The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Topic Options
Rate This Topic
#151676 - 04/30/03 02:20 PM Edison Chemical Meter (1878 to late 1880s)
Webmaster Offline


Registered: 10/07/00
Posts: 3142
Loc: NY, USA
Edison developed the first meter that measured the amount of electricity instead of how long the circuit was energized. This meter was connected across a shunt in the load and consisted of several jars with zinc plates and a chemical solution. One set of jars was intended for the main reading while the second set was operated off a smaller shunt and was intended for comparision purposes (a primitive check on the meter's accuracy). The monthly reading was made by removing the plates from the jars and weighing them with a laboratory balance. The change in the plates' weight between readings was a measure of electricity consumption. This meter was very inconvenient to use, and in a couple cases mishandling of the plates resulted in large billing errors. Also, as there was no ready way to indicate the usage to the customer, this also made it hard for them to trust its accuracy. These disadvantages and the fact that this meter itself had high internal losses made it unpopular enough that these meters were rapidly replaced by more reliable meters in the late 1880's, including the Thomson Recording Wattmeter.
Courtesy: David Dahle
Thanks Dave!

Super Rod Cable Installation Tools

Super Rod Cable Rod System
Super Rod Cable Rod System -
Best Product of the Last 50 Years by members of NICEIC

#151677 - 04/30/03 10:36 PM Re: Edison Chemical Meter (1878 to late 1880s)
ThinkGood Offline

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI
Striking resemblance...

#151678 - 05/01/03 04:13 AM Re: Edison Chemical Meter (1878 to late 1880s)
Electricmanscott Offline

Registered: 01/12/02
Posts: 1478
Loc: Holden, MA USA
That actually is Mr peanut as a teenager in his first job. As it turns out the electromagnetic fields caused the loss of sight in one eye thus giving us the "Monocle craze" of '46.


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals