Abstract: A combined active sealing system for connecting a panel to a frame of a door/window comprises a plurality of active sealing systems, a seal activation system, and an electronic control system. Each of the plurality of active sealing systems includes an anchor for engaging one of the panel and the frame, and an actuator connected to the anchor and for driving the anchor. In a closed position of the panel relative to the frame, the anchor is movable between a locked position and an unlocked position. The seal activation system is connected to at least one of the actuators of the plurality of active sealing systems. The electronic control system controls the seal activation system.

Abstract: A combined active sealing system for connecting a panel to a frame of a door/window comprises a plurality of active sealing systems, a seal activation system, and an electronic control system. Each of the plurality of active sealing systems includes an anchor for engaging one of the panel and the frame, and an actuator connected to the anchor and for driving the anchor. In a closed position of the panel relative to the frame, the anchor is movable between a locked position and an unlocked position. The seal activation system is connected to at least one of the actuators of the plurality of active sealing systems. The electronic control system controls the seal activation system.

Abstract: A device for monitoring the state of relay contacts is especially useful for controlling motor windings in air conditioning systems. When a first relay switch, which is operative to supply power to a first motor winding does not open as desired, a switch monitoring module responsively controls the second relay switch energization to prevent the second relay switch from being closed. This prevents power that would be supplied to a second motor winding from being also supplied to the first motor winding and causing potential damage to the first motor winding. A disclosed example includes an opto isolator that is energized only when the first relay switch is open as desired. The opto isolator controls an output signal to a second relay control portion, which only operates the second relay if the first relay has opened as required.

Abstract: An automated prefix dialing system is disclosed to allow a subscriber/user to automatically insert a predetermined prefix dialing code in certain outgoing telephone call situations. The system is electrically disposed between the telephone company's central office circuit and the subscriber's circuit. The system preferably comprises six sub-circuits: DC power path circuit (off-hook sensor circuit), shadow-ring detector circuit, isolation circuit, DTMF receiver circuit, DTMF generator circuit, and micro controller circuit. When not in use, no power is used by the system. The DC power path circuit, provides power received from the central office line to the various circuits and components of the system when the subscriber's phone is taken off-hook. Off-hook sensor circuitry detects when the telephone has been lifted either in response to an incoming call or to initiate an outgoing call.

Abstract: A device for monitoring the state of relay contacts is especially useful for controlling motor windings in air conditioning systems. When a first relay switch, which is operative to supply power to a first motor winding does not open as desired, a switch monitoring module responsively controls the second relay switch energization to prevent the second relay switch from being closed. This prevents power that would be supplied to a second motor winding from being also supplied to the first motor winding and causing potential damage to the first motor winding. A disclosed example includes an opto isolator that is energized only when the first relay switch is open as desired. The opto isolator controls an output signal to a second relay control portion, which only operates the second relay if the first relay has opened as required.