Apparatus to indicate the trend of a measurement value, especially of the barometric pressure of the air, to descend or grow. (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus for indicating the tendency of a measurement value, especially of the barometric pressure of the air, to descend or to grow, wherein the movement of a driving arm or similar element is transmitted by means of a driving member, depending on the direction of movement to different contact elements of a switching element, and depending on the contact element requested, a corresponding tendency is indicated, for example ascending or descending, characterized in that the actuating arm or similar element moved by the variation of the measurement value it carries as a driving member a leaf spring, whose two leaf springs cross with friction closure to the perforation of a central contact element and at the same time are under an elastic force of the springs of these springs of leaf springs, oriented away from these crossbows with each other, and because this contact element is supported so ticulado and freely tiltable. (Machine-translation by Google Translate, not legally binding)