IMPROVEMENTS IN VENTILATING POTS OR COWLS FOR SOIL PIPES."
Year: 1881

page_text: LETTERS PATENT to Thomas Bate, of Kilburn, in the County of Middlesex,
for an Invention of "IMPROVEMENTS IN VENTILATING POTS OR COWLS FOR
SOIL PIPES."
PROVISIONAL SPECIFICATION left by the said Thomas Bate at the Office of
the Commissioners of Patents on the 29th January 1881.
THOMAS BATE, of Kilburn, in the County of Middlesex.
VENTILATING POTS OR COWLS FOR SOIL PIPES."
"IMPROVEMENTS IN
This Invention has for its object to provide a ventilating pot or cowl for
the tops of soil pipes, which shall effect the extraction of sewer gas from the
soil pipes, and act under any direction or force of wind, thereby making a down
drauglit impossible.
For this purpose I form a ventilating pot or cowl of the pattern of an ordinary
cone chimney-cowl, that is, with an overhanging coned cover supported above the
top of the soil pipe, and at a distance from it by radial projecting wings. At the
top of the cone is an outlet, from which rises a cylinder of wire gauze, or other
form of woven or perforated cover, and above this a protecting cap. The wire
gauze or other perforated cover prevents the down-draught that occurs with the
xed and revolving cowls now in use, and which, in certain directions of the wind,
become inlets instead of outlets, causing the sewer gas to be forced back into the
house under great pressure.
The wire gauze, or net work, or other perforated material, may similarly bo
placed across the outlet of other forms of cowls to effect the same object.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Bate in the Great Seal Patent Office on the 20th July
1881.
THOMAS BATE, of Kilburn, in the County of Middlesex.
VENTILATING POTS OR COWLS FOR SOIL PIPES,"
"IMPROVEMENTS IN
This Invention has for its object to provide a ventilating pot or cowl for the
tops of soil pipes, which shall effect the extraction of sewer gas from the soil
pipes, and act under any direction or force of wind, thereby making a down
draught impossible.
The wire
For this purpose I form a ventilating pot or cowl of the pattern of an ordinary
cone chimney cowl, that is, with an overhanging cone cover, supported above the
top of the soil pipe, and at a distance from it by radial projecting wings. At the
top of the cone is an outlet, from which rises a cylinder of wire gauze, or other
form of woven or perforated cover, and above this a protecting cap.
gauze or other perforated cover prevents the down draught that occurs with the
fixed and revolving cowls now in use, and which, in certain directions of the wind,
become inlets instead of outlets, causing the sewer gas to be forced back into the
house under great pressure.
The wire gauze, or net work, or other perforated material, may similarly be
placed across the outlet of other forms of cowls to effect the same object.
Figure 1 shews a side view, and Figure 2 a vertical section of a ventilating
pot or cowl constructed in the manner I prefer for carrying out my Inventiou.
A is a tube or pot, the lower end of which is to be secured in the usual manner
to the upper end of a ventilating pipe carried up from a soil pipe; B, D, are wings
of sheet metal standing out radially from this pipe; there may be 4, or 6, or other
desired number of such radial wings; C is a coned cover supported by these radial
wings, and having an outlet at the top; D is a cylinder of wire gauze soldered at
its lower end to the upper part of the cone, and rising up above the outlet at the
top of the cone; E is a cap of sheet metal at a short distance above the top of the
gauze cylinder, it is carried by four or other number of metal rods F from the cone
as shewn. Within the interior of the cone C, and between it and the tube A is a
smaller cone G, also carried by the radial wings B as shewn. This inner cone
adds to the efficiency of the ventilating pot or cowl, but it might be constructed
without this inner cowl.
Having thus described the nature of my Invention and the manner of performing
the same, I would have it understood that I claim,-
First. The construction of ventilating pots or cowls for soil pipes, substantially
as herein before described and illustrated in the Drawing annexed.
Second. The application of wire gauze or such like perforated material around
the outlet of ventilating pots or cowls for soil pipes, substantially as described.
In witness whereof, I, the said Thomas Bate, have hereunto set my hand and
seal, this Twenty eighth day of July, in the year of our Lord One thousand
eight hundred and eighty one.
THOMAS BATE. (L.S.)