System to fill a glass or beaker to a controlled level, without an overflow, has twin tubes from the supply container to give a flow through one tube and block the flow through pressure difference when the liquid level reaches both tubes

摘要

The system to give a controlled filling of a glass (9) or beaker with a liquid has an arrangement of twin metal tubes (2) from the connection (4) at the sealed supply container (1), which has a filling valve (5) for use when empty. When pressure from the glass rises a switch (6) is opened and liquid can flow through one tube through the pressure difference (H) between the tubes. At the same time, the air to the container flows through the other tube through a higher atmospheric pressure, and any foam from the poured liquid can be drawn into the container, and the liquid flow is stopped when the liquid level in the glass reaches the outlets of both tubes.