Shelfmark

csi.859

Maker

Cambridge Instrument Co. Ltd.

Subjects

Galvanometer--Design and construction; Electric measurements; Potentiometer; Bridge circuits; Reflection--Optics; Rulers (Instruments); Lamps

Title

Cambridge short period galvanometer; and Cambridge lamp and scale outfit

Description

This instrument was designed primarily as a null indicator for precision bridges and Vernier potentiometers, but also for use as a deflectional instrument in applications where rapid changes need to be observed accurately.
Under the heading General Description, a fairly detailed account of the instrument’s design, and use is given, and under the heading Short Period Galvanometer Specifications, its cat. no., Coil resistance, Sensitivity in mm./A at 1 metre, Period (undamped) in seconds, External resistance for critical damping, Net weight, Overall height, Diam. of base, Diam. of tower, are all provided.
A brief account follows of the Lamp and Scale Outfit, an accessory for use with the galvanometer. It comprises a lamp attached to a stand at the top of which is mounted a scale.
Iinformation is given in paragraph form, covering these topics:
The lantern: how to fit it, how it works;
The scale: its mounting, and operation;
Transformers;
The stand, and alternative fittings;
Specifications:
Description and Cat. No., Overall length of scale, Diameter of
base, Max. height, and Net weight of each model:

Earliest Date

Latest Date

Pages

2

Address

13, Grosvenor Place, London, S.W.1; Works: London & Cambridge

Other Makers

Cat no

List 275/1

Contents List

Hardback

Prices

Index

Illustrations

Yes

General Ref