? Electromotor with centrifuge-regulator according to Garten. The motor axle is connected to a ringforming spring C, which opens the platinum contact at a certain number of revolutions. That interrupts the main current and keeps the number of revolutions on a constant level. P is put into a more or less firm contact by the micrometer screw. The front screwing of the axle suites for mounting the siren discs, episcopes (?) etc. Motor for 110 to 220 volt main current and 1/16 horsepower without siren disc; 6000 kg.
