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The classification of mechanisms is reviewed and their kinematic structure and graph representation discussed. Mechanism creation based on the separation of structure from function is illustrated for shaft couplings and other devices. The use and significance of this procedure in mechanical design and interpretation of patents is shown.

The method of separation of kinematic structure and function has been used in the development of an optimum variable-stroke engine mechanism for automotive power plants. A systematic search procedure resulted in the structures of 39 mechanisms, one of which was judged optimal (U.S. Patent No. 4,270,495—reference [13]). The prior art, as disclosed in a number of patents and other publications, was evaluated and shown to be either included in the mechanisms created in the course of the search, or deliberately excluded by the search specification. The general nature of the approach, which combines mathematical and creative approaches, is believed to be useful in mechanical design.

The magnetohydrodynamic lubrication flow in an externally pressurized thrust bearing is investigated both theoretically and experimentally. The ordinary magnetohydrodynamic lubrication theory for this bearing is extended to include fluid inertia effects. Very good agreement is obtained between theory and experiment.

Magnetohydrodynamic squeeze films are investigated theoretically and experimentally. The theory of magnetohydrodynamic lubrication as applied to squeeze films is extended to include fluid-inertia effects and buoyant forces. Excellent agreement is obtained between theory and experiment.