Abstract: An armature/contact system wherein the armature rotates about a given axis, and a contactor is mounted thereon for movement therewith. The contactor is so formed as to have a resilient member having a contact surface which is within a plane which includes the axis of rotation of the armature. A stationary contact is provided for engagement by such contactor, such stationary contact having an arcuate contact surface. Limit-stop means is provided for defining the position of the contactor surface within a plane which intersects the axis of the armature whenever the contactor surface and stationary contact surface are out of engagement with each other.

Abstract: An electromagnetic relay which is formed with two distinct and separate compartments, one of which houses the electromagnetic motor and the other of which contains the electroresponsive armature as well as stationery and moveable contacts. Such separate compartments and their components therewithin can be manufactured separately to be subsequently joined together to make the completed relay, with any one of the electromagnetic motors being joined with any one of the armature/contact operating structures. The relay comprises permanent magnet means to increase motor efficiency and which can provide a latching function. Unique stationery contact structures are provided for receiving the motion from the moveable contact as afforded by the armature.

Abstract: An improvement in continuously feeding slurry material to vertical upflow treatment towers. The improvement comprises providing a plurality of spaced apart inlet or outlet openings in the bottom inlet end of the tower and opening and closing the openings in timed sequence to allow the material to selectively flow into the tower from different spaced locations but continuously at a substantially constant rate.