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
Imaging apparatus, control method thereof, and program
Enterprise seamless mobility
Lighting fixture
Scanning transmission electron microscope and axial adjustment method thereof
Selected alert delivery in a distributed processing system
Aqueous flowable concentrate compositions of a microencapsulated dinitroaniline herbicide
Radio communication system, base station apparatus, terminal apparatus, and radio communication method for radio communication system
  Randomly Featured Patents
Vehicle control apparatus
Electronic circuit for a high-frequency switch
Dun wing fly
Gas field ion source, charged particle microscope, and apparatus
Internally reflective ellipsoidal collector with projection lens
Antenna polar mount assembly
Flow control device for tub, spa, or shower
Portable sail kit
Portable drill rig for boring underground inverted arcuate paths
Diaphragm pressure switch