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
GRINDS DRILL
A wonderful sander is obtained from the drill, you only need to equip it with a set of abrasive tools. Some of them are easy to make yourself. In particular, to make a cylindrical...
THE MOTOR-PLOW — WHEELS OF… CONCRETE
Well, the small tillers, in which the working body — a milling cutter biting into the ground with its rotating blades, it not only loosens the soil but also helps the tillers to move, as...
