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Torsion bars and torsion fibers do work by torsion. However, the terminology can be confusing because in helical torsion spring (including clock spring), the forces acting on the wire are actually bending stresses, not torsional (shear) stresses. A helical torsion spring actually works by torsion when it is bent (not twisted).
Mainspring in a 1950s alarm clock. The end of the spring is attached to the frame post at lower right. Cross section of a going barrel in a watch (mainspring fully wound). Going barrel of a watch, opened. The mainspring is coiled around an axle called the arbor, with the inner end hooked to it.
A couple of Captains of Crush gripper models: Trainer (Left) and No. 4 (Right) Captains of Crush Grippers (commonly nicknamed "CoC") is a brand of torsion-spring grippers (a torsion spring fitted with two handles) designed, manufactured and sold by IronMind Enterprises, Inc., based in Nevada City, California.
A mass market, plastic-handled gripper A gripper being closed. Grippers, sometimes called hand grippers, are primarily used for testing and increasing the strength of the hands; this specific form of grip strength has been called crushing grip, [1] which has been defined as meaning the prime movers are the four fingers, rather than the thumb.
A torsion spring is a spring that works by twisting; when it is twisted about its axis by an angle, it produces a torque proportional to the angle. A torsion spring's rate is in units of torque divided by angle, such as N·m/rad or ft·lbf/degree. The inverse of spring rate is compliance, that is: if a spring has a rate of 10 N/mm, it has a ...
A gravity escapement uses a small weight or a weak spring to give an impulse directly to the pendulum. The earliest form consisted of two arms which were pivoted very close to the suspension spring of the pendulum with one arm on each side of the pendulum. Each arm carried a small deadbeat pallet with an angled plane leading to it.
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