Locking and Arresting Mechanisms
A ratchet mechanism is used widely as a means of arresting a motion and producing intermittent action of a force so that it develops its action at particular instants. The ratchet bar is provided with teeth with which the pawl B engages. The pawl, which is controlled by a spring, is pivotally mounted in a frame C in which the ratchet bars is also mounted in a sideway.
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