Main parts

1) Iron cover plate 2) Stationary silver contact 3) Spring disc

4) Movable contact 5) Housing 6) Bimetal disc 7) Insulating paper

Construction

Stationary silver contact are riveted with iron cover plate.; The bimetal disc and spring disc are combined by steps on the movable contact. The current passes through the stationary silver contact to the movable contact, and then connects the housing through the spring disc to form a loop.