Abstract: A motor starting circuit in which a triac connected in series with the starting winding of the motor is gated into conduction for only a preselected time period following motor start-up. A switching circuit, in parallel with the serially connected triac and starting winding, includes an SCR which provides a low resistance signal path to the gate of the triac at such time that the SCR is in a conducting state. The SCR is gated by a resistance network and the time period is established by an RC circuit which gates a switch at the end of the selected time period to short out the portion of the resistance net work to which the gate of the SCR is connected so as to turn off the SCR and leave a high resistance path through the switching circuit to the gate of the triac.

Abstract: A power control circuit which receives an AC line signal input and includes operational amplifiers which receive the AC line signal after it has been rectified. Each operational amplifier respectively operates as a zero crossing circuit which produces a square synchronous pulsed signal, a ramp generator which receives the square synchronous pulsed signal and produces a sawtooth wave signal, a comparator which receives the sawtooth wave signal and produces a synchronous pulsed width modulated output signal which can be varied. A power bridge circuit receives the AC line signal input and is triggered by the pulsed width modulated signal to rectify the AC line input to pass a pulsed width modulated signal to the load. The signal passed to the load is varied by the setting of the comparator.

Abstract: A two-terminal in-line time delay device incorporating upon the initiation of in-put power into the device a pulsing component which, after a selected time delay, provides a gating pulse for a line-to-load series connected SCR. As the SCR is switched on, a connected transistor is turned on to provide a continuous gating current for the SCR which allows load-to-line current flow.

Abstract: A motor starting circuit in which a triac connected in series with the starting winding of the motor is gated into conduction for only a preselected time period following motor start-up. A switching circuit, in parallel with the serially connected triac and starting winding, includes a first SCR which provides a low resistance signal path to the gate of the triac at such time that the first SCR is in a conducting state. The first SCR is gated by a resistance network and the time period is established by an RC circuit which gates a second SCR, at the end of the selected time period, to short out the portion of the resistance network to which the gate of the first SCR is connected so as to turn off the first SCR and leave a high resistance path through the switching circuit to the gate of the triac.

Abstract: Method and apparatus for treating seeds, such as corn, soy beans and rice, in which the seeds are first coated with a mixture of water and enzyme and then subjected to a series of electrical potentials that causes water, ion particles, and nitrogen components to be impregnated within the seed for the purpose of improving the embryonic and growth potential of the seeds.

Abstract: A high frequency battery charger operable from a 120 volt AC line power source which is rectified and converted by a blocking oscillator into 20-200 Khz rectified output for battery charging. A sensor for determining full battery charge serves as a power cut off to the battery with provision, if desired, for continued trickle charge of the battery.

Abstract: A power oscillator utilizing one or more field effect transistors in conjunction with a tank circuit.

Abstract: A high frequency power supply with inductive coupling and a SCR starter to light two fluorescent lamps is described. It supplies high frequency square waves to the fluorescent lamp for improved light output, efficiency and stability of operation. The rectified line voltage from a full wave rectifier is fed via a SCR starter to two transistors that form an inverter circuit. The inverter circuit is coupled to a ferrite core autotransformer. The secondary windings of the autotransformer are used to heat the filaments of the electrodes of the fluorescent lamp, and to form a reactive coupling along with inductors for stabilizing the arc discharge of the fluorescent lamp.