Abstract: An electrical hand tool machine (1) having a motor switch (2) configured as a button and a current regulator (4) disposed in the current circuit of an electrical motor (3), having a soft-start input (5), in whose branch current a timing capacitor (6) is arranged. A current-direction-dependent element (7) is arranged between the soft-start input (5) and the capacitor (6).

Abstract: An electrical hand tool machine (1) having a motor switch (2) configured as a button and a current regulator (4) disposed in the current circuit of an electrical motor (3), having a soft-start input (5), in whose branch current a timing capacitor (6) is arranged. A current-direction-dependent element (7) is arranged between the soft-start input (5) and the capacitor (6).

Abstract: A screw driving power tool including a housing (1, 31), a handle (2, 32) connected with the housing (1, 31), an actuation switch (3, 33), a screw driving device (18, 48) for receiving a screw-containing magazine (21, 51) and releasably connected with the housing (1, 31), an electric motor (5, 35) located in the housing (1, 31) and having a drive shaft (6, 36); an operating spindle (7, 37) operatively connected with the drive shaft (6, 36) of the electric motor (5, 35), a screw driving working tool (11, 41) for driving screws and connected with the operating spindle (7, 37), and an adjustable torque cut-off device for cutting a torque transmittable to the operating spindle off.

Abstract: A circuit arrangement is disclosed for a non-contacting switch-over of operational parameters in an electrically driven tool, for instance, a hammer drill, which are determined by a voltage divider ratio with reference to a stabilized supply source. The voltage divider ratio is obtained by selective parallel switching of an additional ohmic resistor by means of a Hall switch, whose current supply is supplied by a Zener diode which lies in series with the stabilized supply source. The circuit of the Hall switch puts the low point of the additional resistor, connected through a diode, to the low point of the voltage divider, in parallel with the partial resistor of the voltage divider, through a drop resistance. The switching arrangement or circuit arrangement has the advantage that the current supply of an RPM control unit is only slightly additionally loaded or increased.