Abstract Delay-on-make solid-state controller circuit for series connection to a load, having a bridge rectifier circuit, a silicon-controlled rectifier connected across the bridge rectifier circuit output, a current-limiting resistor, a pair of divider resistors in series connected through the resistor to the rectifier, a variable resistance and capacitance connected in series, and connected in parallel with the divider resistances, a programmable unijunction connected to the midpoint of the resistance capacitance circuit, and through a resistance to the gate of the silicon-controlled rectifier, and a connection from the midpoint of the divider resistors, to the trigger of the unijunction, a capacitance connected between the trigger of the unijunction and the cathode of the silicon-controlled rectifier, a capacitance connected between the cathode of the rectifier and its gate, and a capacitance resistance circuit connected across the bridge output.
A delay-on-make solid state controller circuit comprising a rectifier bridge adapted for load connections across the bridge and having rectified alternating current output connections, a series resistance capacitance net work, and a silicone-controlled rectifier connected in parallel across the output connections, said silicone-controlled rectifier having a latching capacitance connected across its gate and cathode, a series variable resistor capacitor circuit connected through a voltage dropping resistor to said output connections, and having a voltage divider resistance circuit connected in parallel with the variable resistor capacitor circuit, a programmable unijunction having its anode connected to the mid connection of said variable resistor capacitor circuit, its cathode connected through a current limiting resistor to the gate of the silicone-controlled rectifier, and its gate to the midconnection of said divider resistance circuit.
Claim 2
Dependent Claim
129 words
A delay-on-make solid state controller circuit comprising a rectifier bridge adapted for load connections across the bridge and having rectified alternating current output connections, a series resistance capacitance net work, and a silicone-controlled rectifier connected in parallel across the output connections, said silicone-controlled rectifier having a latching capacitance connected across its gate and cathode, a series variable resistor capacitor circuit connected through a voltage dropping resistor to said output connections, and having a voltage divider resistance circuit connected in parallel with the variable resistor capacitor circuit, a programmable unijunction having its anode connected to the mid connection of said variable resistor capacitor circuit, its cathode connected through a current limiting resistor to the gate of the silicone-controlled rectifier, and its gate to the midconnection of said divider resistance circuit.
Claim 3
Dependent Claim
23 words
A circuit according to claim 1 having a capacitance connected across the gate of the unijunction and the cathode of said silicone-controlled rectifier.