Thompson mirror galvanometer use

Autor/Urheber:

Norman Hugh Schneider and Silvanus P. Thompson

Shortlink:

https://dewiki.de/b/541f1

Quelle:

Wikimedia Commons

Größe:

1215 x 614 Pixel (66692 Bytes)

Beschreibung:

Drawing of a Thomson reflecting galvanometer from around 1880, showing use. The vertical tube contains a fine silk fiber, which suspends a 1/2 in. mirror with small magnets on its back, seen in window, in the center of a coil of wire. A light beam reflected from the mirror lands on a scale and serves as a pointer. Tom Perera's Scientific instrument collection says this was a Model 502, made by Elliot Bros., London. It has interchangeable coils of from 150 to 5000 ohms resistance. The left drawing is from Schneider, the right from Thompson. Alterations: removed captions, rotated Schneider image so it was vertical, scaled Thompson image by 0.60, combined images.

Kommentar zur Lizenz:

Public domain - authors died more than 70 years ago

Lizenz:

Public domain

Credit:

Downloaded from Norman H. Schneider (1913) Electrical Instruments and Testing, Spon & Chamberlain, New York, p.13 fig.8 and Thompson, Silvanus P. (1881) Elementary Lessons in Electricity and Magnetism, Macmillan, London, p.169, fig.91 on Google Books

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