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What Is This Thing? Science Related...  
User currently offlineFalstaff From United States of America, joined Jun 2006, 6419 posts, RR: 29
Posted (6 years 10 months 3 weeks 5 hours ago) and read 4121 times:
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What is this thing? The school where I teach is being remodeled (first time since 1957) and all kinds of odd things are being thrown out. The head of the science department brought me this thing because he knows I like odd things. He couldn't tell me what it was and none of our other science teachers could either. You are looking at the front side, the back side looks exactly the same except that the pointer is black, instead of red. The two things sticking up on the base are screw connectors for something, I assume wiring. This device was made by W.W. Welch of Chicago, Illinois.

If you are wondering, the thing next to it is a Union Switch & Signal Vane Line Relay for 1910's railroad signals.


My mug slaketh over on Falstaff N503
4 replies: All unread, jump to last
User currently offlineHomer71 From United States of America, joined Jul 2001, 2268 posts, RR: 13
Reply 1, posted (6 years 10 months 3 weeks 4 hours ago) and read 4101 times:

Maybe an old ohmmeter?

(edit) or an old voltmeter?

[Edited 2009-06-16 12:38:12]

"On spaceship earth there are no passengers...only crew."
User currently offlineAF340 From Canada, joined Jul 2007, 2786 posts, RR: 4
Reply 2, posted (6 years 10 months 3 weeks 4 hours ago) and read 4098 times:

My bet is it's a Galvanometer:



User currently offlineJBirdAV8r From United States of America, joined Jun 2001, 4503 posts, RR: 19
Reply 3, posted (6 years 10 months 3 weeks 4 hours ago) and read 4071 times:

Quoting AF340 (Reply 2):
My bet is it's a Galvanometer:



That was my first thought, and I'll second that opinion.  checkmark 

W.W. Welch...wonder if that's part of the modern day Sargent-Welch?

I got my head checked--by a jumbo jet
User currently offlineAverageUser From , joined Dec 1969, posts, RR:
Reply 4, posted (6 years 10 months 2 weeks 6 days 9 hours ago) and read 3949 times:

This would seem to be a slighty more modern version:

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