22 May
2004
22 May
'04
9:08 a.m.
At 07:18 PM 5/21/04 -0500, you wrote:
On Fri, 21 May 2004 16:35:57 -0400
"Joe R." <rigdonj(a)cfl.rr.com> wrote:
If it uses a springy contact, that's true. It all depends on what kind of
contact it had. Most of the ones that I work on are flat and backed up by a
plastic wall. BTW i found that the disposable cameras are a good source of
the springy contacts. They look like brass but are springier. I have a
friend that works in a photo shop and he gives me all the cameras that I
want. They're a great source of batteries! And they use some surprisingly
good parts in them. BTW I found that the local surplus store has some of
little curly pointed springs that are made of silver plated steel. I bought
a couple of hundred of them. They have a "tail" on the big end that sticks
straight out to the side and they're easy to solder to or to reshape to fit
into battery compartments. I made hundreds of springs sets for the HP-41
battery holders by soldering two of them together.
Joe
You can steal
Clean them them with Lime-Away (full strength).
Wash with with plain
water and dry. Then solder on copper or nickel plated brass or steel
sheet to form new contacts.
Joe
At 10:46 AM 5/21/04 -0500, you wrote:
>I have several items (calculators, robots, Mac's, etc) that I'm
>trying to restore and the battery acid has eaten away the battery
>contacts. Anyone have a easy way or source to get new contacts to
>replace the damaged ones? Thanks
>
>
If you need contacts that are 'springy' you would be better off using
phosphor-bronze contacts salvaged off something else. them from a junk transistor radio or other portable
equipment. Ordinary
steel, copper, or brass won't retain shape for long. I used to do 'drop
tests' on medical devices with battery compartments earlier in life.