Abstract: A mounting device for holding a first panel within an aperture in a second panel includes two frames. The first frame has connector studs with teeth extending across the width of each connector stud. The second frame contains complementary hollow receivers with latching structures for holding onto the teeth and effecting a permanent connection holding the two frames together. The frames, the connector studs and the hollow receivers are all flexible in order to facilitate easy connections of the two frames, and accommodate various types of stress.

Abstract: A system for orienting or biasing swings before installation uses a device having a bed adjusted to the desired orientation or bias. The swing is supported from a temporary support by its normal semi-elastic supports which are stretched in a manner to conform to the bias of the bed. In order to obtain the necessary amount of stretching in the semi-elastic support, the swing is forced into the bed during a process in which the bed is moved vertically to facilitate the stretching of the semi-elastic supports.

Abstract: A mounting device for holding a first panel within an aperture in a second panel includes two frames. The first frame has subconnectors with hook structures. The second frame is formed as a U-shape with flanges extending at angles greater than 90.degree. from the arms of the U-shape. When the two frames are connected to each other by virtue of the interaction of the hook structures and apertures in the arms of the U-shaped structure, the U-shaped structure exerts spring-like pressure on both the wall panel and the window being held within the wall panel.