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Updated: June 7, 2025
In view of the fact that a turbine by-pass valve opens only when the unit is required to develop overload, or the vacuum fails, a good feature of this governing mechanism is that the valve referred to can be kept constantly in motion, thereby preventing sticking in an emergency, even though it be actually called into action only at long intervals.
The valve balls should, of course, be of gun-metal or brass, and the seatings must be prepared for them by hammering in a steel ball of the same size. In practice it is advisable to keep the pump always working, and to regulate the delivery to the boiler by means of a by-pass tap on the feed pipe, through which all or some of the water may be returned direct to the tank.
Where the Heavens is that blighted by-pass?" He beat his right or throttle hand madly on the side of the car till he found the bent rod that more or less controls the pump, and, neglecting all else, twisted it furiously. My engineer grabbed the steering-bar just in time to save us lurching into a ditch.
Reviewing history we check man's past actions and learn by so doing. It is our opportunity, our destiny, and our responsibility to keep on living, constructing, creating. We must live, not die. We must not stop. We must go on. By such steps we humans could by-pass the restrictions and limitations imposed on human creative genius by the structure and function of civilization.
Astro's involved and detailed reply in engineering terms was almost gibberish to Tom, but he understood enough of the unit construction to sense that Astro had done something extraordinary. "And he did it all himself, too," said Sid quietly. "I didn't do any more than hold the tools." "But I still don't understand," protested Kit. "The by-pass won't take more than D-18."
You've counted on the fact that war powers have to attack other powers nearby before they can safely strike against Earth, and you've buffered yourself with a jury-rigged economic trading system. But what happens when some really bright overlord decides to by-pass his local enemies? He'll drop fifty planet bombs out of your peaceful skies and collect your vassal worlds before they can rearm.
The knight smiteth Messire Gawain on the shield whereof he had no great defence, and passeth beyond, and in the by-pass the knight to-brake his spear; and Messire Gawain smiteth him with his spear in the midst of his breast and beareth him to the ground over the croup of his horse, all pinned upon his spear, whereof he had a good full hand's breadth in his breast.
"We built another one," said Astro proudly. "Since you were making a small unit, you naturally built a small by-pass feeder. We made a big one." Astro grinned.
Beyond the Roman Empire lay territories and peoples associated with Rome by treaties, bound to Rome by trade and travel, in some cases paying tribute to Rome, but enjoying sufficient autonomy as peoples, nations and empires maneuvering for position and advantage, frequently allying themselves with non-Roman areas and occasionally conspiring to by-pass Roman authority and even to challenge Roman supremacy.
The American artist heard with a vague smile the difference between the ordinary four-cycle engine of an automobile, and the two-cycle engine of this marine motor, with its piston receiving an impulse at each down stroke; tried to understand how the charge of vaporized petrol was drawn into the crank-chamber, and there slightly compressed; how the gas afterwards traveled along a by-pass into the firing chamber at the upper part of the cylinder, to be further compressed by the up-stroke of the piston and fired by the sparking plug, while the burnt gases escaped through a port uncovered by the piston in its downward strokes, admission and exhaust being thus controlled by the piston movement alone.
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