Accession No

4361

Brief Description

Strip-recording galvanometer or thread recorder, single channel, one colour, by Cambridge Scientific Instrument Company Ltd., English, 1912

Origin

England; Cambridge

Maker

Cambridge Scientific Instrument Company Ltd.

Class

electrical

Earliest Date

1912

Latest Date

1912

Inscription Date

Material

wood; metal (brass, cast iron, white metal); glass; plastic (ivorine)

Dimensions

width 346mm; height 382mm; depth 284mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘RESISTANCE 2200ω
SENSITIVITY FACTOR
180ω/mv
No 16734’ (ivorine plate on front door)
‘The Cambridge Scienitific Instrument CO. LTD. Cambridge. ENGLAND NO. 16734’ (front of instrument)
‘PATENTED
United Kingdom 10844. 1905.
France 356750. Aug. 8th 1905.
Germany 184002. 1905.
U.S.A. 827086.
July 31st 1906’ (clockwork drive)

Description Notes

Rectangular wooden box with hinged locking glazed door and glazed window in top. On fixed foot and two levelling feet. Cast iron instrument frame removable from box; suspended coil D’Arsoval galvanometer at rear with long pointer extending to drum recorder at front; clamp and zero adjustments at top; upper of two clockworks depresses pointer on inked thread at regular intervals; the continuous inked thread is also moved along a system of pulleys periodically; lower clockwork rotates chart drum; paper missing. Linear scale above pointer marked ‘Fery Telescope No. 15055. Degrees Centigrade’, divided [1100] - 300, numbered by 100, graduated to 50. Two terminals on base of frame for input potential. Space for exchangeable resistance coil (missing).

Condition fair (thread off pulleys); incomplete (paper and resistor missing).

References

Events