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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Bibliographische Detailangaben
1. Verfasser: DAVID JOHN YOUNG
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
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.