Tra
Year: 1886

page_text: Date of Application, 31st July, 1886.
Complete Left, 29th Jan., 1887.
Complete Accepted, 8th Mar., 1887.
I HENRY DEAN of the County of the Borough of Carmarthen Civil Engineer
and Surveyor do hereby declare the nature of this invention to be as follows:-
This invention relates to certain improvements in the construction of intercepting
Gullies and Grease Traps, and to improvements in my patent trap No. 849, A.D. 1873,
the component parts thereof being so arranged as to form a grease and silth trap and
yard gulley with an independent trapped inlet or inlets for the connection of scullery
sinks, bath or other waste pipes so that when fixed outside the house the silth and
other matters in suspension will be deposited in a movable receptacle fitting in the
bottom of trap the grease will rise to the surface and be collected in a grease float
hereafter described and any sewer gas that may force its way through the main trap
or any smell that may arise from any deposit in the trap will find egress at the open
grating and from the arrangement of the trapped inlet or inlets it cannot possibly get
into the house or building through the waste pipes.
My improved trap is constructed of iron, stoneware, or other suitable material and
of circular square, rectangulär or other approved shape, and of various sizes depending
upon its requirements.
The construction is as follows:-
According to one modification it is made in two or more parts the lower portion
being similar to that of my aforesaid patent trap No. 849 A.D. 1873 having a
receptacle for silth or mud at the bottom of the same, the top part is of larger diameter
having a shallow well around the interior of the same with an outlet at the bottom
fitting into the collar of the lower part. This is similar in construction to the fixed
part of a bell trap and is provided with one or more inlets to receive waste or other
pipes. These inlets are trapped by a dip made of cast iron or other suitable material
which when resting on the collar of the trap dips a short distance into the water all
around the said well thus effectually sealing any number of inlets there may be. This
dip is so constructed that any water from the surface falls directly into the main
chamber and does not interfere with the inlet traps and it can be cast in one piece with
the grid if required. The trap may be provided with an adjustable outlet which can

page_text: be fixed in any required direction to the drain. A grease float or chamber is
constructed so as to float on the surface of the water in the main trap or to rest on a
projection or projections provided for the purpose at or near the waterline. This
float protects the surface or head of grease in the trap which is not disturbed by
subsequent discharges. The waste from the scullery or other inlets after passing
under the dip forming the inlet trap will flow down all around the internal face of
main trap the grease at once arising to the surface and into the said float and the silth
into the receptacle provided in the bottom of trap both of which can be readily
emptied and replaced when required, the dip can also be removed at any time it may
be found necessary to clean out the shallow well which together with the dip forms
the inlet traps.
According to a second modification the trap is divided into two chambers the inlet
chamber being shallow and provided with one or more inlets each sealed by a dip
reaching below the surface of the water in such inlet chamber and the main or outlet
chamber which is similar to that in modification No. 1 with the silth receptacle at the
bottom of same as before described. Both inlet and outlet traps are accessable upon
removal of the grid which is made solid over the inlet trap or traps to prevent any
water or anything from the surface interfering with same, and open over the main
chamber to serve as a yard gully or for ventilation.
According to a third modification the waste enters the main trap underneath the
waterline the grid being in this case made solid over the main chamber and open for
the purpose of ventilation or for the admission of surface water over the inlet.
According to a fourth modification the inlet is trapped by simply providing an
independent water seal at the inlet to main trap.
In either of these modifications the traps can be made with or without the grease
float and adjustable outlet and can be made in one or any number of parts as may be
found most desirable.
Openings for ventilation or inspection can also be provided at outlets if required.

page_text: I HENRY DEAN of 95 Guilford Street Russell Square London in the County of
Middlesex Surveyor do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and by the
following statement:—
It relates to certain improvements in the construction of Traps for the disconnection
of Sink, Bath or other waste pipes and in Grease Traps and Gullies being to somo
extent improvements upon my Patented invention No. 849 A.D. 1873. It consists
chiefly in so arranging the component parts thereof as to form a Trap or Gully which
when placed to receive the discharge from such waste pipes, no sewer gas from the
drain or smell arising from any deposit that may be in the body of the trap can enter
the house or building by such waste pipes also as to facilitate the interception and
removal of grease or fat and mud silth and other deposit.
These Improved Traps may be made of Stoneware or other suitable material and of
the Shapes shewn in Drawings or of any other approved shape and of various sizes
depending upon the requirements. They consist of several modifications which are
illustrated on the accompanying Sheets of Drawings.
Figs. 1 and 2 represent one such modification being what I designate a circular
Grease Trap. The lower portion of the Trap A A is similar in construction to the
lower portion of my Patented Invention No. 849, A.D. 1873. The upper portion B B
is of larger diameter having a shallow well C around the interior of the same and is
provided with a projection D at the bottom which fits into the collar of the lower
portion. This is similar to the lower or fixed part of a bell Trap. It is provided
with one or more inlets E E. F is the cover to the woll C having a circular dip H so
arranged that when the cover rests upon the collar of the Trap provided for that
purpose it dips into the water in the well thus trapping the inlet or inlets. If required
this cover can be provided with a hopper J to direct any discharge from the surface
away from the inlet Traps. K is the grid which can be cast in one piece with the
cover if required. In lieu of this grid a solid cover can be provided or a raised
grating so arranged as to afford ventilation without admitting water from the surface.
Lis the grease float or receiver made preferably of wood the rim or band M being of
zinc or other thin metal if found desirable. It is of a little less diameter than the
internal section of the Trap leaving sufficient room for the waste running down the
inner face thereof to enter the water in such Trap between such float and the Trap.
Or it may be made of the same size as the inside diameter of the Trap or as near
approaching thereto as will permit it to work freely within same with an opening in
the centre for the admission of the waste as indicated by dotted lines. N is a handle
for removing same. This receiver can either be made to float on the surface of the
water in the Trap or to rest upon a ledge or ledges provided for the purpose around
the internal face of the same at or near the water line.
The waste from the scullery or other inlets after passing under the dip H forming
the inlet Trap will flow down the internal face of the main Trap, around or through the
centre of the grease float into the water, the grease or fat will immediately rise to the
surface underneath and within the float and the silth or mud into the receptacle
provided at the bottom of the Trap for that purpose both of which can be removed

page_text: emptied and replaced when required. The cover and dip forming the inlet Trap can
also be removed at any time it may be found necessary to clean out the well. The
Float protects the head of grease on the surface and prevents its being disturbed by
subsequent discharges.
Figs. 3 and 4 illustrate a second modification of my improvements. A is the
external portion or body of the Trap which consists of two chambers divided by the
partition B, the first or inlet chamber having one or more inlets for the connection of
waste pipes. His a dip reaching a little below the water line in such chamber thus
effectually sealing the inlet or inlets. J is the outlet pipe and L an opening for
ventilating pipe. The second or main chamber is of the same or similar construction
to that of my Patented Invention No. 849, A.D. 1873. K is the Grid which is made
as an open grating over the main chamber to serve for ventilation or for the admission
of surface water and solid over the inlet chamber to prevent water or anything from
the surface falling into or interfering with the same.
The waste entering the Trap by the inlet or inlets EE flows down under the seal H
through aperture M into the main chamber and from thence under seal N through
outlet J into flush tank or sewer. By removing the grid both inlet and outlet Traps
are accessable and any silth or other matter can be easily removed as before described.
If required the outlet can be placed as indicated by dotted lines at O instead of
as shewn.
.
Figs. 5 and 6 illustrate a third modification of my improvements the outer portion
or body of the Trap is of similar construction to that as described in the last named
modification B is a partition dividing the same into two chambers. H is the Dip
sealing the inlet or inlets E E J is the outlet and R the Grease Float or receiver
which is of similar construction to the one already described in the first modification
except that it is square or rectangular instead of circular and covers the whole area of
the surface of the water in the Trap.
The waste entering the inlet or inlets flows under the dip H from thence over part S
into small chamber Twhich communicates with main Trap by an aperture or opening V
underneath the grease float the effluent flowing under the outlet seal W to the flush
tank or sewer the arrangements for the removal of grease and silth being the same as
already described in the first named modification. The cover in this case may be
made solid over the main and grease chamber and open to serve for ventilation and the
admission of surface water over the inlet chamber.
Fig. 7 illustrates a fourth modification of my improvements which is a trap
constructed upon the lines of my Patented Invention No. 849 A.D. 1873, supplemented
by an independently trapped inlet E and with an adjustable outlet X. This outlet is
made in a separate piece fitting into a collar provided for the purpose and can be
adjusted and fixed in any required direction.
Either of these modifications may have grease floats or adjustable outlets and can be
made in any number of parts as may be found most desirable.
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.<
Firstly. The general construction of Traps and gullies whereby the principles of my
patented invention No. 849, A.D. 1873, are supplemented by an independent trapped
inlet or inlets substantially as above described and as illustrated on the accompanying
sheets of Drawings or any mere modification thereof.
Secondly. The construction and application of a grease float or receiver to facilitate
the interception and removal of grease substantially as described and illustrated or any
mere modification thereof.