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  #11  
Old 11-20-2012, 11:47 PM
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dubby dubby is offline
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I have some .035 stainless spring wire, I might could bend you something up or coil some up and ship it out to you if it'd help?
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  #12  
Old 11-21-2012, 03:54 AM
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Here's a quickie design that I have used in the past. There are many variations to this design to fit certain applications.

I have shown the spring steel (red) as a very thick piece of metal but in reality it is a thin tempered strip. The dimensions of the spring will change to achieve the amount of return-to-center force required.

The main shaft (blue) as I have sketched it is simply a square rod with machined ends to meet the round diameter requirements. You can also use a round rod and file/machine a "flat" section for the spring arms to rub against. The key to success on this design is to make sure there is a small amount of silicone grease on the "flats" and on the round shaft ends (unless you are using ball bearings).

For light duty applications you can use spring steel piano wire for the spring material.

I hope this helps.
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  #13  
Old 11-22-2012, 06:40 PM
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Andy, Here's a bit of info that might help you out.
http://home.earthlink.net/~bazillion/intro.html
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  #14  
Old 11-22-2012, 08:43 PM
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This might somewhere to start. I think you could start with a sliding barn door latch.

I googled barn sliding door latch.
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