Glossary Results for Word "Stephenson’s Valve Gear"
|Stephenson’s Valve Gear||A steam-engine valve-gear which is usually located between the main frames of a locomotive. Motion is taken from two eccentrics secured to one of the driving axles. From these, two rods (the eccentric rods) are connected to either end of a link (the expansion link), which is thus oscillated. Movement of the valve spindle is taken from a die block which is free to slide within the expansion link. Reversal is carried out by moving the expansion link bodily, so that the die block takes up a new position at the other end of its slide.|