A circuit breaker is disclosed which includes a plurality of fixed contacts and a plurality of corresponding movable contacts. After a pre-determined amount of time of exposure to the treatment smoke at a controlled temperature and humidity level, the wooden materials will exhibit increased resistance characteristics. The positioning arms further comprising locking pivots for extending and retracting. Also provided are safety mechanisms to promote the safe and advantageous use of the UV device. In this case, the rake face is formed by at least two cutting faces merging into one another at at least one second cutting edge. Further, the apparatus may include an analysis device for determining at least one characteristic of the environment based at least partially upon shift in a steady-state oscillation frequency of the vibratory source for the given impetus.