Abstract: A retaining wall construction using courses of lightweight hollow timbers molded from plastic and having interfit portions and the adjacent bottom and top edges which seal the spaces between the courses. Vertical whaler posts connected to the rear face of the timbers and connecting bars extending to the rear of the wall equipped with deadman paddles stabilize the wall. Splicer pieces are received in each set of abutting ends of the timbers and are connected to the respective timbers.

Abstract: A rail tie and track-tie connection includes a molded plastic body member having molded plastic cover pieces attached to the body member, with lip portions engaging and capturing bottom flanges on the track rails. The body member may be hollow with a filler mass supporting the sides and cross bolts providing further reinforcement. A detector circuit for electronically detecting removal of a cover piece is located within the tie body member.

Abstract: An apparatus for effecting electrical connection between the main machine and a module containing the apparatus for advancing a sheet through the transfer zone and to registration for information developed on the photoreceptor belt. The connector on the main machine is mounted to permit engagement with a complementary connector on the module, but provide for movement when the module is raised slightly to contact the photoreceptor module. The apparatus minimizes which otherwise would inhibit this upward movement and detract from proper operation of the machine and the quality of the copy produced.

Abstract: A chuck key storage apparatus for use with a drilling machine for conveniently storing a chuck key. The apparatus, and thus the chuck key, is movable between a stored position and a functional position. In the stored position, the chuck key is positioned remote from a chuck of the drilling machine, and in the functional position the chuck key is located to engage the chuck.