We got a call from a homeowner after his HVAC service company threw up their hands and said they could do no more to get the cooling system to work. They had recently replaced two failed compressors ...

Years ago, it was common for shops to have a central power source that drove all the tools through a system of belts, wheels and driveshafts. The power was routed around the work space by mechanical ...

The small hermetic compressors in ordinary household refrigerators or freezers usually have a permanently welded circular steel shell, which can seal the working gas inside the system. There is no way ...