US4023025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for processing data relating to information represented by lines on a chart
Assignee: Ferranti International PLC
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Filing: 1975-11-05
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Granted: 1977-05-10
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Expires: 1995-11-05
Abstract
Abstract Data processing apparatus for processing data relating to information represented by lines on a chart includes two stores, a computer, and a logic unit. One of the stores contains the cartesian coordinates of a plurality of spaced points along the lines while the other store contains the individual elements forming the lines between the spaced points. The computer operates to select sets of elements which may approach within a predetermined area around a point of interest on the chart, while the logic unit checks whether any element actually does fall within this predetermined area.
Inventors
- 👤 Barry Rowe
- 👤 Harold Frank Rymer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:15
CPC Classifications
G; G06; G06T; G06T17/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
Apparatus for processing data relating to information represented by lines on a chart, which includes first storage means for storing data representing the coordinates of a plurality of spaced points along the or each required chart line, second storage means for storing data representing a number of sets of elements each set being defined by one of said spaced points and determining the chart line between said one point and the next, computer means operably connected to the first storage means for identifying the or each spaced point relating to a particular chart line and within a predetermined area around a point of interest on the chart, and logic means connected to the computer means and to the second storage means and operable to determine which elements in each set defined by an identified spaced point approach within said predetermined area around said point of interest.
Claim 2
Dependent Claim
146 words
Apparatus for processing data relating to information represented by lines on a chart, which includes first storage means for storing data representing the coordinates of a plurality of spaced points along the or each required chart line, second storage means for storing data representing a number of sets of elements each set being defined by one of said spaced points and determining the chart line between said one point and the next, computer means operably connected to the first storage means for identifying the or each spaced point relating to a particular chart line and within a predetermined area around a point of interest on the chart, and logic means connected to the computer means and to the second storage means and operable to determine which elements in each set defined by an identified spaced point approach within said predetermined area around said point of interest.
Claim 3
Dependent Claim
66 words
Apparatus as claimed in claim 1 in which the predetermined area is a rectangle, the logic means including four counters each for storing a number representing one or other coordinate of the end of an element relative to one of two predetermined corners of the rectangle, and sign sensing means for indicating when the signs of the stored numbers represents a point within said predetermined area.
Claim 4
Dependent Claim
36 words
Apparatus as claimed in claim 2 including means whereby the number stored in each counter is increased or decreased by one, or remains unchanged, for each successive element of unit length in a set of elements.
Claim 5
Dependent Claim
67 words
Apparatus as claimed in claim 1 in which the predetermined area is the point of interest, the logic means including two counters each operable to store a number representing one or other coordinate of the end of an element relative to the point of interest, and detection means for indicating coincidence between the numbers in the counters and the respective coordinates of the said point of interest.
Claim 6
Dependent Claim
36 words
Apparatus as claimed in claim 4 including means whereby the number stored in each counter is increased or decreased by one, or remains unchanged, for each successive element of unit length in a set of elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |