Abstract: A valve assembly for controlling fluid flow to a tube connected to the assembly by shifting of a sleeve mounted on the assembly. When the sleeve is shifted into a shutoff position, a fluid path through the assembly is completely occluded by a closure element in the sleeve. As the sleeve is rotated away from its shutoff position, the fluid path is gradually opened.

Abstract: An adjustable mechanism including a journal portion and a non-continuous ring member that encircles the journal portion. The ring member has relatively displaceable end parts. A lever member extending in a plane normal to the axis of the journal portion is mounted through a pin on one end part and through another pin on the other end part and the lever member is swingable relative to the ring member to leverage the parts in either of opposite directions. An adjustably positioned member is provided to produce adjustably controlled displacement of the end parts of the ring member.

Abstract: A lock including a housing having an actuator slidably mounted within the housing. A latch bolt and a door-position sensor are mounted within the housing, each extensible and retractable relative to the housing. The actuator has an intermediate position where the latch bolt and sensor are free to move into the housing, a deadlocking position with the actuator shifted in one direction from this intermediate position where the latch bolt is deadlocked in an extended position with the sensor retracted, and another position which produces retraction of the sensor and latch bolt. A pneumatic device powers movement of the actuator toward its other position and a spring biases the actuator toward its deadlocking position.

Abstract: Locking mechanism for locking and unlocking a sliding-type door. The mechanism for the most part is mounted externally of the door, and includes a pivoted, frame-mounted locking member pivotable between locking and unlocking positions. A dead latch latches the locking member in its locking position. An air cylinder is actuated, first to release the dead latch, and then to shift the locking member to its unlocking position. A door-carried locking member also is provided for locking the door at a region remote from the region locked by the frame-mounted locking member.

Abstract: The specification discloses an improved dental cuspidor having a vacuum drain means. The specification also discloses a drain having a drain chamber of which one side is formed by a diaphragm so that when water reaches a given height in the chamber, the diaphragm actuates an air valve to drive a piston to open a drain valve to a vacuum drain.