Improvements in Syphon stench traps
Year: 1889

page_text: Date of Application, 30th Jan., 1889
Complete Specification Left. 11th Mar., 1889
Complete Specification Accepted, 13th Apr., 1889
I, EDWARD SMITH, Manufacturers Agent, of 8 Brook Street, Bradford, in the
County of Yorks, do hereby declare the nature of this invention to be as follows:-
Improvements in Syphon stench traps, applicable for carrying away water from
sinks, &c., to waste and other pipes and to drains; and to prevent the escape of
noxious gases from such pipes or drains.
My invention relates to that kind of Syphon trap which is made with partitions,
for fixing to sinks wash-basins and baths or, for fixing beneath Urinal and Street
drainage grates, and consists in the following arrangements.
My trap for Scullery sinks wash-basins and baths is made of metal or earthenware,
preferably circular in cross section (but I do not confine myself to this or any shape)
and with vertical or nearly vertical sides. Round the outer edge of the open top I
provide a rim or flange to support it to the sink, wash-basin or bath.
About two-thirds of the lower part of the trap is rounded so as to form a bottom,
the other part being somewhat prolonged and left open. An upward projection from
this rounded bottom forms a basin in the part of the trap with the bottom, and also
forms, in conjunction with a downward projection from the said bottoni and the
prolonged part of the trap, the outlet or long leg of the syphon, the end of which I
generally work to a rounded form when the trap is made of soft metal. An over-
lapping lip or partition is fixed, with its upper part joined to the outlet side of the
trap near the top, and its lower edge on a lower level than the top of the upward
projecting partition, and at such a distance from the said upward projecting
partition as to leave space sufficient for the exit of all the water which enters
the top of the trap excepting what is retained by the depth of the part which
forms a basin, the water thus retained forming a seal and preventing the escape of
gases from the pipe or drain to which the trap is attached. In order to dispense with
a cleansing hole I make the space between the lower edge of the overlapping partition
and the rounded bottom, less than the space between such overlapping partition and
the upward projecting partition, and thus prevent any substance from getting into the
syphon part of the trap which could block it up. I fix the overlapping partition as
near the top of the trap as is convenient so that the depth of it is reduced as much

page_text: as possible thus rendering it an easy matter to clean out the trap from the top without
drawing of the water which forms the seal and thus preventing the escape of the
noxious gases from the waste pipe or drain during the cleansing process. I provide
the trap which I use for scullery sinks with a recessed edge round its inside near the
top, into which is fitted an ordinary straining grate, but in the trap which I use for
wash-basins and baths, this recessed edge is made deeper, and in addition to the
straining grate I provide a packing ring, and a valve or lid to rest upon such ring
above the grate. I also provide the trap, which I use for wash-basins and baths
which have an overflow pipe, with a hole near its top edge on the opposite side to the
outlet, into which the end of such overflow pipe is fitted.
The trap for fixing beneath Urinal and street drainage grates is made suitably large
and generally square or oblong in cross section, with a greater depth proportionately
to its width or length than the trap I use for scullery sinks &c., and is made without
carrying the overlapping partition downward to the same extent, the part with the
bottom thus forming a box or pan of the ordinary description for retaining the
sediment which flows into the top of the trap with the water; and the long leg or
outlet of the syphon forming a ready means of connexion with the drain or drain
pipe. This trap is also provided with an ordinary flange round its outer edge at the
top to improve it in strength and appearance.

page_text: Improvements in Syphon Stench Traps.
1, EDWARD SMITH, Manufacturers Agent, of 8 Brook Street, Bradford, in the
County of Yorks, do hereby declare the nature of this invention and in what manner
the same is be performed, to be particularly described and ascertained in and by
the following statement :-
My invention relates to that kind of Syphon trap which is made with partitions,
for fixing to Sinks, Wash-basins and Baths and for fixing beneath Urinal and street
drainage grates, for carrying away water or other fluid to waste pipes and drains and
to prevent the escape of noxious gases therefrom, and consists in the following
arrangements
My traps are made of metal or earthenware and are generally moulded or cast by
the ordinary known methods, but when I make my trap for scullery sinks &c., of
lead I prefer to cast the shell with the upward projecting partition and then to saw or
cut into such shell a nick of the required shape and insert into this nick edgeway a
shaped piece of zinc or other metal for the purpose of forming the overlapping
partition which is then fixed by filling in the nick round the outside of the shell with
solder.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which Figure 1 is a sectional
elevation of the trap I use for attaching to scullery sinks in which a a a¹ a² is the
shell of the trap, and a³ the upward projecting partition which forms a division
between the box part of the trap and the outlet part. bis the overlapping partition
which I sometimes make of a separate piece of metal and slot edgeway into a nick of
the same shape made in the shell of the trap as shewn at 61, the said nick being
afterwards filled with solder. C is the straining grate resting upon the recessed
edge a³ a³, a¹ a¹ is the flange for supporting the trap to the sink. a¹ is the bottom of
the trap-box which I prefer to make rounded. a² a² is the outlet which I generally
make to taper from the part d to a somewhat rounded form as shewn at d¹ figure 2
which is a cross section of the bottom of this trap. By working out the flat side d²
to the dotted lines a better shape is provided for attaching the waste pipe to it.
Figure 3 is also a cross section of the bottom of this trap shewing how I sometimes
make the upward projection a³ and the downward prolongation a² (Figure 1) curved
so as to provide at once a suitable outlet for attaching the waste pipe to it. Figure 4
is a sectional elevation of the upper part of the trap shewn in figure 1, with valve
arrangement making it applicable for wash-basins baths and such like purposes. a as
is the recessed edge bearing the straining grate C with packing ring F F resting upon
it. E is the valve or lid resting upon the packing ring and E is a ring or knob for
lifting the valve from its seating. a a is the flange for supporting the trap to the
wash basin &c. The dotted line as shews where I provide a hole for inserting the end
of the overflow pipe. Figure 5 is a sectional elevation of my trap modified in form,
which is made suitably large for fixing beneath Urinal and Street drainage grates.

page_text: G is the prolonged trap-box for retaining the rubbish which flows into the trap with
the water or otherwise, and H is the flange for strengthening the top of the trap and
which is also suitable for bearing the grate.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In the construction of partition box-traps applicable for sinks &c., fixing the
overlapping partition immediately below the open head of the trap substantially as
described and illustrated at figures 1 and 5 of the accompanying drawing.
2. In the construction of sinks &c. traps, inserting and fixing a separate piece of
metal to form the overlapping partition substantially as described and illustrated at 6¹
figure 1 of the accompanying drawing.
3. In the construction of Stench traps the application and adaptation of the valve E
and packing ring F above the straining grate substantially as described and illustrated
at figure 4 of the accompanying drawing.
Dated this Oth dow of Mach 1980