Abstract: There is disclosed a hoist adapted to be mounted on a conventional sectional scaffold structure in which the hoist apparatus consists of a boom assembly to be mounted near the top of a scaffold structure and a winch assembly to be mounted near the bottom of such structure. The winch assembly includes a cable drum and a cable, a worm gear drive for the drum and a two-speed pulley drive from the motor to the worm gear. The cable runs upwardly in proximity to a column of the scaffold structure and through a short hollow vertical mast section on top of which is mounted a rotatable boom having a pair of pulleys to guide the cable out of the top of the mast section to the end of the boom and downwardly to receive a load. The mast section supporting the boom may be only about six feet long and is removably attached to a column of the scaffold structure so that the scaffold structure effectively supplies the mast for the boom of the hoist.

Abstract: Method by which slubs are formed from random individual filaments in a continuous filament yarn bundle. A yarn bundle is fed under drafting tension to and through a first fluid jet device in which cocurrent and countercurrent fluid flows therethrough and which along with the drafting tension serves to break some of the individual filaments of the yarn bundle at random intervals along the length of the yarn bundle. The drafting tension also serves to prevent the broken filaments from completely entangling with the yarn bundle. The yarn bundle then passes through a second fluid jet device having cocurrent and countercurrent fluid flows therethrough, the flows adjusted to cause the broken filaments to slide along the yarn bundle and to become entangled with the other filaments and to form slubs.