Abstract: A support device for stabilizing a hanging wall above a floating slab. In areas having expansive soils, basement slabs and surface slabs will rise and fall with increases and decreases in soil moisture. Walls mounted on such slabs would be damaged when the slab rises. Therefore, such walls are made to hang from overhead structures such as joists with the bottom wall end spaced from the slab. The support device in mounted on a bottom plate within such a wall above a base plate fastened to the slab. The device includes a bracket having a flange for fastening to the bottom plate and an tubular extension extending downwardly through a hole in the bottom plate. A sleeve slidingly fits through the tubular extension and includes at least one nail (preferably two nails) extending through the sleeve and engaging the base plate. When the nails are hammered into the base plate, the wall can move up and down with the slab, but is stabilized against lateral movement due to lateral forces on the wall.

Abstract: A tape playback unit is designed to transmit messages recorded on an endless loop dual channel recording tape. The tape contains a series of independent messages recorded on one channel and stop-start signals coordinated with the beginning and end of each message on the other channel. A multiple of receiving units each having an audio receiver as in a telephone receiver, hereafter referred to as an earphone, are connected to said playback unit and the independent messages contained on the tape are transmitted to the earphones. A control unit associated with each receiving unit intercepts the message being transmitted by the playback unit and permits transmitting thereof to the earphone only upon activation of a switch associated with the receiving unit, e.g. activated by a coin. The control unit further includes a timer associated with detecting means for detecting the beginning and end of each message, i.e. it detects the stop-start signals on said other channel.