Abstract: A snap-action mechanism for an electrical switch, such as a pushbutton, which has an operator for reciprocally moving an overcenter operated contact by means of a drive toggle actuated mechanism to provide positive actuation of the contact through lost motion connection between the various operating members. The mechanism combines the antitease action of a snap switch with the opening ability of a directly operated slow action switch. The application of the direct opening force is not dependent on any springs and occurs in both directions of travel of the switch actuator.