Abstract: A semi-automatic lacing machine used to lace a pair of blocks together to form a block and tackle assembly that will frequently be used in the manufacture of other products. The apparatus includes a structure for receiving a pair of blocks and a line therein, and structure including a first and a second guide, and a threader to advance the line through the first and second guides and thereby through the blocks received within the apparatus.

Abstract: A window sash support and movement lock assembly reciprocably disposed within an associated track element. The sash support and movement lock assembly includes a body with a center opening and guide surfaces on each end. A cam unit is received in the center opening and, upon cam rotation caused by tilting of an associated window sash, the guide surfaces are biased apart and into snug engagement with parts of the track element; one part of one of the guide surfaces also carries one or more pins which then engage an end wall of the track unit to provide a secure locking action.

Abstract: An improved window sash balance and components thereof. The balance includes a spring fixed with respect to the frame and a pair of pulley blocks, each containing one or more pulleys. One block is fixed with respect to the frame and the other is disposed on the end of the spring. A cord is secured to one pulley block and trained over the pulleys. The other end of the cord terminates in a hook adapted to be received in an opening in the window jamb channel. The pulley block unit includes a pulley-receiving frame, one, two or three pulleys received therein, and at least one axle for rotatably supporting the pulleys within the frame. The block has one or two pulley-receiving openings therein, and suitable openings for reception and positioning of the axle. The block includes first and second pairs of assembly reference surfaces forming a part of the block and spaced radially from the axle opening.