Shaft 1 with its rigidly mounted cross-piece a rotates about axis x-x. Bent levers 5 turns about axes A and B. Pins b of levers 5 slide along groove c-c of sleeve 4 which slides along the x-x axis of shaft 1. Link 2, turning about fixed axis C, has pin d which slides along groove e of sleeve 4. Link 3, connected by turning pair D to link 2, is connected at its other end to the throttle valve. Spring 6 connects link 2 to the upright. Spring 7 links together weights m of levers 5. When the rotational speed of shaft 1 changes, weighted levers 5 shift sleeve 4 along shaft 1. This turns link 2 which displaces link 3, thereby changing the setting of the throttle valve.
$1329$LG,G$