Improvements in Automatic Flushing Apparatus.
Year: 1892

page_text: Date of Application, 7th June, 1892
Complete Specification Left, 6th Mar., 1893-Accepted, 7th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Automatic Flushing Apparatus.
I, FREDERICK JAMES COLLINGWOOD of Roualeyn Rhyl in the County of
Flint, Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object a means for automatically discharging fluid from
a tank or cistern by a siphon at regulated periods.
This is accomplished by automatically increasing the rate of feed into the tank
at the time when the fluid rises to about the level at which the over-flow takes place
or so arranged that a slight overflow into the siphon shall itself cause a very much
larger overflow to take place, and thus causing a much greater overflow down the
siphon pipe than the ordinary feed would allow.
This can be effected in various ways but one plan consists in having two or more
supply orifices one of them the constant and regulatable supply, the other operated
by a float or ball cock at the right moment. In order to obtain discharges of
uniform quantities in all instances by preventing the formation of vacuum under
the siphon I arrange the trapping box with a slight leak or drain whereby the
longer leg of the siphon is unsealed until the overflow commences, when a seal
immediately occurs through the overflow being much in excess of the slight leak
or drain.
The siphon can be of any ordinary construction and the regulating device for
the feed can be graduated so that any given discharge can take place.
The form of siphon which I prefer instead of being a simple bend projects out
at the top beyond the longer leg and is bent under again. By this means a lip is
formed and the drip therefrom falls through the leg near the centre and thus has
much more friction on the air than if it fall down the side.
can be used however if desired.
1
1000
Other forms of siphon
FRED. J. COLLINGWOOD.
Wm. P. Thompson & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION..
Improvements in Automatic Flushing Apparatus.
I FREDERICK JAMES COLLINGWOOD of Roualeyn Rhyl in the County of
Flint Civil 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 has for its object a means for automatically discharging fluid from
a tank or cistern by a siphon at regulated periods.
This is accomplished by automatically increasing the rate of feed into the tank
at the time when the fluid rises to about the level at which the overflow takes place
or so arranged that a slight overflow into the siphon shall itself cause a very much
larger overflow to take place and thus causing a very much larger overflow down
the siphon pipe than the ordinary feed would allow.
This can be effected in various ways of which the following are two of
them.
There may be two or more supply orifices one of them the constant and
regulatable supply the other operated by a float or ball-cock at the right moment.

page_text: The arrangement may be to have both the constant regulatable supply and the
intermittent supply made by one cock with a regulator device.
In order to obtain discharges of uniform quantities and the efficient working of
the siphon it is desirable to construct the trapping box with a leak or drain whereby
the longer leg of the siphon is unsealed until the overflow commences when a seal
occurs through the overflow being in excess of the leak or drain, or a like result is
obtained by fixing the orifice of the long leg of the siphon above the level of the
weir so that it will be unsealed till the overflow commences and reseals it by an
increase in the depth of water in the trapping box.
The siphon can be of any ordinary construction and the regulating device for
the feed can be graduated so that any given discharge can take place.
The form of siphon which I prefer instead of being a simple bend projects out
at the top beyond the longer leg and is bent under again by this means a lip is
formed and the flow therefrom falls through the leg near the centre and thus has
more friction on the air than if it fall down the side other forms of siphon can be
used however if desired.
Figure 1 is a longitudinal central section of a tank and manhole having the
siphon applied thereto for flushing sewers, and Figure 2 is a plan of the same.
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
An automatic increase of the rate of feed to a tank or cistern which increased
feed shall be in operation at the critical time that the fluid is about to overflow
from the tank or cistern through the siphon which is applied to the tank or cistern
by the means, method and apparatus herein described.
Dated this Twenty-first day of February 1893.
FRED. J. COLLINGWOOD.