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Updated: June 17, 2025
A furious head of water was rushing along the race; the great wheel creaked and swung over, and with a shudder the old mill awoke from its long sleep. The cogs clenched their teeth, the shafting shook and rattled, the stones whirled merrily round.
There is a difference in efficiency of from 15 to 20 per cent. in these two sizes of motors, but this difference is fully lost to the large motor in driving the shafting, and the small motor still has the advantage of being out of circuit entirely when the machine it is driving is stopped. There is scarcely a manufacturing industry which does not possess its busy and dull seasons.
From the first class armored fighting ship of about 10,000 tons displacement down to the comparatively diminutive cruiser of 1,500 tons, the very desirable quality of a high speed has been provided. 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.
For 3 hours this load was practically constant, when it was thrown off entirely. This gave on the night service but 30 per cent. of the contract hours. This motor required 5 amperes to drive the shafting, and but 8 amperes or one H. P. to drive the three job presses with the cylinder press off.
With the ordinary reciprocating type of marine steam machinery it would be impossible to place, in a steamer of moderate tonnage, engines of a size suitable to enable it to attain a very high rate of speed, because the strain and vibration of the gigantic steel arms, pulling and pushing the huge cranks to turn the shafting, would knock the hull to pieces in a very short time.
Some years later, also, Daft again tried friction gear in his historical experiments on the Manhattan Elevated road, but the results were attended with no greater success. The next resort of Edison was to belts, the armature shafting belted to a countershaft on the locomotive frame, and the countershaft belted to a pulley on the car-axle.
"Danger!" That sign might have been over an air-hole in the ice; or it might have been near rapidly moving shafting and belting in a factory. As a matter of fact, the letters, white against the red paint on the door of the shed, meant danger in the most terrible form. It was the sort of danger, which, defied too far, would send one traveling skyward.
This should be done either by shafting or by opening with 'steam-navvies' the whole course of the channel during the 'Dries. Regaining the main road and passing towards the northern town, which is separated from southern Axim by the fort and the grassy drill-ground, we cast a look at a heap of rotting cases at last stored under a kind of shed.
The designer was one El Osta Abdullah, a former employee of General Gordon's in Khartoum Arsenal. There were several steam engines; the principal one driving the main shafting was of 28 horse-power. The fly-wheel was 4 feet in diameter. There were five lathes, one cat-head lathe 36 inch, three drills, and other tools including a slotting machine, all in perfect going order.
Significance proceeds out of wholeness or unity of impression; and unity is made possible by design. Whatever the flower into which it may ultimately expand, beauty has its roots in fitness and utility; design in this case is constituted by the adaptation of the means to the end. The owner of a saw-mill wanted a support made for a shafting.
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