Accession No
1375
Brief Description
parallel rule, c.1700
Origin
Maker
Class
drawing
Earliest Date
1700
Latest Date
1700
Inscription Date
Material
metal (brass)
Dimensions
Special Collection
Provenance
On loan from Trinity College, University of Cambridge from 1951.
Inscription
Description Notes
Bevelled edges on furthest edges and on opposite sides. Brass hinges pierced. Two decorative studs on ends without hinges. Central rivet heads (studs missing?)
good condition
References
Events
Description
Parallel rule
Used by architects, engineers, cartographers and on nautical charts, the parallel rule is used for drawing parallel lines accurately. It is also used in conjunction with a scale rule for producing orthogonal drawings (with lines in non-parallel direction as well). The pivoting links can be extended to the required distance, but this makes the instrument liable to error for larger drawings because the extension is changed by hand, and can be varied accidentally.
18/10/2002
Created by: Saffron Clackson on 18/10/2002
FM:39861
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