Abstract: A pulley for a wearable article includes a frame defining an aperture and a slot spaced apart from the aperture. A pulley wheel is disposed exterior to the frame, and a hub extends from the pulley wheel through the aperture. The hub engages the frame in a locked position, and is disengaged from the frame in an unlocked position. The hub is further from the slot in the locked than in the unlocked position. The hub and the pulley wheel are rotatable relative to the frame in the locked position. In another pulley, a frame defines an internal void and a slot extending through the frame and spaced apart from the internal void. A pulley wheel disposed exterior to the frame is spaced apart from the slot. A plurality of legs extends from the pulley wheel and is locked to the frame. The frame may include an anchor bar.

Abstract: Embodiments are directed toward a pulley. The pulley preferably has a fixed side plate, an operable side plate, a sheave, and a double-action lock. The operable side plate is preferably transitionable between a closed configuration and an open configuration. The sheave is preferably disposed between the fixed side plate and the operable side plate. The double-action lock is preferably transitionable from a locked configuration to an unlocked configuration upon completion of two separate and distinct actions. The lock in the locked configuration preferably prevents transition of the operable side plate from the closed configuration to the open configuration. The lock in the unlocked configuration preferably permits transition of the operable side plate from the closed configuration to the open configuration.

Abstract: A deflection unit for guiding and deflecting the support apparatus of an elevator system includes a deflection roller and an axle which is mounted on a carrier and on which the deflection roller is mounted and is freely rotatable. The axle has an axle head that axially secures the axle on one end. For torsion-free mounting of the axle, a securing member is bolted onto the carrier and supported on an anti-rotation safeguard section arranged on the axle head. A horseshoe-shaped retaining part as a retaining means for axially securing the axle on the carrier is mounted on the axle on the end opposite from the axle head. An annular securing member, which is connected by bolts to the retaining part, is used for securing the retaining part.

Abstract: A device, system and method are used for hoisting and lowering a load. The device has a front plate that may be displaced to reveal a sheave. The device also has a friction accessory. The friction accessory is arranged to create friction between a rope and the device when a load is suspended from the device using the rope and where the device is secured to a support structure. The system may be prepared by an operator, having ascended to an elevated location, and further allows the operator to lower the load from the elevated location prior to descending.

Abstract: Diverting pulley arrangement, more particularly a diverting pulley arrangement of an elevator, which arrangement includes an axle, at least one diverting pulley that rotates while supported on the axle, a faceplate structure, in relation to which and supported by which the diverting pulley is arranged to rotate on the first side of the faceplate structure, which axle is locked so that it does not rotate by the aid of a locking element that moves in relation to the faceplate structure, which locking element is on the second side of the faceplate structure. When it starts to rotate, the end of the axle forces the locking element to displace out of its position and to trip a safety switch.

Abstract: A wireline hay pulley has a support with front and back plates extending therefrom. A sheave disposed between the plates can rotate on an axle. The front plate is affixed to the support, while the back plate is removably connected to the support. The front plate has a round opening in which an eccentric bushing on the axle can rotate. When the back plate is disconnected from the support, the back plate can turn the axle fixed in a slotted opening. An eccentric bushing on the axle rotates in an opening of the front plate, thereby shifting the sheave away from the support. With the back plate moved away and the sheave shifted downward, an operator can readily rig up a wireline in the sheave's slot.

Abstract: A closure system and various exemplary embodiments for devices including the closure system are disclosed. The closure system may include a base, a sideplate configured to rotate with respect to the base, and a retaining mechanism carried by the sideplate and configured to pivot with respect to the sideplate substantially transverse to an axis of rotation of the sideplate. The retaining mechanism may be configured to engage with a engagement protrusion of the base to prevent rotation of the sideplate. A chest roller, a snatch block, an ascender including the closure system and a method of use of the closure system, are additionally disclosed.

Abstract: A starting block is used by a runner in a track event. The starting block contains a rail and a pair of foot pedal assemblies, one assembly connected to the left side of the rail and one assembly connected to the right side of the rail. Each foot pedal assembly contains a pad having a width of about five to twelve inches upon which the runner's foot is placed. Each pad contains markings along its width to enable the runner to place his feet at precisely the desired width.

Abstract: A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

Abstract: A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

Abstract: A high speed safety block assembly includes a first and second cheek plates with a sheave and axle installed between the cheek plates. The cheek plates each have a recessed area on their inner surfaces and have interlocking ears which increase the safety of the block assembly by preventing the block assembly from coming apart in the event of a screw failure. The sheave of the high speed safety block assembly includes a needle bearing which rolls on the bearing surface of the axle, permitting much higher loads and speeds when the high speed safety block assembly is used.

Abstract: A pulley comprises a pair of flanges, a rotary roller mounted on a first spindle, and a second flange which oscillates on the first spindle. A jammer is incorporated inside the pulley and comprises a pivotable tumbler on a second spindle between an active locking position and an inactive unlocking position of a rope. The second spindle is tubular and extends parallel to the first spindle, and includes an internal orifice disposed to come into alignment with a hole of the second flange when the second flange reaches a position near to a closed position, so as to enable a snap-hook to be attached through an orifice of the tumbler simultaneously resulting in locking of the second flange in the closed position.

Abstract: A block for line-handling comprises two cheeks and a rotatable sheave sandwiched between the two cheeks. The two cheeks mate together through a central aperture of the sheave by a relative rotation of the cheeks via a bayonet fitting. The mated cheeks are secured to each other by fixing pins, which also secure a swivel attachment member to the block. Bearing elements are used for rotatably supporting the sheave to prevent its translational movement relative to the cheeks.

Abstract: A sheave that has the advantage of being able to be quickly coupled to a le, and quickly decoupled from the cable. A further advantage is that the shaft of the pulley on which the cable rides is journaled at each end in side members that interlock when the sheave is in its closed position to support the shaft both from above the pulley, and from below. Other advantages include that the interlock is an arcuate T-shaped extension in the rotatable side member and a corresponding arcuate T-slot groove with which it engages in the stationary side member. The rotatable side member is affixed to the shaft of the pulley and is operable to rotate about the shaft from its closed and interlocked position to its open and disengaged position whereat the pulley is exposed such that the cable, cord or the like may be coupled or decoupled to the pulley.

Abstract: A pulley block assembly having a pulley block unit for an aerial line, comprising a pulley frame, a pulley rotatably supported by the pulley frame, and an inverting guide roller rotatably supported by the pulley frame opposite to the pulley in the pulley frame. The inverting guide roller has a peripheral helical groove in which the aerial line can be frictionally fitted.

Abstract: This concerns a snatch block for free stringing rope to a sheave supported between two side plates, one of which is movable. One of the side plates, called a swing plate, is rotatable with respect to the sheave. A removable bolt holds the two side plates together. Means are provided to prevent the bolt from falling completely out of the non-movable side plate when the other side plate is moved. Further, special means are provided for the bolt to help support the spool and further novel means are provided to aid in preventing the trunnion and hook from falling off the spool when the side plate is swung free.

Abstract: A load carrying device, movable along a rope, has a casing formed of two cheeks, a shaft supported on the casing, and a pulley supported on the shaft. Two diverters are disposed on opposite cheeks of the casing so a rope enters the device on one diverter, passes about a portion of the circumference of the pulley, and exits the device on the other diverter. The casing has a closed position where the cheeks are axially adjacent and an open position where the cheeks are spaced apart along the shaft so that a rope may be inserted in the device. The cheeks have stops which limit their translational movement from the closed position and limit their rotational movement when rope tension tends to move the diverters away from each other. Centrifugal force of pulley rotation causes a pawl to lock the pulley against rotation.

Abstract: In a military vehicle having a powered winch, the improvement comprising a able guide that includes three rollers having concave edge surfaces guidably engaged with segmental surface areas of the cable. One of the rollers is carried by an auxiliary frame that can be swung away from its normal position to thread or unthread the cable. The three rollers are equi-spaced around the cable guide space so that normal cable loads are borne by at least two of the rollers.