Abstract: Apparatus for measuring the wear of a shaft bearing includes a liquid, a source of fluid, a valve, sight gage and a transducer. The transducer has a probe which may be urged against the shaft by admitting fluid from the source to a chamber in the transducer. The liquid is in enclosed subsystem comprising the sight gage, an expandable chamber in the transducer and a connecting line. As the probe is urged against the shaft, the expandable chamber expands in a relationship to the movement of the probe. More liquid enters the expandable chamber, causing a corresponding decrease of liquid in the sight gage which is measurable. Upon completion, the fluid is vented, which allows the probe to return to a rest position.

Abstract: A conduit vent-and-valve combination especially adapted for tank ships employing gas-inerting of cargo tanks. It includes location of the vent and valve adjacent to one another in the conduit, and employs mechanical interlock between the valve hatch cover and an extension of the valve stem in order to prevent closing the hatch unless the valve is fully open.