Improvements in Chimney or Ventilator Hoods or Cowls.
Year: 1895

page_text: Date of Application, 18th July, 1895
Complete Specification Left 13th Anr
1896-Accented 16th May 1896
Date of Application, 18th July, 1895
Complete Specification Left 13th Apr 1896 -Accented 16th May 1896
PROVISIONAL SPECIFICATION.
Improvements in Chimney or Ventilator Hoods or Cowls.
We, EDWARD WHITE ASTLE of 3 Exeter Street, Derby in the County of Derby,
Hot Water Engineer, and CHARLES ERSKINE TERRY-TERRY of Castle Hill, Duffield,
in the County of Derby, Designer, do hereby declare the nature of this invention to
be as follows:-
The object of our invention is to prevent down draughts in chimneys or ventilating
shafts and to create an up draught or current of air therein.
In carrying out our invention we provide any suitable framework or means of
securing the device to the top of the chimney, ventilating shaft or the like and upon
the said framework we mount a fixed vertical spindle over the centre of the chimney
flue or shaft, this spindle has mounted upon it a sleeve carrying a device which is free
to revolve according to the direction of the wind; this latter device consists mainly of
a horizontal plate set preferably eccentrically of the spindle, that is to say having its
larger part forward of the spindle, and carrying a vane having a pointed or wind
cutting extremity on the front side thereof and a deep or wind catching surface on
the after side of the plate so that whichever way the wind blows the upper part
of the device will swing round on the spindle with the front or wind cutting portion
facing the wind; fixed underneath the plate preferably concentric with the spindle
is an inverted cone the lower portion or apex of which fits upon a boss or projection
on the lower part of the sleeve and the base or upper part thereof is secured to
the underside of the plate. We also fix on the underside of the plate a bow or
V shaped piece with the point to the wind the lower edge of which is arranged to.
come below the top of the chimney or shaft and effectually prevent any wind entering
thereto, this portion may however be made of any shape suitable for accomplishing
such purpose.
It will be understood that the broad part of the vane swings the
upper part of the device into the wind, the bow or V shaped piece and the plate
prevent any down draught while the inverted cone allows the smoke or vitiated air to
pass from the chimney or ventilating shaft, and the wind being caused to pass by the
top of the said chimney or shaft induces an upward current therein.
It is evident that the upper part of our improved device may be mounted upon the
spindle or over the centre of the chimney or shaft in a variety of ways without
employing a sleeve and also that the different parts may be secured together in any
suitable way and constructed of any metal or material best adapted for their
respective purposes.
Dated this 17th day of July 1895
W. SWINDELL,
Agent for the Applicants.
Improvements in Chimney or Ventilator Hoods or Cowls.
We, EDWARD WHITE ASTLE, of 3 Exeter Street, Derby in the County of Derby,
O Hot Water Engineer, and CHARLES ERSKINE TERRY-TERRY of Castle Hill, Duffield.
in the County of Derby, Designer, do hereby declare the nature of this invention and
[Price 8u.]

page_text: in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of our invention is to prevent down draughts in chimneys or ventilating
shafts and to create an up draught or current of air therein.
In describing our invention reference will be had to the accompanying sheet of
drawings upon which :-
Figure 1 is a plan of our improved device.
Figure 2 is a side elevation of the same.
Figure 3 is a vertical section on line a. a of Figure 1.
_ In carrying out our invention we provide any suitable framework A or means of
securing the device to the top of the chimney, ventilating shaft or the like B and
upon the said framework we mount a fixed vertical spindle C over the centre of the
chimney flue or shaft, this spindle has mounted upon it a sleeve D carrying a device
which is free to revolve according to the direction of the wind; this latter device
consists mainly of a horizontal plate E set preferably eccentrically of the spindle, that
is to say having its larger part forward of the spindle, and carrying a vane E' having
a pointed or wind cutting extremity on the front side thereof and a deep or wind
catching surface E' on the after side of the plate, so that whichever way the wind
blows the upper part of the device will swing round on the spindle with the front or
wind cutting portion facing the wind; fixed underneath the plate preferably concentric
with the spindle is an inverted cone F the lower portion or apex of which fits upon a
boss or projection G on the lower part of the sleeve and the base or upper part
thereof is secured to the underside of the plate E. We also fix on the underside of
the plate a bow or V shaped piece H with the point to the wind the lower end of
which is arranged to come below the top of the chimney or shaft and effectually
prevent any wind entering thereto, this portion may however he made of any shape
suitable for accomplishing such purpose. It will be understood that the broad part
of the vane E' swings the upper part of the device into the wind, the bow or
V shaped piece and the plate prevent any down draught while the inverted cone
allows the smoke or vitiated air to pass from the chimney or ventilating shaft and the
wind being caused to pass by the top of the said chimney or shaft induces an upward
current therein.
It is evident that the upper part of our improved device may be mounted upon the
spindle or over the centre of the chimney or shaft in a variety of ways without
employing a sleeve and also that the different parts may be secured together
in any suitable way and constructed of any metal or material best adapted for their
respective purposes.
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: :-
The improved chimney or ventilator hood or cowl consisting of a framework A
adapted to be fixed to the chimney pot, ventilating shaft or the like B, and carrying a
spindle C with boss or projection G supporting a sleeve D carrying an inverted
cone F, plate E with vane E¹ and wind catching extremity E', in combination with
the bow or shaped piece or pieces H, substantially as and for the purposes described
and illustrated.
11 1
11000