Abstract: A method for low-voltage architectural anodizing of aluminum and aluminum alloy articles by using a direct anodizing current ranging for different machines from 10 kA up to 50 kA and more, plus a superimposed alternating current of industrial frequency. The combination of DC and AC reduces the DC voltage component across the tank to less than 10 VDC thus cutting the power consumption in the tank to half of the usual consumption in the straight DC anodizing. The resonant DC+AC power supply to feed the architectural anodizing machine is derived from the power supply claimed in the U.S. Pat. No. 4,170,739, by employing three one-phase transformers instead of one three-phase transformer, and three one-phase saturable core reactors instead of one three-phase saturable core reactor as a voltage control device. Magnetic cores of all transformers and saturable core reactors are therefore decoupled making it possible to supply the tank with the required level of the direct current component.

Abstract: The sole comprises a case in which a liquid-containing chamber is connected to a chamber containing sponge-like material. Pressure on the weight-bearing portion of the foot is redistributed isostatically by the liquid-containing chamber. The pressure created in the liquid-containing chamber is applied against chamber having the air-containing material. The compressed air-material chamber stores energy when the foot pushes against the ground and releases it, spring-like, into the liquid chamber when the foot moves from the ground. The sole also provides for use of unequal ceiling and floor surface areas in the liquid chamber for decreased or increased forces felt on the foot.

Abstract: The sole comprises a case in which a liquid-containing chamber is connected to an air-containing chamber by means of a resilient inner wall. Pressure on the weight-bearing portion of the foot is redistributed isostatically across the plantar portion of the foot by the liquid-containing chamber. The pressure created in the liquid-containing chamber is applied against the air chamber. The compressed air chamber and inner wall which presses against it store energy when the foot pushes against the ground and release it, spring-like, into the liquid chamber when the foot moves from the ground. The sole also provides for use of unequal ceiling and floor surface areas in the liquid chamber for decreased or increased forces felt on the foot.

Abstract: A power supply and a method for providing in a convenient and inexpensive way an unlimited range of direct currents with superimposed alternating sinusoidal or non-sinusoidal currents to a single load or to a number of loads in parallel. A novel power supply derived from a conventional one by purposely unbalancing AC potentials of load terminals so that an additional AC voltage drop appears across the load. This unbalancing is accomplished through changing AC potentials of one or both lead terminals by connecting one of the terminals to different points along a special unbalancing transformer winding and/or by connecting capacitors between a load terminal and different points of this unbalancing winding.

Abstract: A process for hard anodizing of aluminum and aluminum alloys by use of a low voltage having a DC component and a superimposed AC component. The electrolyte can have relatively low acid concentration and can be of higher temperature than usually employed for hard anodizing.

Abstract: A method and system for anodizing and particularly for hard anodizing of aluminum and aluminum alloy articles in which a wide range of operating voltages can be employed without danger to personnel and without burning of the articles. For continuous (dynamic) processing, a plurality of electrolyte-containing tanks are employed with an associated cooling system for maintaining the electrolyte at a low operating temperature. Each tank, cathode, electrolyte and cooling apparatus are electrically insulated from ground, while each cathode, which can be the tank itself, is connected to a predetermined negative potential of a power source which source comprises one or more separate power supplies. A conductive conveyor system is provided to carry articles through the several tanks and is connected to ground to which is also connected a positive terminal or terminals of the power source.