Accession No

2387

Brief Description

two nearly identical beam compasses by Troughton & Simms, c.1850

Origin

London; England

Maker

Troughton & Simms

Class

drawing

Earliest Date

1850

Latest Date

1850

Inscription Date

Material

metal (brass, iron); wood (mahogany?, boxwood)

Dimensions

l 1551mm; box length 1585mm; breadth 98mm; height 62mm

Special Collection

Provenance

Purchased from D.H. Morgan, Norfolk, England, 09/1978.

Inscription

1. ‘Troughton and Simms London’ (zero index)
2. ‘Troughton and Simms LONDON’ (sliding index)

Description Notes

1. Wooden (mahogany?) beam, pentagonal section. Inlaid boxwood scale graduated on both sides [3] - [177] by 5 to 1. Zero index with knurled screw fine adjustment and clamp and vernier reading to 0.1. Pencil holder with knurled screw clamp. Sliding beam head with knurled screw clamp and engraved scale reading to 0.1. Pencil holder with knurled screw clamp.
2. Identical but graduated 0 - [173] by 5 to 1 on one side only. Zero index with vernier reading to 0.1 with fine adjustment and clamp, (iron very badly rusted). Sliding beam head with engraved scale reading to 0.1 fine adjustment (clamp screw missing). Pointed indicator with knurled screw clamp
Both in wooden box.
good condition

References

Events