Abstract: The present invention is directed to a device for lifting heavy items from machinery in confined areas. The device of the invention can be easily mounted on a particular piece of equipment and allows for the easy removal of the part or item to be repaired or replaced. Because of its relatively small size, the device can be readily used in confined areas.

Abstract: The invention deals with a cable tensioning system for elevators with separate drive cable and support cable lines 10, 11, which both engage at an elevator cabin 12 and also at a counterweight 13, characterized in that the cable tensioning system comprises a rocker 20 configured as a lever and supported at the counterweight 13 or the elevator cab 12, at which rocker the support cable 11 and the drive cable 10 are fastened to be spaced from each other, that the spacing ratio a:b of the attachment points 31, 32 of the cable lines 10, 12 at the rocker 20 from the support point 21 of the rocker 20 at the counterweight 13 or the elevator cab 12 define the cable tension or pull ratio required for the driving capacity.

Abstract: A rope hoist rope guide is readily mounted on a drum by a unique split ring construction and includes unique rollers which cooperate with the grooves in the drum to position the guide ring and accurately deploy the rope to appropriately lay the rope in the drum grooves regardless of side forces applied.

Abstract: A hoist for lifting and lowering an equipment in a well comprises base member; a belt for removably securing the base member to a vertical wall portion of the well casing; a boom with its first end being secured to the base member and its second end extending above the well casing; and a winch assembly operably associated with the boom for lowering and lifting the equipment in the well.

Abstract: A payout control arm is angularly displaceable about a brake shaft during yout of a cable from a storage reel in response to tensioning forces transmitted through the cable from a payout load, the cable being entrained about a pulley rotatably carried on the control arm in spaced relation to the brake shaft. Gearing drivingly connects the pulley to the brake shaft to stop payout and cause the cable to frictionally grip the pulley in response to brake engagement thereby preventing continued transmittal of tensioning forces to the reel.

Abstract: A hoist and method are provided for lifting objects inside a vessel having a wall defining a port and having a platform on the exterior of the wall. The hoist includes a frame with a support portion extending outwardly from the port adjacent the platform and a cantilevered portion for extending through, and inwardly from, the port. A suitable clamping system is provided for clamping the frame support portion to the platform. A hoist cable is provided along the frame from the support portion to the cantilevered portion and extends over a sheave at the end of the cantilevered portion so that it hangs down inside the vessel. A winch is operatively engaged with the hoist cable and is mounted to the frame support portion for feeding out and retracting the cable whereby the end of the cable may be raised and lowered inside the vessel.

Abstract: A pulley assembly is provided for an operating cord. The pulley has a body with a rotational axis and an annular outer surface concentric with the rotational axis. A cord retention member has a surface to be situated around the annular outer pulley surface in operative relationship with the pulley and extending more than 180.degree. around the annular outer pulley surface. Structure is provided on the pulley and cord retention member to cooperate with the cord so that the cord prevents separation of the pulley and cord retention member from their operative relationship.

Abstract: Pulley hoists are disclosed which provide moving anchor hooks that are suspended by two "pulls" of rope, and which may be fabricated by a single part. Anchor hooks are also disclosed which have multiple, independently movable hook portions so that certain large objects may be moved using a sole power unit having said anchor hooks at either end thereof. The anchor hooks of the present invention are also provided with tension indicator apparatuses and safety apparatuses in the event of the overloading of the device. Safety apparatus and sound alarm apparatus are also provided on the power units of the pulley hoists of the present invention in the event of the overloading of the device.

Abstract: Apparatus for lifting electric line poles is disclosed which also enables a ground rod or stake to be driven into the ground next to such a pole. There is provided a telescopic mast having a hoist with a rope run over pulleys to a lifting hook and attached at the upper end of the mast. For driving in ground rods or stakes a carriage mounted for movement along the mast is used which can be attached to the lifting hook and can secure an air hammer.

Abstract: A hydraulic or pneumatic cylinder supports a pair of non-circular discs and a circular pulley about which a hoisting cable and a carrying cable are trained. The discs are configured such that a constant force is exerted on a load supported by the hoisting cable independent of the variation in pressure in the cylinder due to displacement of the piston supporting the discs. The carrying cable comprises two runs; one having one end fixed to one of the discs and the other end fixed to the supporting base, and the other having one end fixed to the other disc and the other end fixed to a pulley block supporting the load. The hoisting cable extends from a winch, over the circular pulley, to the pulley block. The arrangement compensates for relative motion between the load and the supporting base.

Abstract: An oil well service rig having three reels, two of the reels actuated by a hydraulic pump through a gear box which provides for selective engagement or disengagement and a two speed gear ratio change for either reel, the hydraulic pump being driven by a gasoline engine. An independent hydraulically operated brake system is utilized on the reels wherein one side of each reel is provided with a greater diameter than the other side, the larger side having a brake caliper pad assembly in engagement therewith. A smaller reel, also controlled by the hydraulic motor, controls the inclination and disposition of a mast having a double sheave assembly at its top receiving cables from each main reel for raising and lowering tools into the oil well shaft.

Abstract: The invention relates to a safety device for winch-type apparatus for moving loads.Two longitudinal elements containing a winch between them are connected by a first transverse element on which two telescopic sleeves are pivotably mounted. A calibrated spring is received in each pivotable sleeve. A second transverse element also connects the two longitudinal elements. The second transverse element supports the sleeves and a yoke of a guide pulley for a cable to be wound and unwound from the winch. The tension in the cable causes the springs to pivot the yoke thereby preventing excessive tension on the cable when a load drawn by the winch encounters resistance and preventing excessive unwinding of the cable when the load is interrupted in its descent.The safety device can be used in all winch-type apparatus, and in particular in hoisting apparatus with telescopic ladders for building sites.