Constant Force Springs - Data Sheets?

[Ben Piecuch]

Here's a tough question for you all. In previous years we were supplied some constant force springs in the kit of parts. These springs are typically used in tape measures, window counter-balance devices, etc... I seem to remember a data sheet being supplied with these (back in '00 or '01), but I can't seem to find a copy of one anywhere.

Specifically, I'm looking for more info on these springs:
- The Vendor
- The Part Number
- The Force Rating

I'm presently doing some testing with constant force springs from other manufacturers, and the results I'm getting from the left-over FIRST supplied springs are much better. If anyone has a copy of the spec sheet and could scan it, post a link, anything, it would be greatly appreciated. Thanks in advance.

Bengineer

[Manoel]

From the 2001 FIRST Robotics Competition Manual, section "The Robot":



And:



Hope that helps