Abstract: A plurality of spring clips (30), each having an elongated central member (32) with first (40) and second (38) ends and a plurality of resilient arms (36) radially extending therefrom, are simultaneously transferred between a transfer plate (90) and a pallet (20). The first ends (40) of the member (32) are lockably engaged in the transfer plate (90) with the second ends (38) thereof positioned into apertures (24) in the pallet (20). The central member (32) is rotated to release the first ends (40) from the transfer plate (90) while simultaneously lockably engaging the second ends (38) to the pallet (20) to secure the clips (30) therein and to capture a chip carrier (10) between the ends of each arm (36) and the pallet (20).

Abstract: A method and apparatus for removing a propeller hub secured by a nut to a tapered drive shaft. A puller abutment is fixed to the hub in position to engage the nut and prevent axial movement of the nut relative to the hub. Rotation of the nut against the axially immovable abutment results in axial movement of the hub, nut and abutment relative to the shaft, separating the hub from the shaft. Continued rotation of the nut separates the hub and nut from the shaft.

Abstract: An apparatus for sealing a cylindrical storage cell comprises a main holder accommodating the storage cell, an auxiliary holder accommodating a rod, and a means for rolling-in the housing of the cylindrical storage cell including two shafts secured coaxially in the wall of the auxiliary holder. Mechanically linked with each such shaft are a seaming roller and an element for adjusting the distance between the seaming rollers interconnected therebetween, a stop means for limiting the movement of the seaming roller being in turn connected to the element for adjusting the distance between the rollers.

Abstract: Apparatus is disclosed for attaching a flexible annular member to a rigid member using an annular tongue on an annular bead on one of the members that is engageable in an annular groove in an annular bead on the other member, and further using a preformed resilient lock ring that is split so as to have oppositely facing ends and has a C-shaped cross-section with a radially outwardly facing peripheral side so as to be mountable over and then clamp together and hold the beads on the members with their tongue and groove engaged.

Abstract: A tool to facilitate the mounting and centering of dual wheels on an axle hub and the method for using the tool. The tool is a pin structure having coaxial female threads at one end, allowing the pin to be attached to the threads of the lug bolt, serving as an outward extension of the lug bolt. One or more such tools are attached to lug bolts on the axle hub, providing a pin or pins upon which the two wheels may be placed sequentially. In this configuration, the two wheels counteract and hold each other in properly centered orientation while they are fastened to the axle hub with lug nuts. After the dual wheels are fastened in place, the pin or pins are removed and the lug bolts to which they were attached are also used to fasten the dual wheels to the axle hub.

Abstract: A stop device for application to an outboard marine engine to retain the propeller against rotation while the prop nut is being tightened or loosened. The device is T-shaped and includes side wings and a vertical leg. The wings have slots which permit the device to be slipped onto a tail plate located above the propeller. The leg extends downwardly between the blades of the propeller and engages the blades to prevent propeller rotation.

Abstract: When tightening a screw member with a nut runner, the turning angle of the screw member and the tightening torque of the same are detected. The ratio of increase in torque to increase in the tightening turning angle, that is, the torque increasing rate is calculated. Tightening of the screw member is terminated when the force imparted to the screw member exceeds the elastic limit of the screw member and reaches a predetermined tightening point in the plastic range. The total tightening turning angle and the final tightening torque are detected upon termination of the tightening. The elastic tightening turning angle portion of the total tightening turning angle is calculated on the basis of the final tightening torque and the torque increasing rate in the elastic range, and the plastic tightening turning angle portion of the total tightening turning angle portion is calculated by subtracting the elastic tightening turning angle portion from the total tightening turning angle.

Abstract: The invention relates to a method and mechanism for preliminary anchoring of a wire rope bolt in a bore by means of friction. The object is to eliminate the need to use wooden wedges or to bend the strands of the rope backwards, procedures which are time-consuming. In accordance with the invention, a permanent deformation is produced in the wire rope bolt in such a way that friction force is produced when parts of the bolt press against the wall of the bore. The mechanism may comprise, fitted at a point prior to feeding rolls, a bending roll, which bends the wire rope before it is fed into the bore. The circumference of the feeding roll can be V-shaped, in which case it causes the bent wire rope to rotate and to become helical.

Abstract: A process and apparatus for finishing the surface of a guide roller uses a drive belt under tension to ensure a uniform surface finish. Prior to surface machining, bearings at el. are inserted into the central bore of a guide roller sleeve to form a guide roller assembly. The assembly is mounted loosely on a stationary shaft and driven to rotate by an endless drive belt at a known tension. A cutting bit machines the outer surface of the sleeve as it rotates. The bit pressure against the sleeve is less than the frictional force of engagement between the guide roller and the belt.

Abstract: An element removal tool for use with transmission lines for fluids (such as natural gas) under pressure which permits replacement of the element, in a specific case the axle box which is coupled between a metering chamber and the indexing mechanism in a gas meter, in a fluid transmission system, without shutting off downstream-customer service, the problem of properly seating the axle box in the undergear which drives it, despite slow rotation of the driving mechanism in the metering chamber, being overcome by dual concentric shafts relatively rotatable and slidable with respect to each other, the inner shaft carrying a socket which engages, firmly, the rotatable indexing shaft of the axle box, the outer shaft carrying a socket which is adapted to firmly engage the flange of the axle box for removal and replacement of the axle box, each shaft having at its end remote from its respective socket, a knob for rotating that shaft, the outer shaft passing through and hermetically engaging a stuffing box, connected

Abstract: Apparatus for cleaning each threaded marginal end portion of large pipe. The apparatus has a cleaning head assembly which includes a rotatable member having circumferentially spaced cleaning brushes adjustably mounted thereon so that the cleaning brushes can engage and clean the opposed pipe surface at the opposed marginal terminal ends of a joint of pipe. Spaced plate-like members are axially arranged along a common shaft, and the opposed faces of the plate members have the cleaning brushes adjustably mounted thereto and arranged so that the common shaft can be rotated in a horizontal plane, thereby bringing the brushes of one of the plate members into cleaning engagement respective to the pipe threads, and thereafter the assembly is rotated 180.degree.0 in a horizontal plane, thereby bringing the other set of brushes into cleaning relationship respective to the opposed pipe end.

Abstract: A unique connector and insertion tool are disclosed. The connector is hollow with screw-type threads on its outer surface, an enlarged head at one end and a non-sharp configuration at the other end. The insertion tool has a non-sharp elongated shaft or piercer attached to a handle; the end of the piercer is adapted to allow piercing and passage through the materials being secured together. The connector slides over the piercing shaft, is held in secure non-rotating relation thereto, and is configured to penetrate the materials and be screwed into place by the insertion tool. The entire piercing and connection operation may be conducted in a twisting motion with just one hand.

Abstract: Disclosed is a tool for holding a lawnmower blade for installation and removal thereof. The tool comprises an elongate lever having a handle at one end, a blade engaging section about the other end, and a channel therebetween for accommodating the housing of a lawnmower. The blade engaging section comprises a pair of spaced-apart adjustably mounted stop pins for preventing rotational movement of a lawnmower blade placed therebetween. The stop pins have inwardly-facing retaining heads for preventing the lawnmower blade from slipping off said stop pins.

Abstract: A helix of great length wherein the structure is filled with a filler and wherein the structure is produced by a practice in which the helix structure and filler material are caused to rotate about each other upstream of the point of convergence, while the helix retains its orientation, and the speed of advance of the helix and the speed at which the filler material and helix are rotated are so adjusted that the helix is advanced by one winding during each rotation.

Abstract: For the purpose of mounting a motor vehicle window, especially a windshield or rear window, into the body opening provided therefor, rotatable and fixable eccentric members attached to a body panel are being employed. The eccentric members are inserted into apertures provided in the body panel by means of their cylindrical portions and are adapted, when being turned, to move the windshield, after insertion of the same into the flange portions, upwardly into its final position. The turning of the eccentric members is accomplished by a special tool which may be provided with means for adjusting the torque. The windshield is fixed in this position by pins forced through the cylindrical portions of the eccentric members.

Abstract: Disclosed is an apparatus for threadedly fitting a buttress tapered external thread portion and a buttress tapered internal thread portion each other. A detecting internal thread portion provided on the gauge is threadedly fitted into the buttress tapered external thread portion, and the buttress tapered internal thread portion is threadedly fitted into a detecting external thread portion provided on the gauge. As a consequence, a helical locus position of the tapered external thread portion and a helical locus position of the tapered internal thread portion are detected. Next, after the gauge has been removed and in the state wherein the thus detected helical locus positions are put in order each other, the tapered external thread portion and the tapered internal thread portion are relatively turned whereby these tapered external thread portion and tapered internal thread portion are threadedly fitted each other.

Abstract: An installation for assembling two parts adapted to be telescoped one into the other, of which at least one part has a radially directed projection which, during assembly of the parts, engages into a correspondingly constructed recess of the other part, whereby the first part is nondisplaceably arranged and the second part is aligned with the first part, and finally the second part during rotation threof about its longitudinal axis and simultaneous axial displacement is assembled with the first part; the second part is thereby positioned by a retaining mechanism which positions the second part with respect to the first part in relation to the joining axis while a threaded spindle adapted to be driven by a motor and held by a rigid support cooperates with the second part by way of a spring-loaded compression mechanism; the threaded spindle is thereby equipped with a slippage clutch.

Abstract: A machine for assembling flexible hose to hose end fittings utilizing a socket. In such machines the socket is chucked and rotated and the hose end is inserted into the socket for engagement by the internal spiraled socket serrations. In the invention, manually operated force multiplying apparatus in the form of a winch forces the hose clamp and hose, toward the socket, and by use of a reversing bar the winch may be used to disassemble the hose and socket by reversing the direction of axial force on the hose.

Abstract: A device used for attaching a joint having a sleeve to one end of a hose body having a predetermined length before the joint is secured thereto by caulking, for example, during the manufacture of a brake hose. The device includes a chuck body which is rotatable about its own axis, and reciprocable along the longitudinal axis of the hose body. The chuck body has a stationary portion and a movable portion which are divided from each other by a plane passing through the longitudinal axis of the chuck body. The movable portion is reciprocally movable in a direction perpendicular to the plane mentioned above. The joint is chucked in axial alignment with the hose body when the movable portion is moved into contact with the stationary portion. The device is small, and enables a reduction in the time and labor required for the job in question.

Abstract: A method and device for use in regulating torque application to a drill string when joining drill string segments using a tong and winch combination. A tension gauge and an angle measuring gauge continuously read tension on the winch line and the angle between the winch line and the tong arm. Actual torque on the drill string segments is calculated thereby and used to deactuate the winch clutch when a desired torque has been applied. A display and printer can display and print torque information as the process of make up proceeds.

Abstract: A process is disclosed for tightening a joint having a threaded joint element. This invention makes it possible to apply a predetermined tightening force to the joint. The process uses the real factor of proportionality (K) between the force for tightening the joint and the screwing torque applied to the threaded element which is determined after a preliminary screwing cycle and unscrewing cycle have been performed. Application is particularly to automation of tightening of prestressed joints.

Abstract: Screw clamp pin extractor for clamping pins of the type having a body fastened to a spreader lying between two tongs secured to a screw, and a nut acting against a spring. The extractor comprises a pneumatic motor, a nose portion engaging the clamp pin and carrying a sleeve brought into contact with an assembly of sheets, said extractor comprising moreover an internal mechanical system. When the motor rotates for unscrewing pins the device is locked on the pin and the nut of same can be unscrewed, and thereafter, the pin is extracted through the action of a jack. The extractor can be attached as desired either to the body of the usual manual screwing machine or a robotic head known in itself.

Abstract: An apparatus for controlling the number of turns made and the torque applied during the operation of making a threaded joint includes a high resolution turns counter. The turns counter senses the rotation of a member of the joint and generates a pulsed signal, each pulse representing a predetermined increment of rotation. The turns counter includes an idler wheel driven by one member of the joint and in turn driving an encoder which generates a relatively large number of pulses per revolution of the idler wheel. A presettable divide-by-N circuit is utilized to divide the encoder pulses to generate a pulse train to a monitoring and control apparatus for indicating whether a good or a bad joint has been made. The divide-by-N counter can be preset to generate a predetermined number of pulses per revolution of the joint member or pulses representing a predetermined percentage of a total number of turns to be made.

Abstract: A portable power operated apparatus that may be positioned adjacent a first stack of lengths of oil well tubing having collars screwed on first ends thereof. The lengths of tubing are subsequently removed from the first stack onto the apparatus. Each length of tubing after being disposed on the apparatus is power rotated with the collar being removably held stationary relative to the tubing to separate the collar therefrom. The collar after removal is inspected, and if found satisfactory for further use is directed to the rearward end of the apparatus. The collar at the rearward end of the apparatus is removably gripped in a reverse position and screwed onto the second end of the tubing by rotating the latter. The length of tubing with collar attached is then lifted by the apparatus and moved to a second stack of tubing where it remains until again needed.

Abstract: Disclosed is an apparatus and method for holding a conduit coupling in place during the process of transporting and attaching the coupling to a length of conduit which substantially eliminates problems with cross threading, coupling and conduit damage, lengths of conduit without couplings and the like.

Abstract: A thread cutting machine for pipes which comprises a machine base on which pipe holding chucks, a pipe rotation drive mechanism, a thread cutting mechanism and a threaded coupling holding chuck mechanism adapted to hold a threaded coupling such as socket, elbow or the like in position are provided. The machine is capable of fastening the threaded coupling to the pipe after the pipe threads have been formed as well as the inherent pipe cutting-off and thread cutting functions.

Abstract: An apparatus is provided for controlling the speed of rotation of a joint member during the operation of making a threaded joint. At lower speeds of rotation, a counter means receives clock pulses generated at a predetermined frequency and counts down from a stored value representing the elapsed time for a maximum rate at which turn signal pulses generated during predetermined increments of rotation of the joint member should be generated. If the elapsed time between the turn signal pulses is less than or equal to the stored time, a signal is generated to slow down the joint making operation. At higher speeds of rotation, a counter means receives the turn signal pulses and counts down from a stored value representing the maximum number of turn signal pulses which should be generated in a predetermined time interval. If the turn signal pulse total exceeds the maximum number during the predetermined time interval, the slow down signal is generated.

Abstract: Apparatus for removing the frozen head of an annular type blow-out preventer, wherein an annular frame is mounted over the threadedly attached head leaving a central, top portion of the blow-out preventer head exposed to receive a torque arm adapted to be secured to the preventer head, torque being applied to the torque arm from hydraulic power assemblies mounted on the frame for breaking the threaded connection between said preventer head and body.

Abstract: A positioning tool for use in attaching the cover panels to support members in a prefabricated building system using self-drilling and self-tapping fasteners and a locking member which includes locating means for positioning the locking member behind the overlapped cover panels and guide means for locating the fastener against the support member opposite the locking member so that the fastener is aligned with the locking member and, as the fastener is installed by self-drilling and self-tapping its way through the juxtaposed support member and cover panels, the locking member will be threadedly engaged by the fastener to hold the cover panels against the support member between the head of the fastener and the locking member.

Abstract: A collar threads onto a shear pin. When the collar engages a surface of a workpiece, resistance to further threading increases. When sufficient resistance to threading occurs, a setting driver upsets lobes of the collar and forces these lobes radially inward toward the axis of the collar. Material of the collar inside the lobes responds to deformation of the lobes and flows radially inward against the shear pin to lock the collar, shear pin and workpiece together. The driver then rotates freely and a joint has been made with a predetermined clamp-up load and its component parts locked together.

Abstract: An attachment for a power driven installation tool for a threaded fastener and a stress plate includes a barrel assembly connectable at a first end to the driver and terminating in an outer barrel at a second end. The outer barrel terminates in a stress plate holder and the stress plate holder is free to move with respect to the rest of the tool. In a preferred embodiment, a floating barrel is positioned for slidable movement within the distal end of the outer barrel and a stress plate holder is rigidly secured to the floating barrel and external of the outer barrel.

Abstract: Apparatus and method for determining dynamic friction in a threaded joint and an associated tightening system for tightening such joints including threaded fasteners. A value representative of the coefficient of friction in the threaded joint is obtained by determining the gradient of a torque-rotation curve which could be plotted for the joint being tightened, and dividing this gradient by the product of the fastener pitch diameter and the tension rate of the joint. The desired tightened condition is achieved by computing the tightening torque required to induce a predetermined preload in the threaded fastener and comparing this computed torque with the instantaneous torque being imparted to the fastener. When the two torques are equal, tightening of the fastener is stopped.

Abstract: Apparatus and method for tightening assemblies held together by threaded fasteners. The desired tightened condition is achieved by calculating the tightening torque required to induce a preload in a fastener equal to or approximating a predetermined preload and comparing this calculated torque with the torque being imparted to the fastener to tighten the assembly. When the two torques are equal, the torque imparted to the fastener is stopped. The tightening torque is calculated by identifying properly the relationship between the actual torque-rotation curve through which the assembly is taken as it is being tightened and the theoretical torque-rotation curve for the assembly from which a theoretical tightening torque required to induce the predetermined preload is established.

Abstract: Apparatus and method for tightening assemblies held together by threaded fasteners. The desired tightened condition is achieved by calculating the tightening torque required to induce a desired preload in the threaded fastener and comparing this calculated tightening torque with the torque being imparted to the fastener to tighten the assembly. When the two torques are equal, the torque imparted to the fastener is stopped. The tightening torque is calculated by identifying properly the relationship between the torque-rotation curve through which the assembly is taken as it is being tightened and the preload-rotation curve for the assembly.

Abstract: Apparatus and method for tightening assemblies held together by threaded fasteners. Prior to tightening, the gradients of a selected number of possible torque-rotation curves for the assembly are established and stored along with the associated tightening torques required to induce a desired preload in the fastener when the assembly is tightened according to the selected torque-rotation curves. As torque and rotation are imparted to the fastener to tighten the assembly, the gradient of the actual torque-rotation curve through which the assembly is taken is calculated. The calculated gradient is compared with the stored gradients to derive that tightening torque which is associated with that stored gradient closest in magnitude to the calculated gradient. The derived tightening torque is used to control the torque applied to the fastener.

Abstract: An apparatus for automatically rotating screw-on connectors onto the stripped ends of electric wires, including an elongated housing having an inlet opening at one end for the reception of the connectors and an outlet opening at the other end for their discharge. The connectors are received in a rotatable and hollow drive shaft in the housing, and a sleeve is concentric with, around, and rotatable with the drive shaft. A plurality of fingers with a free end are secured to one end of the sleeve, which is axially movable towards the outlet opening by manually operated cam means acting between the housing and sleeve. Upon this axial movement, the fingers engage cam surfaces in the drive shaft and adjacent the outlet opening to cause gripping engagement of those fingers with a connector located adjacent the outlet opening.

Abstract: There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a plurality of fasteners of the type ultimately to be tightened. In one embodiment, torque and angle are monitored during tightening. Calculations are conducted, while tightening, to determine the tension prevailing in the bolt at a particular angle of advance. By using the calculated tension value and the particular angle of advance, an instantaneous position of threading advance on the tension-angle curve of the fastener is established. From this instantaneous position, it is determined how much greater angle of advance or how much torque is required to tighten the fasteners to a final desired tension value. The same technique may also be used merely to monitor tightening which is terminated by a different tightening strategy.

Abstract: A device for installing a threaded bush into a work piece has a housing containing a rotatable threaded rod. A pressure responsive piston in the housing axially moves the threaded rod with respect to the housing. A rotatable abutment sleeve is provided between the housing and the threaded rod. The bush is initially threaded on the rod and then screwed in the workpiece by rotation of the rod until a collar of the bush contacts the surface of the workpiece. Thereafter the rod is axially retracted to cause the abutment sleeve to deform a smooth walled portion of the bush to complete the installation.

Abstract: A tool for use by an operator in the field in attaching and securing a bushing assembly within an electrical connector and subsequently connecting or disconnecting the electrical connector and a terminal of an electrical apparatus to establish a connection from a remote location through the use of an insulated implement, such as a hot-stick. The tool includes an operating member with a wrenching configuration for engaging a complementary wrenching arrangement in the bushing assembly, a wrenching portion for direct wrenching of the operating member and a torque responsive device through which the insulated implement is coupled to the operating member to enable rotation of the insulated implement relative to the operating member upon exceeding a predetermined torque indicative of the appropriate seating of the electrical connector upon the terminal so that such relative rotation serves as an indication to the operator that the connection is complete.

Abstract: Apparatus and method for tightening assemblies held together by threaded fasteners. The desired tightened condition is achieved by turning the threaded fastener through a precise tightening angle required to induce a predetermined preload in the threaded fastener and calculated from input parameters characteristic of the assembly being tightened and the predetermined preload. The tightening angle is measured from the onset of linearity of the preload-rotation curve for the assembly by sensing the onset of the substantially linear tightening portion of the torque-rotation curve through which the assembly is taken as it is being tightened.

Abstract: A method and apparatus for tightening an assembly including a pre-load indicating fastener is disclosed. Pre-load indicating fasteners are generally tightened until a crushable element, forming a portion of the pre-load indicating fastener, is plastically deformed. The present invention permits such fasteners to be tightened until the crushable element of the fastener is completely deformed. This reduces the problem of relaxation generally associated with such fasteners. The present invention permits joints including such fasteners to be tightened by automatic tightening systems, if so desired. The assembly is tightened until the crushable element of the fastener is fully plastically deformed and elastic deformation of the joint has commenced. Sensing means are provided in the automatic tightening system to enable detection of this point and to automatically stop the tightening system when this point is reached.

Abstract: A hand-held tool to use in extracting ring seats from housings such as small engine carburetor needle inlet valves is disclosed. The tool has a generally cylindrical handle means. From one end of the handle means a helical or threaded arm projects, ending in a tip. By inserting the extracting arm into the housing, pressing the arm end opposite the seal and turning the tool, the seal threads itself on and up the arm. Withdrawing the tool with the threaded seal on it from the housing thus removes the seal. A further embodiment combines with the foregoing a tamping member which projects from the other end of the handle means. The tamper, with its tip, aids in inserting a fresh seal in the housing.

Abstract: An apparatus for use in removing and replacing a grinding wheel of a portable industrial grinder of the type having an output shaft, a grinding wheel support sleeve on the shaft, a non-circular collar formed on the sleeve, and laterally extending handles. The apparatus includes an upstanding housing having a top wall with a slot formed therein. The slot is open at one end and is dimensioned to receive and engage the non-circular collar of the shaft support sleeve of the portable grinder with the grinding wheel being supported on the top wall. The housing is equipped with an opening in at least one side thereof to permit the portable grinder to be positioned in the housing below the slotted top wall. A grinding wheel clamp adapted to engage the grinding wheel when it is supported on the top wall of the housing is provided.

Abstract: An apparatus for assembling the components of a trophy includes a socket for engaging a nut employed to connect the components, a bidirectional motor coupled to the socket, a clutch mechanism coupling the bidirectional motor to the socket, a spring retained between the motor and the socket to allow axial movement of the socket relative to the motor, and a bracket for adjustably mounting the motor, clutch mechanism, and spring beneath a work surface for supporting the components of the trophy. The socket is biased upward by the spring so that it projects above the working surface. The motor is operable in a first direction to tighten the nut and in a second direction to loosen the nut. The clutch mechanism provides a torque-limited connection between the motor and the socket in the first direction to prevent excessive tightening of the nut and a positive connection in the second direction to loosen the nut.

Abstract: A shipping assembly for a hydraulic jack in which the cylinder of the jack is shipped in sections. First and second shipping caps are fastened to predetermined ends of the cylinder sections during shipment, with the first shipping cap utilizing certain of the same cylinder joint fastening hardware which will subsequently be used to join the cylinder sections at the job site. The first and second shipping caps are cooperatively configured to enable them to be assembled into a complete, self-contained shipping package for return to the factory, using the fastening hardware used to secure the second shipping cap to a cylinder section.

Abstract: Set out herein is a fastener assembly which, together with a fastening tool may be used to align and secure structural members to each other, the structural members having misaligned securing apertures. Particularly, this invention relates to a device consisting of two eccentric bushings nested and swaged together while still permitting their relative rotation, and a special tool used for their installation. The present invention also relates to the use of the nested eccentric bushings with multiple threaded fasteners and nuts, and spiral cam ended pins with spring retainers to achieve a quick-release attachment. In addition, this invention relates to the retention of the fastener members in the nested bushing assembly and the retention of the bushing assembly in the access panel when the panel is removed. The present invention relates to the use of the nested eccentric bushings in conjunction with standard round shank screws, bolts, platenuts, nuts, washers and other fastener hardware.

Abstract: Stud bolts are threaded into the body of a nuclear reactor vessel and tenned by exerting forces on tensioning nuts located on the upper end of the studs. While the studs are under tension, a cover is attached to the vessel by tightening nuts on the studs against the cover. The tensioning nuts are applied to the studs by immobilizing the studs axially and rotationally, and rotating the tensioning nuts with a pair of driven, diametrically opposed striking rollers. External threads on the striking rollers, external threads on the nut and internal threads on the nut all have the same pitch so that the threads on the striking roller remain engaged with the external threads on the nut as the nut moves axially while being threaded onto the immobilized stud.

Abstract: A remotely-controlled tightener for selectively tightening and loosening electrical connectors between electrolytic cells.

Abstract: A work stand specially designed for supporting and aligning the various components of a vertical turbine pump during assembly or disassembly. A plurality of support tables are mounted at longitudinally spaced positions along a stationary bed frame for independent powered vertical adjustment. Roller support cradles are carried by each table to supportingly engage the pump at longitudinally spaced positions to support the various parts of the pump in coaxially aligned relationship with each other. The cradles may be adjusted longitudinally of their tables, and a series of bores spaced longitudinally along the bed frame provide for the mounting of stationary clamp assemblies upon the bed frame between the tables. A powered elevating platform at one end of the bed provides a support for the discharge head of the pump, or alternatively a support, a support cradle, or stationary clamp.

Abstract: There is disclosed a technique for tightening threaded fasteners in which values of offset torque, initial tension rate relative to angle, final tension rate relative to angle and other joint related factors are empirically determined by instrumenting a plurality of fasteners of the type ultimately to be tightened. In one embodiment, torque and angle are monitored during tightening. Calculations are conducted, while tightening, to determine the tension prevailing in the bolt at a particular angle of advance. By using the calculated tension value and the particular angle of advance, an instantaneous position of threading advance on the tension-angle curve of the fastener is established. From this instantaneous position, it is determined how much greater angle of advance or how much torque is required to tighten the fasteners to a final desired tension value. The same technique may also be used merely to monitor tightening which is terminated by a different tightening strategy.