Improvements in Syphon Discharge Cisterns.
Year: 1892

page_text: Date of Application, 10th Dec., 1892
Complete Specification Left, 11th Sept., 1893-Accepted. 14th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Syphon Discharge Cisterns.
We JAMES CRAIG of the Firm of J. & M. Craig of Kilmarnock, Ayrshire,
Fire Clay Manufacturers, and ROBERT HIGHET, Senior, Foreman, to said firm,
do hereby declare the nature of this invention to be as follows:-
This invention relates to syphon discharge cisterns for flushing water closets,
urinals and the like and it has mainly for its object to ensure effective starting of
the syphon on pulling the closet or other handle and the provision of an afterflush
when such is requisite or desirable.
The cistern which may be of any convenient shape and adapted to be secured
to a wall or rest upon a bracket is provided with a syphon discharge outlet in the
side having preferably two orifices in the.cistern and two waterways or passages
meeting to form a single discharge outlet. In the cistern is fitted a displacer or
hollow plunger which may be of cylindrical or square or conical shape conform to
shape of cistern having a rim or bottom plate extending over the whole area of
the cistern which it fits loosely so as to ensure the displacement of a sufficient
volume of the water to start the syphon. This plunger or displacer is actuated
directly by a pull rod cord or chain passing up through a tube extending through
the bottom of the cistern to a point over the normal water level, the rod or chain
having a suitable handle or being connected directly or through levers to the closet
handle and being actuated as a pull only or as a pull and let go."
26
The plunger or displacer instead of being actuated in this way by a rod or
cord or chain passing up through a tube from bottom may be connected to a lever
across top of cistern said lever being operated by. means of a cord or chain
attached to end of same in the usual way. The plunger may also be actuated by
means of a lever connected by rod or chain and lever to the closet seat.
A hollow float of annular form is provided and fitted around the upper portion
of the plunger or displacer and it is suspended from a lever connected to operate
an ordinary ball valve so as to ensure the maintainance of water supply to the
cistern.
Instead of disposing the float around the plunger as described the converse
arrangement may be adopted in which case however the displacer will be actuated
through a lever instead of being directly acted on by the pull rod. In either
case whilst the syphon is charged by a displacer acting on the whole area of the
cistern the arrangement provides for a float placed within the same chamber.
In cases in which an afterflush is requisite or desirable a separate compartment
is formed at the bottom of the cistern either entirely across or only at one side
of it. This compartment is connected by an orifice to the discharge end of the
syphon from which it is filled during the discharge and an outlet is formed from
which the water escapes from this compartment into the outlet at a lower level so
as to constitute the afterflush.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Syphon Discharge Cisterns.
We, JAMES CRAIG of the Firm of J. & M. Craig of Kilmarnock, Ayrshire,
Fire Clay Manufacturers and ROBERT HIGHET Senior, Foreman to said firm
do hereby declare the nature of this invention and in what manner the same is to
he performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to syphon discharge cisterns for flushing water closets
urinals and the like and it has mainly for its object to ensure effective starting of
the syphon on pulling the closet or other handle and the provision of an afterflush
when such is requisite or desirable.
As represented in the accompanying drawings in vertical sections at right angles
to each other at Figures 1 and 2 and in horizontal section at Figure 3 the cistern A
which may be of any convenient shape and adapted to be secured to a wall or
rest upon a bracket is provided with a syphon discharge outlet in the back having
preferably two orifices in the cistern and two waterways or passages B B
meeting to form a single discharge outlet B'. In the cistern is fitted a displacer
or hollow plunger C which may be of cylindrical or square or conical shape to
conform to the shape of the cistern having a rim or bottom plate C¹ and extending
over the whole area of the cistern A which it fits loosely so as to ensure the
displacement of a sufficient volume of the water to start the syphon.
This
plunger or displacer is actuated directly by a pull rod D passing up through a
tube E extending through the bottom of the cistern to a point over the normal
water level the rod D being connected by a cord or chain to a suitable handle or
being connected directly or through levers to the closet handle and being actuated
as a pull only or as a "pull and let go."
The plunger or displacer C instead of being actuated in this way by a rod or
cord or chain passing up through a tube from the bottom may be connected to a
lever across the top of the cistern as indicated at Figure 4 said lever being
operated by means of a cord or chain attached to end of same in the usual way.
The plunger may also be actuated by means of a lever connected by rod or
chain and lever to the closet seat and in this case the plunger is weighted and the
seat of the closet when released allows the plunger to fall and so start the
syphou.
A hollow float F of annular form is provided and fitted around the upper
portion of the plunger or displacer C and it is suspended from a lever G con-
nected to operate an ordinary ball valve H so as to ensure the maintenance of
water supply to the cistern.
Instead of disposing the float around the plunger as described the converse
arrangement may be adopted as shewn at Figure 4 in which case however the
displacer is actuated through a lever instead of being directly acted on by the
pull rod.
In either case whilst the syphon is charged by a displacer acting on
the whole available area of the cistern the arrangement provides for a float placed
within the same chamber.
In cases in which an afterflush is requisite or desirable a separate compartment I
is formed at the bottom of the cistern A either entirely across or only at one side
of it. This compartment is connected by an orifice i to the discharge end B' of
the syphon from which it is filled during the discharge and an outlet is formed
from which the water escapes from this compartment into the outlet B₁ at a lower
level so as to constitute the afterflush.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is :—
1. A syphon discharge cistern the parts of which are constructed combined and
arranged to operate substantially as described.
2. In a syphon discharge cistern the combination of a displacer acting on the
water over the whole available area of the cistern, a float surrounding or
surrounded by the displacer and a syphon discharge orifice or orifices in the side
of the cistern substantially as described.
3. The combination with a syphon discharge cistern constructed and furnished
as described of an after flushing chamber connected by inlet and outlet orifices to
the discharge outlet.
Dated this 9th day of September 1893.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.