Shelfmark

Hil. 481

Maker

Hilger & Watts Ltd.

Subjects

Seismometers--Design and construction; Engineering instruments

Title

Willmore adjustable-period seismometer

Description

After a brief physical description of the two models of instrument available, information on the first page is arranged in 7 short, untitled, starred paragraphs, covering these topics:-
Adjusting the Period of Oscillation of the Magnet;
Structure of the Leaf Springs;
The Power/Weight Ratio of the Magnet and Coil Assembly;
Coils;
Controls;
Desiccator;
Setting Up Vertically, and Horizontally.
On the second page information is given under these headings: Period Adjustment;
Specification (Abridged);
Catalogue Numbers for Ordering SG450-453, SG 460

Earliest Date

1962

Latest Date

1964

Pages

2

Address

98 St. Pancras Way, Camden Road, London N.W. 1

Other Makers

Cat no

CS 150/3

Contents List

Hardback

Prices

Index

Illustrations

Yes

General Ref