A second member 13 is provided with a recess 14 defined thereon, preformed friction spring elements 17 are positioned on the second member 13 by sliding the elements 17 on member 13 at the recessed end as explained in {HEAD ~ conjunction} with {TAIL ~ the description} of FIGS 4 and 5 
with
A second member 13 is provided with a recess 14 defined thereon , preformed friction spring elements 17 are positioned on the second member 13 by sliding the elements 17 on member 13 at the recessed end as explained in { HEAD ~ conjunction } with { TAIL ~ the description } of FIGS 4 and 5
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