It is currently Fri Dec 15, 2017 12:41 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Semaphore part needed
PostPosted: Mon Mar 21, 2016 11:29 am 

Joined: Tue Aug 02, 2005 1:25 pm
Posts: 5023
One of the operable signals that we have on our museum line is an Erie Railroad US&S type S semaphore. The head of our signal department is looking for a spring (see photo) for this signal as this one is "nearly shot" as he describes it. Anyone that might be able to help, please contact me.

Thanks!


Les Beckman (Hoosier Valley Railroad Museum/North Judson, Indiana)


Attachments:
US&S spring for Erie semaphore M. Lasayko photo.png
US&S spring for Erie semaphore M. Lasayko photo.png [ 230.05 KiB | Viewed 1439 times ]
Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Mon Mar 21, 2016 1:34 pm 

Joined: Sun Aug 22, 2004 7:58 am
Posts: 728
It might be worth contacting associated Spring, and seeing if they would be willing to have their prototype shop wind a few.

In a previous life I found them to be very responsive to requests for prototypes. You're not an industry that will buy thousands of course, but they might be willing to help. Worst case, they could quote on a short run.

http://www.asraymond.com/products.html

Steve Hunter


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Mon Mar 21, 2016 1:55 pm 

Joined: Mon Aug 23, 2004 12:59 pm
Posts: 525
It looks like it might be a stock torsion spring. Maybe McMaster-Carr or Century Spring can help.


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Mon Mar 21, 2016 3:06 pm 

Joined: Tue Sep 22, 2015 12:36 pm
Posts: 184
When looking for the spring you need the wire size (measured with a micrometer) number of turns and length of the arm. Outside diameter of the coil helps as well. You may have to bend the hook in the end yourself to match the original. Material is more then likely music wire.

_________________
"What smells like Lube Oil and Diesel? Oh It's just my Locomotive Breath"


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Mon Mar 21, 2016 3:45 pm 

Joined: Mon Aug 23, 2004 12:59 pm
Posts: 525
You also need the direction of wind (right- or left-hand), and the angle between the legs when spring is relaxed.


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Mon Mar 21, 2016 10:06 pm 

Joined: Fri Aug 20, 2010 8:25 pm
Posts: 248
Looks likes McMaster-Carr has a pretty good selection of "typical" torsion springs;

http://www.mcmaster.com/#torsion-springs/=11n54ce

And they do offer a custom spring winding service if you can't find something stock that will work.

So, I would remove the spring from the mechanism and measure it carefully (wire diameter, coil ID and/or OD, number of turns, leftie or righty, length of the legs, and the relaxed angle between the legs).

I bet you can find something pretty close in that list. You may have to buy a couple since they are often sold in packages of 6 for the smaller ones.

For these small orders the shipping can exceed the cost of the parts. I usually keep a list of "stuff" to order from McMaster-Carr and once it gets up to about $50 I'll place an order. The shipping for $5 worth of parts or $50 worth of parts is about the same. So some special nuts, bolts, taps, etc, I'll just wait until I have a big enough list to make the shipping worthwhile. But McMaster-Carr will gladly sell you one item for $2 if that's all you need.

McMaster-Carr is a great source of parts for "older" and "unusual" stuff. I purchased a single 1-1/2" LEFT hand threaded hex nut from them a while back, were else could you find that ??

Good luck, Kevin.

PS: I do not work for McMaster-Carr, just a satisified customer.


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Tue Mar 22, 2016 1:54 am 

Joined: Sat Feb 05, 2005 1:05 am
Posts: 400
Just to file in the back of your mind. Next time you are looking for spring rigging/brake pins and bushing, check the local John Deere service center. They have an assortment of pins/bushings in nominal inch sizes and lengths for their tractors/front end loaders. At least that was the case a few years ago.


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Tue Mar 22, 2016 7:28 am 

Joined: Thu Apr 14, 2005 9:34 pm
Posts: 1896
Location: Copenhagen, Denmark
You can make your own. Buy music wire of the same diameter, set your lathe to the similar number of threads per inch, and wind on a mandrel about 10 percent smaller than the desired internal diameter.

_________________
Steven Harrod
Lektor
Danmarks Tekniske Universitet
Institut for Systemer, Produktion, og Ledelse


Offline
 Profile  
 
 Post subject: Re: Semaphore part needed
PostPosted: Tue Mar 22, 2016 10:26 am 

Joined: Tue Sep 22, 2015 12:36 pm
Posts: 184
Most spring companies offer free engineering samples try Allied, Associated, Lee, and Century Spring. These are the guys making them for McMaster and others. Some of them even have design tools on their websites to help you match the spring you need with stock items.

More then likely the original was a standard off the shelf spring at one time as production levels of this kind of equipment were not high enough to warrant custom springs. Often when I design equipment that needs a spring I will change my designs to match a standard mass produced spring as custom springs are cost prohibitive in my numbers.

_________________
"What smells like Lube Oil and Diesel? Oh It's just my Locomotive Breath"


Offline
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours [ DST ]


 Who is online

Users browsing this forum: Bing [Bot], Google [Bot], rjenkins, Steve A W, TieGang, Yahoo [Bot] and 40 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: