EXPLOSION-PROOF PUSH-BUTTON ELEMENT Russian patent published in 2006 - IPC H01H13/06 H01H9/04 

FIELD: electrical engineering; push-button switches.

SUBSTANCE: switching chamber mounted in explosion-proof push-button element case is formed at point of intersection of blind opposing cylindrical holes; open parts of these cylindrical holes perform auxiliary function and are closed upon assembly by means of end caps or lids so that normally arcing parts (fixed contacts and contact bridge) are enclosed in explosion-tight shell made by using cylindrical explosion-tight joints.

EFFECT: enhanced degree of protection against mechanical damage, ability of taking explosion pressure and preventing its escape to environment.

1 cl, 2 dwg