Engineering topics
Publications and source records attributed to Perkins, W. E..
Improved technique calibrates piezoelectric accelerometers throughout temperature range from ambient to -450 degrees F. Method employs liquid helium as coolant, a cryogenic temperature chamber, a vibration measurement system, and a temperature measurement system.
Alphameric/facsimile printer receives serial digital data in the form of a specified number of bits per group and prints it on thermally sensitive paper. A solid state shift-register memorizes the incoming serial digital data.
Laser method, where high energies of monochromatic light can be precisely collimated to perform welding and machining processes, is proposed for rotary dynamic balancing. The unbalance, as detected with the velocity pickup, would trigger the laser system which would emit high energy pulses directed at the heavy side of the component.