Holding tongs for holding printed circuit boards suspended in a galvanizing bath includes two halves, of which the movable half is subdivided into two portions pivotable relative to the stationary half of the tongs against the action of the springs. Both halves of the tongs have clamping projections...http://www.google.com.au/patents/US4767146?utm_source=gb-gplus-sharePatent US4767146 - Holding tongs
