| 摘要 |
<p>A ratchet and pawl mechanism, for a programmed control device of the kind having a rotatable element rotation of which controls operations of the appliance utilizing the device, comprising a pawl and ratchet tooth arrangement 5, 8 for rotating said element in a series of steps, a pivotable member 2 for moving said pawl 5 to coact with said ratchet teeth 8, and a load cam 1 operable to cause oscillatory pivotal movement of said member 2, said pawl 5 and said pivotable member 2 co-operating with one another adjacent the pivot axis 3 of said member 2 and said member 2 including a substantial mass 10 remote from said pivot axis 3 and being formed from a material of high density. <IMAGE></p> |
