Other

The University of Arizona

Randolph James Crowson, Ii

Bradley Evan Paden

David Brian Paden

Tom Dragnes

Thomas Lange Vincent

A hinged electrodynamic transducer apparatus is disclosed for providing oscillating and/or vibrational motion. The hinged transducer of the present invention is configured to be robust and low profile for installation under chairs, seats, and other items of furniture such that it can impart vibrational motion capable of being sensed by the human body (DC to approximately 500 Hz.

Hinged motion transducer

An electrodynamic shaker apparatus is disclosed for providing shaking and/or vibrational motion. The shaker includes armature and stator assemblies as well as a distributed spring assembly. The shaker apparatus of the present invention is robust, supports increased off-center loads, and has a low profile such that it may be easily placed under an item of furniture in order to impart vibrational motion in response to electrical signals from a variety of sources.

Robust low profile shaker

An apparatus has a ball that bounces vertically on a vibrating piston. The system demonstrates the complex dynamics impact systems for education and research in dynamical systems theory and feedback control.

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Santa Barbara, CA, United States of America

Randolph James Crowson, Ii