Accession No

2715

Brief Description

plotting protractor, by Cary, English, 1800 (c)

Origin

England; London

Maker

Cary

Class

drawing

Earliest Date

1800

Latest Date

1800

Inscription Date

Material

metal (brass, silver, steel); wood

Dimensions

central aperture 30 mm;d of circle 327 mm; radius to end of plotting arms 480 mm; box length 1032mm; breadth 400mm; thickness 45mm

Special Collection

Provenance

Purchased, 15/6/1967

Inscription

‘CARY LONDON’

Description Notes

Spoked circle; graduated silvered scale, (0)-360 by 10 to 30’. ‘A’ type vernier to 30” on plotting arms. Move round cogged outer edge of circle by pinnion with knurled head on limb perpendicular to plotting arms. Central circular aperture in coppery brass. 4 steel pins below circle. 4 index marks at 90˚ to each other on inner edge of circle. Fitted and shaped wooden box.
good condition

References

Events