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Description: |
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In a variable cutoff valve gear for locomotives, the combination with the main frame, reach rod, eccecntric rod, cross head and slide v alve, of a gear frame mounted on the main frame, a bell crank journaled in the gear frame, and having one arm pivotally connected to the forward end of the eccentric rod, a rock shaft journaled in the gear frame having one arm connected to the valve by the valve stem, and one arm for rocking the shaft, a lever pivoted by one end 1 to the actuating arm of the rock shaft and having the opposite end linked to the cross head, a radius link pivoted by one end to the lever near its pivotal connection to the rock arm, a link connecting the opposite end of the radius link to the other arm of the bell crank, a bell crank rocker journaled on the gear frame amid having one arm pivoted to the reach rod, and a radius rocker pivoted to the outer end of the other arms of the rocker by one end, and pivot ally connected by its opposite end to the radius link at a radial distance equal to the radial distance of its pivotal connection to the rocker from the pivot of the rocker. |
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