| 摘要 |
A non-resettable heat responsive safety switch featuring two contact sleeves inside a jacket with a displaceable intermediate contact body of metal granulate, a preloaded compression spring biasing the contact body in the direction of contact interruption, a normally solid trigger body of fusible material holding the contact body in its normal, sleeve-bridging position, against the spring bias, until, at a critical temperature level, the trigger body yields to the spring which moves the contact body and breaks contact in the switch.
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