Snap-action switch

An electrical snap-action switch, which includes a strip of a springy metal held captive in a metal carrier member, the strip being so mounted that it is bowed and can assume either a first or a second stable position, wherein a contact-carrying arm integral with the bowed strip extends generally parallel thereto from one end of the bowed strip towards the other end thereof, so that when the strip is snapped between its said positions the arm is switched from its first position to its second position, the arm's contact means engaging stationary contact means in at least one of its said positions, wherein the carrier member has a concavely curved inner face close to which the bowed strip lies in its first position, wherein the carrier member is in electrical contact with an external terminal of the switch and also with said one end of the bowed strip and thus with the contact carrying arm, and wherein a switch actuating member engages the bowed strip at a position between its mid-point and its said other end, the operation of the actuating member snapping the bowed strip between its said position and thus switching the contact-carrying arm between its two positions.