Plotting device
A parallel rule comprising two rulers 1, 2 linked by at least two equal-length cross-arms 4, the cross-arms 4 being of asymmetrical shape such that the cross-arms 4 interfere to the minimum extent with the holes or knobs 3 which are used to move the rulers 1, 2. The device is of particular utility a...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A parallel rule comprising two rulers 1, 2 linked by at least two equal-length cross-arms 4, the cross-arms 4 being of asymmetrical shape such that the cross-arms 4 interfere to the minimum extent with the holes or knobs 3 which are used to move the rulers 1, 2. The device is of particular utility as a compact parallel rule or plotter suitable for small plotting tables. |
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