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
Phone messaging using audio streams
Food-grade flour from dry fractionated corn germ and collet composition and method for producing same
Advocate for facilitating verification for the online presence of an entity
Determining ill conditioning in square linear system of equations
Spectrometer
Virtual physician acute myocardial infarction detection system and method
Switched capacitor amplifier
  Randomly Featured Patents
Soft propylene polymer blend with high melt strength
Systems and method for locating failure events in samples under load
Geranium plant named `SIL RUBEN`
Hardware mechanism for optimizing instruction and data prefetching by forming augmented prefetch instructions
Training aid for chipping and putting
Multimodal chromatographic separation media and process for using same
Tripod-supporting device and supporting member for supporting a tripod
Ink jet ink and ink jet recording method
Console for a nuclear control complex
Controlled power cycling in computing devices