Abstract: Described herein is a device for converting such forms of mechanical energy that comprise even slow and random movements, such as the waves of the sea, the flow of a river, the blowing of the wind, and the thermal expansion caused by the radiation of the sun, to a more useful form of high-speed rotation. The device comprises a shaft member rotatable in one direction only in relation to a frame and comprising a crank. A longitudinal actuating member is at one end connected to the shaft member and arranged to rotate the shaft member by means of its movements in relation to the frame. A spring connected at one end to the frame and at the other end to the crank stores the potential energy caused by the movements of the actuating member and releases it by causing the crank to turn the shaft member into rotation when the crank has passed a dead point determined by the actuating direction of the spring.

Abstract: A battery cell for a primary battery, particularly a flat cell battery to be activated on being taken into use, e.g., when submerged into water. The battery cell comprises a positive current collector and a negative electrode. A separator layer which, being in contact with the negative electrode, is disposed between said negative electrode and the positive current collector. A depolarizing layer containing a depolarizing agent is disposed between the positive current collector and the separate layer. An intermediate layer of a porous, electrically insulating, and water-absorbing material is disposed next to the positive current collector and arranged in contact with the depolarizing agent.