Abstract: A portable trailer supports a long horizontal tube on which is mounted a rotatable and reciprocable drum and a fixed storage reel. The center tube, reel, and drum contain alignable longitudinally extending radial slots therethrough. Attached to the drum and extending over the reel is a bail and a series of snatch blocks. A slack cable is inserted transversely through the aligned slots in the drum, center tube, and reel such that it lays in the interior of the center tube. The cable is looped inside the reel and then transversely inserted into the bail and snatch blocks. Rotating and reciprocating the drum neatly winds the cable onto the storage reel from a supply reel, although there is no access to the cable ends.

Abstract: A power driven wire twister is suitable for twisting relatively heavy multi-strand wires. The strands are twisted by means of a chain and sprocket drive. The wire twister housing and output sprocket are suitably slotted to allow placement of the wire at the axis of rotation of the twisting sprocket. A tooth carried by the output sprocket separates the strands of the wire into two approximately equal groups prior to twisting. A large angle of contact between the chain and slotted output sprocket insures that a sufficient number of sprocket teeth are always in mesh with the chain for heavy duty continuous operation.

Abstract: A lift with a work platform supported by a scissors linkage on a base includes a single hydraulic cylinder for elevating the linkage. The cylinder is connected between a lower link and a swing arm which is pivotally connected to the linkage. During a first lifting stage the swing arm bears against a cam surface on the uppermost link to cause an initial unfolding action of the upper links. Prior to the arm leaving the cam surface, the arm bears against an abutment on one of the lower links for a second lifting stage to cause unfolding of the linkage from the bottom. This arrangement provides a strong, smooth unfolding of the linkage. The base is provided with outriggers which can be folded against the sides of the base when not in use and which are pivoted to a transverse position for use. Links connecting the outriggers to a guide track enable positive locking of the outriggers in the operative position.

Abstract: A lift with a work platform supported by a scissors linkage on a base includes a single hydraulic cylinder for elevating the linkage. The cylinder is connected between a lower link and a swing arm which is pivotally connected to the linkage. During a first lifting stage the swing arm bears against a cam surface on the uppermost link to cause an initial unfolding action of the upper links. Prior to the arm leaving the cam surface, the arm bears against an abutment on one of the lower links for a second lifting stage to cause unfolding of the linkage from the bottom. This arrangement provides a strong, smooth unfolding of the linkage. The base is provided with outriggers which can be folded against the sides of the base when not in use and which are pivoted to a transverse position for use. Links connecting the outriggers to a guide track enable positive locking of the outriggers in the operative position.

Abstract: A portable trailer supports a long horizontal tube on which is mounted a rotatable and reciprocable drum and a fixed storage reel. The center tube, reel, and drum contain alignable longitudinally extending radial slots therethrough. Attached to the drum and extending over the reel is a bail and a series of snatch blocks. A slack cable is inserted transversely through the aligned slots in the drum, center tube, and reel such that it lays in the interior of the center tube. The cable is looped inside the reel and then transversely inserted into the bail and snatch blocks. Rotating and reciprocating the drum neatly winds the cable onto the storage reel from a supply reel, although there is no access to the cable ends.