(57) Method for the discontinous advance of the cam unit (13) in timers (10) for domestic
appliances, the cam unit (13) cooperating by means of a toothing (12) with a transport
lever (11) associated with an eccentric (14) connected to a continuously rotating
motor (15), each single advance step of the cam unit (13) being correlated to a rotation
of 360° of the eccentric (14), the advance steps of the cam unit (13) causing the
opening/closing of electrical contacts so as to generate radio disturbances, each
single advance step (16) of the cam unit (13) being sub-divided into at least three
semi-steps, respectively the first semi-step in advance (16a) and the second semi-step
in advance (16c) being functionally correlated to the presence of electric contacts
in cooperation with the cam unit (13), the third, intermediate semi-step in advance
(16b) being carried out at a reduced speed compared with the semi-steps (16a, 16c)
and such that the cam unit (13) does not perform any switching of electric contacts
while the third intermediate semi-step (16c) is being carried out.
Device for the discontinuous advance of the cam unit (13) achieving the method as
above, the eccentric (14) being associated with means (19, 21) to accelerate/decelerate
the transport lever (11) which intervene for at least one segment of each individual
advance (16) of the cam unit (13) so as to define at least three semi-steps in advance
at differentiated speeds, a first semi-step in advance (16a), a third, intermediate
semi-step (16b) and a second semi-step in advance (16c), wherein the third, intermediate
semi-step (16b) has a reduced speed compared with the first (16a) and second (16c)
semi-steps in advance.
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