Hoisting ropes are weakened by deterioration and breakage of the wires, due to corrosion and repeated bending.
A ratio of 48 to is the minimum allowable; better 60 to 75 to 1, and for highly tempered steel ropes ratios of 150 to i or more are desirable.
When closed by the load the width is sufficient to allow it to enter a funnel-shaped guide on a cross-bar of the frame some distance above the bank level, but on reaching the narrower portion of the guide at the top the plates are forced apart which releases the ropes and brings the lugs into contact with the top of the cross-bar which secures the cage from falling.
With a grating rush, the three lines flew round the loggerheads with such a force as to gouge deep grooves in them; while so fearful were the harpooneers that this rapid sounding would soon exhaust the lines, that using all their dexterous might, they caught repeated smoking turns with the rope to hold on; till at last--owing to the perpendicular strain from the lead-lined chocks of the boats, whence the three ropes went straight down into the blue--the gunwales of the bows were almost even with the water, while the three sterns tilted high in the air.
We all heard a faint creaking, as of ropes and yards hitherto muffled by the storm.
The wagons escorted by the hussars drew up to the picket ropes and a crowd of hussars surrounded them.
The arrangements for this purpose vary, of course, with the amount of work to be done with one fixing of the machinery; where it is likely to be used for a considerable time, the drum and brake are solidly constructed, and the ropes of steel or iron wire carefully guided over friction rollers, placed at intervals between the rails to prevent them from chafing and wearing out on the ground.
Carrying the grooved sheaves over 'which the hoisting ropes pass, is known as the head-gear (fig.
From the widespreading roots string and ropes are manufactured in Lapland and Bothnia: the longer ones which run near the surface are selected, split through, and then boiled for some hours in a ley of wood-ashes and salt, which, dissolving out the resin, loosens the fibres and renders them easily separable, and ready for twisting into cordage.
Say he were pinioned even; knotted all over with ropes and hawsers; chained down to ring-bolts on this cabin floor; he would be more hideous than a caged tiger, then.