HAND OPERATING CIRCUIT REMOTE CONTROLLER

PURPOSE:To prevent a hand operating circuit from malfunctioning by providing an AND gate which ANDs the output of a differentiating circuit differentiating the output of the 1st comparator, and the output of the 2nd comparator. CONSTITUTION:When the terminal voltage Vc of a capacitor 18 drops approximately to the reference voltage V1 of a comparator 22b, an input (b) to an AND gate 27 varies as shown figure II. An input (a) to the AND gate 27, however, never varies unless it drops below the reference voltage V2 of a comparator 22a, so the output of the AND gate 27 never varies, so that a latching relay will not operate. On the other hand, while a load 8 is connected to an outlet 7, the terminal voltage Vc of the capacitor 18 varies as shown in the figure (I') and the outputs V0a and V0b of both the comparators 22a and 22b vary as shown in the figures (II') and (III'), but the point J in time of the connection of the load 8 is delayed behind the point in time of the disconnection of the load 8, so that the output of the AND gate 27 never varies.