Improvements in the Detail Constructive Parts of Revolving Ventilator or Chimney Cowls.
Year: 1896

page_text: Date of Application, 2nd Oct., 1896
Complete Specification Left, 30th June, 1897-Accepted, 7th Aug., 1897
PROVISIONAL SP
CATION.
Improvements in the Detail Constructive Parts of Revolving
Ventilator or Chimney Cowls.
We, GEORGE EWART, and FRIEDERICH JOHANN DITRICH HULLINGHORST, both of
346 Euston Road, County of London, Metal Workers, do hereby declare the nature
of this invention to be as follows:-
This invention relates to certain detail appliances or fixings, also to a method of
building up a Ventilator or Chimney Cowl in order that the usual system of
soldering the parta together may be dispensed with, and to provide for noiseless
revolutions even under strong winds or gales, and further to ensure the retention of
oil and a central position of the spindle in the oil tube and prevent escape of oil
during the ordinary method of transport.
For the purpose of this invention, the throat tube is furnished with a bezil over
which a rolled edged capping is placed to close the meeting or overlap scam.
These are fixed in place by bolts or rivets passed through legs of a skeleton frame
on which is also fixed by bolts or rivets the oil tube, this being of great depth and
is lined with a liner ferrule for the spindle to ride in and be kept upright.
The upper end of this tube is swelled and serves as an oil cup or bason and its
upper edges are shaped for the reception of a washer closed in oil tight and serving
to steady the spindle whon passed through its central opening.
The cage is composed of two dished ring plates and a series of vanes or angularly
set blades, the vertical edges of which are rolled for the reception of screw
threaded rods, the ends being shaped to fit the dished rings, so that when nuts are
placed on the rods the several parts can be drawn into close contact and be made
rigid with each other. The upper ring is of greater depth and acts as a shield and
deflector to the uprising air or smoke.
The dome has a bezil to fit close over the top edge of the upper dished ring and
has a flat top with a depressed edge over and in contact with which a spire is fitted,
this being surmounted by a finial or point knob into which the upper end of the
spindle is screwed, and these several pieces by a nut under the flat top of the dome
are drawn into close contact.
The throat being of drawn tube can be fitted over any base tube or shoulder
piece, or be set in brickwork or cement as in the ordinary manner.
One of the many advantages to be gained by the above construction of revolving
Cowl is:-Any part can be readily separated without necessitating the removal of
the whole Cowl and fresh pieces can be fitted where necessary, no solder being used.
It is proposed to make these Cowls as light as possible consistent with strength
such as from aluminium for which at present there is no practical method of
soldering the parts together but such Cowls can be in Copper, Zinc, Tin plate,
sheet Iron, or the like.
·נית
011
1000

page_text: Improvements in the Detail Constructive Parts of Revolving
Ventilator or Chimney Cowls.
We, GEORGE EWART and FRIEDERICH JOHANN DITRICH HULLINGHORST, both of
346 Euston Road, County of London, Metal Workers, 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:-
This invention relates to certain detail appliances or fixings, also to a method of
building up a Ventilator or Chimney Cowl in order that the usual system of
soldering the parts together may be dispensed with, and to provide for noiseless
revolutions even under strong winds or gales, and further to ensure the retention of
oil and a central position of the spindle in the oil tube and prevent escape of oil
during the ordinary method of transport.
For the purpose of this invention and as we show in the annexed drawings,
Figure 1 section, Figure 2 elevation, the throat tube A is furnished with a bezil B
over which a rolled edge capping C is placed to close the meeting or overlap seam.
These are fixed in place by bolts or rivets D passed through legs E of a skeleton
frame F on which is also fixed by bolts or rivets G the oil tube H this being of great
depth and is lined with a liner ferrule I for the spindle J to ride in and be kept
upright. The upper end of this tube H is swelled and serves as an oil cup or
bason K and its upper edges are shaped for the reception of a washer L closed in
oil tight and serving to steady the spindle when passed through its central opening.
The cage is composed of two dished ring plates M, N, and a series of vanes or
angularly set blades P, P, the vertical edges of which are rolled for the reception of
screw threaded rods Q, Q, the ends of the vanes being shaped to fit the dished ring
plates, M, N, so that when nuts R, R, are placed on the rods Q, Q, the several parts
can be drawn into close contact and be made rigid with each other.
The upper ring N is of greater depth, as at S, and acts as a shield and deflector
to the uprising air or smoke.
The dome T has a bezil U to fit close over the top edge of the upper dished
ring N and at the top is in contact with a spire V, this being surmounted by a finial
or point knob W into which the upper end J' of the spindle J is screwed, and these
several pieces by a nut X under the flat top of the dome are drawn into close contact.
The spindle J may be of hard brass and its lower end be stepped into a bearing
jewelled or other at Y.
The throat A of drawn tube can be fitted over any base tube or shoulder piece, or
be set in brickwork or cement as in the ordinary manner.
One of the many advantages to be gained by the above construction of revolving
Cowl is-Any part can be readily separated without necessitating the removal of
the whole Cowl and fresh pieces can be fitted where necessary, no solder being used.
It is proposed to make these Cowls as light as possible consistent with strength
such as from Aluminium for which at present there is no practical method of
soldering the parts together but such Cowls can be in Copper, Zinc, Tin plate,
sheet Iron, or the like.
Having now particularly described and ascertained the nature of this inven.
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The construction of revolvable Cowl cages and their supporting frames from
shaped parts secured together and in their respective places by bolts and nuts, the
revolvable portion being centrally pivoted and operating from within a tube

page_text: terminating upwardly in an oil cup and provided with a shield, the whole being
arranged and any part capable of easy removal, as and for the purpose or purposes
explained.
The 30th dor of Iun 1907
H. GARDNER,
Patent Agent, 166 Fleet Street, London.
Agent for the said G. Ewart and F. J. D. Hüllinghorst.