Improvements in and in the Method of Producing Drainage or Sewerage Traps.
Year: 1897

page_text: Improvements in and in the Method of Producing Drainage or
Sewerage Traps.
I, WILLIAM CROWTHER, of Long Lane, Harden, near Bingley, in the County of
York, Moulder, do hereby declare the nature of this invention to be as follows,
that is to say:
-
It relates to the construction of drainage or sewerage traps of the class used
in connection with sinks, gulleys or the like and the method whereby they may
be produced so that, the cost of their said production is comparatively little while
their efficiency for the purposes for which they are designed is greatly enhanced.
The class or kind of trap to which mine relates consists of a main cistern box
or cavity which is divided by vertical and horizontal partitions so that two
distinct and separate cavities are thus formed.
One of these cavities is further divided by a partition which extends upwards
to within a suitable distance from the horizontal partition of the other cavity
and from one side of this semi-partition and close to the bottom thereof an opening
leads through the main partition into the other part of the cistern, while another
opening on the other side of said semi-partition feads to the drainage pipe as will
be well understood, by which means any liquid poured into the main cistern first
enters the uncovered part thereof, passes through the opening at the side of the
main partition into the cavity adjoining the semi-partition over which it flows
to finally pass away through the drain pipe. The trapping being thus effected
by the liquid lodging in the main cistern and the cavity adjoining the semi-
partition, the upper edge of this latter being higher than the top of the opening
or passage between the two cavities.
By the trap being thus formed and by an opening being made in the horizontal
partition which thus leads to both the cavities adjoining the semi-partition, any
refuse, dirt etc., which might lodge therein can be readily removed, while the
opening formed for these cleaning purposes may be covered or stopped by a screwed
cap or otherwise as will be well understood.
In producing traps by following the method of construction as above described,
I am enabled to cast them all in one part, complete and of any desired class of
metal. However when lead or other comparatively soft metal is employed which
is the case in the production of most "sink traps," I form an outer chill or mould
of the desired shape and a correspondingly formed chill or mould to fit within
it. When these are placed together in order to form the other cavities in the
cistern I use a sand or like core which is suitably shaped so that I can mount it
in the chills, together with any fittings, such as the screwed part for the brass
or like cap or plug in order that when the molten metal is then poured into the
CD 077

page_text: mould thus formed when taken therefrom a perfect "trap" is produced, the sand
core being readily extracted in the well known manner.
Dated this 18th day of September 1897
WILLIAM CROWTHER.
Per Samuel Hey,
Agent.
Improvements in and in the Method of Producing Drainage or
Sewerage Traps.
I, WILLIAM CROWTHER, of Long Lane, Harden, near Bingley, in the County of
York, Moulder, 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, that is to say:-
It relates to the construction of drainage and sewerage traps of the class used
in connection with sinks, gulleys or the like and the method whereby they may
be produced, so that the cost of their said production is comparatively little while
their efficiency for the purposes for which they are designed is greatly enhanced.
In order that my said invention may be readily understood, I have hereunto
appended a sheet of drawings illustrative thereof, in which: --
Fig. 1 is a sectional elevation of a sink trap made in accordance with this
invention.
Fig. 2 is a view of same as seen from above with the grate removed.
Fig. 3 is sectional elevation on line A-B of parts shown by Fig. 2 and viewed
in the direction indicated by arrow .
Fig. 4 is a sectional view taken on line C-D of Fig. 2, and as seen in the same
direction as is Fig. 3.
Fig. 5 is a sectional plan taken on line E-F of Fig. 4.
Similar letters and figures of reference indicate similar parts throughout the
several views.
The class or kind of trap to which my invention relates consists of a main
cistern, box or cavity which is divided by vertical and horizontal partitions a
and b so that two distinct and separate cavities a²d are thus formed.
The cavity d is further divided by a partition e which extends upwards to
'within a suitable distance from the horizontal partition b and from one side of this
semipartition e and close to the bottom thereof an opening a¹ leads through the
main partition a into the other part as of the cistern while another
opening on the other side of said semipartition e leads to the drainage
pipe as will be well understood, by which means any liquid poured into the main
cistern first enters the uncovered part a² thereof, passes through the opening a¹ at
the side of the main partition a into the cavity 62 adjoining the semipartition e
over which it flows into the cavity 61 to finally pass away through the drain pipe.
The trapping being thus effected by the liquid lodging in the part as of the main
cistern and the cavity badjoining the semipartition e, the upper edge of this
latter being higher than the top of the opening or passage a¹ between the two
cavities a and 68.
By the trap being thus formed, and by an opening f being made in the
horizontal partition 6 which thus leads to both cavities 61 and 62 adjoining the semi-
partition e, any refuse, dirt, etc., which might lodge therein can be readily removed,
while this opening f may be covered or stopped by a screwed cap 9 or otherwise
as will be well understood.

page_text: In producing traps by following the method of construction as above described,
I am enabled to cast them all in one part and complete, of any desired metal.
However, when lead or other comparatively soft metal is employed which is the
case in the production of most "sink traps," I form an outer chill or mould of
the desired shape, and a correspondingly formed chill or mould to fit within it.
When these are placed together, in order to form the cavities 6 and 68 in the
cistern I use a sand or like core which is suitably shaped so that I can mount it
in the chills, (together with any fittings such as the screwed part g¹ for, the brass
or like cap or plug g, as also the nut h into which takes the screw for fixing the
grate or grid to the trap) in order that when the molten metal is then poured
into the mould thus formed, a perfect "trap" is produced, the sand core being
afterwards readily extracted from the moulded trap in the well known manner.
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. A trap having cavities and partitions formed and arranged relatively with
each other substantially as herein specified.
2. Traps having cavities and partitions formed and arranged as described with
openings to afford access to such cavities substantially as specified.
3. Traps having cavities, partitions and openings together with caps or covers
and grids for taking over said openings substantially as herein set forth and
described.
Dotad this 18th dow of Tune 1800