Scissors: Fulcrum and Lever Mechanism

Jean-Claude Margueron of Emar in Fourteenth Century BC invented the modern Scissors.  Scissors are one of the oldest surgical instruments used by surgeons.  Scissors are used to perform many tasks in open surgical procedure but its use in minimal access surgery is restricted.  In minimal access surgery scissors require greater skill because in inexperienced hand it may cause unnecessary bleeding and damage to important structures.
(Read more: http://en.wikipedia.org/wiki/Scissors ; Sept. 7, 2012)

There are three type of lever :

Plate 38A Position of Fulcrum	38B Variable Fulcrum

(Source: http://en.wiktionary.org/wiki/fulcrum ; Sept. 7, 2012)

Plate 39A Fulcrum	39B Lever Position	39C Scissors Mechanism	39DRomantic Period, 1850