Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Disk memory device










Image Number 2 for United States Patent #5111345.

A disk memory device is provided that will maximize the storage capacity of a memory disk while at the same time maximize the record and playback data rate. Two recording disks are mounted upon a common shaft that is rotated at a fixed speed. Each disk has a recording area including a surface upon which data can be recorded/read in the form of tracks arranged either in concentric tracks or in a spiral. The recording area surfaces are divided into multiple concentric track groups. Two read/write heads and two head positioning servos (including electronic controls) are mounted such that each disk recording surface can be read out or written by the read/write heads. Each track of the multiple track groups of the first disk are given designated numbers beginning with the outer track of the outermost or edge track group and continuing in higher consecutive numbers until the inner track of the innermost track group is designated. However, each track of the multiple track groups of the second disk are given designated numbers in the exact reverse order of the first disk, such that the combined length of a track from the first disk, when added to the length of the same numbered track of the second disk is a constant, generating a constant data rate for the disk memory device.








 
 
  Recently Added Patents
Efficient high-harmonic-generation-based EUV source driven by short wavelength light
Communication relay device for train and communication relay method for train
Toner composition with charge control agent-treated spacer particles
Methods for storing data streams in a distributed environment
Swapping bandwidth reservations
Energy-efficient polling loop
Testing operations of software
  Randomly Featured Patents
Floor scraper attachment for a shoe
Use of antagonists of the CBI receptor for the manufacture of a composition useful for the treatment of hepatic diseases
Memory device with faster write operation
Operation mechanism of switch
Rotational molding of hollow articles of uniform wall thickness
Adapting a directional microphone signal to long-lasting influences
Method for passenger classification using a seat mat in the vehicle seat
Apparatus for controlling an ignition coil of an internal combustion engine
Vertical locking system for shipping containers
Battery module and method of manufacturing the same