Drum 1 turns about fixed axis D, has internal ratchet teeth a and is encircled by brake band 4 whose ends A and B are attached to the base and to lever 2. Lever 2 turns about fixed axis A. Pawl 3 rotates about axis C of crank 6 which rotates counterclockwise about axis D. Pawl 3 is held against teeth a by flat spring 7. Rotation of crank 6 in the opposite direction is prevented by brake band 4 which is tightened by weighted lever 2. The braking force is regulated by adjusting weight 5 along lever 2.
$2765$RG,Br$