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
SOLDERING UNDER A MAGNIFYING GLASS
Anyone who ever worked Uborki or repair of electronic devices knows how the success of the quality and precision soldering. Great benefits this can bring the use of simple devices...
I HAVE THE PHONE RANG…
...An urgent need to record the address, name or telephone number, and, as luck would have it, no piece of paper. If you charge a roll of paper here in a homemade box, this problem will...
