Abstract: A counterweight and an elevator car are suspended on a set of hoisting ropes. The elevator comprises one or more rope pulleys provided with rope grooves, one of said pulleys being a traction sheave driven by a drive machine and moving the set of hoisting ropes. At least one of the rope pulleys has against the hoisting rope a coating adhesively bonded to the rope pulley and containing the rope grooves, said coating having an elasticity that is greater in the edge portions of the rope groove than at the bottom of the rope groove. In a preferred solution, the traction sheave is a rope pulley like this.
Abstract: The invention relates to an elevator installation and a method for mounting a drive unit of an elevator installation. The elevator installation comprises a car and a counterweight in a shaft and a drive unit mounted on a crossbeam or the shaft roof. The drive unit has two spaced-apart drive zones. The drive zones are in that case integrally integrated in the drive shaft and directly machined therein.
Abstract: A rigid high load lightweight block (1) has unidirectional high strength moulded fibre bundles (4a, 4b) in the side plates (3a, 3b) for the carrying of the major operating tensile loads within the block (1), thereby minimising the weight and maximising the load of the assembly.
Abstract: A phenolic molding composition containing 40 to 100 parts by weight of inorganic fiber, 30 to 90 parts by weight of natural silica powder with a mean particle size of from 20 to 150 &mgr;m, and 1 to 15 parts by weight of a rubber component, as main components, in 100 parts by weight of resol-based phenolic resin. Preferably, the inorganic fiber contains 50% or more by weight of glass fiber. Further preferably, the natural silica powder is shaped like pulverized powder. A pulley is molded of a phenolic molding composition defined above.
Abstract: A clamping apparatus is provided with a shoe mountable on a work surface, and a clamp having a foot adapted for removable engagement with the shoe. Also provided is a method of clamping a workpiece in a fixed location with respect to a work surface including mounting a shoe on the work surface, providing a clamp with a foot and a clamping head, where the foot is adapted for removable engagement with the shoe, engaging the shoe and the foot, and clamping the workpiece between the clamping head and the work surface.
Abstract: A tension member for an elevator system has an aspect ratio of greater than one, where aspect ratio is defined as the ratio of tension member width w to thickness t (w/t). The increase in aspect ratio results in a reduction in the maximum rope pressure and an increased flexibility as compared to conventional elevator ropes. As a result, smaller sheaves may be used with this type of tension member. In a particular embodiment, the tension member includes a plurality of individual load carrying ropes encased within a common layer of coating. The coating layer separates the individual ropes and defines an engagement surface for engaging a traction sheave.
February 26, 1998
Date of Patent:
June 11, 2002
Otis Elevator Company
Pedro S. Baranda, Ary O. Mello, Hugh J. O'Donnell, Karl M. Prewo
Abstract: A traction elevator system includes a machine having a rotor including permanent magnets and a flat rope engaged with the machine. The flat rope includes one or more load-carrying members retained within a common sheath from a non-metallic material.
Abstract: A lightning resistant hydrological pulley comprising an insulator between a pulley body and an axle insert. The insulator is made of electrically non-conductive material, thereby denying lightning surges an electrical path from the pulley body to an axle disposed within the axle insert. Set screws angularly immobilize the pulley body relative to the insulator, and the insulator relative to the axle insert and relative to an axle disposed within the axle insert. In the preferred embodiment, the insulator is made of synthetic material such as white Delrin, and the pulley body and the axle insert are made of brass.
Abstract: A ratchet for use with a cord includes a pair of opposed tear drop shaped members defining a one piece housing for rotatably supporting a one piece ratchet spool, for supporting a pivotally mounted thumb release and for supporting an angularly displacable hook. Opposed circular cavities are disposed within the members to rotatably support corresponding bosses extending from opposed sides of the spool. A plurality of opposed interleaved non-radial ribs extend from opposed surfaces of the spool to frictionally grip a cord partially extending about the spool. A pair of wheels forming the spool are interlocked with and secured to one another through a key and keyway.
Abstract: Disclosed is a pulley that comprises a metal bearing with an elastomeric material on its outer rim molded into a polymeric wheel, where the coefficient of thermal expansion of the polymeric wheel is at least 1.0.times.10.sup.-6 cm/cm/.degree.C. greater than the coefficient of thermal expansion of the metal bearing. The pulley is made by applying an elastomeric material to the outer edge of the metal bearing and molding the polymeric wheel around it. The use of the elastomeric material prevents slippage between the metal bearing and the polymeric wheel.
Abstract: A ratchet for use with a cord includes a pair of opposed tear drop shaped members defining a one piece housing for rotatably supporting a one piece ratchet spool, a pivotally mounting a thumb release and supporting an angularly displacable hook. Circular cavities are disposed within the members to rotatably support corresponding bosses extending from opposed sides of the spool. A plurality of studs, one of which provides support for the hook, extend from one member into corresponding cavities of the other member and are sonically welded or otherwise permanently fixed therein. A steel pin, having opposed ends inserted into cavities in the opposed members, mounts the thumb release and an associated spring.
Abstract: A structural element made of a castable or extrudable polymeric material reinforced by fillers, said structural element having a contact surface in sliding engagement with another element, the structural element being provided on its contact surface with a layer, thin in comparison to the structural element's dimensions, of polymeric material free of fillers, the said layer being unitary with the structural element.
Abstract: A transport system (10) for transporting a litter carrier (40) from one location onboard a first ship to a second location onboard another ship includes a retractable boom (12) having a stationary member (16) and a telescoping member (18) slidably engaged therein. Boom (12) also includes a hoist unit (28) which is operatively connected through a hoist cable (34) to carrier (40) to cause movement thereof. Carrier (40) includes acoustic rangefinders (50) and contact detectors (52) which are electrically coupled to a control circuit (60) located onboard one of the vessels through internal electrical conductors in hoist cable (34). Rangefinders (50) generate signals indicative of the distance between carrier (40) and a selected one of the ships. Contact detectors (52) provide signals which indicate whether carrier (40) is in transit or has landed onto a ship.
Abstract: A main rope is wound round a sheave and a deflector wheel by three turns, and the sectional shape of those rope grooves of the sheave with which the main rope is held in engagement is formed in the shape of circular arcs, whereby the lifetimes of the main rope and the sheave are lengthened, and an enhanced traction ability is attained. Among the grooves of the driving sheave around which the main rope is wound, those except the grooves around which the main rope is wound first and last are shaped so as to afford greater friction at contact therebetween than the frictional contact of the first and last grooves, or the grooves around which the main rope is wound first and last are rendered higher in hardness than the other grooves, whereby the amounts of wear of the respective grooves are equalized to extend the lifetimes of the rope and the sheave and to prevent the pleasant ride of an elevator from worsening.
Abstract: Interposed between the driving shaft of the tackle and the hoisting hook of the tackle is a flat textile strap or a flat metal braid. The strap or braid is attached to the drum of a drum-pulley keyed on the driving shaft at the end of the strap or braid. The strap passes around the pulleys of a pulley-block comprising an upper block mounted on the frame of the tackle to pivot about a horizontal axis X-X, and a lower block suspended from the strap or braid and carrying the hook.
Abstract: A floating power transmission ring gear whose inner periphery is supported through its gear mesh with a pinion and whose outer periphery is engaged with a belt, to increase the belt's bending diameter without a corresponding increase in the belt's travel per pinion's revolution.