Accession No

3256

Brief Description

extensometer, 20th C.

Origin

Maker

Class

metrology

Earliest Date

1900

Latest Date

1970

Inscription Date

Material

metal (iron, brass, at least 3 white metals); plastic (ivorine); wood

Dimensions

box length 289mm; breadth 190mm; height 128mm

Special Collection

Provenance

Transferred from Department of Engineering, University of Cambridge, Cambridge, England, 08/1985.

Inscription

Description Notes

Black-painted iron frame with 2 white metal crossing bars, lower one held in place by knurled brass screws. Pair of brass handled white metal screws at each end which meet with their points touching. Screws labelled ‘A’, ‘B’, ‘C’ an ‘D’. Top of instrument has spring holding the 2 uprights together. Below the spring a white metal frame sits in the gap between the uprights. Within the frame 2 white metal strips carry a pair of ivorine indexes with central line marked. The distance apart of the bars can be adjusted by a course adjustment numbered 0, 5, 10, 15 and by a fine adjustment divided 0 - [100] numbered by 10 subdivided to 1, with vernier reading to 0.1. Wooden box with brass hinges and hook fasteners, with note in lid ‘1 scale Div = 1/60 000’.

Complete

References

Events