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Old 15th Sep 2023, 9:20 pm   #1
biorapter2321
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Default Ericsson chart recorder machine.

Can anyone identify this piece of equipment, its seems to be a kind of chart recorder maybe from a telephone exchange? It's very heavy. Thanks in advance
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Old 16th Sep 2023, 9:26 am   #2
G6Tanuki
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Default Re: ericsson chart recorder machine

Yes it is a chart recorder, not specifically for use in a telephone exchange, it could have found a use in a whole range of industries for recording things like furnace temperature, pressures in various parts of a chemical plant, voltages and currents in a transmitter, water levels in a pumping station or sewage works.... The list is endless.
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Old 16th Sep 2023, 4:21 pm   #3
g8jzyian
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Default Re: Ericsson chart recorder machine.

Hi
it is a chart recorder but are there 10 electromagnets at fig5?
when they are operated do they make a mark on the paper from the typewriter ribon that I spot on the side view?
If so I have used a similar device to assess traffic in a strowger exchange.( many years ago).
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Old 16th Sep 2023, 4:56 pm   #4
Graham G3ZVT
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Default Re: Ericsson chart recorder machine.

I think the ten actuators move each of the ten pens +&- laterally on the moving paper. Think of the Polygraph in any number of 1950s psycological thrillers.
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Old 17th Sep 2023, 1:23 pm   #5
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Default Re: Ericsson chart recorder machine.

I have seen panel mounted chart recorders used in old industrial machinery (gas turbines) to record vibration levels, pressures, temperatures etc... If its industrial, and of the right age, the inputs may be 4 to 20 mA current loop which became an industrial analogue signal standard in the 1950s.
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Old 17th Sep 2023, 2:48 pm   #6
biorapter2321
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Default

thanks for the replies, ill have to make an educated guess about the electromagnets when i see it, it uses a strange kind of plug so i cant really test it

here are some close ups of the chart paper and the plug, also the top clear cover can slide away so the operator can make write notes on the paper
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Old 21st Sep 2023, 10:56 am   #7
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Default Re: Ericsson chart recorder machine.

Could your connectors be part of the "Multicon" or 159 series?

https://www.casa.co.nz/connectors/mu..._3p_Secure.pdf

Some dimensions are given in the PDF - may help you to identify them.

Found under the manufacturer names of: Jones, Painton and Plessey.

https://www.gracesguide.co.uk/Painton

In 1969 Painton was acquired by Plessey Components. Not sure where Jones fits into the picture.

Cheers, Scott
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