IMPROVEMENTS IN COMBINATION STENCH TRAPS
Year: 1882

page_text: LETTERS PATENT to Richard Pearson of Kingston upon Hull in the county
of York for an invention of IMPROVEMENTS IN COMBINATION STENCH TRAPS.
PROVISIONAL SPECIFICATION left by the said Richard Pearson at the
Office of the Commissioners of Patents on the 8th March 1882.
RICHARD PEARSON of Kingston upon Hull in the County of York
MENTS IN COMBINATION STENCH TRAPS
دو
"IMPROVE-
This invention is designed to form a double trap the first of which may be of
smaller capacity than the second and serves to flush it out. I prefer to form it in
one casing, the division between the two forming the lip over which the water
from the first trap flows into the second and suitable partitions are placed in each
and dip into the water in each to form the seal. The top of the first trap is open
or covered with a grating and if the whole trap be sunk in, say the yard, this first
trap serves as an ordinary gully trap. My usual plan is to bring the soil pipe of
one or more closets or other drainage into the second or larger trap which may
either be closed up or open like the other, while wash-hand basins, and particularly
baths discharge into the first or smaller trap, so that upon the bath being emptied,
a strong flush takes place which effectually clears out any deposit which may have
formed in the second trap-a very important advantage.
The bath waste pipe by going into the first trap has of course two seals between
it and the drain, and also the first trap being open to the air it is practically all
but impossible for any foul gases to enter the house through the bath or basin
waste pipe which may either be connected with the trap or stop short above and
discharge through the grating on top. By placing this grating underneath a tap,
the dripping will serve to keep the trap well filled. Suitable lids or handholes are
provided to give access to the interior and the grating may be loose.
I do not bind myself to any special shape so long as the important features are
maintained and the materials ordinarily employed for traps may be used in
constructing these, such as iron, the ordinary drain-pipe ware and so forth.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Richard Pearson in the Great Seal Patent Office on the
8th September 1882.
RICHARD PEARSON of Kingston-upon-Hull in the County of York " IMPROVE-
MENTS IN COMBINATION STENCH TRAPS."
This invention is designed to form a double trap the first of which may be of
smaller capacity than the second and serves to flush it out. I prefer to form it in
one casing, the division between the two forming the lip over which the water
from the first tap flows into the second, and suitable partitions are placed in each,
and dip into the water in each to form the seal. The top of the first trap is open
or covered with a grating and if the whole trap be sunk in say the yard this first
trap serves as an ordinary gully trap. My usual plan is to bring the soil pipe of
one or more closets or other drainage into the second or larger trap which may
either be closed up or open like the other, while wash hand basins, and particularly
baths discharge into the first or smaller trap so that upon the bath being emptied,
a strong flush takes place which effectually clears out any deposit which may have
formed in the second trap, a very important advantage.
The bath waste pipe by going into the first trap has of course two seals between
it and the drain, and also the first trap being open to the air is practically all but
impossible for any foul gases to enter the house through the bath or basin waste pipe
which may either be connected with the trap or stop short above it, and discharge
through the grating on top. By placing this grating underneath a tap the dripping
will serve to keep the trap well filled. Suitable lids or hand holes are provided to
give access to the interior and the grating may be loose.
I do not bind myself to any special shape so long as the important features are
maintained, and the materials ordinarily employed for traps may be used, in
constructing these, such as iron the ordinary drain pipe ware, and so forth.
Reference being had to the accompanying drawings in which like letters of
reference represent like parts. Figure 1 is an elevation Figure 2 a vertical section
and Figure a plan of the invention which will best be understood from the
section Figure 2 A is the first trap and is divided from the second trap B by the
partition C; a diaphragm D dipping into the water in A cuts off the communi-
cation between B and the upper part of A, whilst a second diaphragm E answers
the same purpose between the outflow and drain F and the upper portion of B-
The cover G can either be cemented tight on or can be left loose for inspection or
cleaning or it can be a second grating, similar to H which covers A-The top
edges I are by preference raised above the general level of the trap and bevilled,
and form with the grating H, when the trap is sunk into the ground, an ordinary
gully trap or yard gully, but provided of course with the additional trap B-
K shows the entrance of one or more soil pipes or the like and L that of one or more
waste pipes from baths, sinks, etc. It will be seen that a large flush such as that
from a bath entering at passing under the diaphragm D and over the lip of the
partition C into B, then under diaphragm E and out at F as shown by the arrows
will cause a great rush of water through B and wash out the soil which may
have collected therein. With this trap it is highly improbable that any foul gases
can enter the house through the waste pipes which open into it.
Having now described my invention and the method of performing the same I
wish it to be understood that what I claim and desire to protect under the herein-
before in part recited Letters Patent is ;
First The hereindescribed double stench trap so arranged that the flush of

page_text: water from the first chamber passes through the second chamber and cleanses it
substantially as set forth and shown
Second-The combination with the hereindescribed double stench trap, of the
grating H whereby the first chamber is ventilated and the trap can be employed
as a yard gully substantially as set forth and shown.
Third The hereindescribed double stench trap in which the closet soil pipe
is introduced between the first and second water seals, and the chamber into
which said soil pipe discharges is cleansed by the flush from the first chamber
substantially as set forth and shown.
In witness whereof I the said Richard Pearson have hereunto set my
hand and seal this seventh day of September in the year of Our Lord One
thousand eight hundred and eighty two.
RICHARD PEARSON.
(LS.)