Abstract: In a chain sheave/chain-rope system wherein an end of a chain is connected to an end of a rope via a splice member, guide members are provided on the splice member for cooperation with guide members within a hawsehole that precedes the chain sheave. As a result of this cooperation, the splice member and the chain attached thereto are brought into the correct position for engagement prior to their entry onto the chain sheave.

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 wrecker for towing disabled automobiles and the like has attachment fittings on the rear bumper each for securing a scotch block chain and a snatch block to the bumper at the same location on the bumper. When an automobile is being winched into towing position, buckling forces exerted on the bumper by tension developed in the scotch block chains are counterbalanced by forces exerted on the bumper by tension developed in the winching cable which is passed around pulleys on the snatch blocks.

Abstract: A massive crane luffing jib is held and loaded under compression atop the main crane boom such as a hydraulically extensible and retractable telescopic boom whose sections may be locked for safety. The luffing jib is pivoted to an adapter atop the boom to enable swinging the jib to a stowed position close to and along the front side of the boom. First, second and third masts are pivotally attached to the jib base section. The second and third masts are connected by foldable tension links. An upper foldable ladder in the pendant line between the point of the jib and bridle assembly forms a hard connection between the first and second masts. A lower foldable ladder including a gooseneck forms a hard connection between the second and third masts following automatic coupling of the gooseneck with the third mast after the tension link becomes fully extended.

Abstract: A wireline guide for use in oil-well industry has three arms, each of which is made of parallel elongated trusses with support plates attached between the trusses. The first, lower arm is fixedly attached at 45.degree. angle to a collar of a pack-off assembly, the second arm is swivelly attached at its lower end at 45.degree. angle to the upper portion of the first arm, the second hand having a first pulley wheel rotatably mounted between the trusses at the upper portion of the second arm. A bumper is integrally mounted to the upper portion of the second arm in order to prevent contact between a travelling block and the wireline. The lowermost pair of support plates attached to the swivel arm are mounted at 45.degree. angle in relation to the trusses. A third, removable arm is mounted at its lower end between the angular support plates and extends vertically upwardly from the second arm. The uppermost reinforcing plates of the third arm are mounted at 45.degree.

Abstract: A pipe racking system is shown of the type having a vertical track, a lifting assembly adapted for vertical movement along the track, a horizontal beam for supporting the vertical track, and a movable carriage connecting the vertical track to the horizontal beam. The lifting assembly is supported by a wire rope running from the lifting assembly inside the vertical track and outside the carriage to a source of lifting power. A fixed guide sheave mounted in the carriage serves as a first point of contact for the wire rope running from the lifting head to the carriage. A rotatable guide sheave mounted in the carriage serves as a second point of contact for the wire rope. The rotatable guide sheave is rotatable by the wire rope in response to movement of the carriage, vertical track, and horizontal beam to center the wire rope in the guide wheel grooves of the guide sheaves during racking operations.

Abstract: A boom rack assembly pivotally mounted upon a wall or ceiling, warehouse stacker or the like, either a fixed or movable apparatus, for handling and positioning a cargo net or tie down over palletized cargo. The device includes a pair of vertically disposed, inverted J-shaped tubes complemented with rollers, pulleys or sprockets as an assembly, each having a counterweighted cable or chain extending therethrough with a hook harness hanging outwardly thereof. The tubes may be pivoted outwardly of the wall fixture such that the hooks may be pulled outwardly of the tubes and clasped to the cargo net or related tie down equipment. Upon release of the hooks, the counter-weights then lift the net, while the booms by retracting, vertically convey the net over the carbo, such that the net, when released from the device, may be secured conventionally at its edges to the cargo pallet.

Abstract: This invention relates to drilling rigs, and more particularly to novel apparatus for supporting a plurality of pairs of block and tackle systems with the tackle systems of each pair operable sequentially and alternately, the one being used to support a main drilling or tubing string while the other is being used to rack stands of tubing therefrom.

Abstract: Disclosed is a counter-balanced sheave assembly for supporting a cable comprising a plurality of sheaves mounted in an arcuate path on a support frame; counter-balancing weights positioned above the support frame and rigidly connected thereto; and a suspension arrangement, connected at the center of the assembly, for providing rotation of the assembly about two perpendicular axes of rotation, whereby the cable stays within a plane defined by the arcuate path.

Abstract: An implement side shift assembly is disclosed for laterally shifting an earth-working implement relative to a tractor or the like. The side shift assembly includes a frame assembly having laterally extending upper and lower slide rails. An implement support bracket mounts the implement to the slide rails for lateral movement. A slide plate is slidably mounted between the slide rails for lateral movement, and a piston-cylinder is connected between the frame assembly and slide plate to move the slide plate laterally. A latching mechanism mounted on the implement support bracket selectively connects the slide plate to the implement support bracket at one of a plurality of connecting points on the slide plate. One of the features of the invention resides in attaching lift cylinders to the side shift frame assembly at positions as far outboard as possible on the opposite ends of the frame assembly to reduce the bending and twisting moments on the frame induced by the implement.

Abstract: A two car carrier truck employs an above-cab tilting platform for the support of one car in transit. A cable winch is located at the rear of this platform with a guide sheave for the cable at the front of the platform assuring a proper fleet angle for the cable being wound onto the winch drum even when the car is in a fully loaded position. Proper layering of the cable on the winch drum is assured and dangerous uneven piling up of the cable is eliminated. The overall length of the transport truck is reduced, driver vision is improved, and car loading time is reduced by placement of the winch closer to the operator's control panel at the rear of the truck. Oil leakage from the winch blowing back onto the truck windshield is eliminated.

Abstract: A wire pulling device has a pulley wheel rotatably mounted to a clamp in the first embodiment of the invention, with the clamp being affixed to a junction box having an open side in a horizontal plane for the passage of the wire to the pulley wheel. In a second embodiment of the invention, two clamps are provided that mount the pulley wheel to the junction box where the open side of the junction box is in a vertical plane. The clamps have rotatable sleeves mounting a tie rod supporting the pulley wheel so that the sleeves may be rotated through 90 degrees when desired to change from the mode of operation of the first embodiment to that of the second, as when it is required when remounting the junction box from a ceiling to a wall.

Abstract: A retractable towing pin unit is provided for use on marine vessels as a guide for tow lines which extend overboard. The unit is designed to be installed in pairs on the deck of a marine vessel for centering the lines therebetween. The unit includes a pin mounted on a platform which is pivotable between a lower, inoperative position and an upper, operative position. An inflatable actuator device operable by pressurized air is mounted underneath the platform to raise and lower the pin between extended and retracted positions relative to the deck of the vessel. When not in use, the pin is safely retracted out of the way and flush with the deck.

Abstract: A support for boom end sheaves for lifting and/or handling machines, carrying at least a first sheave which receives a flexible rope, particularly a lifting cable, extending from the boom, is characterized in that it carries a pulley-block mounted on a lever which is swingingly carried by the support.

Abstract: In a machine having a boom, a sheave swivably mounted on the boom and a line reeved over and around the sheave, an assembly for returning the sheave to a predetermined position relative to the boom upon the sheave being rotatably displaced about its swivel axis by forces applied by the line, consisting of a righting arm operatively connected to the sheave for rotatable movement therewith about the swivel axis and means operatively engageable with the righting arm for rotatably biasing the righting arm and correspondingly the sheave about the swivel axis toward the predetermined position.

Abstract: A countered-balanced sheave having a bracket with an eye bolt for suspending the sheave, a pulley rotatably mounted on the bracket with weights mounted on the bracket on each side of the eye bolt, the sheave consisting of a pair of circular members secured together, each of the members having a slot at its periphery forming a cavity for receiving a ring insert.

Abstract: An apparatus for retaining guide pulleys for load cables of a building front cable lift in a housing stationarily arranged at the top of a building, from which housing said guide pulleys are outwardly pivotable from ground. In the housing which is open at its face there are supported two beams which are outwardly pivotable horizontally and carry the guide pulleys for the load cables. The beams are retained releasably by means of an interlocking device arranged in the interior of the housing. The interlocking device is releasable by means of auxiliary cables guided on the guide pulleys, said auxiliary cables depending from an edge cutout in the base of said housing.

Abstract: An improved cable guide assembly applicable to machinery, scientific instruments and prosthetic devices. When subjected to varying rotational and directional cable stress the assembly has the ability to automatically align itself so that cable stress is minimized. The assembly is particularly applicable to prosthetic devices and, in addition to extending cable life in such devices from six weeks or less to more than one year, the occasional changing of the cables is remarkably facilitated.