Accession No

4358

Brief Description

thermocouple potentiometer, by Cambridge Scientific Instrument Company Ltd., English, c. 1918

Origin

England; Cambridge

Maker

Cambridge Scientific Instrument Company Ltd.

Class

electrical

Earliest Date

1918

Latest Date

1918

Inscription Date

Material

wood; metal (brass, at least 3 white metals); glass; paper; plastic (ebonite, at least one other); rope (cord)

Dimensions

length 340mm; breadth 200; height 300mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

“T.R. 100 (?) No. 497 (?)” (on edge of wooden case, added)

Description Notes

Rectangular wooden box; lid and carrying strap missing. Ebonite top on instrument section which adjoins compartment which would once have contained two batteries.
Two pairs of terminals, one marked ‘Std Cell’, the other marked ‘X’; brass knob for adjusting rheostat; switch for setting the range of the slide wire (part missing) and a brass drum marked ‘To Clamp Press & Turn’. Glazed window allow viewing of paper-covered drum which shows the reading in millivolts. The space below the top plate also carries a Weston standard cell and an accumulator. Further pair of brass terminals on side of box.

References

Events