Improvements in Water Closets or Water Closet Basins..
Year: 1892

page_text: Date of Application, 29th Dec., 1892:
Complete Specification Left, 31st Aug., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Water Closets or Water Closet Basins..
I THOMAS WILLIAM TWYFORD of Cliffe Vale Pottery, Hanley, in the County
of Stafford, Manufacturing Sanitary Potter, do hereby declare the nature of this
invention to be as follows:-
This invention relates primarily to wash-out closets, and has for its object, the
more efficient cleansing of the basin or pan of the same, and its accessory parts,
particularly the trap, and its mouth entrance.
My said invention consists primarily in choking or contracting the mouth entrance
to the trap, in manner that a syphonic action is obtained within the said trap, hence
the rapid and efficient removal of soil and other accumulations consequent upon, or
in virtue of, a partial vacuum being obtained.
The mouth entrances to ordinary traps are of a greater bore or larger in diameter
than the said traps, in consequence of which, air can freely pass therethrough with
the flush, and by so doing, the necessary displacement of soil is only due to the
head of water employed.
Now if a greater outside pressure can be brought to bear upon the flush and soil
passing through the trap, than there is in the inside, a suction or syphonic action.
will be obtained, much greater in effect than that produced by a considerable head
of water. So from this it will be understood that a more efficient flushing or
removal of the soil is obtainable with a small and given quantity of water passing
through a choked trap entrance, than can be obtained by a much greater quantity
of water passing through an open entrance, and further, the paper used acts as a
wiper or plug for removing discolorations or attached soil commonly found upon
the walls contiguous to the enlarged open entrances to the traps.
In carrying out my invention, I take an ordinary wash-out pan or basin
preferably of the pedestal type, and of the well known "Unitas" construction, and
with the mouth entrance to the trap, choked, gathered in or contracted to a less
bore than that of the trap itself, or of the outside approaches to the same.
Thus the walls of the basin or pau are supported by a skirting or pedestal part,
wherein the trap is located, and which trap has its mouth entrance throttled or
choked to an extent sufficient for the passage of the soil, and to create the necessary
syphonic action within the trap.
The pan approaches to the said choked entrance are preferably flared or made.
hopper shaped, so that when the paper and soil upon the pan are forced by the
flush into the conical space forward of the flare, the said soil and paper form au
obruction, and hinders the passage therethrough, until the early part of the flush,
which is passed through the trap, rarifies the air within it, hence the production of
a greater outside pressure, which then acts upon and forces the accumulated soil
and paper as a plug through the trap, and incidentally in its passage, not only
cleans the approaches and walls to the same, but also removes all accumulations,
and leaves behind it, uncontaminated and clean water, coming only from the after
flush.
Instead of the mouth entrance or inlet to the trap being choked, I may choke or
contract the outlet, to an extent sufficient to produce the syphonic action, but in.
this case instead of the soil and paper being forced plug-like through the trap, the
same is sucked or drawn, and which has the same, or nearly the same, effect.
-Dated this 28th day of December 1892.
THOMAS WILLIAM TWYFORD,
By Henry Skerrett,
Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Water Closets or Water Closet Basins.
I, THOMAS WILLIAM TWYFORD, of Cliffe Vale Pottery, Hanley, in the County
of Stafford, Manufacturing Sanitary 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 relates primarily to improvements in the traps of water closets or
water closet basins, and has for its object, so constructing the said traps that the
same become self-cleansing during use or during the operation of flushing, and this
I accomplish by choking the bore at the entrance to, or at various points within,
the trap and also by flaring the entrance to the first and primary contraction.
By so providing and contracting the bore of, or the passage through, the trap at
points, a syphonic action is created during flushing by the paper and soil forming
temporary obstructions or blockings at the chokes.
Thus, assuming the said trap passage to be choked at the entrance, and at points
removed from the entrance, then the soil and paper with water, in their passage
through the trap, rarify the air between the chokes, hence the creation of a greater
pressure outside the trap than there is within, and which outside excess pressure
forces the said water and accumulations with considerable velocity and rush through
the system into the soil pipe.
By attaining an increased outside pressure by the partial choking of the bore of
the soil pipe at points and the consequent rarification of the air in the trap, and
the production of a syphonic action thereby, the walls of the closet, and also the
inside walls of the trap are self-cleansed by the obstructions acting as wipers or
plugs.
Figure 1 of the accompanying drawing represents in vertical section, a wash-out
water closet, with the bore or passage of the trap choked or contracted at points
according to my invention.
Figure 2 represents a topside plan of the same, but with the fore part shown in
horizontal section upon the dotted lines A B Figure 1. This view shows the flared
and hopper shaped entrance to the first choke of the trap.
Figure 3 represents a transverse section of the said water closet upon the dotted
lines CD Figure 1 and looking upwards, or in the direction indicated by the arrow.
in the said Figure 1.
a is the basin, b the rim, c the neck and d the after-flush. 9 is the trap of a
syphon construction, enclosed or encompassed by the pedestal or skirting walls h,.
which act both as a screen for hooding up the said trap, and also as a support or
pedestal for the basin.
Now the entrance to the trap g, which is choked at g', is flared or hopper shaped
at g, whilst the inside bore at the middle crown g', of the said trap is also choked
at 9, and further, the dip 98, is also choked at 9.
Thus the outlet g', leading to the soil pipe, and also the parts lying between the
chokes as aforesaid are of greater diameter than the said other parts.
I wish it to be understood that the choke bore may be at the entrance to the
trap, instead of at three points as described, and I further wish it to be understood
that instead of the chokes being at the points as indicated, they may be at other
suitable points without departing from the object and nature of my invention.
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 :-
First. In water closets or water closet basins, choking, throttling or contracting
the entrance to the bore of the trap of the same, or throttling or contracting the
bore or passage of the said trap at intermediate points, whether the trap be formed

page_text: integral with the said closet or basin or made separate and fitted, substantially as
and for the purpose as described and set forth.
Secondly. In water closets or water closet basins, making the entrance to a
choke-bore trap flared or hopper-shaped, substantially as described and set forth.
Dated this 30th day of August 1893.
THOMAS WILLIAM TWYFORD,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicant.