1941 examples of screw in sentences

Therefore even the selfish policy of shrewd corporations to-day is to screw up, and not down; while the more philanthropic are beginning to see, in their social power, a luminous opportunity to do a god-like service.

The wood, which was all cut to the same length, and channelled out to admit the free passage of the air, was then duly placed in the stove, and set on fire; but the heat not passing very readily through all the sinuosities of the pipe, he ordered his head cook to screw on his exhauster.

Presently the Wolverine's engines slowed down, and she lay head to the waves, with just enough turn of the screw to hold her against the sea-way.

The dull throb of the screw pulsated.

In that heap of rubbish he had found a lathe for turning irregular forms, and a screw-cutting engine once used by Peter himself: specimens of his unfinished work were still in them.

I ventured to unscrew one of my chairs, which were always fastened to the floor; and having made a hard shift to screw it down again, directly under the slipping-board that I had lately opened, I mounted on the chair, and, putting my mouth as near as I could to the hole, I called for help in a loud voice, and in all the languages I understood.

The lower portion of the instrument as formerly made for me by the late Mr. Tisley, optician, Brompton Road, is a cap that surrounds the body of the whistle, and is itself fixed to the screw that forms the plug.

One complete turn of the cap increases or diminishes the depth of the whistle, by an amount equal to the interval between two adjacent threads of the screw.

For mechanical convenience, a screw is used whose pitch is 25 to the inch; therefore one turn of the cap moves the plug one twenty-fifth of an inch, or ten two-hundred-and-fiftieths.

If triple expansion were adopted, then new engines would be wanted, but the present crank and screw shafts would answer perfectly.

[Illustration: TWIN SCREW TORPEDO BOAT FOR THE ITALIAN GOVERNMENT.]

These are all twin screw ships, and each of the twins is driven by its own set of engines and line of shafting, so that the propelling machinery of each ship is duplicated throughout.

The principal purpose of this paper is to record the particulars of the propellers, and the results of the trials of several of these high speed twin screw ships.

The frictional resistance of screw propellers is always a fruitful source of inefficiency.

It appears that within certain limits mere shape of blade does not affect the efficiency of the screw, but, with a given number of blades and a given disk, the possible variations in the form or distribution of a given area are such that different results may be realized.

Immersion of | 9 ft | 5 ft | | 4 ft | 2 ft | 1 ft screw.

of the speed of the screw, which is probably an average of widely different conditions, including many single as well as twin screw ships.

For instance, a screw with a large positive slip in smooth water is frequently inefficient at sea against a head wind, which increases the resistance, and necessitates an increase of slip.

She was first engined with the pitch equal to the diameter, and she gained two knots or thereabout when the diameter was reduced 2 ft. and the pitch increased 2 ft. Admiral De Horsey said that he tried experiments with the single screw in the Aurora.

Their finest and fastest ships were single screws, probably because, in very bad weather, the single screw was better.

In the case of the Inflexible it was found, owing possibly to the position of the screw, that the whole of the plates immediately over the screws were damaged.

As to the point of safety, he thought it a great advantage to have twin screws, and on two occasions twin screw vessels had met with accidents which, but for the twin screws, would have necessitated their putting back to New York for repairs.

No difficulty had been found in the docking and undocking of these vessels, either in London or Liverpool, and while with single screw vessels they had sometimes to employ one or two dock boats to dock and undock them, they never had to do so with the twin screw vessels.

7.] But the screw cone system is not the only compensator used in sewing machinery; where it cannot be easily introduced, other devices have been employed.

In the Singer machines the same excellent device has been adopted, hemp packing and screw bushes being used (Fig.

1941 examples of  screw  in sentences