Abstract: A vibration tolerant electronic assembly may include a base and a first isolation stage including a first frame, at least one first linear bearing coupling the first frame to the base to constrain movement of the first frame along a first coordinate axis, and at least one first damper for damping movement of the first frame. A second similar isolation stage may be coupled to the first isolation stage, and a third similar isolation stage may be coupled to the second isolation stage. Furthermore, an electronic device may be coupled to the third isolation stage. The electronic assembly provides resistance to disturbance of the electronic device by vibration in one or more of three coordinate axis.

Abstract: A metal spray apparatus is provided with a supersonic nozzle. Molten metal is injected into a gas stream flowing through the nozzle under pressure. By varying the pressure of the injected metal, the droplet can be made in various selected sizes with each selected size having a high degree of size uniformity. A unique one piece graphite heater provides easily controlled uniformity of temperature in the nozzle and an attached tundish which holds the pressurized molten metal. A unique U-shaped gas heater provides extremely hot inlet gas temperatures to the nozzle. A particularly useful application of the spray apparatus is coating of threads of a fastener with a shape memory alloy. This permits a fastener to be easily inserted and removed but provides for a secure locking of the fastener in high temperature environments.