Abstract: The invention relates to a crusher (10), in particular a rock crusher, having a crusher unit (40), to which a band conveyor unit (60) having an endlessly circulating band conveyor is indirectly or directly assigned, wherein a magnetic separator (70) having a magnet (79) is held in the area of the band conveyor unit (60) above the band conveyor in the direction opposite from the direction of gravity, and wherein an adjustment unit (80) is provided, which can be used to change the height of the magnet (79) above the band conveyor. To enable the reliable operation of such a crusher, it is provided according to the invention that the magnetic separator (70) is suspended from at least two limp ties (81, 82, 84, 85), and that the limp ties (81, 82, 84, 85) can be adjusted by means of at least one actuator unit (90) to change the height of the magnet (79).

Abstract: There is provided a weight bearing device for being located overhead to support the weight of a load applied to the device in use. Embodiments comprise a reel for winding up or unwinding a support belt for supporting the load, the reel being rotatable about a first axis of rotation. An actuator element is provided for being driven about a second axis of rotation to drive a locking mechanism to lock the reel against unwinding of the support belt when the weight of the load is applied to the support belt. The reel is released by the locking mechanism when the weight of the load is removed from the support belt. Methods for use of the device are also provided.

Abstract: A constant tension tether management system for tethered aircraft includes a ground station for operatively coupling to an unmanned aerial vehicle. The ground station includes a spool rotatably disposed within the ground station and adapted to support a tether thereon. A first pulley is rotatably mounted within the ground station along a tether travel path. A second pulley is rotatably disposed within the ground station and moves in translation along the tether travel path. The first pulley is disposed along the tether travel path between the spool and the second pulley.

Abstract: A chain block including: a gear unit including a pinion gear, and a load gear configured to rotate integrally with a load sheave member; a case body configured to house the gear unit and to be supplied with grease being semifluid or semisolid at a working temperature as a lubricant; and a built-in cover arranged inside the case body, wherein: the built-in cover includes a first peripheral wall part configured to cover an outer peripheral side of the pinion gear, and a second peripheral wall part provided to be larger in diameter than the first peripheral wall part, the first driven gear body including a first large-diameter driven gear meshing with the pinion gear; and the built-in cover is provided in a circulation shape without a break by continuation of the first peripheral wall part and the second peripheral wall part.

Abstract: The invention describes a winch for nautical use or for devices for lifting and lowering on a rope, comprising a fixed stator body and a rotor body fixedly connected to the stator body. The rotor body is able to rotate around a longitudinal axis to wind a rope on its outer surface. The winch is provided with a self-tailing device in turn comprising two half-pulleys, a lower half-pulley and an upper half-pulley, mounted opposite one another and coaxial to the rotor body. The two half-pulleys, at the upper portion of the outer surface of the rotor body, define a circumferential throat intended to at least partially house a winding of the rope. One half-pulley is fixed with respect to the rotor body and the other half-pulley is moveable parallel to the longitudinal axis to vary the dimensions of the circumferential throat.

Abstract: The invention describes a winch (1) for nautical use or for devices for lifting and lowering on a rope, comprising a fixed stator body (2) and a rotor body (3) fixedly connected to the stator body. The rotor body is able to rotate around a longitudinal axis(a-1) to wind a rope on its outer surface. The winch is provided with a self-tailing device (6) in turn comprising two half-pulleys (61, 62), a lower half-pulley (61) and an upper half-pulley (62), mounted opposite one another and coaxial to the rotor body. The two half-pulleys, at the upper portion of the outer surface of the rotor body, define a circumferential throat (63) intended to at least partially house a winding of the rope. One half-pulley is fixed with respect to the rotor body and the other half-pulley is moveable parallel to the longitudinal axis to vary the dimensions of the circumferential throat.

Abstract: The present invention relates to a hoisting winch, in particular to a hoisting gear winch, having a hoisting drum whose winding region is bounded by two lateral flanged wheels, wherein at least one further flanged wheel is provided between the lateral flanged wheels for dividing the winding region into at least two part winding regions, wherein the cable can be guided beyond the named further flanged wheel into the at least two part winding regions. It is suggested in accordance with the invention to move the hoisting drum and/or a transverse cable guide arranged in front of the hoisting drum transversely to the longitudinal direction of the running in/running off cable approximately in the longitudinal direction of the drum and/or to adjust the angular position of the hoisting drum transversely to the longitudinal direction of the drum with respect to at least one transverse axis.

Abstract: A winch apparatus (10) comprises first and second drum assemblies (12, 14) each defining a discontinuous drum contact surface for engaging a common spoolable medium (50), wherein the first and second drum assemblies (12, 14) are configured to rotate about respective first and second axes of rotation (24, 26) which are inclined relative to each other. In one disclosed embodiment the drum assemblies (12, 14) are intermeshed in a general axial direction.

Abstract: A device for lifting an article comprises a housing having a leading edge region in fluid communication with an inner chamber. The leading edge region is arranged to engage a region between an article and a support surface beneath the article. An elongate tubular member, closed at one end, and at the other end, in fluid communication with the leading edge region and the inner chamber. The housing is arranged to provide a retracted position in which the elongate tubular member is held relative to the leading edge region and responsive to an operative pressure within the inner chamber so as to unfurl beyond the leading edge region where the elongate tubular member migrates along the access region toward a deployed position in which the tubular member extends a distance such that opposed ends of the tubular member may be used in lifting the article from the support surface.

Abstract: A modular lift assembly includes a frame, at least one head block connected to the frame, a drum rotatably connected to the frame about an axis of rotation and having at least one winding section, and a drive mechanism operatively connected to the drum for rotating the drum. In various examples, the lift assembly includes at least one loft block internal or external relative to the frame. The loft block is configured to guide a cable from the at least one head block to a load. The lift assembly can further include a load brake positioned along the axis of drum rotation to reduce risks associated with a drive or motor failure.

Abstract: A load balancing hoist constructed to combine the power module and the travel module of the hoist into a single unit to substantially reduce the cost and the length of the hoist without effecting its operation and application.

Abstract: An apparatus which enables the user to transition the location of a load contained within vessels or cavities which are accessed by means of a manhole, manway, or other similar openings which provides for limiting peripheral interference, the establishment of a high center point in both horizontal and vertical applications, and limiting the weight and bulk of such an apparatus.

Abstract: A cable winch hoisting device for theatrical stages, whereby a plurality of elongated, rod-like holding girders are suspended on cables, and these holding girders are adjustable in height by varying the free cable length between the cable suspension and the holding girder, which determines the position of the respective holding girder. The holding girders are adjustable in height between two end positions without any mutual interference in the clearance spaces which do not overlap with one another and are provided for the holding girders. At least two cables which are uniformly adjustable by the same cable-operating device act on the holding girders and are distributed over the length of the girders. The cable-operating devices are each electrically driven cable drums. The cables acting on the same holding girder can be wound up side by side onto the cable drum of the respective cable-operating device with the same change in free cable length, which determines the position of the holding girder.

Abstract: A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up maintains a predetermined fleet angle between a take off point from the drum and the head block.

Abstract: A field-effect transistor structure wherein a single patterned thin film semiconductor layer: is monocrystalline, and epitaxially matched to and dielectrically isolated from an underlying body region, in channel locations; and is polycrystalline in source/drain locations which abut said channel locations.

Abstract: A hoist system including a roller assembly which is allowed to pivot as a suspending member is rolled up around a drum compensates for lateral forces and allows a load on the suspending member to remain centered under the roller assembly. The drum has a shaft mounted through the center with a resilient coupling between the shaft and the drum which allows transfer of rotational torque while allowing the drum to pivot. Such a coupling can be furnished by a pair of concentric rings around the shaft having pivot holes orthogonal to the shaft axis. The innermost ring is connected by a pair of pivot pins to the shaft. The outermost ring is connected to the innermost ring by another pair of pivot pins perpendicular to the pivot pins through the shaft. The outermost ring is attached to the inside of the drum.

Abstract: In a theatrical rigging system, a number of motors can be placed on platforms which can move upon rails to be connected to different theatrical rigging elements. The motors can be randomly attached to operate different overhead hanging devices.

Abstract: An improved apparatus and method for injecting and retrieving a length of coiled tubing and storing the tubing on a storage spool. An injector reel is pivotally mounted on a frame such that coiled tubing may be angularly injected to shallow, horizontal wells. A hold-down assembly is provided to individually adjust the pressure applied to the coiled tubing as it is injected into or retrieved from a well. The positioning of the injector reel and the storage spool in the injecting mode ensures a greater degree of wrapping of the coiled tubing around the injector reel to improve the control of the injection and retraction of the tubing. A vertically and horizontally adjustable storage spool cradle enables the operator to vary the width and diameter of the storage spools used in the apparatus.

Abstract: A monopod anchoring device for facilitating the entry or removal of a workman or equipment into a cavity. The device is adapted to engage an eyelet or the like that extends from a support structure located above the cavity and includes a head member and a leg member extending downwardly therefrom. Secured to one side of the head member is a pulley assembly. A safety device is secured to the leg member and includes a housing with a drum and a drum shaft mounted therein and a safety line that is adapted to be wrapped around the drum. The safety line is positioned over the pulley assembly and has one end secured to the drum and another end secured to the object to be raised or lowered. A hook extends upwardly from the head member in order to secure the monopod anchoring device to the eyelet. Secured to the end of the leg member distal the hook is a transverse cross member which has a pair of feet extending downwardly therefrom for frictionally engaging a support surface.

Abstract: A combination of air balancing hoists is described in which two or more hoists are connected end to end each with a load cable connected at spaced locations on the load item to enable raising a bulky load item. Force transmission rods axially interengage axially moving components of the connected hoists to insure that the cables are raised and lowered together to maintain the attitude of the load item as it is raised or lowered.

Abstract: A cable drive mechanism wherein a cable member comprising a plurality of individual cables disposed in side by side relation to form a flat member is successively wrapped around at least one cable wheel in one rotational direction and around at least one tension wheel in an opposite rotational direction, the tension wheel being mounted on pivot arms and connected to drive motors such that rotation of the tension wheel induces an angular moment in the pivot arms to urge the tension wheel toward the cable wheel in order to provide gripping friction on the cable member between the cable wheel and the tension wheel sufficient to overcome the inertia of the cable during start-up.

Abstract: This invention generally relates to a cable recovery device for use on bo a surface ship. The invention compensates for excessive tensions arising in cables carrying submerged loads which are caused by the swell of the ocean acting on the ship, and controls the tension at which the cable is wound. The invention includes a cable winding drum which is rotationally driven by a variable-speed motor, a loop-shaped cable passageway which circumscribes the drum which forms a loop of cable of varying length, and a means for sensing the length of said cable loop and for automatically controlling the speed of the variable speed motor in response thereto. The loop of cable of varying length compensates for excessive cable tensions resulting from the swell of the ship, and allows the cable to be wound around the drum at a desired uniform tension.

Abstract: This invention relates to a device for handling a submerged load from a s. The submerged load is held by a cable which is attached to a cable recovery drum mounted in an anti-rolling cradle located on a turret affixed to the ship's surface. The device includes a straight beam which carries an appliance for straight-line haulage, for example, pairs of wheels equipped with resilient tires, the device being hinged about a transverse axis.

Abstract: A battens system for raising and lowering sceneries or similar loads on a stage is disclosed. The system comprises a series of support members adapted to be secured to the joists of a ceiling, an elongated winch drum made up of several sections interconnected by universal joints and supported in horizontal position by said support members, each winch drum section being provided over part of its length with a helical groove on which a cable for supporting the load is wound. Each support member carries bearing wheels engaging the helical grooves for rotatably supporting the winch drum and for causing its axial displacement at each turn by a distance equal to the pitch of the cable wound or unwound from the winch drum, such that the load will not be laterally shifted when being raised or lowered. The shaft of a reversible hydraulic motor is secured to an end of the winch drum, whereby the hydraulic motor moves with the winch drum in its axial movement.

Abstract: An improved airborne hoist for use in lifting a load, particularly by means f a helicopter, comprising a pair of rotatable drums, each drum being rotatable in an opposite direction, a drive unit intergeared through a series of shafts for providing rotation to the drums, a cable holding device, in the configuration of a supplemental drum surrounding each of the first said drums, and each cable holding device provided for rotating simultaneously in unison with the rotation of its respective drum, while at the same time being axially shiftable for providing a winding or unwinding of its held cable from a constant location. The pair of drums each hold, respectively, its own cable, thereby providing a pair of cables that furnishes an inherent safety factor in that a single mechanical failure of a drum does not result in a loss of its held load.