Beam compass

Beam compass, tubular, divided on silver to 1/20th inch; reads by vernier to 1/1000th inch; clamp and slow motion; numbered to 45 on brass; extension tube numbered from 46 to 65, divided as above

Details

Category:
Mathematics
Object Number:
1876-606
type:
compasses (drawing instruments) and beam compasses
credit:
British Admiralty (Hydrographic Department)

Parts

British Admiralty Hydrographer's tubular beam drawing compass

British Admiralty Hydrographer's tubular beam drawing compass

Beam compass, tubular, divided on silver to 1/20th inch; reads by vernier to 1/1000th inch; clamp and slow motion; numbered to 45 on brass.

Materials:
brass (copper, zinc alloy)
Object Number:
1876-606 Pt1
type:
beam compasses
Image ©
The Board of Trustees of the Science Museum
Extension tube for Beam compass

Extension tube for Beam compass

Extension tube for Beam compass

Object Number:
1876-606 Pt2
type:
tube
Image ©
The Board of Trustees of the Science Museum