The band-wheel communicates motion to the walking-beam, while drilling is in progress, through the crank and a connectingrod known as the pitman; to the bull-wheels, while the tools are being raised, by the bull-rope; and to the sand-pump reel, by a friction pulley, while the sand-pump is being used.
The difference in level between the outcrop of the assumed eastern intake and of the wells is often so small, in comparison with their distance apart, that the friction would completely sop up the whole of the available hydrostatic head.
Eng., 1883) showed that when oil is supplied to a journal by means of an oil bath the coefficient of friction varies nearly inversely as the load on the bearing, thus making the product of the load on the bearing and the coefficient of friction a constant.
This smooth surface is then brilliantly polished by the aid of friction with a rubbing tool covered with a soft substance like leather or felt and fed with a polishing material, such as rouge.
In the case of the flywheel of a gyroscope if we neglect the friction at the bearings.
The effects of friction and viscosity in diminishing the velocity of running water were noticed in the Principia of Sir Isaac Newton, who threw much light upon several branches of hydromechanics.
Experiments on friction have been made by Coulomb, Samuel Vince, John Rennie, James Wood, D.
Stability of Friction in Earth.The grains of a mass of loosi earth are to be regarded as so many separate pieces abutting agains each other at joints in all possible positions, and depending for thei stability on friction.
Pulleys may be detachably connected to a shaft by friction clutches, so that they may be thrown in and out of engagement at will.
The constant -r is called the modulus of decay of the oscillations; if it is large compared with 2irfa the effect of friction on the period is of the second order of small quantities and may in general be ignored.