In about an hour the engine can be started by a turn of the throttle-valve.
The engineer may draw his throttle-valve and give the piston full head.
This end was attained by a contrivance afterwards called the throttle-valve.
The devices for controlling the steam are the throttle-valve and the valve-gear.
No helm, or ballast, or throttle-valve could avail them now.
The throttle-valve T in that pipe, near the cylinder, is regulated by a system of levers connected with the governor.
It represents, in the phrase of the inventor, the finger laid upon the throttle-valve of a steam-engine.
Where the latter form is made, the throttle-valve is placed in the forward dome.
In that position the passage within the tube would be necessarily unobstructed by the throttle-valve.
In some engines, as the locomotive, there is no governor motion, and the throttle-valve is consequently used by hand.