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CAM-OPERATED VEE-GROOVE BRAKE MECHANISM

Drum 3 rotates about fixed axis B and is braked by means of two vee-shaped shoes 2 which turn about fixed axis C. Shoes 2 are applied to the vee-groove drum by spring 4 which can be adjusted by nut 5. The shoes are spread to release the brake by turning cam 1 about fixed axis A.
$3129$SmC,Br$