It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, the balance spring or hairspring.
32.
When the knife is in the closed position, the blade is held in place by means of torsion springs and an additional blade lock ( optional ).
33.
Torsion springs are adjusted by inserting an iron bar into a slot at the end of the spring, then twisting it to tighten an internal ratchet mechanism.
34.
Modern depictions of this catapult are usually of an onager with its torsion spring power source replaced by a bow, but some doubt if this weapon ever existed.
35.
A coil spring may also be used as a torsion spring : in this case the spring as a whole is subjected to torsion about its helical axis.
36.
Rather than using a torsion spring that often twists, causing the clothespin to fall apart, they rely on a strong, trapped, compression spring that results in a stronger grip.
37.
Torsion balances, torsion pendulums and balance wheels are examples of torsional harmonic oscillators that can oscillate with a rotational motion about the axis of the torsion spring, clockwise and counterclockwise, in harmonic motion.
38.
This includes the torsion springs or balancing springs ( depending on the type of hardware on the door ), the lock hardware and the various cables connecting the lifting mechanism to the door.
39.
Her husband, an engineer, conceived of the toy in 1943 while working at a shipbuilding company in Philadelphia, after a torsion spring fell off of a table and started flipping end over end.
40.
In the S-Type it was replaced by a higher-geared Burman unit of 3.5 turns lock-to-lock, which linked the input shaft and hydraulic valve by a torsion spring to improve its " feel ".
