Baker valve gear

The Baker - control, even engl. known as the Baker valve gear, is a steam machine control that after AD Baker Company is named.

The principle originated in the A.D. Baker Company in Swanton (Ohio ), a manufacturer of traction engines. The design came from an employee named Gifford, but was patented by the company in its own name in 1903. The control prevailed in the United States and is widely used in locomotives manufactured there.

Unlike the angle lever control

The Baker - control is a further development of the angle lever control, which in turn is an improvement of the Heusinger control (outside the German-speaking world as Walschaert control known).

Because it is constructed entirely of levers with hinge pins, it is mechanically easier to maintain and beyond exact in the steam distribution than the Heusinger control.