A Ventilating Air Pipe and Cowl Apparatus.
Year: 1890

page_text: Date of Application, 22nd Nov., 1890
Complete Specification Left, 8th May, 1891—Accepted, 13th June, 1891
PROVISIONAL SPECIFICATION.
A Ventilating Air Pipe and Cowl Apparatus.
ROBERT GREGORY Engineer 27 Chalfont Road Islington HENRY HARRIS
Engineer 143 Nevill Road Stoke Newington do hereby declare the nature of this
invention to be as follows:-
This invention consists of ventilating air pipe and cowl in which are arranged at
intervals openings of bell mouth form or if necessary any other shape to these
openings bends and nozzles of size and diameter to suit the air shaft would be
connected by rivets or otherwise and directed to centre of air pipe and cowl and
are so formed as to induce and regulate the air-currents in the desired direction.
The cowl would work on a pivot or centre and the lap joint being sealed in water
would effectually prevent all down draught.
The improvements have reference to means of effecting and regulating induced
currents of air more particularly in connection with ventilating apparatus such as
is described in the Specification of Letters Patent, as granted to Robert Gregory
and Henry Harris aforesaid dated the 23rd day of November 1885, No. 14,313.
Dated this 22nd day of November 1890.
ROBT. GREGORY.
HENRY HARRIS.
COMPLETE SPECIFICATION.
A Ventilating Air Pipe and Cowl Apparatus.
We, ROBERT GREGORY of 27 Chalfont Road, Islington, in the County of
Middlesex, and HENRY HARRIS of 143 Nevill Road, Stoke Newington, in the
County of Middlesex, Engineers, 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 :—
Our invention relates to an improvement in ventilating pipes, or cowls, for the
more effectually regulating by natural laws the ventilating of apartments, tunnels,
ships mines, or any enclosed space, or place where a proper and efficient ventilation
can only be obtained by artificial means, and is adaptable for use as a perfect and
entire apparatus, or in connection with our improved ventilating device for which
we obtained Letters Patent No. 14313 dated November 23rd 1885, the object of
our present invention being to dispense with the need of a forced draught to attain
the end desired, and to construct an apparatus that may be fitted to the outlet, or
exhaust of almost all existing ventilating appliances, and for attachment to, with,
or upon domestic chimneys for the cure of smoky flues.
In order that our invention may be more clearly understood we have appended
the accompanying sheet of drawings, in which
Fig. 1 is a side elevation of the apparatus forming the subject of our present
invention.
Fig. 2 is a back elevation of same partly broken off at the lower end.
Fig. 3 is a vertical section of Fig. 1.
Fig. 4 is a view illustrating the manner of adapting our present invention to that
for which we obtained Letters Patent before mentioned.
Our invention in its entirety consists mainly of two parts A, and B, the former
arranged to revolve within, or upon the latter.
In carrying our invention into effect we construct of any suitable material, and
shape, but preferably of zinc and of the form shewn by the drawings, a cowl, or
bonnet A, provided with a vane C, with supports a and a. Upon the back of A
and fixed thereto by any approved means, are two, or more bell, trumpet, or other

page_text: shaped openings D, and E, extending from which within A are continuations, or
nozzles b, and c, bent, or otherwise formed in the direction of the updraught and
inclining towards the centre of said cowl, or bonnet, the dimensions of which are
arranged to suit the size, or capacity thereof. Within the lower end of A, centrally
therewith, and extending a suitable distance therebeyond, we fix by means of cross
ties, or stays d, a spindle, or pivot F.
The shaft, or tube B, preferably but not imperatively of the same material as A,
carries within its centre à tube G, fixed therein by cross ties, or stays e similar to d
in A. The lower end of G is plugged, or stopped by a solid metallic piece. The
upper end of B is formed externally with, or has connected thereto, a swelling 9,
and carries internally a collar, or ring H, which may be either connected to, or
forn part of B, that is to say, H may be a continuation of B, if y be attached
thereto, or may be attached to B if y be a continuation thereof. The object
of g and H is to form by their united presence an annular space around the upper
surface of B, in order that, when the spindle F in A, is inserted within the tube G
in B, and resting, or riding upon the plug, the lower end of A. may be within said
annular space, as shewn by Fig. 3, and said space being partly, or wholly filled
with water, or oil, acts as a perfect seal to prevent the possibility of down-draught
entering from the outside, and we further insure this by arranging a flange k upon
the exterior of A which forms a canopy for g.
It will be understood from the foregoing description and by reference to the
accompanying drawings, that when A is in position upon B, that A. can freely
revolve with its spindle F, within the tube G, and as the mouth of A would always
point in the direction of the wind, or external current of air, by the action of
the vane C, the mouths of D, and E, would be always in a position to receive the
same, and this entering D, and E, and passing through the nozzles b, and
cause an updraught within A, and so carry off the heated gases by the natural law
of convection, from the exhaust, or outlet tube of the ventilating appliance, or the
smoke from the chimney, to which B may be attached, and we find in practice that
the greater the external current of air, the more operative our appliance
becomes.
would
In Fig. 4 we have shewn how, by means of an extending tube J, attached to K,
which represents part of the apparatus forming the subject of our prior invention
and Patent No. 14313 of A.D. 1885, the apartment to which K may be fitted can
be easily and effectually ventilated without the need of forced draught. The
extension J being arranged to fit within B, in a like manner B may be fitted within,
or upon the outlet of almost any existing ventilating apparatus, or chimney pot, for
the purposes hercin set forth.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1st. In an improved ventilating appliance the apparatus herein described, con-
sisting of the several parts, combined, and operating, substantially as herein set
forth, and for the purposes specified.
2nd. In an improved ventilating and smoke preventing apparatus the construction
and use of a cowl, or bonnet A, provided with openings D and E, with nozzles
and e, extending within A, the flange h, and pivot spindle F, in combination with a
tube, or shaft B, with internal fixed tube G, for the reception of F, the annula
space formed by g and H, within, or upon B, to act as a seal to prevent down
draught, substantially as and for the purposes herein described and shewn by the
accompanying drawings.
:
GEO. THOS. HYDE,
4, Moorfields, London, E.C., Agent for the Applicants.