Abstract: Disclosed is a valve having a body having an inlet channel, an outlet channel in fluid communication with the inlet channel, and a flow-monitoring region situated medially between the inlet and outlet channels. Further provided within the body is a secondary channel having a first end and a second end, the first end in fluid communication with the inlet side of the flow-monitoring region and the second end extending to the outside of the body. The first end of the secondary channel is provided with an area of constriction proximal to the inlet side of the flow-monitoring region. Within the secondary channel is a piston slideably moveably situated. The piston is a pole magnet having a magnetic axis substantially co-linear with the axis of the secondary channel. The diameter of the piston is greater than the diameter of the constriction. Secured within the second end of the secondary channel is a plug. This plug is a pole magnet having a magnetic axis in alignment with the axis of the secondary channel.

Abstract: A liquid level sensing means for use in a tank or the like, adapted to hold a liquid which is partially withdrawn and/or replenished from time-to-time. Disposed within the liquid is a buoyant, upright, hollow reed switch-like float element having a longitudinal axis parallel with the direction of movement of the liquid level within the tank. The switch element is adapted to float upon the surface of the liquid whose level is to be sensed. It is provided with an upper reed and a lower reed, each in alignment with the longitudinal axis of the float element. The upper reed is rigidly secured to the upper end of an envelope of the float element, while the lower reed thereof is spring biasly secured to the lower end of the float element envelope. At a location medially between the upper and lower ends of the float element envelope, there exists an area of overlap between the unsecured ends of the upper and lower reeds respectively.

Abstract: Disclosed is a non-position sensitive, non-memory condition sensitive, automatic reset flow sensor having a solid housing having an inlet port and an outlet port connected by an axial bore through the center of the sensor housing. An armature is free to move axially within the bore within a range of motion defined by two pairs of detents, the detents extending radially toward the center axis of the bore. The magnetic axis of the compensating magnet is such as to normally oppose the magnetic axis of the armature and, thereby, to apply a magnetic repulsion against the armature to bias the armature toward the inlet port of the sensor housing.