Which component is NOT typically part of a ratchet device?

In a ratchet device, the primary components are designed to allow controlled motion of the rope in one direction while restricting it from slipping back. A fixed pulley is not typically part of a ratchet device, as the primary function of a fixed pulley is to change the direction of the force applied to move a load, rather than to provide the mechanical advantages and locking mechanisms associated with ratchet devices.

The clutch and progress capture mechanism are integral components of ratchet devices. The clutch allows the device to engage and disengage the ratchet mechanism, facilitating the controlled movement of the rope. Meanwhile, the progress capture mechanism enables the device to capture progress while allowing the operator to pull rope through in one direction. A rope grab, which is often used in conjunction with a ratchet device, can provide additional safety by gripping the rope when tension is released.

Since the primary role of the ratchet device revolves around controlling motion and securing loads effectively, the absence of a fixed pulley highlights the distinction between these devices and those that primarily use pulleys for changing force directions without the same locking capabilities.