Accession No

4372

Brief Description

circular chart recorder or disk recorder, recording pyrometer, by Foster Instrument Company, English, 1920-1930 (c)

Origin

England; Hertfordshire; Letchworth

Maker

Foster Instrument Company

Class

electrical

Earliest Date

1920

Latest Date

1930

Inscription Date

Material

wood; glass; metal; paper (card)

Dimensions

height 520mm; breadth 345mm; depth 123mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘FOSTER
RECORDING
PYROMETER
MADE IN ENGLAND
TYPE No. 4046 SERIAL No. 12094...
FOSTER INSTRUMENT CO.,
LETCHWORTH, ENGLAND.’ (on card seen through window in door)

Description Notes

Flat, rectangular wooden box for bench use; hinged and locking door; two adjustable feet, one fixed; circular liquid level; two terminals on front edge of box; pivoted galvanometer movement in small wooden case (sealed); long galvanometer pointer extends to circular recorder turntable; two clockworks rotate table, and operate bar which alternately depresses pointer over ink pad and then over paper to produce dot record; two winding shafts, and on-off lever for clockworks. With door key, instruction sheets, and Certificate of Test, dated 23-7-1929.

Condition: good (galvanometer pivot intact, clockworks operational); complete.

References

Events