A clockwise torque is applied by weight 7 to disk 6 which rotates about fixed axis A. Pawl 2 is keyed with planet pinion 3 to a stud shaft. Pinion 3 meshes with fixed sun gear 4, forming planetary gearing of which disk 6 is the carrier. One end of spiral spring 5 is attached to disk 6 and the other to link 1 which rotates about axis A. Spring 5 turns link 1 which, in turn, engages pin b of link 8 and turns this link. At this, link 10 is turned through a small angle by spring 9 and slides off braking surface c of link 8. When link 10 turns, its braking surface d releases pawl 2. This allows disk 6 to be turned by weight 7, and pinion 3 makes one revolution in rolling around gear 4. After this, arm e of pawl 2 engages arm a of link 10, turning the link so that it again contacts braking surface c of link 8 which is stopped beforehand by a device that is not shown. As disk 6 rotates, it winds up spring 5. After one revolution of pinion 3, pawl 2 again brakes the mechanism.
$2739$RG,ML$