Improvements in or in connection with channel junctions, channel couplings and channel slips for use principally for the manholes of drains and sewers or for other like purposes such as those for water or chemical works

摘要

215,806. Green, E. A. Dec. 18, 1922. Spigot-and-socket joints held by cement and the like.-Channel junction pieces for manhole bottoms are made of the shape shown in Fig. 1 and couplings of the shape shown in Fig. 4. A piece for varying the angle of a connection consists of a wedge-shaped piece of cylindrical pipe having an angle of 10‹. A connecting pieces for channels, Fig. 9, has a socket as shown; the planes of the ends are inclined at 30‹. A reducing union is shown in Fig. 6.