Joined just to resurrect old threads with silly comments?what is this ?
You’re a day late it’s already Saturday.
What is this?
- Thread starter SHOZ
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You’re a day late it’s already Saturday.
really I don't know what is it, This is the first time I've seen it
- Joined
- Apr 22, 2016
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- 1,237
Its what ET used to phone home, duh!
Pretty sure it's a potentiometer used for precise voltage measurements in a lab. Probably from the early 1900's.
Search Leeds and Northrup type k
www.worthpoint.com
Search Leeds and Northrup type k
Leeds & Northrup potentiometer Type-K for university electrical measurements lab | #1822741293
Vintage Leeds and Northrup Potentiometer, c. 1942. Highly precise laboratory voltage measurement from 0 to about 1.5 volts. These can also be used with a shunt to also make precise current measurement
www.worthpoint.com
Yeah, Wheatstone is for resistance and this is for voltage and can also be configured to measure current. They operate on somewhat similar methods.
In order to read resistance you apply a known voltage and measure the drop caused by circuit impedance. A Wheatstone bridge is a high accuracy voltmeter. In reading the description they are using this device to accurately determine the health of most likely, motor windings, shorted windings in mostly polyphase applications. The explanations on the sale site leaves something to be desired. Still an interesting piece of early technology. I was looking for any sign of Frankenstein's monster lurking about.
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