JOY'S VALVE GEAR FOR DIAGONAL ENGINES.    205

links, L<sub>2</sub>, the upper ends of these being coupled first to sliding
blocks, S B (working in curved guides, C G), and the ex-
treme ends to the valve connecting-rod V R, which terminates
at and is fixed to the valve spindle, V S, with its accompanying

[diagram of Joy valve gear]

JOY'S PATENT VALVE GEAR.

slide valve, S V.  The lower end of the double links, L<sub>1</sub> L<sub>1</sub>, is
connected to a radial rod or link, L<sub>3</sub>, terminating in a fulcrum,
F, fixed to a bracket on the high-pressure cylinder, H P C,