Electric switch of the normally open type

An electric switch of a normally open type, including:

• a body made of insulating material;
• an actuator which is moveably installed with respect to the body between a high rest position in which the actuator abuts against a facing portion of the body, and a low active contact position;
• a first contact blade supported by the body which is elastically deformable when action of the actuator between:
• the high rest position in which the first contact blade elastically abuts upwards against a facing portion of the actuator, the actuator being elastically returned to its high rest position by the first contact blade, and the low active contact position;
• and a second contact blade supported by the body which is elastically deformable downwards from a rest position in which it elastically abuts upwards directly against the facing portion of the body, or indirectly with interposition of a part of the actuator, wherein:
• a first contact section belonging to the first contact blade extends above a second contact section belonging to the second contact blade, the first and second contact sections are superposed and are vertically distanced from each other when the actuator is in its high rest position, and are in mutual electrical contact when the actuator is in its low active contact position so as to establish an electrical switching path, the first and the second contact sections are arranged in parallel and in opposite directions, and the second contact section includes a central opening which is able to accommodate the first contact section.