Author Topic: Can anyone age this Crompton Parkinson Ammeter?  (Read 935 times)

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Offline Chet T16Topic starter

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Can anyone age this Crompton Parkinson Ammeter?
« on: February 18, 2023, 07:06:04 pm »
Evening all,

Has anyone any idea how old the attached would be?
Chet
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Offline Wallace Gasiewicz

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Re: Can anyone age this Crompton Parkinson Ammeter?
« Reply #1 on: February 19, 2023, 06:41:44 pm »
Well, if it's made in England, it must be an antique for sure

Same goes for made in the USA

Interesting. Cannot seem to find anything very meaningful

Country-of-origin marking laws were first enacted in the 1880s in various European countries* to distinguish imported goods (particularly German goods) from domestic goods, and became mandatory in the United States in 1891 with the enactment of the Tariff Act of 1890 (p. 1-3).

Crompton Parkinson was a British electrical manufacturing company. It was formed in 1927 by the merger of Crompton & Co. with F & A. Parkinson Ltd. The brand is now part of Brook Crompton.
« Last Edit: February 19, 2023, 06:44:24 pm by Wallace Gasiewicz »
 

Offline Gyro

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Re: Can anyone age this Crompton Parkinson Ammeter?
« Reply #2 on: February 19, 2023, 07:37:50 pm »
It looks like an educational meter to me, the sort of thing you might find in a school lab. My guess would be 1930s-40s.

I can see a red wire at the back of the movement, the insulation composition would probably be a clue.


EDIT: Looking at the case construction, it's possible that it might have been cut down from a larger meter by an enterprising Physics master. A lot of school lab equipment was created by the schoolmasters in those days. No, from the later photos, that looks as if it was made for the purpose.
« Last Edit: February 19, 2023, 07:48:42 pm by Gyro »
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Offline Chet T16Topic starter

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Re: Can anyone age this Crompton Parkinson Ammeter?
« Reply #3 on: February 19, 2023, 07:43:03 pm »
I popped the top off to have a look inside but haven't went any deeper into it.

Any clues in the pics?
Chet
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Online Psi

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Re: Can anyone age this Crompton Parkinson Ammeter?
« Reply #4 on: February 19, 2023, 08:55:12 pm »
To me those wires don't look original.

Yeah, I also think it's educational.
It may have been hand assembled in very low volume for a handful of schools.
Perhaps even by a professor with some woodworking skills.
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Offline factory

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Re: Can anyone age this Crompton Parkinson Ammeter?
« Reply #5 on: February 19, 2023, 09:31:23 pm »
The wires look fine to me, probably newer than you think, they were used in many schools.

Voltmeter version from Crompton, in the Science museum collection.
https://collection.sciencemuseumgroup.org.uk/objects/co145542/moving-coil-voltmeter-in-angled-wooden-stand-voltmeter
Note the label from W. and J. George and Becker Ltd, which became Griffin & George Ltd in 1954.

And another rebranded by Griffin & George (supplier of science equipment to schools & labs).
https://www.ebay.co.uk/itm/185732797675
The ebay one must be made after 1954 when Griffin & George Ltd were formed by a merger; https://www.gracesguide.co.uk/Griffin_and_George

David
 


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