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
Information obtaining and notification, data message forwarding and handover method and access node
Steering wheel
Systems and methods for flow mirroring with network-scoped connection-oriented sink
Bio-stimulant for improved plant growth and development
Method and apparatus for monitoring and/or controlling the curing of cements used in medical procedures
Multi-carrier operation for wireless systems
Ionic compound, anti-static pressure-sensitive adhesive and polarizer comprising the same
  Randomly Featured Patents
Laser beam printer for medical use
Multi-tasking real-time operating system for microprocessors with limited memory by saving only a single return address per task during context switching
Football helmet
Reclining motorized multi-position chair with rocking and pivoting action
Moving object identifying system
Solvent mixtures suited for use with wiping cloth on auto bodies
Method for quantitatively determining bone mineral mass by CT system
Objective lens drive apparatus