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Spring for batteries

 
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pv17vv



Joined: 22 Dec 2001
Posts: 255
Location: The Ardennes, Belgium

PostPosted: Wed Oct 11, 2006 10:06 am    Post subject: Reply with quote

What kind of spring ( shape, size, strength, ... ) goes at the bottom of the battery case of a Graflex mod 37 synchronizer anno 1940 to help batteries make contact with the circuit ?
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SYNCHROJAMES



Joined: 12 Jun 2007
Posts: 36
Location: SAN DIEGO CA

PostPosted: Wed Aug 01, 2007 9:27 pm    Post subject: SPRING FOR BATTERIES Reply with quote

I would salvage the spring from any hand flashlight (torch) that takes size "D" batteries-that should do the trick nicely
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Henry



Joined: 09 May 2001
Posts: 1442
Location: Allentown, Pennsylvania

PostPosted: Thu Aug 02, 2007 12:05 am    Post subject: Reply with quote

Commonly known as "phosphor bronze," the stuff that metal weatherstripping for exterior doors is made from, is an excellent conductor and has enough "springiness" to make good electrical contact, and it's durable. I renewed a contact in my wall oven (220 V) with the stuff, so it should withstand anything that small batteries can produce. Buy a roll of it at the hardware store and you'll have a lifetime supply, and enough of it to play around with different shapes to get the best configuration for your purposes.
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pv17vv



Joined: 22 Dec 2001
Posts: 255
Location: The Ardennes, Belgium

PostPosted: Fri Aug 03, 2007 4:58 pm    Post subject: Reply with quote

Thanks Gentlemen !
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