The coupler-flange is the flanged end of the crankshaft where it bolts to the thrust bearing. The Spindle Guide is a component of the one-way valve through which steam flows from the boiler to the main steam line which supplies the engine throttle valve. Some engines incorporated a valve arrangement that used guides above and below the cylinder steam valves. The time period between midnight and 4 A.M., and noon and 4 P.M. Common usage refers to the period beginning at midnight.
Deck officers use the number of turns to measure the ship's speed and distance travelled.
An' Ferguson relievin' Hay. During the four hours of his watch Ferguson increased the engine revolutions from 70 per minute to 73. The Captain or the mate on watch would never notice such a gradual change in engine speed. Tow was often used as a packing or gasket material in low-pressure applications. The engine and boilers were located beneath the house.