Links 3, 5 and 7 are connected by turning pairs E, F and G to housing 4 which rotates about fixed axis 0. Links 2, 6 and 8, with braking members a, turn about fixed axes A, B and C which belong to fixed links 1. Links 2, 6 and 8 are connected by turning pairs D, K and N to links 3, 5 and 7. When housing 4 is turned counterclockwise with respect to links 1, members a are pressed against stationary body b, thereby braking the housing.
$876$LW,Br$