IMPROVE- MENTS IN GULLY TRAPS to be as follows:
Year: 1884

page_text: I, THOMAS DURRANS, Architect, of Upper Baker Street, in the County of
Middlesex, c/o Day, Davies & Hunt, Patent Agents, 321, High Holborn, in the
County of Middlesex, do hereby declare the nature of my Invention for "IMPROVE-
MENTS IN GULLY TRAPS to be as follows:-
:-
"
This Invention relates to improvements in gully traps, a special feature of
novelty consisting in the application of a removable box or receptacle forming the
dip-trap and seal, and which may also be utilized as or formed or provided with a
strainer or means for catching the grosser solid matters and preventing them from
passing to the bottom of the gully trap, where they are so liable to remain and
to choke up the gully and prevent its proper working; and which also avoids the
necessity for any fixed or other form of dip as hitherto used, and when removed
gives free access to the gully and drain pipe for being cleaned and for removing
any obstruction.
The improved gully is generally applicable in all such places where like devices
are at present used, and it may be made of glazed stoneware, iron, lead, or other
suitable materials, and of a circular, square or other desired shape.
The outlet from the gully is formed in such a manner that through access can
be had to it from the inlet to the gully, upon the removal of the usual grating and
the said dip-trap. The mouth of the gully is formed in the usual manner for the
reception of a removable grating, immediately below which it is formed with an
inclined seating or is otherwise equivalently formed so that the said removable
dip-trap box or receptacle can rest thereupon when lowered into or placed in
position, and then prevents the escape of any sewer gas at this part; or in lieu of
this joint or in addition thereto-the upper part of the gully is formed with a grease
or water seal or with an equivalent seal or joint into or against which a depending
rim or part of the said removable dip-trap enters or bears.
The said removable dip-trap is provided with a cross handle by means of which
it can be lifted or replaced as desired, and its upper part is inclined or formed
correspondingly with the said inclined seating or equivalently formed part of the
gully and rests thereon, its interior partaking also of this form, and so catching all
the water which runs into it from the grating, excepting some small portion which

page_text: runs off the bevilled top edge of the said rim and into the said grease or water
seal thus tending to keep this at all times full. The lower part of the said
removable box enters the water in the gully a sufficient distance so that the
entering water can freely pass away, but the sewer gas cannot return or find an
outlet. The bottom of the said box is or may be formed as a strainer, or with one
or more openings, or may be provided with a removable grating, so that where
required the coarser solid matters entering the gully can be retained in this box,
which can be readily lifted, emptied, and replaced; thus facility is provided in an
exhanced degree for ready access to every part of the gully trap.

page_text: COMPLETE SPECIFICATION.
I, THOMAS DURRANS, Architect, of Upper Baker Street, in the County of
Middlesex, c/o, Day, Davies & Hunt, Patent Agents, 321, High Holborn, in the
County of Middlesex, do hereby declare the nature of my Invention for "IMPROVE-
MENTS IN GULLY TRAPS," and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This Invention relates to certain improvements in gully traps, the special
feature of novelty characteristic of the improvements consisting in the application
to gully traps, of a removable receptacle which is adapted to serve as the inlet
for the surface waters, and as an effective dip and seal closing off all escape of
sewer gas from any part of the inlet aperture of the trap, and also if required and
preferably as a means for catching the grosser solid matters and preventing them
from passing to the bottom of the gully trap where they are liable to remain and
prevent the proper working of the gully, in combination with a removable grating
adapted to keep the sealing of the said inlet aperture as thus effected by the
removable inlet, effective, in such an improved manner as to avoid the
necessity in such traps for any fixed or other form of dip other than that or those
provided by such removable inlet and grating, and as to permit of free access to the
gully trap and drain pipe, for cleaning the same or for removing any obstruction,
being obtained by simply removing the said inlet receptacle and grating.
I would remark that I am aware that fixed gully traps have formerly being
provided with removable or suspended inlet receptacles or strainers for collecting
solid matters entering the gully trap and allowing of the escape of the liquid
matter, and in other cases with removable inlets acting as dips, and seals; but as
hitherto constructed all such gully traps have been of such a formation as to
require additional internal fixed or other forms of dips than that or those provided
by such removable part itself, as there has been no other effective provision for
preventing the escape of gas from the drain between the removable inlet and the
gully body when in position in use, and these additional internal dips have of
necessity prevented free access to the gully trap and drain pipe.
It has, however, also been proposed to set ordinary gully traps, that is, gully
traps of a usual construction with a fixed dip in one piece with the gully trap,
removably in a water joint formed by a separate trap frame, with the object of
preventing escape of sewer gas both through the trap and around it, but in such
an arrangement both the gully trap and its said usual fixed dip forming part
thereof are together wholly removable; and, moreover, such an arrangement would
be exceedingly defective on account of there being no provision for preventing
evaporation of the water in the said frame and which would be very speedily
dried up in hot weather, there then being nothing to prevent the free escape of
the gas.
I am also aware that several other descriptions of gully traps have been made
with various kinds of water joints adapted in different manners to effect the said
desired purposes, but the same are all more or less open to similar objections.
I therefore wish it to be understood that I lay no claim to any such arrange-
ments, and that the present Invention consists, essentially, in the application to

page_text: gully traps intended to occupy a fixed position, of a removable receptacle or inlet
serving as an effective dip and seal closing off all escape to the inlet aperture of the
gully trap of sewer gas from the drain both through it and between it and its
seating in the gully, and also, if required, as a means of catching the solid matters
entering the gully trap, in combination with a removable grating adapted to keep
the sealing of the said inlet aperture as thus effected by the removable inlet
receptacle effective, in such an improved manner as to dispense with the former
necessity for any additional fixed or other forms of internal dips forming part of or
adapted to the body of the gully as hitherto user, and so as to allow of the outlet
from the gully body remaining always in through connection with the drain pipe
so that free access can be. obtained to all parts of the interior of the fixed gully
body and to that of the drain pipe in connection therewith, upon simply removing
the said inlet receptacle and grating.
The improved gully trap is generally applicable in all such cases where like
devices are at present used, and it may be made of glazed stoneware, iron, lead, or
of other suitable materials, and of circular, square, or other desired or usual shape
or configuration.
The Invention is illustrated on the accompanying drawings in vertical section in
two modifications of its construction.
In accordance with the present improvements, the outlet 1, from the gully trap
is formed in such a nanner, and is so adapted in relation to the inlet aperture 2, as
that free access can be had to it and to the drain pipe in connection with it from
the said inlet aperture when the latter is open or uncovered or unclosed by the said
removable combined inlet and dip 3, and removable combined grating and dip 4.
The body part 5, of the gully trap is formed without any depending dips or parts
which would obstruct access to its interior or to the drain pipe, so that all parts of
its interior are freely accessible from the said inlet aperture when it is open as
aforesaid; its lower part is so conformed as to afford a means of sealing the outlet
when the said removable combined inlet and dip is placed in position; and its upper
part at or adjacent to its inlet aperture is also formed with means hereinafter more
particularly referred to of effectually sealing the connection between the said
removable inlet and its seating in the gully trap; and by such means all escape of
sewer gas or foul air from the drain pipe is prevented both through the said inlet 3,.
and between it and its seating in the gully trap.
The means of sealing the connection between the said inlet 3, and inlet
aperture 2, of the gully trap, form an important feature of the present improve-
ments, and they consist, essentially, in so constructing the adjacent parts of the
inlet aperture of the gully trap, and of the grating 4, and of the removable inlet,
as to make each of the parts effective in sealing the said connection, either by
forming a double or triple water, grease, or sand joint, and instrumental in
protecting the main joint, and which is especially advantageous in protecting water
joints from evaporation, and in causing the joint to remain effective and practically
without liability to become ineffective.
Two modifications of attaining this most essential object are illustrated on the
accompanying drawings.
In the modification illustrated in Fig. 1, the main joint between the said inlet
receptacle 3, and gully inlet 2, is formed by a channel 6, in the gully, and
depending dip 7, forming part of the receptacle 3, and this joint is protected from
evaporation, on the one side by the water joint formed by a channel 8, in the
receptacle 3, and a depending dip 9, forming part of the grating 4, and on the other
side by the true fitting of the grating 4, on its seating 10; and in the modification
illustrated in Fig. 2, the said joint 6, 7, is protected on the one side by the
joint 8, 9, and on the other side by the water joint formed by a channel 11, in the
gully inlet, and by a depending dip 12, forming part of the grating 4.
The improved channels 6, 8, 11, for trapping the inlet aperture 2, and of securing
the efficiency of the trap are thus situated in such positions as that the depending
dips 7, 9, 12, of the removable receptacle and grating can be directly lowered

page_text: thereinto, these parts being so shaped and disposed as to conform to the adjacent
parts of the trap and inlet respectively.
The improved removable combined inlet, dip, and receptacle 3, is, preferably,
though not necessarily, made of a conical formation, and its lower part enters the
water in the body part of the gully trap a sufficient distance to prevent any return
of sewer gas, leaving, however, sufficient space to allow of the entering water
passing freely away. It is of advantage to make the outlet from the gully trap
with a raised bridge piece 14, as whilst still permitting of free access to the drain
pipe from the said inlet aperture this provision permits of a deeper trap being
obtained without increasing the size of the gully body; and causing the water to
cascade over the bridge piece accelerates the flow down the pipe. The bottom of
the inlet receptacle is preferably perforated or formed as a grating 15, or it may be
provided with a removable grating to catch and retain the coarser solid matters
entering the gully trap, and which can thus be readily removed, thus providing
facility in an enhanced degree for ready access to every part of the gully trap and
for keeping the body thereof clean, without necessitating its removal when once
fixed in position.
The parts adjacent to the inlet are so conformed as that some portion of all
entering water is caused to run into the said inlet traps and keep them at all
times full, and the removable inlet may be provided with a cross handle 16, for
facility of removing it.
Side inlets may also be arranged in conjunction with these traps to receive wash
waters from rain water pipes, sinks, baths, or lavatories, and the gully may also be
used as a strainer or collecting fat trap to prevent fat from scullery sinks entering
the drain pipe. In such modifications the trap would be enlarged and formed with
inlet lugs at the sides or top thereof to receive the entering waste pipes and conduct
the entering water over the top of the removable inlet 3.
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
1. The combination with a gully trap adapted with means of sealing its inlet at
a part or parts adjacent thereto, of a removable receptacle or inlet serving as an
effective dip and seal closing off all escape from the inlet aperture of the gully trap
of sewer gas from the drain both through the said receptacle and between it and its
seating in the gully, and also serving if required as a collector or means of retaining
the entering solid matters, and of a removable grating adapted to keep the sealing
of the said inlet aperture, as thus effected by the inlet of the trap and said
removable inlet, effective; when such parts are formed, combined and co-operate,
substantially in the improved manner herein before described.
2. In a gully trap provided with a removable inlet, dip, receptacle or strainer;
protecting the main joint or seal between said removable part and its seating in the
gully trap from evaporation or from becoming ineffective, by combining therewith,
on each side thereof an auxiliary trap, seal or equivalent joint between the adjacent
parts.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.