The Bal Contact, an electrically conductive canted-coil spring from Bal Seal Engineering Inc., Foothill Ranch, Calif. (www.balseal.com), maintains nearly constant force over a range of working ...
Spring technology for damping is relatively old. Stagecoaches had leaf springs, early trains had large, crude, coil-spring buffers (to absorb shocks when cars bumped together) and early automobiles ...