Abstract: Roller unit for laying cables (11, 12, 13), comprising a frame (23, 23?) where at least one pair of sliders (25, 25?) are positioned aligned parallel to a laying direction (S1, S2) of the cables (11, 12, 13) and each provided with at least one pair of wheels (28, 28a, 28b) supporting a cable (11, 12, 13) to be laid; said sliders (25, 25?) are hinged to said frame (23, 23?) and rotatable around respective axes of rotation (A, A?) so as to vary the inclination thereof with respect to said frame (23, 23?) and therefore to vary the radius of curvature of the cable (11, 12, 13) supported; said wheels (28, 28a, 28b) are provided with an annular groove (32) to support the cables, delimited by containing wings (33) and able to define a contact and sliding surface of at least one of said cables (11, 12, 13), wherein at least said annular support groove (32) is made of or covered by a technoplastic material with polyamide (PA) base reinforced with glass fiber, if the supported cable is a conductor (11, 13), or by means

Abstract: A sheave may include a body portion with a circular circumference and defining a center plane, a bore extending through the body portion and configured for receiving a shaft and allowing the body portion to rotate in the center plane, and a rope groove arranged on the circular circumference including a radiused bottom with a first end and a second end and a pair of opposing sidewalls each extending directly and tangentially from one of the first and second end and having a curved profile.

Abstract: A drive disk with rim segments which are located at a distance from each other and are embodied in the form of segments of the groove track which are made from the same or different material and high-powered magnets are introduced in between the grooves in the drive disk rim and the cable along the peripheral line of the drive disk rim. Foamed steel or fiber composite ceramics or similar, respectively with increased friction values, are used as materials for the rim segments.

Abstract: A bull-wheel for a rope transport installation comprises a hub and a peripheral rim joined to the hub by a metal connecting framework composed of a perforated central disk strengthened by rigidifying arms. The rim is radially subdivided into several circular segments assembled to one another by first fixing members. The hub is fixedly secured to a support enclosure comprising at least one coaxial plate of polygonal cross-section confining at the ends bearing surfaces for the central disk and the radial rigidifying arms assembled by second fixing members. The assembly is arranged so as to distribute the radial forces in the axis of the rope uniformly regardless of the angular position of the bull-wheel when the latter is driven in rotation.

Abstract: A transmission system includes: first and second transmission members to be selectively coupled to each other or decoupled from each other. The first transmission member includes at least one gripping device having a plurality of spaced gripping elements, and the said second transmission member includes a plurality of coupling elements receivable in an interleaved manner between the gripping elements of the gripping device. The gripping elements of the gripping device being displaceable by a lateral compressive force (a) to displace them towards each other to firmly grip the coupling elements of the second transmission member and thereby to establish a non-slip coupling between the two transmission members; and (b) away from each other to decouple the two transmission members from each other.

Abstract: An oil skimmer for removing oil floating on surfaces of bodies of water. The oil skimmer includes a support frame, respective drive pulley and guide pulleys rotatably mounted to the support frame on respective shafts, and a drive train which rotatively drives the drive pulley and guide pulleys. A skimmer hose in the form of a loop to which oil adhere floats on the body of water and is driven by the drive pulley through the guide pulley onto and off the surface of the body of water carrying adhered oil. A skimmer hose scraper disposed between the drive and guide pulleys removes the oil from the skimmer hose into a collection receptacle. The drive and guide pulleys comprise replaceable, quick changing inner and outer pulley halves that sandwich respective central hubs therebetween to space the pulley halves to fit skimmer hoses of different cross-sectional sizes. The central hubs with attached drive and guide pulley halves are affixed to the drive shafts using a quick release nut which threads to the shafts.

Abstract: A pulley consists of a pulley basic body which has a cylindrical outer circumferential surface. Sitting on this cylindrical outer circumferential surface is a tire which is of sandwich-like design with regard to its radial extent. This results in a plurality of rings concentric to one another. The ring which is furthest on the inside in the radial direction and the ring which is furthest on the outside in the radial direction are in each case elastomeric rings, whereas a reinforcing ring is located between them. The elastomeric outer ring is harder than the elastomeric inner ring, so that a very abrasion-resistant surface is achieved, over which the rope runs, whereas the elastomeric inner ring provides for adequate resilience. The reinforcing ring is provided in order to distribute the rope load as uniformly as possible over the elastomeric inner ring.

Abstract: In an elevator drive sheave, positioning of divided segments in a circumferential direction relative to a sheave body and transmission of torque between the sheave body and the divided segments are performed by a torque transmission mechanism having a plurality of keys interposed between the sheave body and the divided segments. A projecting portion projecting radially inward is disposed on an axial end portion of the divided segments, a contact surface being disposed on the projecting portions. Positioning of the divided segments in an axial direction relative to the sheave body is performed by the contact surface being placed in contact with an axial end surface of the sheave body.

Abstract: In an elevator drive sheave, positioning of divided segments in a circumferential direction relative to a sheave body and transmission of torque between the sheave body and the divided segments are performed by a torque transmission mechanism having a plurality of keys interposed between the sheave body and the divided segments. A projecting portion projecting radially inward is disposed on an axial end portion of the divided segments, a contact surface being disposed on the projecting portions. Positioning of the divided segments in an axial direction relative to the sheave body is performed by the contact surface being placed in contact with an axial end surface of the sheave body.

Abstract: A magnetic-tape-cassette apparatus provides a pulley (1, 21, 22) for a belt drive, particularly to a flywheel for a deck of the magnetic-tape-cassette apparatus. The pulley has a groove (10) at its circumferential edge (6, 7), in which groove a drive belt (11, 27) is engageable to drive the pulley. In order to manufacture such a pulley simply and cheaply, the pulley comprises a central disc (2) and a first (3) and a second (4) end disc. The first and the second end disc are shaped along their circumferences in such a manner that they form the groove in which the drive belt is engageable.

Abstract: A pulley comprises a hub with spokes arranged radially about its circumference. Secured on the spokes is a rim with a rim base accommodating lining inserts having holes wherethrough a flexible link extends to embrace the rim base. At the outside of the pulley each insert has a groove terminating in the hole. The width of the groove is such as to ensure removal of the flexible link from the hole therethrough. Provided at end faces of the inserts concentrically with the holes are recesses receiving ends of precompressed resilient elements disposed between the inserts.

Abstract: A sheave assembly for use with rope or cable. The sheave assembly includes a sheave having a hub adapted to be rotatably mounted about an axis. An annular rim is coaxially supported by the hub. The sheave further includes side flange walls adjacent the rim, defining an annular sheave groove between inner facing surfaces of the side flange walls.The sheave assembly also includes a plurality of arcuate inserts mounted within the sheave groove in end to end relation around the rim. Outer side wall surfaces of the inserts are disposed in adjoining relationship with the inner wall surfaces of the sheave side flange walls. The arcuate inserts further include a center groove formed therein upon which a cable or rope bears.Detachable perimeter bands extend around outer edge portions of each sheave side flange wall and adjacent portions of the inserts. These bands serve to detachably secure the arcuate inserts within the sheave groove.

Abstract: A pulley device having a V-groove is formed by friction welding a pair of stamped steel plates together. A metal plate having a melting temperature lower than the steel plates is placed between the plates to melt-bond therewith by friction welding.