Device for selbsttaetigen predetermined flue signal can be seen in fig. 2, the amounts of a container

摘要

A measuring tube with two shanks, the first one having the orifice below the surface of a liquid from which a volume is to be measured, has means to apply a suitable gas pressure above said liquid as compared with the pressure at the orifice of a second shank, there being further between these two shanks a branch with a side-tube, which can also be placed under a suitable gas pressure in relation to the pressure at the orifice of the other shank and to that at the surface of the liquid a controllable valve being adapted to open and close the orifice of the side-tube, a detection device being also placed at a well defined level on the second shank before the orifice of the same in flow direction, and being so arranged that, when the interface between gas and fluid in the measuring tube while the valve is closed reaches the detection level in said shank the detection device actuates a mechanism which opens the valve device thus releasing the volume between said detection level and the side-tube which volume is thus measured.