Abstract: A non-metallic spring clamp (10). The spring clamp (10) includes a first body member (13) having a jaw end (20) and a handle end (21), and a second body member (14) having a jaw end (20) and a handle end (21). A bridging member (15) is integral with the first body member (13) and second body member (14), and is interposed between the jaw end (20) and handle end (21) of each. A spring (12) is interposed between the respective handle ends (21) so as to engage each handle end (21). Means (27) are provided to retain the spring (12) in engagement with each handle end (21). Means (26), likewise, are provided to laterally support the spring (12) on each handle end (21).

Abstract: An inexpensive, lightweight, overhead lighting system positions fluorescent tubes and their associated ballasts in slotted plastic pipes arranged in end to end relation and connected and supported by plastic pipe fittings, including ells, tees, angles and cross shaped sections which are in turn suspended beneath a ceiling or roof of a structure by appropriate support rods and tubes.

Abstract: A vacuum or pressure coupling device comprises mateable body members, each provided with means for connection to tubular members and at least one of the body members being formed of material sufficiently resilient and distorable for maintaining the body members in sealing engagement with one another.