Abstract: A vacuum tumbler for marinating food products within a liquid. The vacuum tumbler comprises a container having an interior wall, the interior wall defining a chamber for containing the liquid. A rib extends inwardly from the interior wall at least one-quarter of the distance across the chamber. A drive moves the container so that the rib brings the food products into and out of contact with the liquid, and a vacuum source creates a partial vacuum within the chamber.

Abstract: A high voltage switch assembly includes a pair of electrically conductive contacts (2, 2a, 2b, 2c, 2d, 2e) connectible in a power line from a high voltage source, and a portion of solid electrically insulating exposive material (3) forming an electrically insulating barrier extending between the contacts (2, 2a, 2b, 2c, 2d, 2e). On detonation of the explosive material at a point removed from the contacts a detonation wave is propagated from the detonation point through the explosive material (3), which as it passes between the contacts (2, 2a, 2b, 2c, 2d, 2e) establishes electrical conduction therebetween to initiate a switch closing action, the gaseous products of detonation following behind the detonation wave being electrically insulating and breaking electrical conduction between the contacts (2, 2a, 2b, 2c, 2d, 2e) to initiate a switch opening action.