The rolamite is a precision roller-band mechanism which was recently developed. The looseness of the rolamite geometry is a function of the band tension. The tight geometry and the slightly loose (small-deflection) geometry may be described by simple equations. Typical digital computer results are presented for the interroller clearance in the very loose (large-deflection) geometry. The rolamite may be made to generate forces if the band flexural rigidity is varied, or if it is precurved. An energy method is used to derive a general form of the force equation.

An approximate method for the design of electrodynamic oscillating gas compressors is developed. A linear spring-damper load is used to approximate the gas load at a single design point. Equations are presented for the linear load and for the design of components. A scheme is developed for the determination of design trends, and the trends are discussed. The design method is applied to two existing designs, an experimental and a commercial electrodynamic compressor, as an independent check.

In Part 1, electrodynamic drivers are designed for a single, linearized load. In this part, a digital computer simulation program is described. This program more accurately models the nonlinearities of the actual gas load, and can be used to check the performance of candidate designs over the expected range of loading conditions. Two selected designs, a laboratory research compressor and a commercial electrodynamic compressor, were discussed in Part 1. Simulation results for the former are discussed and compared to experimentally measured data. For the latter, a comparable design, also presented in Part 1, is simulated and the results are discussed.

Rolamite geometries having rectangular and diamond cutouts are presented as examples illustrating the use of the geometry analysis computer codes for accurately predicting force traces. The resultant traces are quite different from those predicted by the simple energy analysis, and agree well with experimental results.

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