Galvanometer from prototype Cox selenium-cell magnifier equipment, possibly made by Kenwrick Cecil Cox, 1910-1920.
This is part of a magnifier was invented by Kenwrick Cecil Cox, a British engineer who worked in a cable station in the Pacific ocean, on the Pacific Telegraph Cable. The purpose of the magnifier was to cut out the expensive and arduous task of re-sending messages that passed through the cable station on their way to other destinations. This was required because the signals lost clarity over distances of hundreds of miles, meaning that the only way for the messages to reach their destination was for operators to resend the messages manually when they passed from one length of cable to another. The magnifier boosted the signal strength and clarity. The regenerated signal was then suitable for perforating a new tape, or could be transmitted directly. These components are parts of the development prototypes made by Cox, largely in his spare time while working at various cable stations. The production version was in widespread use for over a decade.
- Object Number:
- 1976-269 Pt2
- furnishing and equipment
- measuring device - instrument
- Donated by P. K. Cox
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.