| 摘要 |
A safety switch, in particular for thermal protection of an electrical apparatus, comprises a container inside which means for activation of said switch is housed, said means comprising a command key and a pair of contact carriers, that are movable and fixed respectively, and a thermoprotector device responsive to temperature variations in the environment to be controlled and adapted to act on the electric supply circuit of said apparatus depending on the perceived heat level. Said movable contact carrier oscillates between two positions, an open position at which said contact carriers are separated from each other and respectively a closed position, at which said contact carriers are in mutual contact, each of said positions being imposed by a corresponding position cf said command key. The thermoprotector device acts in case of need on the electric supply circuit and separates the contact carriers from each other by forcing the command key to the open position. This action deactivates the. thermoprotector device and the switch therewith, and a new activation of the latter can only take place by exerting a pressure on the command key capable of bringing the key again to the closed position and set the thermoprotector again ready for operation.
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