This device is not very complicated and consists of the heating element, the mercury column and the solenoid. When the current is switched on starts to operate the heater — closed working contacts of the relay. When it starts to heat up the mercury, and the column rises to the level of the contact turns on the electromagnet. It attracts the contact 1, and the heater is switched off. With the decrease of temperature the mercury goes down, severing contacts, the electromagnet is deactivated. The result is again connected to the terminals 1 and 2, and the heater turns on again.
Recommend to read
PUMP… CYLINDER
Ingenuity rural operators will not refuse. I had the opportunity again to be sure, when one major economy saw operating safely pumps made by local craftsmen from the brake cylinders...
RINGED HANDLE
Simple device — the plastic handle in the form of a groove — protects hands like reducing the weight of his burden. However, the trouble is, it has one unpleasant disadvantage — is often...
