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retractable mechanism

By khuram on 23 Feb 20:40 0 answers 2306 views 0 comments

you have seen the measuring tape mechanism i.e a cord/strip is attached to a spiral spring e.g http://monkeyroom.blogspot.com/2010/05/measuring-tape-fix.html

In this mechanism cord is attached at one point & mechanism is retractable.
Can we attach the 04 cords to a single spring or one spring can guide the 04 cords ??

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