Resources Contact Us Home
Racket stringing apparatus and method

Image Number 4 for United States Patent #4326713.

A racket stringing machine having a racket head holding fixture and a carriage mounted for reciprocation toward and away from the fixture and a string clamp mounted on the carriage for engaging a string drawn through a racket head mounted on the fixture for tensioning the string upon movement of the carriage away from the fixture; a first brake which is automatically set upon drawing of the string to an elevated tension greater than the desired final predetermined tension to effect a pre-stretching of the string to a length beyond its length at such predetermined tension while permitting a decrease in the string tension; and a second brake which is automatically set to lock the string at the desired final predetermined tension. The apparatus also includes means for providing a controlled restrained rate of increase in string tension and a controlled restrained rate of decreasing string tension at tensions between the predetermined tension and maximum tension. Means is also provided for adjusting the amount of pre-stretching of the string.

  Recently Added Patents
Collaborative data redundancy for configuration tracking systems
Lubricating oil compositions
Normalized contextual performance metric for the assessment of fatigue-related incidents
Color stable manganese-doped phosphors
Methods and systems for detecting icing conditions
Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
  Randomly Featured Patents
Optical write-in head, image forming apparatus using the same, and method for inspecting the apparatus
System for transferring liquid load, mainly oil to a tanker
Process for preparing aminomethyl diaryl compound resins
Executive chair
Semiconductor device using magnetic domain wall movement
Side type backlight module
Multilayer static gasket with bead compression limiter
Shallow trench isolation method utilizing combination of spacer and fill
Semiconductor devices and methods of fabricating the same