. Appleton's dictionary of machines, mechanics, engine-work, and engineering. Fig. 3069 shows the largest size, weighing 2cwt. 3 qrs. 14 lbs., adapted for whole timber piles,which are often so splintered and shattered, andeven set on fire, by the rapid blows of the steampile-driver, when traversing compact ground, andwhere wrought-iron shoes are generally crushedinto the timber even in ordinary ground, withthe force of the common pile-engine. The smallscrew-point opens the way for the conical part,and the larger screw not only draws the piledown, but, when it has penetrated to a sufficientdept
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. Fig. 3069 shows the largest size, weighing 2cwt. 3 qrs. 14 lbs., adapted for whole timber piles,which are often so splintered and shattered, andeven set on fire, by the rapid blows of the steampile-driver, when traversing compact ground, andwhere wrought-iron shoes are generally crushedinto the timber even in ordinary ground, withthe force of the common pile-engine. The smallscrew-point opens the way for the conical part,and the larger screw not only draws the piledown, but, when it has penetrated to a sufficientdepth, affords an extended base for preventingfurther depression. Thus several feet of timbermust be saved, and the general length of tbe pilecan be reduced, as it will bear a greater weightand offer a more solid base when introducedto a less distance, than when it rests upon theordinary sharp, wrought-iron pointed shoe. 8071. 8072
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
