Year: 1888

page_text: I WILLIAM BARTHOLOMEW, of the firm of B. Finch and Company, of 82 Belvidere
Road, Lambeth, in the County of Surrey, Sanitary Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improvements in water closets whereby I obtain all the
advantages of a valve closet as regards the depth of water remaining in the
basin as an after-charge, without the disadvantage of a valve or any moving part or
mechanism.
My improved water closet consists of an earthenware basin of a hopper form,
under which is placed two water traps or seals, which can be made in one, two, or
more pieces of pottery, as may be desired. In any convenient place in the air space
between the two water traps I provide a small opening for escape of air as hereinafter
described. Water is supplied to the closet through an arm in the usual manner in
conjunction with a cistern or water waste preventer of the siphon kind, having an
after-charge compartment cast under in the manner usual for such fittings. The
cistern is provided with a bent tube, one end of which dips nearly to the bottom of the
cistern and can be either open or closed with a flap valve.
The action of the closet is as follows:
When the chain which
The cistern is filled by a ball valve in the usual manner.
brings the siphon in action is pulled, the contents of the cistern are discharged down
a pipe to the closet, some portion of the water entering the chamber cast under the
tank through suitable slots, and the water rising to a high level in the basin; at this
moment the end of the bent tube is uncovered and the compressed air between the
two water traps escapes through the opening provided for that purpose into the
atmosphere. This cushion of air between the two traps being removed, the head of
water fills up the space previously occupied by the air and so sets up a siphon
action, the outlet of the closet being connected to a soil pipe outside the
building.

page_text: The contents are thus sucked out of the basin and into the drain; the contents of
the after-charge compartment then pass through a hole down the discharge pipe
into the basin until it reaches the desired water line and the closet is again ready
for use.
Where it is inconvenient to use a cistern in proximity to the closet I may operate
as above described by means of a valve under the seat in lieu of the siphon action, the
basin arrangement remaining the same.
Improvements in Water Closets.
I, WILLIAM BARTHOLOMEW, of the firm of B. Finch and Company, of 82 Belvedere
Road, Lambeth, in the County of Surrey, Sanitary Engineer, 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 to improvements in water closets whereby I obtain all the
advantages of a valve closet as regards the depth of water remaining in the basin
as an after charge without the disadvantage of a valve or any moving part or
mechanism.
On the accompanying Drawings:
Figure 1 is a side elevation of a closet embodying my improvements.
Figure 2 is a sectional elevation through the centre of Fig. 1.
Figure 3 shows my improved siphon cistern detached from closet, and
Figure shows the entire combination of my improved water closet; similar
letters of reference indicating similar parts in each of the figures respectively.
My improved water closet consists of an earthenware basin of a hopper form, A,
under which is placed two water traps or seals, B and C, which can be made in one,
two, or more pieces of pottery, as may be desired. In any convenient place in the
air space between the two water traps 1 provide a small opening, D, for escape of
air as hereinafter described. Water is supplied to the closet through an arm, E, in
the usual manner in conjunction with a cistern or water waste preventer of the
siphon kind (such as at Fig. 3) having an after charge compartment, F, cast under

page_text: in the manner usual for such fittings. The cistern is provided with a bent tube, G,
one end of which, g, dips nearly to the bottom of the cistern and can be either open
or closed with a flap valve.
The action of the closet is as follows:-
The cistern is filled by the ball valve H in the usaal manner; when the chain which
holds the siphon in action is pulled the contents of the cistern are discharged down
the pipe I to the closet, some portion of the water entering the chamber F, cast under
the tank, through suitable slots, or by the lifting of the valve K, as may be preferred,,
and the water rising to a high level in the basin, as indicated by the dotted line L;"
at this moment the end g of the bent tube G is uncovered and the compressed air
at M, between the two water traps B and C, escapes through the opening D provided
for that purpose, into the atmosphere. This cushion of air at M between the two
traps being removed, the head of water fills up the space previously occupied by the
air and so sets up a siphon action, the outlet of the closet being connected to a soil pipe
outside the building.
The contents are thus sucked out of the basin and into the drain; the contents
of the after charge compartment F pass through the holef down the discharge
pipe I into the basin until it reaches the desired water line K, and the closet is
again ready for use.
Where it is inconvenient to use a cistern in proximity to the closet I may operate
as above described by means of a valve under the seat in lieu of the siphon action,
the basin arrangement remaining the same.
1 desire it to be understood that I may use my improved water closet with any
form of cistern or water waste preventer of the siphon kind provided with my bent
tube G, or its equivalent.
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 water closet having a basin (A) with two water traps (B, C,) so arranged in
relation to each other as to leave between them an air space (M) having an opening (D)
through which the air will escape when the end of the pipe (9) is uncovered in cistern
when discharging, substantially as described.
2. A cistern or water waste preventer of the siphon kind having a bent tube (G)
in connection with an air opening (D) in the water closet in such a manner that when
the pipe end (9) of the bent tube is uncovered during the discharge it permits escape
of air at D, substantially as described.
3. A water closet constructed, combined, and arranged to operate substantially as
hereinbefore described.
Dated the Nimatrauth dow of November 1888