Abstract: A system for preventing a rack fault condition of a passenger boarding bridge includes a plurality of electromagnetic sensors that are disposed for sensing separately a rotational movement of each one of a first and a second electromechanical screw jack, one electromechanical screw jack located adjacent to each lateral sidewall surface of the passenger boarding bridge. The system also includes a control circuit in communication with the plurality of electromagnetic sensors. The control circuit receives signals from the sensors, which signals are indicative of the sensed rotational movement of each one of the first and second electromechanical screw jacks. A value is determined relating to a rotational synchronization of the first and second electromechanical screw jacks. When the determined value is outside a predetermined range of threshold values, a control signal is provided for affecting the rotational movement of at least one of the first and second electromechanical screw jacks.

Abstract: A door seal assembly for an armored vehicle includes a first flange extending around the periphery of a door panel and protruding from a cab-facing side thereof. The first flange extends toward the exterior surface of the armored vehicle when the door panel is in a secured-closed condition. A second flange also protrudes from the cab-facing side of the door panel and extends into the opening of the armored vehicle when the door panel is in the secured-closed condition. The second flange being nested within the first flange and spaced-apart therefrom so as to form a channel between the first flange and the second flange and extending around the door panel along the cab-facing side thereof. A third flange protrudes from the exterior surface of the armored vehicle and extends about the opening thereof. The third flange is received within the channel that is defined between the first flange and the second flange when the door panel is in the secured-closed condition.

Abstract: A system for preventing a rack fault condition of a passenger boarding bridge includes a plurality of electromagnetic sensors that are disposed for sensing separately a rotational movement of each one of a first and a second electromechanical screw jack, one electromechanical screw jack located adjacent to each lateral sidewall surface of the passenger boarding bridge. The system also includes a control circuit in communication with the plurality of electromagnetic sensors. The control circuit receives signals from the sensors, which signals are indicative of the sensed rotational movement of each one of the first and second electromechanical screw jacks. A value is determined relating to a rotational synchronization of the first and second electromechanical screw jacks. When the determined value is outside a predetermined range of threshold values, a control signal is provided for affecting the rotational movement of at least one of the first and second electromechanical screw jacks.