Abstract: An electric accumulator or storage cell whose positive and negative plates are composed of a multiplicity of thin lead plates or lead foils which are spaced apart from thin separators in a receptacle adapted to receive an electrolyte (dilute sulfuric acid), the receptacle having dimensions closely conforming to those of the stacked plates. The thin lead plates or foils which form both the positive and negative electrodes are formed at juxtaposed regions with exactly coextensive electrically nonconducting and electrolyte impermeable masks of a material adhering strongly to the electrodes.

Abstract: A collector of solar energy comprises an array of contiguous transparent blocks, arranged in one or more layers or tiers, resting on a thermally conductive supporting plate which overlies a system of conduits for the circulation of a heat-carrying fluid such as water. Each block consists of a thin-walled hollow glass body of generally prismatic shape with a broad concave undersurface which, in the case of the lowest tier, makes only line contact with its supporting surface and is largely separated from that surface by an intervening dead-air space minimizing conductive heat transfer therebetween. A nipple at one end face, used for the blowing of the glass bodies, may be received in a complementary recess of a juxtaposed end face of an adjoining body.

Abstract: A reservoir is subdivided by a plurality of partitions into a plurality of water-filled compartments. The lower region of at least one of the compartments is connectable to a source of cool water and the upper region of at least one other compartment is usable as a supply of relatively warm water. Relatively cool water may also be withdrawn from the one compartment, heated and introduced into the upper region of the other compartment. The partitions may form conduits opening at one end into the upper region of the compartments to one side of the partition and at the other end into the lower region of the compartment on the other side so that warm water may flow through this partition from the top of one compartment to the bottom of the next compartment or cool water may flow from the bottom of one compartment up and into the top of the next compartment.FIELD OF THE INVENTIONThe present invention relates to a system for storing heat.