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US3599178A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of storing information on and retrieving information from a magnetic drum

Assignee: Link Flight Simulation Corp
•
Filing: 1969-03-21
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Granted: 1971-08-10
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Expires: 1989-03-21
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Abstract

Abstract The disclosed embodiment of the present invention is a method of storing pictorial information on and retrieving pictorial information from a movable storage media to permit rapid access and retrieval of such information for displaying either the whole or a submultiple of the whole of the pictorial information in a minimum of time. The disclosed method comprises writing blocks of such information on a magnetic drum, with each block being formed of one or more lines of the scanned information. The blocks are arranged in step fashion on the drum with each successive block being spaced along the direction of travel of the drum a distance equal to the line length of the smallest picture to be displayed. In the disclosed embodiment, each block is formed of four scan lines written in 16-bit parallel format on the drum, and the spacing of each block is equal to the distance occupied by onefourth of a scan line of information. Since the scanned information is greater than the displayed information, that portion of the information which is to be displayed is read from the drum, compressed by means of logic circuits, and supplied to a display storage. The information in the display storage is continuously read and supplied to a CRT for display to an operator.

Inventors

  • 👤 David G Jackson
  • 👤 Bernie F Jackson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 04:00
CPC Classifications
G; G06; G06K; G06K17/00; G06K17/0016; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/391

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 140 words
A method of mapping information on a movable storage media, wherein said information defines n lines of m elements per line of a scanned image for construction of at least one display therefrom which comprises n/x lines of m/y elements per line, wherein x is equal to or greater than unity and equal to or less than n and y is equal to or greater than unity and equal to or less than m, comprising the sTeps of recording at least one line of said information along at least one track of the storage media, and recording a subsequent line of said information along another track of the storage media and spaced along the path of travel of the storage media from the beginning of the recording of said one line by a distance occupied by m/y elements of information.
Claim 2
Independent Claim 140 words
A method of mapping information on a movable storage media, wherein said information defines n lines of m elements per line of a scanned image for construction of at least one display therefrom which comprises n/x lines of m/y elements per line, wherein x is equal to or greater than unity and equal to or less than n and y is equal to or greater than unity and equal to or less than m, comprising the sTeps of recording at least one line of said information along at least one track of the storage media, and recording a subsequent line of said information along another track of the storage media and spaced along the path of travel of the storage media from the beginning of the recording of said one line by a distance occupied by m/y elements of information.
Claim 3
Dependent Claim 14 words
A method as defined in claim 1, wherein x and y are integral numbers.
Claim 4
Dependent Claim 13 words
A method as defined in claim 2, wherein x is equal to y.
Claim 5
Independent Claim 136 words
A method of mapping information on and retrieving information from a movable storage media, wherein said information comprises n lines of m elements per line of a scanned image, for construction of at least one display therefrom which comprises n/x lines of m/y elements per line, comprising the steps of recording at least one line of said information along at least one track of the storage media, recording a subsequent line of said information along another track of the storage media and spaced along the path of travel of the storage media from the beginning of the recording of said one line by a distance occupied by m/y elements of information, sensing a plurality of elements from said one line, and compressing the data represented by said plurality of elements to form a display information bit.
Claim 6
Independent Claim 136 words
A method of mapping information on and retrieving information from a movable storage media, wherein said information comprises n lines of m elements per line of a scanned image, for construction of at least one display therefrom which comprises n/x lines of m/y elements per line, comprising the steps of recording at least one line of said information along at least one track of the storage media, recording a subsequent line of said information along another track of the storage media and spaced along the path of travel of the storage media from the beginning of the recording of said one line by a distance occupied by m/y elements of information, sensing a plurality of elements from said one line, and compressing the data represented by said plurality of elements to form a display information bit.
Claim 7
Dependent Claim 21 words
A method as defined in claim 4, wherein the data is compressed by a factor which is inversely proportional to x.

References Cited (Backward Citations)

US3427596A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-08-09 1975-02-08 1975-08-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-08-09 1979-02-08 1979-08-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-08-09 1983-02-08 1983-08-10 $7700.00 Window Closed / Lapsed

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