Abstract: In a system for quality control evaluation of energized electrical power sources, a waveform analysis apparatus and method is employed permitting greatly increased capability for the detection, measurement and evaluation of the signal characteristics, especially the noise signal, of the tested units. A high-speed magnetic tape recorder stores the output signal of the unit under test. A high-speed AC-to-DC converter receives the output noise signal and inputs it to a fast-responding, track-and-hold peak detector. The peak level output signal of the peak detector may be displayed for any desired time interval and the peak detector reset resulting in discrete time interval printouts of peak noise output. Noise levels of interest may be rapidly located and a complete display of the power source output signals during that time interval of interest obtained from the magnetic tape recorder allowing detailed waveform analysis.

Abstract: The instant invention increases the sensitivity of Josephson Junction Cryogenic Magnetometers by the use of stacked SQUID arrays. The SQUID sensitivity at each sensing point is increased by making an intimate, co-axial superposition of two or more two-junction DC SQUID loops, using evaporated thin-film technology although fabrication is not limited to this technology. The device permits multiple use of the SQUID loop area, thereby increasing the sensing volume and improving the coupling to the ambient magnetic field.

Abstract: A heat exchanger for cooling contaminated liquids causing precipitation of olid matter on cold walls. Waste water at high temperature containing contaminants in the form of sludge and in solution is pumped through the annular space between two concentric cylindrical tanks. Cooling water is circulated through the tanks on either side of the annular space while scraping devices rotate about the annular space preventing buildup of precipitate on the annular space walls.

Abstract: A diode array convolver using narrow rails on a transparent piezoelectric substrate to support a MESA diode array.

Abstract: A pressure-tight cap assembly providing a leak-proof seal against positive nternal tank pressure. Tank pressure may be vented prior to unlocking and removing the cap. The cap assembly incorporates an external adaptor with ears and slots in its outside circumference to be permanently threaded onto the tank outlet pipe and a quick-disconnect cap containing a spring. The spring fits inside the adaptor and the cap slides over the adaptor and locks onto the adaptor by means of cylindrical pins on its inside diameter received by the slots of the adaptor. A rubber O-ring fits between the outer diameter of the adaptor and the inner diameter of the cap and cooperates with the spring to provide both a leak-proof seal and a means for venting tank pressure.

Abstract: A method and apparatus is provided allowing submersible vessels to selectly control buoyancy by use of a simple, selective weight release system. A stacked series of weights varying in shape, size or composition is releasably held on a rotating shaft. Orientation of the weight on the shaft and its location in the stack determine when it is released from the shaft.