18. Mechanical Vibration
A. Set an object into oscillation
Example:
• Electric carving knife with vibrating blades.
• To remove a cast from the body without injuring the skin, a conventional handsaw was replaced with a vibrating knife.
• Vibrate a casting mold while it is being filled to improve flow and structural properties.
B. If oscillation exists, increase its frequency, even as far as ultrasonic.
Example:
• Distribute power with vibration.
C. Use the resonant frequency.
Example:
• Destroy gall stones or kidney stones using ultrasonic resonance.
D. Instead of mechanical vibrations, use piezo electronic vibrators.
Example:
• Quartz crystal oscillations drive high accuracy clocks.
E. Use ultrasonic vibrations in conjunction with an electromagnetic field.
Example:
• Mixing alloys in an induction furnace.
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