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Torque amplifier
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<p>A torque amplifier is a mechanical device that amplifies the <a href="/facts/Torque/KcrcvNtV">torque</a> of a rotating shaft without affecting its rotational speed. It is mechanically related to the <a href="/facts/Capstan_(nautical)/HAdF2lNP">capstan</a> seen on ships. Its most widely known use is in <a href="/facts/Power_steering/QNuVbLQK">power steering</a> on automobiles. Another use is on the <a href="/facts/Differential_analyser/lgA1m3VS">differential analyser</a>, where it was used to increase the output torque of the otherwise limited <a href="/facts/Ball-and-disk_integrator/XdcIJpuv">ball-and-disk integrator</a>. The term is also applied to some <a href="/facts/Gearbox/eoNqAufN">gearboxes</a> used on <a href="/facts/Tractor/gNc7kb4a">tractors</a>, although this is unrelated. It differs from a <a href="/facts/Torque_converter/EWq1vwVv">torque converter</a>, in which the rotational speed of the output shaft decreases as the torque increases. </p>