Compass

[WatfordParticipant @watford]

Found this strange compass in an autojumble a while back, for a quid.

Strange in that it is scaled 0-90-0-90 rather than 0-90-180-270.

Suspect that it came from some piece of surveying equipment but do not know what. I would love to know. Any suggestions.

Thanks in anticipation.

Mike

[WatfordParticipant @watford]

identification of strange compass

[Swarf, Mostly!Participant @swarfmostly]

Hi there, Mike,

Your device is the indicator from a tangent galvanometer.

I remember using one during physics lessons at school but that was a long, long time ago!

I suggest you Google 'tangent galvanometer'.

Best regards,

Swarf, Mostly!

[WatfordParticipant @watford]

Thanks Swarf. You are a star.

I was off down completely the wrong path, it is good to know what it is at last. I saw it on a stall at an autojumble and it looked a 'very nice' thing; particularly for a single pound! I cleaned it up – it was pretty grotty – and have wondered ever since.

Mike

[Russell EberhardtParticipant @russelleberhardt48058]

You just need to find the coil now

Russell

[Author]

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