IMPROVEMENTS IN THE CONSTRUCTION OF SYPHONS AND TRAPS FOR SINKS, DRAINS, CLOSETS, AND OTHER LIKE PURPOSES
Year: 1880

page_text: LETTERS PATENT to David Brown, of Huddersfield, in the County of York,
for an Invention of "IMPROVEMENTS IN THE CONSTRUCTION OF SYPHONS
AND TRAPS FOR SINKS, DRAINS, CLOSETS, AND OTHER LIKE PURPOSES.”
PROVISIONAL SPECIFICATION left by the said David Brown at the Office
of the Commissioners of Patents on the 17th November 1880.
DAVID BROWN, of Huddersfield, in the County of York. "IMPROVEMENTS IN
THE CONSTRUCTION OF SYPHONS AND TRAPS FOR SINKS, DRAINS, CLOSETS, AND
OTHER LIKE PURPOSES."
The object of my Invention is the construction of a simple and effective trap
for sinks, drains, and closets, whereby foul air and noxious vapours are effectually
trapped, whether there is water in the syphon or not.
In the induct pipe of an ordinary syphon I form a globular space or cavity of
convenient and suitable size, in which I place a ball made of any buoyant substance,
such as cork or wood, coated with india rubber (or an hollow india rubber or
metallic ball). The ball is of larger diameter than the induct and educt pipes, and
when there liquid in the syphon the ball is by the pressure of the liquid held
against the induct pipe mouth; the foul air is effectually trapped. Should there
be no water in the syphon the ball rests on the mouth of the educt pipe at the
bottom of the globular vessel, and also prevents the foul air from rising from the
drain. Should there be a leakage at cleansing plug or other part of the syphon
the ball prevents the air from entering the educt pipe, and so stops the liquid from
leaking or running entirely out of the syphon.
O SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said David Brown in the Great Seal Patent Office on the 17th May 1881.
DAVID BROWN, of Huddersfield, in the County of York. "IMPROVEMENTS IN
THE CONSTRUCTION OF SYPHONS AND TRAPS FOR SINKS, DRAINS, CLOSETS, AND
THE LIKE PURPOSES."
The object of my Invention is the construction of a simple and effective trap for
sinks, drains, and closets, whereby foul air and noxious vapours are effectually
trapped, whether there is water in the syphon or not.

page_text: In the induct pipe of an ordinary syphon or trap I form a globular space or
cavity of convenient and suitable size in which I place a ball made of any buoyant
substance, such as cork or wood, coated with indiarubber (or an hollow indiarubber
or metallic ball). The ball is of larger diameter than the induct and educt pipes.
When there is water or liquid in the syphon the ball is by the pressure of the liquid
held against the induct pipe mouth or seat; the foul air is thus effectually trapped.
Should there be no water in the syphon the ball rests on the mouth or seat of the
educt pipe at the bottom of the globular vessel, and prevents the foul air from
rising from the drain. Also should there be a leakage at cleansing plug or other
part of the syphon the ball prevents the air from entering the educt pipe, and so
traps the liquid from leaking or running entirely out of the syphon.
Such being the nature and object of this my said Invention, in order that the
same may be fully understood I have hereunto annexed a Sheet of Drawings
illustrative thereof, and have marked the same with figures and letters of reference.
DESCRIPTION OF DRAWINGS.
Figure 1 is an elevation in section of my improved syphon or trap. A is the
induct pipe, and A' the educt pipe of an ordinary syphon or trap; B is the globular
space or cavity, of convenient and suitable size, in which I place a ball C, made of
any buoyant substance, such as cork or wood, coated with indiarubber, or an hollow
indiarubber or metallic ball. The ball is of larger diameter than the induct and
educt pipes A and A'. When there is water or liquid in the syphon the ball is by
the pressure of the liquid held against the induct pipe, mouth, or seat D; the foul
air is thus effectually trapped. Should there be no water in the syphon the ball
rests on the mouth or seat D of the educt pipe A¹ at the bottom of the globular
vessel, and prevents the foul air from rising from the drain. Also should there be
a leakage at cleansing plug or other part of the syphon the ball prevents the air
from entering the educt pipe, and so stops the liquid from leaking or running
entirely out of the syphon.
Having thus described and particularly ascertained the nature of my said
Invention, and the manner in which the same may be performed or carried into
effect, I would have it understood that what I claim as the Invention to be secured
to me by the herein before in part recited Letters Patent is,-
The syphon or trap constructed and arranged so that the valve a ball acts upon
the seats of the induct and educt pipes in the manner and for the purposes as herein
described and illustrated in the Drawings here unto annexed.
In witness whereof, I, the said David Brown, have hereunto set my hand and
seal, this Sixth day of May, in the year of our Lord One thousand eight
Witness,
JOHN E. WALSH,
Patent Agent,
Crossley Street, Halifax,
and 30, East Parade,
Leeds.
DAVID BROWN. (L.S.)