Friction Hinge: A device with torque between two parts on a common axis.
Detent Hinge: A device for repeatable "soft stops" in one or more positions between two parts on a common axis. Not a true friction hinge.
Torque: The force required to create rotation.
A friction hinge is also commonly known as a:
Constant Torque Hinge, Position Hinge, Clutch, Torque Hinge, or Detent Hinge.
Common Applications include:
Laptop computers; lids, doors and enclosures; positioning device for controls, monitors, arms, seat rests