A NEW OR IMPROVED AUTOMATIC FLUSHING APPARATUS
Year: 1883

page_text: LETTERS PATENT to Alexander Cunningham Boothby of Kirkcaldy in the
County of Fife for an Invention of "A NEW OR IMPROVED AUTOMATIC
FLUSHING APPARATUS"
PROVISIONAL SPECIFICATION left by the said Alexander Cunningham
Boothby at the Office of the Commissioners of Patents on the 24th March
1883,
ALEXANDER CUNNINGHAM BOOTHBY of Kir[k] caldy in the county of Fife
"A NEW OR IMPROVED [AUTOMATIC] FLUSHING APPARATUS'
"
My invention relates to apparatus arranged to act automatically in opening and
closing a sluice governing the issue from a flushing tank. For this purpose, I
provide the tank with a vertically sliding sluice valve, to which is attached a
submerged air vessel of sufficient buoyancy to lift the sluice, when it is free to rise.
Usually, the sluice is held down by catches engaging on each side of it. These
catches are connected by a set of toggle joints to a float, so that, when the water in
the tank attains a certain level, the float, rising, moves the toggle joints, releasing
the catches. The sluice thereupon rises and allows the water to issue from the
tank. As the tank empties itself, the sluice descends and the catches again become
engaged with it. In order to govern the closing of the sluice, I connect it to the rod
of a piston working in a cataract cylinder charged with oil or other suitable liquid.
There is a passage provided with a check-valve opening downwards from one side
of the piston to the other, and also a passage provided with a cock or valve by
which it can be more or less throttled. As the sluice ascends, the cataract liquid
passes the check valve freely from the upper to the lower side of the piston; but
the descent of the sluice is retarded to any desired degree by the throttled area of
passage for the liquid from the lower to the upper side of the piston. In order
that the sluice may make the last part of its descent rapidly, so as to become tightly
closed against the seat, which is somewhat inclined from the vertical, I provide a
lateral passage at the bottom of the cataract cylinder, opening into the cylinder a
little above the bottom, so that as soon as the cataract piston passes the upper mouth
of this passage, the liquid can freely flow from under it, the cataract piston being
thus permitted to complete its stroke rapidly.

page_text: gear И
* 2283 4LA
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alexander Cunningham-Boothby in the Great Seal Patent Office
on the 21st September 1883.
..
ALEXANDER CUNNINGHAM BOOTHBY of Kirkcaldy in the County of Fife
"A NEW OR IMPROVED AUTOMATIC FLUSHING APPARATUS
"
aqqanidan oisamouA
My invention relates to apparatus arranged to act automatically in opening and
closing a sluice governing the issue from a flushing tank.
For this purpose, I
provide apparatus such as is shewn by the accompanying drawings, Fig. 1 being a
side view partly in section, and Fig. 2 a front view. The outlet A of the tank is
closed by, a vertically sliding sluice (valve, B, to, which is attached a submerged air
Vessel D of sufficient buoyancy to lift the sluice, when it is free to rise. Usually
the sluice is held down by catches T T engaging on each side of it. These catches
are connected by a set of toggle joints I I and rod H to a
a float Q so that
when the
water in the tank attains a certain level, the float, rising, moves the toggle joints
releasing the catches. The sluice B thereupon rises along guides C C and allows
the water to issue from the tank. As the tank empties itself, the sluice descends
and the catches again become engaged with it. In order to govern the closing of
the sluice, I connect it to the rod F of a piston P working in a cataract cylinder G
charged with oil or other suitable liquid. There is a passage provided with a
check valve opening downwards from one side of the piston to the other, and also
a passage provided with a cock or valve K by which it can be more or less throttled.
As the sluice ascends, the cataract ¡liquid passes the check valve freely from the
upper to the lower side of the piston P; but the descent of the sluice is retarded to
any desired degree by the throttled area of passage for the liquid through K from
the lower to the upper side of the piston. In order that the 'sluice may make the
last part of its descent rapidly, so as to become tightly closed against its seat,
which is somewhat inclined from the vertical, I provide a lateral passage 'N' at the
bottom of the cataract cylinder opening into the cylinder a little above the
bottom, so that as soon as the cataract piston passes the upper mouth of this
passage, the liquid can freely flow from under it, the cataract piston being thus
permitted to complete its' down'stroke rapidly. The passage can be regulated by, a
cock Osweil wall but it moquets i
J.
A
Having thus described the nature of my invention and in what manner the saine
is to be performed, I claim to colon
diw be
First The construction of flushing apparatus wherein a buoyant sluice valve is held
down by catches connected by toggle joints to a float, the ascent of which
vi ovirreleases the catches, allowing the sluice valve to rise, and open the outlet of
bigpit a tank, substantially as herein described. 19.
Second In combination with flushing apparatus of the kind referred to in the
To ste preceding claim, a cataract cylinder and piston for governing the descent of
the sluice valve substantially as herein described on p
"
YO
In Witness whereof 'I the said Alexander Cunningham, Boothby, have hereunto
Set my hand and seal this Twentieth day of September in the year of our Lord
One thousand eight hundred and eighty three.
quid
'He
da sini.
two ALEXIC BOOTHBY (L.S.)
vibine alouda eti stijurce u stimme