Improvements in multiple frequency tone generators controlled by keys in which several oscillating circuits are simultaneously arranged through key contacts, characterized in that the tuning contacts (1 to 16 or f1 to f4 and f5 to f8 respectively) of a Oscillating circuit are designed as a chain of switch contacts and because the sides of rest contacts connected in series are connected to the capacitor (C1 C2) of the oscillating circuit, and the sides of working contacts are connected to the sockets (aad, oeah respectively) of the inductance of the oscillating circuits (Ue1, Ue2) tuned to the respective key used. (Machine-translation by Google Translate, not legally binding)
展开▼