Abstract: A retrievable device includes a frame with an open bottom to receive therein a monitor and at least one arm with a first distal end pivotally connected to the frame and a second distal end slidably received in the passage in the monitor. The monitor is able to be slidably and pivotally received in the frame. An elastic element is securely received in the guiding tracks in the frame so that when the guiding elements of the monitor are moving inside the guiding tracks, the elastic element is able to provide a friction to stop the movement of the guiding elements to position the monitor relative to the frame.

Abstract: A retrievable device includes a frame with an open bottom to receive therein a monitor and at least one arm with a first distal end pivotally connected to the frame and a second distal end slidably received in the passage in the monitor. The monitor is able to be slidably and pivotally received in the frame. An elastic element is securely received in the guiding tracks in the frame so that when the guiding elements of the monitor are moving inside the guiding tracks, the elastic element is able to provide a friction to stop the movement of the guiding elements to position the monitor relative to the frame.

Abstract: A compass for mobile parabolic antenna includes a compass sphere having a transparent shell with an elevation dial and a magnetic core encapsulated by the transparent shell with fluid filled therebetween with a bubble enclosed within the transparent shell and a directional mark pointing to a fixed direction on the magnetic core, an annular plate having a location dial and a satellite name dial provided on edges of the plate, a cover plate having a central hole and a plurality of arcuated grooves, and a base plate having a circular depression, a plurality of arcuated recesses corresponding to the grooves on the cover plate defined in the depression, and a central bore corresponding to the central hole on the cover plate so that the compass sphere can be secured within the central hole and the central bore and the annular plate can be rotatably received by the circular depression when the cover plate couples with the base plate.