The invention relates to protective waterproof membranous sheeting which will prevent the passage of water and corrosive salt solutions into structures. The protection membrane comprises a bituminous adhesive waterproof sheet 1, a flexible polymeric protection grid 2 and a release sheet 3. The waterproof sheet 1 may comprise a fibre core in a matrix of a polymer modified bitumen polymer. The protection grid is partially embedded in the waterproof sheet 1, and is formed with drainage channels 13,...

There is described an apparatus for the corrosion protection of containers for the long time storage of radioactive materials, especially of spent fuel elements, in suitable geological formations which avoid corrosion of the container even with unexpected occurrence of water, or at least delay and minimize the corrosion. The apparatus consists essentially of sacrificial anodes 2 which are conductively joined to the containers 1 via connections 3.

A cover in the form of a blanket has a protective grid of phosphorescent material that when exposed to light and placed in a dark environment emits light for a period of time. The protective grid is a pattern of intersecting ribbons of phosphorescent material anchored to and covering substantially one surface of a fabric. The protective grid provides a visual light shield that creates an image of protection and is useable for amusement and entertainment.

Method and device for indicating overload are provided for a load suspended from a hoist. The hoist comprises a slip-ring induction motor (1). The input power together with the angular acceleration of the motor are metered. Then the metered values are compiled in a computer (5) by means of a suggested formula in order to estimate the hook load. The lift will be stopped, if the hook load continuously exceeds a predetermined value during a predetermined time.

Protection scissors comprising blades with sharpened outer edges and handles functioning as brass knuckles.

Cathodic corrosion protection of a metallic structure in contact with the earth employs a backfill material which is a mixture of a carbonaceous solid and a clay. The backfill mixture is used to fill around at least one anode which is positioned in a borehole in the earth. A DC voltage is applied to the metallic structure and anode to provide the corrosion protection. The backfill mixture is highly electrically conductive and is relatively impermeable to water so as to assist in preventing inter...

A distance relay, for indicating single phase to ground faults on a polyphase electric power transmission system, having guard zone comparators (17,18,19) generating a first guard zone quadrilateral characteristic (21,23,25,27) in respect of each phase of the system and additional comparators (43,45,47) cooperating with the guard zone comparators (17,18,19) for generating a second main quadrilateral characteristic (23,25,27,49) in respect of each phase of the system, and a logic circuit arrangem...

This invention relates to a protection device adapted for protecting objects. Primarily, the protection device of this invention is intended to protect bales of hay, straw or similar materials. The protection device of this invention includes a series of overlapping elongated slats with projections on the side adapted to abut the bales being protected to insure that the protection device is slightly removed from the contents of the bales so that air may pass between the underside of the protecti...

Corrosion protection systems which make use of a barrier which is placed between a corrodible substrate and a counter-electrode. The barrier can provide more uniform current distribution on the substrate, and/or enable the counter-electrode to be more easily maintained or replaced, and/or reduce the rate at which the current density on an elongate electrode changes with distance from the power source, and/or provide a controlled environment around the electrode to improve its efficiency.

A security installation includes a primary barrier section protruding upwardly from a substrate and extending along the substrate in a first direction, a secondary barrier section protruding from, and extending along, the primary section, with the secondary barrier section being movable with respect to the primary barrier section in a second direction extending transversely to the first direction, and sensing means for sensing movement in the second direction of at least a portion of the seconda...