Abstract: A navigation light control system that includes a network of navigation light control circuits interconnected and each control circuit further connected to operate at least one navigation light. Each control circuit includes a start circuit that provides an initiation signal upon the detection of a loss of sunlight. The initiation signal is input to a first timer that provides a begin signal after a preselected time. The begin signal is input to a second timer that provides an operation signal to a lamp driver circuit for flashing one or more of the lamps in response. The control circuit further includes a coupling circuit that couples the control circuits together in the network and receives a slave indication signal from one of the other control circuits that disables the first and second timers in response and further provides the slave indication signal to the lamp driver to flash one or more of the lamps.

Abstract: An alternating current lampchanger control circuit for driving a rotatable turret having a plurality of lamps, such as used in a navigational light. An input receives pulsed alternating current signals and is connected to a power circuit including fixed contacts for supplying the pulsed signals to one of the lamps in the turret. A lampout sensing circuit includes a transformer which has a primary in the lamp power circuit and has a rectifier connected to the transformer secondary. Switching means are connected to the rectifier and are actuated to an on position by a lamp failure. An alternating current turret motor is connected to the input or to a continuous source of alternating electrical current through the switching means for rotating the turret upon a lamp failure. The switching means may include a first triac controlling a second triac connected to the motor. Third switching means are included in a feedback loop to provide an alternating current drive for the motor in a continuous mode.