Improved Apparatus for Automatic Flushing Cisterns.
Year: 1897

page_text: Date of Application, 24th Aug., 1897
Complete Specification Left. 1st Apr. 1898-Accepted, 9th July 1898
PROVISIONAL SPECIFICATION.
Improved Apparatus for Automatic Flushing Cisterns.
We, WILLIAM ROBERT RAWLINGS and JOHN JOSEPH RAWLINGS, both of 82,
Gloucester Road, South Kensington, Sanitary Engineers, do hereby declare the
nature of this invention to be as follows:-
This invention consists of an improvement to the syphons of automatic flushing
cisterns to give the same a positive action. The apparatus consists as usual of
trap and syphon and can be placed inside the cistern instead of as usual with
the trap beneath cistern and syphon within or the apparatus can be arranged
partly inside and partly outside of the cistern above the level of the bottom or
the offset could be placed below the level of the bottom. If the trap of syphons
now.in general use is placed within the cistern and syphon arranged to suit upon
the water filling cistern and syphon becoming charged in any of the usual
methods of releasing or displacing the pent air between syphon and trap so that
the syphon is set in action the water would only be syphoned out of the cistern
(unless a tale pipe of sufficient suction were attached) until it reached the level
of water line in trap and then the air would return up the down pipe of trap
and gradually break the pulling effect of water and so stop the syphoning action
before the water level has reached the bottom of syphon leg in cistern. Our
invention consists in arranging the down pipe of trap so that the water as it
issues through the nozzle in bottom of cistern, if the arrangement is inside the
cistern or at a similar suitable place if the arrangement is outside the
cistern, is made to impinge across the bore of the pipe so as to cut off the air.
This is effected by forming an offset in the outgo pipe at the lowest end of the
trap whether when placed within or without the cistern, it of course being under-
stood that a syphon is in the usual manner connected to this trap.
The advantage of placing the trap within the cistern or at the side instead
of beneath is that it permits of the cistern being used in positions where height
is of importance also it facilitates manufacture.
Improved Apparatus for Automatic Flushing Cisterns.
We, WILLIAM ROBERT RAWLINGS and JOHN JOSEPH RAWLINGS, both of No. 82,
Gloucester Road, South Kensington, in the County of Middlesex, Sanitary
Prine 8d1

page_text: Engineers, 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 consists of an improvement to the syphons of automatic flushing
cisterns to give the same a positive action. The apparatus consists as usual of
trap and syphon, and can be placed inside the cistern instead of as usual with
the trap beneath cistern and syphon within, or the apparatus can be arranged
partly inside and partly outside of the cistern above the level of the bottom or
the offset could be placed below the level of the bottom. If the trap of the syphons
now in general use is placed within the cistern and syphon arranged to suit upon
the water filling cistern and syphon becoming charged in any of the usual
methods of displacing the pent air between syphon and trap so
syphon is set in action, the water would only be syphoned out of the cistern
(unless a tale pipe of sufficient suction were attached) until it reached the level
of the water line in trap, and then the air would return up the down pipe of trap
and gradually break the pulling effect of water and so stop the syphoning action
before the water level had reached the bottom of syphon leg in cistern.
that
Our invention consists in arranging the down pipe of trap so that the water
as it issues through the nozzle in bottom of cistern, if the arrangement is inside
the cistern, or at a similar suitable place if the arrangement is outside the cistern
is made to impinge across the bore of the pipe so as to cut off the air. This is
effected by forming an off-set in the out-go pipe at the lowest end of the trap
whether when placed within or without the cistern it of course being under-
stood that a syphon is in the usual manner connected to this trap.
The advantage of placing the trap within the cistern, or at the side instead
of beneath, is that it permits of the cistern being used in positions where height
is of importance. Also it facilitates manufacture.
The drawings annexed more particularly describe the manner in which the
invention is constructed and utilised.
Fig. 1 shows a vertical section of an automatic flushing cistern and its con-
struction is self-evident. The off-set is shewn at A.
Fig. 2 is another modification and the off-set is shown at A.
Fig. 3 also shows the same application.
Fig. 4 shows the off-set fitted to a syphon when the same is extended outside
the cistern on the side thereof. It is manifest that other forms of syphon can
also be used. The off-set need not be constructed exactly as shown in the draw-
ings, but the bend should be sufficient to cause the water to impinge across the
pipe on either one side or the other of the bend, and thus prevent the return of
air.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
-
(1) An off-set arranged upon the outward leg of a syphon as hereinbefore more
particularly described.
(2) An off-set arranged in combination with and upon the outward leg of a
double syphon for insuring the cistern being discharged and preventing the
return of air to trap which would otherwise break the syphonage.
1000