John R Bower, Charles W Hammond: Sonic apparatus and method for detecting the presence of a gaseous substance in a closed space. The Babcock & Wilcox Company, Robert J Edwards, James C Simmons, D Neil LaHaye, March 11, 1986: US04574615 (110 worldwide citation)

A method and apparatus for detecting the presence of a gaseous substance within a space bounded by an enclosure utilizes the fact that sound is not transmitted through a vacuum and is transmitted through the material of the enclosure. A sonic wave transmitter and a sonic wave receiver are engaged wi ...

John R Bower, Thomas Powers, Hubert L Whaley: Ultrasonic method and apparatus for determining water level in a closed vessel. The Babcock & Wilcox Company, Vytas R Matas, Robert J Edwards, Daniel S Kalka, June 9, 1992: US05119676 (46 worldwide citation)

An ultrasonic method and apparatus for measuring liquid level in a vessel employing an acoustic waveguide (16) connected to an ultrasonic transducer (14) and the vessel (18). Guiding means (24) situated inside a vessel (18) directs the acoustic energy pulse to a surface (22) of the liquid. The acous ...

John R Bower: Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies. Worthington Pump, Daniel H Bobis, January 13, 1981: US04244675 (12 worldwide citation)

A compensator for differential thermal expansion in a multi-stage barrel type centrifugal pump has a truncated conical body section and a plurality of leaf springs extending radially from said body section, the compensator is disposed in the multi-stage barrel type centrifugal pump between the outer ...