Accession No

4113

Brief Description

table electrocardiograph, by Cambridge and Paul Instrument Company Ltd. and Cambridge Instrument Company Ltd., English, 1923-1927

Origin

England; Cambridge and London

Maker

Cambridge and Paul Instrument Company Ltd. Cambridge Instrument Company Ltd.

Class

medical

Earliest Date

1923

Latest Date

1927

Inscription Date

Material

wood; metal (brass, copper; cast iron, at least 3 others); plastic (bakelite, at least 4 others); rope (string); glass; hide (leather); ceramic

Dimensions

length 2030mm; breadth 550mm; height 1260mm

Special Collection

Cambridge Instrument Company Collection

Provenance

Donated by the Cambridge Instrument Company.

Inscription

‘THE
CAMBRIDGE AND PAUL
INSTRUMENT COMPANY LTD
LONDON & CAMBRIDGE’ (top)
‘Cambridge
Instrument Co. Ltd.
England.’ (control panel)

Description Notes

Table electrocardiograph by the Cambridge Instrument Company, 1923.

Large wooden table mounted on cast iron base with 4 feet. Falling plate camera is missing. Set half way down the table is a phonic wheel consisting of a wheel with five short radial spikes (some broken), linked to a second wheel, set between a vertical pair of electromagnets.
Einthoven galvanometer appears to be built inside a box towards one end of the instrument.
On the front panel of the trolley is a control panel with bakelite plate on the left. This has a glazed voltmeter set in brass; scale divided 0 - 1, numbered by 0.5; dial for selecting the electrodes; dial for setting voltage; unmarked dial; push-button marked ‘depress to insert 4000 ohms’; push-button marked ‘depress to connect cell’; further dial marked adjust rheostat. On the right of the panel is a set of switches in brass and ceramic; three switches are marked on ivorine plaques ‘camera motor’, ‘field’, ‘lantern’ and ‘time marker’; unmarked pair of switches below, with a bar joining the two.
Vibrating bar missing.
Lamp underneath trolley, also various electrical connections.

Condition fair; incomplete.

References

Events