IMPROVEMENTS IN HEADS AND GRATINGS FOR AIR INLETS AND FOR OUTLETS USED FOR THE AËRATION AND VENTIL ÁTLAN An Save
Year: 1881

page_text: LETTERS PATENT to Hugh Stowell Cregeen, of 42, Freelands Road, Bromley,
in the County of Kent, for an Invention of IMPROVEMENTS IN HEADS
AND GRATINGS FOR AIR INLETS AND FOR OUTLETS USED FOR THE AËRATION
AND VENTIL ÁTLAN
An Save D
PROVISIONAL SPECIFICATION left by the said Hugh Stowell Cregeen at
the Office of the Commissioners of Patents on the 20th December 1881.
"
HUGH STOWELL CREGEEN of 42 Freelands Road Bromley in the County of
Kent. IMPROVEMENTS IN HEADS AND GRATINGS FOR AIR INLETS AND FOR
OUTLETS USED FOR THE AERATION AND VENTILATION OF SOIL PIPES AND
DRAINS."
At present air inlets and outlets also gratings over same for admitting pure air
to or as a means of escape of foul air from soil pipes and drains are constructed
of hopper heads with open grilled gratings there is consequently no protection
against stones dirt and other foreign natter dropping through the grating and
passing down the air pipe and lodging in the drain or syphon trap of drain so as
to form an obstruction to remove which would necessitate excavation. To obviate
this defect I form the heads and gratings for the air inlets or outlets as the case
may be of a flat box either square circular or other convenient shape closed at
bottom with the exception of a pipe projecting a distance upwards into it through
the centre of the bottom so that a trough is formed all round the pipe. This pipe
is also continued a distance below so that it may be connected with an ordinary
socket pipe. The top of the box is rebated to receive a grating. That part of
the grating immediately covering the top of the piece of pipe projecting up in the
inside of the box is made solid and without perforation in consequence of which all
matters passing down through the perforations of the grating will drop into and
collect in the trough formed around the pipe as before described.
The stones dirt &c. so collected in the trough can be removed at any time if
the grating is raised.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Hugh Stowell Cregeen in the Great Seal Patent Office on the
20th June 1882.
HUGH STOWELL CREGEEN of 42 Freelands Road Bromley in the County of
Kent. "IMPROVEMENTS IN HEADS AND GRATINGS FOR AIR INLETS AND FOR
OUTLETS USED FOR THE AERATION AND VENTILATION OF SOIL PIPES
DRAINS."
AND
At the present air inlets and outlets also gratings over same for admitting pure
air to or as a means of escape of foul air from soil pipes and drains are constructed
of hopper heads with open grilled gratings there is consequently no protection
against stones dirt and other foreign matter dropping through the grating and
passing down the air pipe and lodging in the drain or syphon trap of drain so as
to form an obstruction to remove which would necessitate excavation. To obviate
this defect I form the heads and gratings for the air inlets or outlets as the case
may be of a flat box either square circular or other convenient shape closed at
bottom with the exception of a pipe projecting a distance upwards into it through
-the centre of the bottom so that a trough is formed all round the pipe. This pipe
is also continued a distance below so that it may be connected with an ordinary
socket pipe.
The top of the box is rebated to receive a grating. That part of the
grating immediately covering the top of the piece of pipe projecting up in the
inside of the box is made solid and without perforation in consequence of which all
matters passing down through the perforations of the grating will drop into and
collect in the trough formed around the pipe as before described. The stones dirt
etc. so collected in the trough can be removed at any time if the grating is
raised.
My improved head and grating may be manufactured in stoneware iron and
other substances it is represented by the Drawings annexed.
What I claim is my improvements in heads and gratings for air inlets and for
outlets used for the aeration and ventilation of soil pipes and drains, substantially
as described.
In witness whereof I the said Hugh Stowell Cregeen have hereunto set my
hand and seal this Twentieth day of June in the year of our Lord One
thousand eight hundred and eighty two.
Signed and sealed by the above
named Hugh Stowell Cregeen
in the presence of
JOSHUA BAILEY,
HUGH STOWELL CREGEEN. (L.S.)
Clerk to the Bromley Local Board.