EP0255259A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Computer-aided design system for displaying block diagrams
Assignee: British Telecommunications PLC
•
Filing: 1987-07-15
•
Granted: —
•
Expires: 2007-07-15
Abstract
Abstract A computer aided design system pocesses input instructions to produce block diagrams. Each block has sub-blocks and text may be placed into each sub-block. The system then automatically draws the blocks to an optimum size. Boundaries defining the edge of a plurality of blocks are moved to accommodate the bounded sub-block requiring the most space.
Inventors
- 👤 Raymond Michael Hollett
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
G; G06; G06T; G06T11/00; G06T11/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
1 A computer aided design (CAD) system comprising a data input device (15), a processing unit (16), a memory device (17) and an output device (18, 19) for displaying text and graphics, the memory device being arranged to receive input instructions from the data input device via the processing unit, wherein the processing unit processes said input instructions and supplies output instructions to the output device, and the output device displays a block in response to the output instructions: characterised in that the block is divided into a plurality of sub-blocks in response to output instructions processed from input instructions, the size of the first sub-block is determined by the size of said text, and the size of another sub-block is adjusted to maintain the overall shape of the block.
Claim 2
Dependent Claim
130 words
1 A computer aided design (CAD) system comprising a data input device (15), a processing unit (16), a memory device (17) and an output device (18, 19) for displaying text and graphics, the memory device being arranged to receive input instructions from the data input device via the processing unit, wherein the processing unit processes said input instructions and supplies output instructions to the output device, and the output device displays a block in response to the output instructions: characterised in that the block is divided into a plurality of sub-blocks in response to output instructions processed from input instructions, the size of the first sub-block is determined by the size of said text, and the size of another sub-block is adjusted to maintain the overall shape of the block.
Claim 3
Dependent Claim
46 words
2 A CAD system according to claim 1 in which the sub-blocks are defined by boundaries (A, B, C, D, E, F) wherein each boundary is substantially straight, lies at a predetermined angle and is arranged to be moved along an axis perpendicular to its length.
Claim 4
Dependent Claim
40 words
3 A CAD system according to Claim 2 in which the position of each boundary is calculated from the input instructions, to produce boundary parameters for each sub-block, and boundary relationships which define a relationship between parameters of different sub-blocks.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.