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Interested in disability history? Check out what happened Today in AT History!

August 21

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  • 1972 - William Jones of Cleveland Machine Controls, Inc. files a patent for a "motor control system for controlling both direction and speed of a DC motor. The system is particularly applicable for controlling direction and speed of a pair of DC reversible motors which independently drive spaced apart wheels on a vehicle, such as a motorized wheelchair." The control mechanism is a joystick, previously used mostly in airplanes.[1]


Deaths

  • 1901 - Adolf Eugen Fick - German physiologist, credited with the invention of contact lenses.


References

  1. http://www.google.com/patents?id=WMQxAAAAEBAJ