Improvements in Water Closets.
Year: 1899

page_text: Improvements in Water Closets.
I, HENRY LEWIS DOULTON, of the Lambeth Sanitary Engineering Works,
Lambeth, in the County of Surrey, Potter, do hereby declare the nature of this
invention to be as follows:
This invention has for its object the more efficient discharge of liquids and
matter from closet basins by syphonic action. The closet basin is provided at its
base with a trap the outlet pipe from which turns downwards & dips into the
seal of a second trap. A junction is made between the second trap and the outlet
pipe at a convenient distance above the water seal, sufficient space being left
immediately below this joint to form an air compartment which may be ventilated
if desired. From the water supply pipe to the closet basin, a pipe is carried down-
wards and communicates with the air compartment, a branch being arranged in
it to afford a passage to the upper end of the outlet pipe already mentioned. In
action, part of the water from the supply pipe descends the pipe attached to it and
in doing so draws the air through the branch pipe from the pipe between the
traps tending to create a vacuum which the water from the closet basin fills & thus
sets up a syphonic action. The closet, traps, and pipes may be made in pottery or
iron or a combination of both or of other suitable material and in one or more
pieces.
I, HENRY LEWIS DOULTON, of the Lambeth Sanitary Engineering Works,
Lambeth, in the County of Surrey, Potter, 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:-
This invention has for its object the more efficient discharge of liquids and
matter from closet basins by syphonic action.
Drawings Nos. 1, 2 & 3 shew the general arrangement.
The closet basin A is provided at its base with a trap B, the outlet pipe C from
which turns downwards and dips into the seal of a second trap D. A junction E
is made between the trap D, and pipe, C, at a convenient distance above the water
seal in trap D. Sufficient space being left immediately below the joint E to form
an air compartment which may be ventilated if desired. From the water supply
[Prise 8dl

page_text: pipe (G) to the closet a pipe H is carried downwards and communicates with air
compartment F, a branch J, being arranged in it at J, or other part to afford a
passage to the pipe C. In action part of the water from the supply pipe G,
descends pipe H, drawing air by branch J, from pipe C, tending to create a vacuum
there which the water from the basin fills and thus sets up a syphonic action.
In place of the supply valve a water waste preventing or other cistern may be
used. In such case the cistern outlet and closet inlet are connected as usual. In
the cistern an independent syphon K is fixed and connected to a valve L the outlet
from these is continued downwards to the pipe H. When the lever M is pulled
for flushing the closet, it lifts also the valve L and draws also the water through
syphon K. The water descends and passes through pipe H with the result
described before.
The tap D, may be a continuation of pipe C, if desired and the parts immediately
connected with the closet may be of one or more pieces.
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. In water closets the discharge of liquid and matter from the basin by
syphonic action induced by the withdrawal of air from the outlet pipe of trap by
the suction of water passing in a second pipe communicating with the outlet of
trap substantially as described.
2. Closet fittings substantially as described and shewn on drawings Fig. 1 and 2.