To maintain cable tension, a torsion spring is coupled to the spool.
The pointer shaft is held toward zero by a fine torsion spring.
The other method was a baited torsion spring which when triggered, would stab the wolf in the head.
Do not try to adjust torsion springs; these develop tremendous power, and adjusting them is dangerous.
It connects opposite (left/right) wheels together through short lever arms linked by a torsion spring.
A sway bar is usually a torsion spring that resists body roll motions.
The fiber acts as a very weak torsion spring.
At this point an internal torsion spring takes over, rapidly forcing the blade into an open and locked position.
Do not attempt to adjust a torsion spring unless you are experienced and know the procedures specific to your model.
A tiny torsion spring pulls the coil and pointer to the zero position.