LEVER MECHANISM OF A THERMOELEMENT

Tube 1 is made of a material with a larger coefficient of linear expansion than that of rod 2 inside the tube. The outer end of rod 2 is rigidly attached to tube 1 and the inner end slides in guide bushing 3. This end of rod 2 contacts the tip of screw 4 which is screwed into lever 5. Lever 5 has two supports 6 on which it turns. On its other end, lever 5 has shutter 8, opposite which is cylindric…