Chapter LIX: Section 66: Rope Gearing

=1199. ~V~-grooved pulley rim= for round rope.

=1200. Multiple pulley rim,= used for rope driving in mills, &c.

=1201. Single ~V~-grooved pulley= for hand ropes.

=1202. Pulley for wire rope= transmission, with wood bedding in the groove.

=1203, 1204, & 1205. Clip pulleys,= which grip the rope by its own tension.

=Ordinary round grooved pulley.= See Section 71, No. 1241.

=Rope grip pulley,= with snugs to wedge the rope and prevent slipping.
See Section 71, No. 1242.

=Pit head sheave.= Used for quick running wire ropes. The boss is
usually split to allow of expansion in cooling, and the arms are of
wrought iron. See Section 71, No. 1243.

=1206. Rope driving.=

=1207. Rope driving,= with tightening pulley and weight.

=1208. Rope grip pulleys,= for driving a vertical rope, the large pulley has a ~V~ groove into which the rope is pressed by the small pulley.

=1209. Jigger hoisting rope gear,= used for whip cranes, &c., instead of spur gearing.

=Wire rope transmission.= Endless wire ropes of small diameter are
used running over large pulleys and driven at a high speed (usually
3000 to 4000 feet per minute). This kind of power may be carried
considerable distances and over uneven ground, but it is not desirable
to have horizontal angles in the direction of the rope.