[Chronoscopes]

Chronoscope control contact according to Külpe, modified by Ach. For the control of the chonoscope time there is platinum point mounted above a magnet, isolated from the chronoscope, which gets into conducting contact with the pointer wave of the up to 0,0001 seconds precise clockface as soon as the pointer work is operating. Depending of the use of the upper or lower pair of magnets the opening moment is registered graphically; 0,080kg.

Chronoskop-Kontrollkontakt nach Külpe, modifiziert von Ach