ROTO-OSCILLATOR
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United States of America Patent
Stats
-
N/A
Issued Date -
Jan 16, 2003
app pub date -
Jul 14, 2001
filing date -
Jul 14, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A roto-oscillator and a velocity-sensing driver producing vibrotactile skin stimulation are disclosed. Driver current flowing through a coil produces a magnetic field that interacts with a roto-oscillating permanent magnet. Shaft supported and shaft-less embodiments are disclosed. Spring linkages are used to constrain the unenergized angular position of the roto-oscillating permanent magnet with respect to the coil current-induced magnetic field, such as to substantially optimize a vibratory torque generation. Spring linkages further serve to store the kinetic energy of roto-oscillation and to determine the optimum frequency of oscillation and the direction of vibrotactile stimulus. A velocity sensing circuit is used to provide a feedback signal for the roto-oscillator driver.
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