My hobby
I'm an enthusiastic collector of scientific instruments that are required for voltage or current
measurement. Well, sometimes other things slip into the collection, just because I adore them.
Below you'll find a listing of some pieces I've collected during the last few years.
It is only the beginning of a collection but nevertheless I'm proud of it and it is great fun to deal with them.
It is sometimes quite difficult to get any information about these instruments (e.g. the date of manufacture),
especially if the data printed on them is only fragmentary. In these cases I tried to date them
by considering the materials used and the workmanship. Since I'm not an expert I probably
may not be right in every case. Therefore I'm very grateful for any help and hints to mistakes.
Please do not hesitate to contact me!
On the other hand it is sometimes very easy to give a precise description because any required
data can be found on the instrument or it is manufactured by a company (e.g. Hartmann and
Braun ), that has a special Museum Department where they keep records for all the instruments
they have ever built.
MEASUREMENT INSTRUMENTS |
|||
---|---|---|---|
INSTRUMENT | MANUFACTURER | DATE OF MANUFACTURE | IMAGE |
Wheatstone Bridge |
Crompton & Co Ltd, England |
ca. 1880 |
see me |
Wheatstone Bridge |
Hartmann & Braun, Germany |
1928 |
see me |
Resitor Decade |
Hartmann & Braun, Germany |
ca 1920 ? |
see me |
mV- & mA-Meter |
unknown |
ca. 1930 |
see me |
Voltmeter +/- 12V |
Siemens & Halske, Germany |
1914 |
see me |
Earthwire Tester |
unknown Germany |
ca 1930 ? |
see me |
LUX - Meter |
unknown |
unknown |
see me |
Insulation Indicator |
Siemens & Halske, Germany |
ca. 1930 |
see me |
Precision Voltmeter |
Siemens & Halske, Germany |
unknown |
see me |
Insulation Indicator |
Siemens & Halske, Germany |
unknown |
see me |
A/VA - Meter |
GBD |
ca. 1944 |
see me |
Lichtmarken Galvanometer |
Siemens & Halske, Germany |
unknown |
see me |
MEDICAL INSTRUMENTS |
|||
---|---|---|---|
INSTRUMENT | MANUFACTURER | DATE OF MANUFACTURE | IMAGE |
Low Current Impulse Generator |
unknown |
ca. 1880 |
see me |
BOOKS |
|||
---|---|---|---|
TITLE | PUBLISHED BY | PUBLICATION DATE | IMAGE |
The Practical Electrician's |
Electricity |
1929 |
see me |
Cyclopedia of Applied Electricity (8 volumes) |
American Technical Society |
1923 |
none |