The mechanism is intended for regulating the admission and exhaust of steam. Eccentric cam 1, rotating about fixed axis B, is connected by connecting rod 2 to slider 3 which turns about fixed centre C. Connecting rod 2 has collar a which encircles eccentric cam 1. Tie-rods 6 and 7 of the admission and exhaust valves are connected at points D and E to connecting rod 2. When eccentric cam 1 rotates, points D and E move along paths whose position can be varied by changing the angular position of guides x-x of slider 3. This is accomplished by link 4 which is connected to the governor. The two extreme positions of the guides, x-x and x-x' , are shown with the corresponding paths of pivot D.
$1326$LG,G$