Combined drawing ruler and symbol stencil - is broader than normal measuring ruler and has symbol apertures in central position

Combined drawing ruler and symbol stencil - is broader than normal measuring ruler and has symbol apertures in central position

The ruler has measuring scales on both longitudinal sides. The ruler is wider than most conventional rulers, and is pierced with a number of apertures (6), which correspond to symbols used e.g. in the construction industry. The ruler also has a number of elements (2) for use with a drawing machine....

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: GAISER,DIETER
Format: Patent
Sprache:eng ; ger
Schlagworte:
ACCESSORIES FOR WRITING OR DRAWING
ARTICLES FOR WRITING OR DRAWING UPON
BUREAU ACCESSORIES
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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Beschreibung
Zusammenfassung:The ruler has measuring scales on both longitudinal sides. The ruler is wider than most conventional rulers, and is pierced with a number of apertures (6), which correspond to symbols used e.g. in the construction industry. The ruler also has a number of elements (2) for use with a drawing machine. It may be formed with scales (3,4), and apertures. It is esp. designed for use in schools, and may be made of plastics material.