Ripper, William, 1853-1937 · London, New York [etc.] : Longmans, Green and co. · leaf 398
The slot itselfis formed in a disc or block, which is pivoted on a centre whichcoincides with the centre F of the lever E at the moment when thatlever is in the position due to the piston being at either end of thestroke. The disc or block containing the slot is capable of beingpartially rotated on… … 376 STEAM-ENGINE THEORY AND PRACTICE. to cross the vertical arc, and thereby give the valve spindle thorequired horizontal movement.
Steam-engines
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