Abstract: A computer support includes a base member to which an inner swing arm is pivotally mounted with an outer swing arm being pivotally mounted on the outer end of the inner swing arm and supporting a platform support by a lazy-susan bearing on its outer end. The pivotal connections are provided by pivot shafts over which pivot sleeves are positioned with upper and lower spaced roller bearing sets therebetween and a low-friction load bearing sleeve of substantial hardness engaging the lower end of each pivot sleeve to support same. Brake/lock means at each pivot permits retention of the arms in any desired rotational position in separate horizontal planes of movement.

Abstract: Vandal resistant playground equipment is provided including a pair of parallel U-shaped pipes provided with outwardly extending flange plates which support tubular sleeves which extend in transverse alignment from opposite sides of each flange plate. Horizontal pipes have opposite ends received in the tubular sleeves and extend between the flanges of the U-shaped pipes and are bolted to the pipes by bolts enclosed within one sleeve and extending through an aperture in the flange and engaged with a threaded plug in the end of each pipe.

Abstract: A type of playground device has vertical or horizontal support members with pipes perpendicular to such wooden support members extending between and mounted on the support members. Each pipe has a sharpened circular edge on each end which extends into a relatively large diameter inner pipe receiving portion of a transverse opening in one of the wooden support members; the sharp edge engages the bottom of the opening with the other side of the wooden support member having a relatively large outer bolt head receiving opening communicating with the inner pipe receiving opening through a central relatively small diameter opening portion. A bolt extends through the opening portions, which are axially aligned, into a threaded plug near the end of the pipe and pulls the sharp end edge of the pipe into the wood of the wooden support member upon tightening of the bolt to provide a construction that is both strong and vandal proof and protrusion free.

Abstract: A bench has transversely spaced metal frames supporting elongated wooden slats of metal angle members formed of two perpendicular metal plates; a bolt passes through one plate and an opening in the frame for attachment to the frame with a recess in each slat fitting over the head of the bolt and screws extending through screw openings in both plates to hold the slats in position.