An electric rotating machinery is provided with a stator coil support device, which comprises a stator core provided with a slot having an opening, a stator coil installed in the slot of the stator core, a wedge member disposed so as to close the opening of the slot of the stator core, and an elastic plate member inserted between the stator coil and the wedge member. The flat wiper includes a longitudinal wiper blade, at least one longitudinal stiffening member, a longitudinal member for retaining the wiper blade and the stiffening member, a longitudinal streamlined portion comprising two terminal caps and a central mounting extending between the terminal caps and being connected thereto. The electronic content may be displayed on a graphical user interface.