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
Cycloalkylamine substituted isoquinoline and isoquinolinone derivatives
Assigning runtime artifacts to software components
Methods for detecting DNA-binding proteins
Vehicle motion control device
Polypeptides having beta-glucosidase activity and beta-xylosidase activity and polynucleotides encoding same
Ion generation using wetted porous material
Distributed IP-PBX signal processing
  Randomly Featured Patents
Digital photographing apparatus that adaptively displays icons and method of controlling the digital photographing apparatus
Slab formwork system
Outside air thermometer
Method for producing biphenyls
Exhaust gas recirculation system with control apparatus for exhaust gas flow control valve
Fuel tank
Cam bracket and headrail system
Alkaline earth metal-basic silicate particle
Positive resist composition for immersion exposure and pattern-forming method using the same
Apparatus for blow moulding plastic preforms having a reduced dead volume