Proportional Dividers
Collection
Code
DU_278
Catalogue link
The adjustable pivot point allows the draughtsman to enlarge or reduce measurements by a fixed ratio.
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Sine bar -
[Unidentified object from The David Usborne Collection] -
Sine bar -
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Kitchen fork -
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Egg cup -
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[Unidentified object from The David Usborne Collection] -
Anemometer