Abstract: To provide a temporary cover for a maintenance hole (1, 31), over an edge (5) of which cables, hoses or other conduits (3, 83) extend, an inflatable balloon (10, 40, 50, 60, 70, 80) has hollow circumferential portions (41, 51, 61, 71, 81), for example generally in the shape of a tire or hollow disk, connected by a web (12), the balloon having a plan view configuration and dimension to fit into and, upon inflation, over the edge of the maintenance hole, and resiliently engaging around the edge of the maintenance hole, thereby preventing ingress of water, contaminants, animals and the like, without damage to the cables, hoses or conduits. Preferably, the balloon is a unitary structure made of distendable material such as rubber, plastic or the like, which may be fiber or textile reinforced.

Abstract: To protect doctors and other personnel from stray radiation when using therapeutic or diagnostic X-ray or other radiation apparatus, a lead apron is suspended from a dolly or carriage rolling in a track system secured to the ceiling in which the radiation apparatus is located. The dolly or carriage can be similar to that of already existing rolling equipment. It has a centrally positioned hanger arrangement which has a turning hanger secured to the dolly to which a tension spring is attached which supports the lead apron hanger, by having attached thereto an element generally in the form of a clothes hanger from which the apron, itself, is suspended by means of an adjustable strap suspension.