LEVER MECHANISM OF A BAROGRAPH

Each of the four membrane boxes 1, connected to one another in series, contains spring 2 whose purpose is to ensure proportionality of the barograph scale. Upon a change in atmospheric pressure the whole system of boxes is deformed and this motion is transmitted by pin 3 to link 4, which is connected to link 3 by turning pair B and turns about fixed axis A. Connecting rod 5 is connected by turning…