초록 ▼

A liquid level sensor for reducing and monitoring liquid level in a vessel, such as a heated pot or kettle is provided. The sensor issues a signal when the liquid level drops to a level below its predetermined level. The signal may initiate an audio or visual alarm, or may stop the action causing th

A liquid level sensor for reducing and monitoring liquid level in a vessel, such as a heated pot or kettle is provided. The sensor issues a signal when the liquid level drops to a level below its predetermined level. The signal may initiate an audio or visual alarm, or may stop the action causing the liquid level to drop.

대표청구항 ▼

[ I claim:] [1.] A liquid level control apparatus for monitoring the liquid level in a liquid containing vessel having a generally upright side wall with interior and exterior surfaces, and for providing a signal for indicating that the liquid has reached a predetermined level and, if desired, for a

[ I claim:] [1.] A liquid level control apparatus for monitoring the liquid level in a liquid containing vessel having a generally upright side wall with interior and exterior surfaces, and for providing a signal for indicating that the liquid has reached a predetermined level and, if desired, for activating an output signal or safety means, which comprises:a floating magnet assembly comprising a floating magnet and an elongated guide container for constraining said floating magnet assembly to become displaced, in a vertical path proximal to the internal wall of said vessel, from an initial floating level within said container, wherein said floating magnet comprises a permanent magnet connected to a float for concurrent and equal displacement;a liquid communication between the vessel and the guide container, so that the liquid level will be the same and will change substantially concurrently and by the same amount in both of them, at least after it has reached said initial floating level;a sensing and control assembly located outside said vessel, comprising a vertically extended support; at least one magnetically actuatable switch displaceably mounted on said support; said support being so positioned with respect to said vertical path that said floating magnet will be close enough to said switch to actuate it, at least at one pre-selected actuation level; and a control device connected to said magnetic switch for generating an output signal, including alarm and safety signals discontinuing in operation, upon actuation of said magnetic switch; positioning said displaceable switch at a selected level, defines the pre-selected liquid level at which said switch will be actuated.