Control arrangement for electrical comminutor

Claim 1

In an arrangement as described, in combination, a grinding unit for coffee and analogous materials; electric motor means arranged for driving said grinding unit; switch means associated with said motor means and displaceable from a normal motorstopping to a motor-energizing condition; timing means arranged to be set for a plurality of different time periods; and actuating means associated with said switch means as well as with said timing means and movable between an inactive position and a plurality of active positions in each of which it displaces said switch means to motor-energizing condition and sets said timing means for a predetermined period of time, and actuating means comprising a stationary projection and an elongated pushbutton having a circumferential surface provided with a plurality of angularly spaced longitudinally extending grooves dimensioned to accommodate said projection and each having a length different from the others and an open end facing towards said projection, said pushbutton being mounted for turning movement between a plurality of time-selecting positions in each of which an open end of one of said grooves registers with said projection, and for axial movement to a corresponding plurality of positions in each of which said pushbutton is displaceable relative to said projection by a distance corresponding to the length of the respectively registering groove to thereby displace said switch means and to set said timing means for a time period the length of which is determined by the length of said registering groove.