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40 Inventive Principles
Continuity of Useful Action

a) Carry out an action continuously, without pauses. All parts of an object should operate at full load.

b) Eliminate all idle and intermittent actions or work.
 

EXAMPLE:
  1. A cutting tool which cuts in both forward and in reverse directions.
  2. The electricity generated during the braking of electrically driven machinery can be fed back into the mains supply, instead of being converted into heat at the braking resistors.