Abstract: A universal battery charger and recharger for electric batteries having different charging characteristics. The battery charger includes a microprocessor receiving inputs from current, voltage and temperature sensors for controlling the battery charging profile. A replaceable memory may be included to provide an appropriate charging profile for the battery to be charged. The supply current is varied responsively to the voltage across the battery which is measured when the supply current reaches a predetermined level or after a predetermined time.

Abstract: A universal battery charger and recharger for electric batteries having different charging characteristics. The battery charger includes a microprocessor receiving inputs from current, voltage and temperature sensors for controlling the battery charging profile. A replaceable memory may be included to provide an appropriate charging profile for the battery to be charged. The supply current is varied responsively to the voltage across the battery which is measured when the supply current reaches a predetermined level or after a predetermined time.

Abstract: A bendable wave guide comprising a bendable tubular section for the propagation of microwaves through the length of the section is disclosed. The bendable section is made of a highly conductive and ductile metal and, in the preferred embodiment, has a rectangular cross section. The bendable section has a smooth inner surface and an outer surface a portion of which is milled to have a series of transverse circular or spiral ridges and furrows along its length. When the wave guide is used, that area of the surface where the furrows are is deformed to accommodate bending, while the ridges maintain the rectangular cross section of the wave guide. A pair of coupling flanges are secured to the ends of the bendable section and allow the wave guide to be connected to a microwave unit.

Abstract: A flexible multilayer wave guide and method of making the same is disclosed. The wave guide comprises a flexible section for propagating microwaves and a pair of coupling elements for connection to existing microwave units. The flexible section is corrugated and has an outer layer made of a flexible and strong metal. Its inner surface comprises a relatively thin layer of a highly conductive metal which is supported by the outer layer and gives the wave guide the desired electrical properties.A method of fabrication involving the deposition of the inner conductive layer and the outer support layer of the wave guide on an arbor is also disclosed. This technique allows the fabrication of a wave guide with a far greater number of convolutions along its length than was possible using prior art mechanical manufacturing methods. In the preferred embodiment, the arbor is made of metal, and the inner layer and outer layer are successively deposited on the arbor by electrodeposition.