Abstract: The invention relates to a hook block base body for fastening to a pulley set of a hoisting apparatus having a plurality of deflection pulleys comprising a means for installing the hook block base body at the pulley set and a load suspension means for suspending a load, characterized by at least one projection element that is configured to cooperate with a deflection pulley on an installation of the hook block base body at the pulley set and only to permit an installation of the hook block base body at the pulley set when the deflection pulley cooperating with the projection element is rope-free.

Abstract: A process, mechanical method, and mechanical utility invention that creates an expandable sustainable member beam with utility in its' substantially different shape, mobility, multi-functional capabilities, and sustainability from its' conventional counter part. It can be utilized independently, as a utility stand, in plurality, sharing a base(s) and platform(s), as a step, or in conjunction with other expandable sustainable member beams from which to build. Some embodiments may replace a conventional wood or metal 2?×4?×8? stud in many applications. Additional utilities include, but not limited to: a post, concrete form, assistive device for mobility challenged individuals, independent balance, self-leveling, varying angular degree manipulation, elevational deployment and retraction capabilities. It can be substantially shortened for transport and deploy to varying longitudinal values to regain its utility upon user demand.

Abstract: An improved crown pulley assembly attached to an upper end of a vertical drilling rig derrick mast used in conjunction with an improved top drive assembly which is used within the drilling rig derrick for the drilling of a well, the improved crown pulley assembly having a crown frame supporting a plurality of pulleys with the top drive providing two sets of paired top drive pulleys, the pulleys suspending a single drive cable through the plurality of pulleys with an anchor end of the single drive cable affixed below the derrick and the winch end of the cable attached to a winch to raise and lower the improved top drive assembly within the drilling rig derrick.

Abstract: A cable guiding device includes a base, upper and lower guide members disposed along a longitudinal direction, in which two ends of the upper guide member are mounted on the base and two ends of the lower guide member are mounted on the base. A slider defining a central cavity is penetrated therethrough in a lateral direction substantially perpendicular to the longitudinal direction. Upper and lower movable members are fitted slidably over the upper and lower guide members respectively, in which two ends of the upper movable member are mounted on two longitudinal side walls of the slider, and two ends of the lower movable member are mounted on two longitudinal side walls of the slider respectively. Upper and lower guiding rollers are fitted rotatably over the upper and lower movable members and disposed within the central cavity respectively.

Abstract: A descaler is provided for descaling the scale on hot finished wire or green rod. The descaler comprises two rollers that are mounted to a rotatable support plate. The support plate and the rollers rotate in unison. One of the rollers pivots relative to the support plate such that the rollers can be positioned substantially parallel to allow wire to be easily fed between the rollers for set up purposes and can be positioned substantially perpendicular in which the rollers are arranged to effect wire descaling when wire is pulled through the descaler. Rotation of the roller support plate from the initial set up position automatically pivots the one roller into the working position. The pivoting movement of the one roller is accomplished using the tension of the wire that is created as the roller support plate is rotated and/or a cam mechanism.

Abstract: The present invention provides an improved grapnel which permits towed ars to be retrieved more easily and with less chance of damaging the array. The invention includes a pair of U-shaped members attached to a center stock, the U-shaped members being attached in a perpendicular relationship to each other. A threaded rod connects each vertical portion of the U-shaped members to the center stock, and each row has a roller disposed thereon. The grapnel further includes a hub disposed on the center stock proximate the rollers and ramps respectively attached to each vertical portion of the U-shaped members, for guiding a towed array into engagement with the rollers.

Abstract: An apparatus for selectively raising, storing, and lowering a recreational water craft that includes a first cable. The first cable is attached at one end to a winch for selectively shortening or lengthening the first cable. The first cable is attached at the other end to a ring and the first cable passes through a first pulley. A proximal strap is releasably and adjustably attached to the boat and is connected to a second cable. The second cable is connected at one end to the proximal strap and at the other end to the ring. A distal strap is releasably and adjustably attached to the boat. The distal strap is connected to a third cable, with the third cable being attached at one end to the distal strap and at the other end to a size adjustment assembly. The size adjustment assembly is connected to the ring.

Abstract: An apparatus for guiding elongated items, such as cables, wires, hoses, and the like, onto or from spools. The apparatus includes two frame members that are pivotally and hand-releasably connected together to form an enclosed frame through which the elongated items are guided. A first pivotal and hand releasable connection is made between a first leg of the first frame member and a first leg of the second frame member. A second pivotal and hand-releasable connection is made between second legs of the frame members to provide a releasable opening of the enclosed frame. The releasable opening provides access to the enclosed frame for installation of the elongated item without requiring access to one of the ends of the elongated item to thread it through the enclosed frame. One of the frame members also includes provision for attachment to a mount, by which the enclosed frame is held in any of a plurality of selectable positions with respect to the mount.

Abstract: A camera shake alarming apparatus comprises a storage portion for storing specification information of a camera; a subject distance detecting portion for detecting a subject distance for photographing a subject; a calculating portion for calculating an allowable camera shake quantity on the basis of a shutter speed set in the camera when photographing the subject, the camera specification information stored in the storage portion and the subject distance detected by the subject distance detecting portion; a camera shake detecting portion for detecting a camera shake quantity of the camera; a comparing portion for comparing the allowable camera shake quantity calculated by the calculating portion with the camera shake quantity detected by the camera shake detecting portion; and an alarming portion for giving an alarm for the camera shake according to a compared result of the comparison portion.

Abstract: A rope suspension apparatus for an elevator system, includes a bed, a motor 1 attached to the bed, a motor shaft 2, a traction sheave 4 so mounted on the shaft that the ends of the traction sheave are inclined at an angle relative to vertical, and at least one diverter pulley 5, such that at least one suspension rope 11 may run from an elevator car to the traction sheave via a route between the traction sheave and the diverter pulley. The arrangement provides that each suspension rope may, after passing around the traction sheave, 1 run to the respective one of the at least one the diverter pulley via a route proximal to that of the suspension rope going towards the traction sheave, and at least one counterweight may be suspended on the suspension rope below the diverter pulley wherein the traction sheave has been rotated substantially sideways by an angle substantially equal to the angle that the ends of the traction sheave are inclined relative to vertical.

Abstract: An earth drilling machine includes a crown block assembly, a travelling block assembly and a drawworks. The drawworks includes a drum which rotates about a drum axis. The drum axis is oriented at right angles to a fast line plane defined by a fast line sheave included in the crown block assembly. In this way, the fleet angle between the drum and the fast line sheave is kept substantially equal to zero. Various sheave arrangements are described which combine proper selection of sheave pitch diameter, sheave axis angle, and sheave placement to ensure that the fleet angle of all of the sections of line extending between the crown block assembly and the travelling block assembly are reeved with a fleet angle exactly equal to zero. In this way line wear is reduced and the height, weight and windage of the mast are all minimized.

Abstract: In a traction drive elevator system, the ropes from the counterweight are fed over a secondary or deflection sheave to the bottom of a drive sheave, around the drive sheave for more than 180.degree. and then to the elevator car. The sheaves contain polyurethane inserts for the rope. The draw angles, vertical and horizontal, are 1.5.degree..

Abstract: Disclosed is a sheave assembly for supporting a downward extending cable wherein a plurality of rollers are disposed upward and outward in a staggered manner from a plane defined by a downward facing arcuate path along which the cable approximately passes and wherein each roller comprises a plurality of portions constructed, configured and dimensioned to conform to cables having different diameters and being composed of differing materials, if desired.

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: A telescopic mast comprises a plurality of mast sections (2, 3, 4) which can be displaced axially relative to one another while guided by each other. The sections are arranged to be moved out of one another by means of a continuous line (13), which passes and co-acts with all mast sections, from the outermost to the innermost section. Each mast section (2, 3, 4) includes at least one lower line-guide pulley (5, 6, 7) and one line-returning unit (8, 9, 10) arranged at the upper end of a respective section. That part of the line (18) extending between the pulley (5) and the line-returning unit (8) of one section (2) and between said line-returning unit (8) and the guide pulley (6) of the nearest inwardly lying section (3) is fully protected in a space located between the sections (2, 3). The sections suitably comprise open-ended, closed-wall cylinders (2, 3, 4) arranged to fit within one another with a small clearance therebetween and which enable the mast to be used in the absence of guys.

Abstract: A log skidder (10) has a fairlead (26) with a main guide roller (54) having a special contoured surface (60) to prevent grooving of the surface of the guide roller (54), to prolong cable life, and to assist in evenly winding the cable (32) on a winch drum (33). The special contoured surface (60) of the guide roller (54) includes a pair of shaped or rounded shoulders (68) at the side extremes which are aligned with the side rollers (44,46) in a way that a cable (32) passing over the main guide roller (54) in contact with one of the side rollers (44,46) receives a downward and inward centering force component which moves the cable (32) toward the midportion of the main guide roller (54).