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
DL control channel structure enhancement
Autonomous primary-mirror synchronized reset
Method and system for a low-power client in a wide area network
Multiple CQI feedback for cellular networks
Fluid handling structure, a lithographic apparatus and a device manufacturing method
Catalyst composition with nanometer crystallites for slurry hydrocracking
  Randomly Featured Patents
Method and device for supporting the take-off rotation of an aircraft
Devices for vulnerable plaque detection
Portable information processing apparatus
Video tape recorder
Recording apparatus
Computer aided detection of pulmonary embolism with local characteristic features in CT angiography
Poinsettia plant named `786`
Loropetalum named `Kurobijin`
Positive feedback error diffusion signal processing
Method of processing mail having multiple identifiers