Abstract: A wall hanger includes a fastening member, a linking member including a top wall, a lateral wall, and a bottom wall, and a sleeving member. A first connecting portion is at the fastening member. A second connecting portion is at the top wall to connect with the first connecting portion. The lateral wall is extending vertically toward a first direction distant from the top wall and has first teeth. The bottom wall is extending toward the first direction from the lateral wall and is parallel to the top wall. The sleeving member includes a base member, a supporting wall standing on the base member, and an abutting wall extending from the supporting wall and parallel to the base member. A groove is defined by the base member, the supporting wall, and the abutting wall. The top surface of the abutting wall has second teeth.

Abstract: A wall hanger includes a fastening member, a linking member including a top wall, a lateral wall, and a bottom wall, and a sleeving member. A first connecting portion is at the fastening member. A second connecting portion is at the top wall to connect with the first connecting portion. The lateral wall is extending vertically toward a first direction distant from the top wall and has first teeth. The bottom wall is extending toward the first direction from the lateral wall and is parallel to the top wall. The sleeving member includes a base member, a supporting wall standing on the base member, and an abutting wall extending from the supporting wall and parallel to the base member. A groove is defined by the base member, the supporting wall, and the abutting wall. The top surface of the abutting wall has second teeth.

Abstract: An object positioning system includes an object positioning device and a detecting device. The object positioning device includes one or more magnetic bars forming a marked magnetic field. The detecting device includes a magnetic field generating unit for outputting a detecting magnetic field according to a detecting signal in an electromagnetic conversion process, and an analyzing unit for detecting whether the detecting signal varies when the detecting magnetic field passes the marked magnetic field along a moving direction. The analyzing unit analyzes whether a character of the variation corresponds to the marked magnetic field and accordingly outputs a detecting result. When people are trapped under snow or collapsed buildings because of an avalanche or an earthquake, the system can be utilized to find out trapped people. The system can also be utilized to find out objects buried underground. Money and time consumed by mass excavation can be saved.

Abstract: A wall mount hanger includes a hanging section and a sleeve section. The hanging section is protrusively disposed on a wall surface and has a first arc surface and a stop portion. The first arc surface has plural protruding teeth, and the stop portion is protrusively disposed on the first arc surface. The sleeve section has a first surface and a second surface lower than the first surface. A second arc surface and a slot are disposed between the first surface and the second surface. The second arc surface has plural protruding teeth. The protruding teeth of the second arc surface are engaged with the protruding teeth of the first arc surface. Since the sleeve section and the hanging section are engaged with each other through the protruding teeth, the sleeve section can be rotated fixed to a required angle relative to the hanging section.