Defn: The width of port opening which is uncovered by the valve, for the admission or release of steam, at the instant when the piston is at end of its stroke.
Note: When used alone it means outside lead, or lead for the admission of steam. Inside lead refers to the release or exhaust.
8. (Civil Engineering)
Defn: the distance of haul, as from a cutting to an embankment.
9. (Horology)
Defn: The action of a tooth, as a tooth of a wheel, in impelling another tooth or a pallet. Saunier. Lead angle (Steam Engine), the angle which the crank maker with the line of centers, in approaching it, at the instant when the valve opens to admit steam. — Lead screw (Mach.), the main longitudinal screw of a lathe, which gives the feed motion to the carriage.
LEADED
Lead"ed, a.
1. Fitted with lead; set in lead; as, leaded windows.
2. (Print.)
Defn: Separated by leads, as the lines of a page.