Abstract: A proximity switch for controlling lighting devices includes an oscillator operating at a nominal frequency. When a hand is positioned near a sensing antenna, the frequency of the oscillator decreases. The decrease in frequency is detected by a detection circuit which toggles a flip-flop. The output of the flip-flop controls a trigger circuit which provides a trigger input to a triac. When the trigger circuit is active, the triac conducts and provides power to an incandescent lamp. The power is alternatively toggled on and off each time the hand is brought into proximity to the sensing antenna.

Abstract: A small electronic module to regulate the power delivered to a lamp or similar appliance is plugged into the household electrical outlet and the lamp to be controlled is, in turn, plugged into the module. Each time the lamp is touched the power to the bulb increases by one step, typically in the sequence OFF, DIM, INTERMEDIATE, FULL, OFF. The module device operates by sensing the capacitance change when the lamp is touched and communication between the lamp and the device occurs through the lamp cord.

Abstract: The linear speed of a disc on a turntable with respect to the stylus of a pick-up device is maintained constant regardless of the radial position of the stylus. The speed control is accomplished through the use of a sensor mounted on a low-mass rod which is connected to and pivots about the same vertical axis as the stylus arm. The sensor is located below the turntable and provides pulses commensurate with radiation received from a timing disc on the underside of the turntable. The sensor produced pulses are delivered to electronic circuitry which continuously measures the linear speed of the timing disc, compares the measured speed to a reference standard, and adjusts the turntable electronically to keep the linear speed constant.

Abstract: A small electronic module to regulate the power delivered to a lamp or similar appliance is plugged into the household electrical outlet and the lamp to be controlled is, in turn, plugged into the module. Each time the lamp is touched the power to the bulb increases by one step, typically in the sequence OFF, DIM, INTERMEDIATE, FULL, OFF. The module device operates by sensing the capacitance change when the lamp is touched and communication between the lamp and the device occurs through the lamp cord.