US Patent 7479609 Adjustable snap action switch

A snap action switch (12) which includes an M-type actuator having an actuation location that can be depressed to cause a middle contact to snap up against an upper contact, and which can be released to cause the middle contact to snap down against a lower contact, which enables adjustment of the position at which the middle contact snaps against a selected one of the upper and lower contacts. The adjustment of a snap position of the actuation location is accomplished by raising or lowering the position of one of the upper or lower contacts.