Machine derived contents note: 1. What is an Ultrasonic Motor? -- 2. Theoretical Treatment of Component Elements -- 3. The Piezoelectric Element and Vibrator -- 4. Theory and Experiments on the Wedge-type Motor -- 5. Theory of the Ultrasonic Wave Motor -- 6. Equivalent-Circuit Analysis for the Travelling-Wave Motor -- 7. Design, Assembly and Testing of a Prototype Ultrasonic Motor -- 8. Comparison with Electromagnetic Motors -- Autobiographical Notes (Toshiiku Sashida) -- Index