flops of edge trigger type 45 is a j k master slave flip flop 46 is a nor gate 47 is an nand gate 48 49 and 50 are inverters 51 53 to 57 and 67 are resistors 52 and 73 are capacitors 58 to 61 are transistors 63 is a relay 63a is its coil 63b and 63c are contacts 64 to 66 are diodes 68 is a battery of 12 v 69 is a dc power source of 15 v 70 designates a constant voltage dc power source for forming a 5 v power source 5 vc for logical circuit supplied to the elevator control circuit not shown 71 is a voltage stabilizing circuit for outputting a 5 v power source 5 va to be supplied to the clock control signal generating circuit and the power source control circuit in fig3 and the current position detecting circuit in fig2 72 is a voltage stabilizer circuit for outputting a 5 v non power stoppage power source supplied to the current position register in fig2 generally in the elevator control system when it encounters power source trouble such as power stoppage it is in emergency stop condition to stop the car immediately however a slight amount of time is elapsed till the car completely stops further when the power source is restored to its normal condition the elevator must operate normally to this end the final position.