The present disclosure describes various systems, devices, and methods configured to retrieve a fixed-wing aircraft from free flight using a flexible capture member and a monopole assembly.

The system of the present invention is a tilt over mast that is easy to construct from the ground and permits azimuthal adjustments from the ground with the mast elevated to working heights. The system used for calibrating a directional antenna and includes two or more mast sections, namely a base member, a mid member, and a top member. The mid member may be pivotally coupled about the base member at a number of positions. The top member is coupled to an opposing end of the mid member and supports the desired equipment. A method of constructing and operating the system is described.

Pool protection systems are disclosed. In one particular embodiment, a pool protection system may include a platform fitted in a pool, oriented substantially parallel to a surface of water in the pool, and configured to move vertically in the pool; one or more motors mechanically connected to the platform; and a controller in communication with the one or more motors.

Drone (5) which comprises a plurality of propellers (16) driven by motors (17) supported by at least one structure (18) with a winch (8) provided with a drum which can rotate by means of a motor (22) to unwind or wind a suspended cable (6), characterized in that the structure (18) comprises a central seat (19) in which the winch (8) is arranged, so that the center of mass of the drone (5) falls into the drum of the winch (8). The present description also relates to a method of controlling the attitude of the drone (5).

The present application relates to the technical field of lifting equipment, and provides a traction machine and a lifting equipment. The traction machine includes traction pulleys, traction ropes driven by the traction pulleys and fixed pulleys for changing directions of the traction ropes. The fixed pulley is provided with a sensor sensing member rotating with the fixed pulley, a traction machine sensor is arranged beside the fixed pulley; the traction machine sensor is configured to detect a rotation speed of the sensor sensing member, and send the rotation speed to a controller of the traction machine; the controller controls a rotation of the traction pulley according to detected data of the traction machine sensor. Since this kind of traction machine is provided with the sensor sensing member and the traction machine sensor, it is capable of detecting whether the traction machine has an abnormal operation, and stopping the traction machine immediately in an abnormal state.

A UAV tether management system comprising: a tether-wound spool rotatably mounted on a base station, a free-pivoting angle arm, and an angle arm encoder, wherein the tether is configured to transfer power from the base station to the UAV while the UAV is in flight, and the angle arm comprises a tether guide mounted to a proximal end of the angle arm such that the tether passes through the tether guide as the tether pays out of, or is taken up by, the spool, wherein the angle arm further comprises a counter weight mounted to a distal end of the angle arm such that a center of mass of the angle arm is aligned with the spool's axis of rotation, and wherein the angle arm encoder is configured to measure an offset angle of the angle arm.

A forestry winch may include a rope drum driven by a drive motor, wherein a rope is wound up on the rope drum, wherein the rope drum is functionally connected with a brake device, wherein the brake device is in the form of a spring-loaded brake which is impinged by a spring device toward a braking position and by a hydraulic brake release pressure present in a brake release pressure line toward a release position, wherein the drive motor is in the form of a hydraulic motor which is connected by a first pressure medium line and a second pressure medium line to a multi-port control valve device controlling the drive motor, and a bypass valve device connecting the first and second pressure medium lines and is located in a connecting line connecting the first and second pressure medium lines and has a closed position and a flow position.

A switching assembly for rope-pulling equipment including mechanisms for holding an electrically-operated power tool for rotating a capstan about an axis and which power tool includes a depressible ON/OFF switch utilizes an actuator having a switch-engaging portion which is mounted for pivotal movement between a first condition at which the switch of the power tool is in an OFF position and a second condition at which the switch of the power tool is depressed by the switch-engaging portion to switch the power tool ON. The actuator further includes a rope-engaging section so that by wrapping a section of rope to be pulled about the capstan, routing an end of the rope about the rope-engaging section and then appropriately pulling upon the end of the rope, the actuator is pivoted from the first to the second condition, and the rope is advanced along the equipment by the rotating capstan.

A wire puller may be provided. The wire puller may comprise a middle portion, a restraint frame, and a front portion. The middle portion may comprise a gear box, a front bracket, a back bracket, and a capstan. The gear box may comprise a drive shaft and the capstan may comprise a hook pin. The restraint frame may be attached to the back bracket. The front portion may be attached to the front bracket. The front portion may comprise a pivot frame, a tube, an arm, a first side plate, a second side plate, a roller, and a flip out support. The pivot frame may comprise a locking mechanism.

The present disclosure describes various systems, devices, and methods configured to retrieve a fixed-wing aircraft from free flight using a flexible capture member and a monopole assembly.