Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
OFDM control signaling in the presence of timing asynchronization in a peer-to-peer network
Channel marking for chip mark overflow and calibration errors
Signal processor and signal processing method
Retrievable outgoing audio messaging
Lubricating oil compositions
Architecture for accelerated computer processing
Fuser member having composite outer layer
  Randomly Featured Patents
Injection molded PVA Sponge
Alkylamino mercaptoalkylamides and their use as a reducing agent in a process for the permanent deformation of hair
Heat exchange apparatus
Absorbent articles having removable components
Method and apparatus for determining linear and angular velocity of a moving body
Impact absorption steering apparatus
Aerosol container with position-sensitive shut-off valve
Recovery of fumed SiO.sub.2
Mesh-covered core strip for high frequency RFI/EMI radiation shielding
Bridge for connecting cable channel systems