Temp controller using thermal expansion element - expansion controls rocker initiating switching process

摘要

The switch is in the form of a snap-action switch mounted on the rocker, and the switching instant can be manually adjusted through a control shaft. A pretensioned spring (15) is between the control shaft (9) and (14) and adjacent to its rocker (6). The rocker (6), moved about its pivot (8) by the shaft (9), is limited in its movement by a stop (19). The rod-like thermal expansion element (1) is fitted to the base plate (3) of the switching housing (4) with the end of its surrounding tube (2). The end section (5) of the expansion element penetrates the housing and is coupled with a pivotally mounted lever (20).