Abstract: A mechanical and electrical connecting assembly between the surfaces of two adjacent bodies comprises, on the male part, a projecting screw driven by a magnetic motivator. A threaded cavity, on the female part, intimately engages the screw to form a rigid mechanical link between the two bodies. A washer terminal in rotative contact with the screw can accept a soldered connection with an electrical conductor. A plug terminal at the end of the cavity closes an electrical path with a conductor soldered to it. A remote outside actuator including a spinning magnet excites and causes the magnetic motivator to rotate and drive the screw either into or out of the cavity and electrical contact with the plug.

Abstract: A modular roofing system includes a lower set of co-adjacent rectangular panels locked together by an upper set of co-adjacent hexagonal tiles made from a light-weight rigid urethane foam material coated with a durable outer layer of non-foam polyurethane plastic. The tiles can carry photovoltaic cells that interconnect at opposite ends to adjacent tiles. The cells can be replaced on the existing installed tiles using an aligned locking structure for aligning electrical contacts and sealing the cells. Length adjustable modular gutter tiles terminate an array of tiles along a lower roof edge.