| 摘要 |
A moisture and tamper proof lid switch on a clothes washer top is magnetically operated by a magnet carried on the swinging edge of the washer access lid. The switch has one pair of stationary contacts. A second pair of movable contacts is loosely supported by a spring on a ferromagnetic plunger and adapted to close on the stationary contacts and compress the spring when the lid is closed and the magnet is next to the plunger. As the lid is opened, the compressed spring induces movement in the plunger which impacts on the movable contacts to open the lid switch suddenly and surely.
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