| 摘要 |
The electric circuit controlling device has a snap acting member disposed in a housing and is adapted for successive discrete snap action motions from a stable configuration toward two unstable configurations. A pair of means are operable generally for switching between two circuit controlling modes and an actuating means is operable generally in response to the successive discrete snap action movements of the snap acting member for selectively operating the pair of switch means between the circuit controlling modes. A force transmitting means has at least two different force applying portions selectively associated in operating relation with the snap acting member to cause the successive discrete snap action movements from the stable configuration toward the two unstable configurations at different force levels. The device is provided with an adjusting arrangement wherein the magnitude of at least one of the two different force levels can readily be changed. A method of operating the electric circuit controlling device and a method of applying a calibrating force against the snap acting member are also disclosed.
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