Resources Contact Us Home
Control device for a swing

Image Number 3 for United States Patent #7905791.

Various embodiments of the invention include a motor system for driving a swing and controlling the speed and/or amplitude of the swing. In one embodiment, the motor system includes a DC motor, a swing velocity sensor system, and a swing velocity control circuit. The DC motor drives the swing through at least one fill swing cycle, and then the motor is allowed to free-wheel for at least a half swing cycle. During the free-wheeling half cycle, the swing velocity sensor system measures the velocity of the swing and compares the measured velocity to a goal velocity. The control circuit increases or decreases the velocity depending on this comparison. In other embodiments, the system includes a swing amplitude sensor system that measures the amplitude of the swing and a swing amplitude control circuit that compares the measured amplitude to a goal amplitude.

  Recently Added Patents
Sparse data compression
Method and apparatus for representing sensory effects and computer readable recording medium storing user sensory preference metadata
Multi-layer, microporous polyolefin membrane, its production method, battery separator and battery
Method and apparatus for managing network traffic
Power collecting device, power measuring device, and power collecting method
Atmospheric treater with roller confined discharge chamber
RFID device using single antenna for multiple resonant frequency ranges
  Randomly Featured Patents
Hybrid vehicles incorporating turbochargers
Eyeglass comforter
Self cleaning, pressure responsive emitter valve for soil irrigation
Promotion of fibrous tissue growth in fallopian tubes for female sterilization
Exhaust manifold assembly in an internal combustion engine
Method of treating weight loss disorders
Image forming apparatus and image forming method
Bicycle bottom bracket force sensor
Manufacturing method of semiconductor device, including differently spaced bump electrode arrays