IMPROVEMENTS IN VENTILATING GREASE TRAPS OR FAT INTERCEPTORS FOR HOUSE SINKS AND WASHERS
Year: 1884

page_text: I GEORGE CHARLES DAVIES of 65 Lausanne Road Peckham S.E. in the County
of Surrey, Clerk of Works, do hereby declare the nature of my Invention for
IMPROVEMENTS IN VENTILATING GREASE TRAPS OR FAT INTERCEPTORS FOR
HOUSE SINKS AND WASHERS to be as follows:-
My said invention has reference to a new or improved construction or arrange-
ment of traps or interceptors, to be used for the purpose of collecting the grease or
fat passing down the waste pipes from house sinks or washers; and also to
prevent the unpleasant odour that often arises from the ordinary traps at present
used for the purpose.
The improvement and novelty, of the said grease trap or fat interceptor, consist
in obtaining a continuous current of air through the same, and also through the
waste pipe by means of a syphon arrangement in connection with an air chamber
on top of trap, thereby thoroughly ventilating the same. The trap consists of
a receiver, having the waste pipe preferably fixed in the bottom of the same, and
which forms a standing waste level with the height of water in trap, the lower end
of this pipe being carried into the open air, and made to discharge over a trapped
gully. Round the upper end of the waste pipe is placed a movable cylinder, about
twice the diameter of the waste pipe, with inlets at bottom, through which the
waste water passes up the cylinder and thence down the waste pipe; the cylinder
being of sufficient height to prevent any grease being carried over the top of same
into the waste pipe. On the bottom of the Receiver lays a movable tray for, the
purpose of removing the grease and other deposits, when cleaning out the trap.
The top of the trap is formed by a flanged boxed cover, the sides of which pass
down into the water of trap, forming an air chamber; into this chamber the short
arm of the syphon ventilating pipe is inserted. Both ends of the waste pipe being
open, the air passes up the pipe into the air chamber, and is drawn out by the
exhaust syphon, the long arm of which is carried up sufficiently high above the
roof of house for the purpose and baving an air extractor fixed on top. In fixing
the trap it is preferable to keep the bottom of trap about 1ft 6in below the bottom
of sink. The traps may be made of iron, zinc, or other suitable material, and to
any size or shape required.

page_text: And in order that the nature novelty and mode of performing ny said invention
may be fully understood, I will now proceed to describe the several figures on the
accompanying drawings, which I have hereunto appended, for the purpose of
shewing the best means, I am at present aware of, for carrying my said invention
into effect or practice. Fig 1, is a longitudinal section through the trap. A, being
the receiver. B, the waste pipe from same, which should be about twice the
diameter of the inlet from the sink. C, is the movable cylinder placed round the
waste pipe and having guides fixed inside to keep it in position. D, is the per-
forated tray, for removing the grease and other deposits from the trap. E, E, the
handles for lifting the tray. F, is the flanged boxed cover attached to receiver by
screws. G, G, Handles (sunk) for lifting the cover. H, the syphon ventilating
pipe same size as waste pipe. I, pipe for draining off condensation etc. J, the
waste pipe from sink forming inlet into trap Fig 2. is a plan of the said trap,
shewing the position of the pipes, any of which may be varied to suit position of
sink, or other circumstances.

page_text: COMPLETE SPECIFICATION,
I GEORGE CHARLES DAVIES of 65 Lausanne Road, Peckham, S.E. in the County
of Surrey, Clerk of Works, do hereby declare the nature of my Invention for
IMPROVEMENTS IN VENTILATING GREASE TRAPS, OR FAT INTERCEPTORS FOR
HOUSE SINKS AND WASHERS and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-.
My said Invention has reference to a new or improved construction or arrange-
ment of traps or interceptors, to be used for the purpose of collecting the grease or
fat passing down the waste pipes, from house sinks or washers, and also to prevent
the unpleasant odour that arises from the ordinary traps at present used for the
purpose.
The improvement and novelty of the said grease trap or fat interceptor, consists
in obtaining a continuous current of air through the same, and also through the
waste pipe, by means of a syphon arrangement in connection with an air chamber
on top of trap, thereby thoroughly ventilating the same. The trap consists of a
receiver, having the waste pipe preferably fitted in the bottom of the same, and
which forms a standing waste level with the height of water in trap; the lower
end of this pipe being carried into the open air and made to discharge over a
trapped gully. Round the upper end of the waste pipe is placed a movable
cylinder, about twice the diameter of the waste pipe with inlet apertures at bottom,
through which the waste water passes up the cylinder and thenco down the waste
pipe, the cylinder being of a sufficient height to prevent any grease passing over
the top of same into the waste pipe; instead of the cylinder any other shaped case
may, if preferred, be used for this purpose. On the bottom of the receiver is
placed a movable tray, for the purpose of removing the grease and other deposits
when cleaning out the trap. The top of the trap is formed by a flanged box cover,
the sides of which are made to telescope into the receiver, and pass down below
the water level of trap, forming an air chamber; into this chamber the short arm
of the syphon ventilating pipe is inserted. Both ends of the waste pipe being open,
the air passes up the pipe into the air chamber, and is drawn out by the exhaust
syphon, the long arm of which is carried up sufficiently high above the roof of
house for the purpose, having an air extractor fixed on top. In fixing the trap, it
is preferable to keep the bottom of trap about 1', 6" below the bottom of the sink
or washer, These traps may be made of iron, zinc, copper, or other suitable
material, and to any size or shape required.
And in order that the nature, novelty, and mode of performing my said invention
may be fully understood, I will now proceed to describe the several figures on the
drawings, which are appended to my provisional Specification for this Invention,
(N° 14,125, and dated the 25th day of October 1884) for the purpose of shewing
the best means, 1 am at present aware of, for carrying my said invention into
effect or practice. Fig. 1, is a longitudinal section through the centre of trap, A,
being the tank or receiver. B, the waste pipe from same, which should be about
twice the diameter of the inlet pipe from the sink; this waste pipe may be either

page_text: fixed or ground into washer, as a discharge valve for emptying trap; it may also,
where the fall is limited, be made to pass through the side of trap, instead of
through the bottom. C, is the movable cylinder placed round the waste pipe fitted
with guides to keep it in position. D, is the perforated tray, for removing the
grease and other deposits from the trap. E, E, Handles for lifting the tray. F, is the
Hanged box cover, attached to the rim of the receiver by screws. G, G, Handles for
lifting the cover. H, the syphon ventilating pipe, same size as waste pipe. I, pipe
for draining off condensation. J, the waste pipe from sink, forming the inlet into
trap; any grease passing this inlet into the cold water of trap, rises to the top of
same, and remains congealed there, until removed by the perforated tray before
mentioned.
Fig. 2, is a plan of the said trap, showing the positions of the pipes, cylinder, etc.
The position of any of the pipes may be varied to suit the sink, or other
circumstances.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
เ
1, The combination with a movable telescopic box cover, forming the air chamber
in a grease trap or fat interceptor, of a syphon ventilating pipe arrangement,
substantially as described, and shewn in the before mentioned drawings, or any
mere modification thereof for the purpose set forth.
2, The combination with an open waste pipe having a clear air way, standing or
otherwise, in a grease trap,. or fat interceptor, of a syphon ventilating pipe,
substantially as described, and shewn in the before mentioned drawings, or any
mere modification thereof for the purpose set forth.
3, The combination with a standing or upright waste pipe, in a grease trap or
fat interceptor, of a movable box cover to the said trap, the sides of which
telescope into the receiver of trap, to a depth below the water level, substantially
as described, and shewn on the before mentioned drawings, for the purpose
set forth.