(57) A switch (1) comprises a housing (2) in which at least a pair of fixed contacts (6a,
6b) and at least a movable contact (8) are located. The positioning of the movable
contact (8) is controlled by a cam element (12) pivoted to the housing (2) and movable
from one working position in which the fixed contacts (6a, 6b) are electrically connected
to each other, to a second working position in which a lifting arm (17) of the cam
element (12) separates the movable contact (8) from one of the fixed contacts (6b).
A thrust element (21) oscillatably pivoted to an operation key (11) selectively acts,
in cooperation with a release spring (14) associated with the cam element (12), on
locating seats (18a, 18b) provided in said cam element, to bring the latter from its
first to its second working positions and viceversa upon operation of the key (11).
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