| 摘要 |
<p>It comprises a cam unit (41), a reversing cam (1) driven by a motor and carrying a ratchet (37) for driving the unit, and a timing cam (23). The ratchet (37) can be retracted. A lever (21) can follow the profile of the timing cam (23). A memory wheel (16) can be driven by the reversing cam (1) via a rocker (5) and via a lever (12) driven by the rocker (5), over an angular distance defined by a rotatably mounted disc segment (18) and the lever (21) and defining a timing period during which the ratchet (37) is retracted and does not drive the cam unit (41). With such a programmer it is possible to provide as many timing periods as desired. <IMAGE></p> |
