foregoing it will be observed that there are no movable parts, and inas-
much as the wind, from whichever direction it may be blowing,-in impinging
against the surface of the outer casing or pipe A, must enter the auxiliary tubes
disposed upon that side of the outer casing or tube against which the wind may be
blowing, and passing upwards therethrough, will create an updraught with the two
tubes A and B, and thereby draw up the smoke or vitiated vapors through the
chimney or ventilating shaft (as the case may be), which would pass out through the
opening beneath the caps or covers D and c.
By the employment of the improved ventilating apparatus according to my inven-
tion, not only is an efficient up-draught ensured, but, by virtue of the obstruction
offered by the vertical auxiliary tubes C, and the currents of air always passing up
therethrough, the creation of a down-draught is reduced to a minimum.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
First: The improved ventilating apparatus for improving chimney draughts and
promoting draught in ventilating shafts, substantially as herein described and illustrated
in the accompanying drawings.
Second: In the improved ventilating apparatus referred to in the preceding
claim, the adaptation to the outer casing A of auxiliary tubes C arranged substantially
as and for the purposes herein set forth.
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.