HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
<<  <  Page 2/2
Ann R. Thryft
User Rank
Blogger
Re: clothes pin clamp
Ann R. Thryft   6/27/2013 4:09:19 PM
NO RATINGS
What a nifty idea. And kind of obvious, in a 20-20 hindsight way, by the structure.



mattd
User Rank
Gold
Re: Clothespin Pulls Double Duty as Alligator Clip
mattd   6/26/2013 2:02:34 PM
NO RATINGS
I had a feeling my blasting cap experience would side track the article, but it was interesting.  The wiring was not a problem as the tester was located near the end of the machine and all wiring was direct from the tester to the test fixture.  The system actually tested multiple devices at the same time (as I recall, it was 8 at a time), and no they were not series connected, it actually ran separate current sources for each device.

kenish
User Rank
Platinum
Re: Clothespin Pulls Double Duty as Alligator Clip
kenish   6/26/2013 1:42:38 PM
NO RATINGS
A blasting cap tester sounds easy.  Connect it in series with a 110VAC zip cord and a pushbutton switch.  Push the button; if you hear a very loud BANG, the cap *was* good !

William K.
User Rank
Platinum
Re: Clothespin Pulls Double Duty as Alligator Clip
William K.   6/26/2013 1:25:58 PM
NO RATINGS
Interesting about the blasting cap tester. I always wondered about them.

But my guess is that you found a real challenge getting the machine builders to carry the four wires all the way to the test fixture. I have done a few four wire resistance checking machines and the wiring crew always wanted to tie those conductors to each other way back in the electrical panel. It was even a challenge keeping the wire numbers separated. What we arrived at was adding letter extensions to the wire numbers, -A, -B, and so on. But it required constant attention to make sure that no "simplifications" were done. And there were a couple of times when the engineering manager had to back me up.

mattd
User Rank
Gold
Re: Clothespin Pulls Double Duty as Alligator Clip
mattd   6/26/2013 10:17:37 AM
NO RATINGS
Interesting story, brings back memories of a project many years ago where I designed and built a dedicated 4 wire ohm-meter for testing blasting caps on a production line.  Not only did it have to be 4 wire for the low resistance but it had to have a testing current source guaranteed to stay well below the "firing current" from the very moment of connection, no inrush spikes or anything.  Needless to say, I didn't design the "clips", they were part of an automated machine.

Rob Spiegel
User Rank
Blogger
Re: clothes pin clamp
Rob Spiegel   6/26/2013 10:10:14 AM
NO RATINGS
Hey, Warren, I'll buy a half dozen. Given their simple and dependable fuctionalality, they're a deal. 

William K.
User Rank
Platinum
4-wire connecting clothespins
William K.   6/26/2013 10:01:07 AM
NO RATINGS
Steve, your idea is brilliant. Over the years I have seen a commercially made clip quite similar, but made just for that purpose. The humble spring clothespin would be a very good basis for the same function, and using the adhesive backed copper foil is a great idea, which beats the dimes glued on with epoxy, although it may have more of a corrosion issue.

warren@fourward.com
User Rank
Platinum
clothes pin clamp
warren@fourward.com   6/26/2013 8:44:59 AM
I sell calibrated clothes pins that can be used for this application for only $19.95 each.  They are ready to go as soon as you have filed them flat and added the copper and connector.  Sounds like a good deal for me, er, you... :-)

I also have a special on calibrated toilet paper centers and individual sheets of paper towels.

<<  <  Page 2/2


Partner Zone
Latest Analysis
Some cars are more reliable than others, but even the vehicles at the bottom of this year’s Consumer Reports reliability survey are vastly better than those of 20 years ago in the key areas of powertrain and hardware, experts said this week.
While risk management sounds like one activity, in order to be conducted effectively, it must be broken down into three sub-components: risk assessment, risk monitoring, and response planning.
Many of the materials in this slideshow are resins or elastomers, plus reinforced materials, styrenics, and PLA masterbatches. Applications range from automotive and aerospace to industrial, consumer electronics and wearables, consumer goods, medical and healthcare, as well as sporting goods, and materials for protecting food and beverages.
In a speech at China's National People’s Congress in Beijing this month, Premier Li Keqiang laid out plans to revamp the country's manufacturing infrastructure with advanced technology.
While many larger companies are still reluctant to rely on wireless networks to transmit important information in industrial settings, there is an increasing acceptance rate of the newer, more robust wireless options that are now available.
More:Blogs|News
Design News Webinar Series
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
3/31/2015 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Mar 30 - Apr3, Getting Hands-On with Cypress’ PSoC
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service