ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 10
Admin 4
Recent Posts
Any UL 508 experts out there?
by sparkyinak. 05/21/17 08:57 PM
Heat pump conundrum
by sparkyinak. 05/21/17 08:49 PM
Interesting week
by HotLine1. 05/20/17 11:57 AM
Electrical Pricing Guide
by ElectricianBud. 05/18/17 12:17 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
236,082 Are you busy
170,974 Re: Forum
164,094 Need opinion
Who's Online Now
0 registered members (), 48 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#151676 - 04/30/03 05:20 PM Edison Chemical Meter (1878 to late 1880s)  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,443
NY, USA
[Linked Image]
Quote
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
www.watthourmeters.com
Thanks Dave! [Linked Image]


Tools for Electricians:

#151677 - 05/01/03 01:36 AM Re: Edison Chemical Meter (1878 to late 1880s)  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Striking resemblance...

[Linked Image]


#151678 - 05/01/03 07:13 AM Re: Edison Chemical Meter (1878 to late 1880s)  
Electricmanscott  Offline
Member
Joined: Jan 2002
Posts: 1,457
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.



Member Spotlight
Admin
Admin
NY, USA
Posts: 3,443
Joined: October 2000
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.009s Queries: 14 (0.002s) Memory: 0.7525 MB (Peak: 0.8744 MB) Zlib enabled. Server Time: 2017-05-23 05:02:53 UTC