Mechanical dial-thermometer comprises two expansion elements, e.g. with differing thermal expansion coefficients, connected to pointer

摘要

A first expansion element (1) and a second expansion element (2) have a similar elongate structure and length, the first having a high bending strength. A limb (1.1) is attached at the end of the first element, and the second element is attached without play to one end of the limb. The other end of the first element is connected via a rotational joint (3) to a lever (12) with a pointer (4). The other end of the second element is connected to the lever. The longitudinal axis of this element lies at an angle between 45 and 135 degrees to the longitudinal axis of the lever. The spacing between the rotational joint and the intersection of these longitudinal axes is small with respect to the length of the elements. An independent claim is also included for a dial-thermometer.