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REVERSIBLE-PAWL RATCHET MECHANISM

Ratchet wheel 1 rotates about fixed axis A. Reversible pawl 2 turns about fixed axis B which is designed as triangular prism 3. The direction in which wheel 1 can rotate depends upon the position of pawl 2. Pawl 2 is held in each of its two indexed positions by spring 4 and slider 5.
$2674$RG,3L$