Abstract: A bolt includes a movable pin in the center thereof. This pin can freely move up and down in the bolt. If the pin protrudes out of bolt a predetermined distance after the bolt is screwed into a blind bolt hole, then an inspector knows that the bolt is fully engaged. If, on the other hand, the bolt is not fully engaged, the pin will not protrude the predetermined distance out of the bolt. A second embodiment of the similar invention is a stud having an indicator pin. In third and fourth embodiments, the bolts and studs have indicator pins including grease zerks. These grease zerks allow the holes to be filled with grease to prevent damage to the hole due to corrosion.

Abstract: An improved hoisting device, such as a hook, shackle, ring, link, or the like, includes indicia for determining deformation damage to the device from overstressing. The indicia includes components which assume a predetermined geometrical configuration, such as a line segment co-linearly aligned with another line segment or dot, as the device is in an unstressed and undeformed state, and which do not assume the predetermined configuration if the device have been damaged from over-stressing. The indicia also includes cooperating components for dynamically indicating the magnitude of stressing relative to the maximum design stress of the device. The indicia is adapted for both close proximity and remote stressing determinations.

Abstract: A nut for use in a bolt assembly having an adhesive anchoring capsule for attaching roof or wall supports to the rock structure of a mine. The nut has deformities in its continuous internal thread that cause the continuous internal thread to bulge inwardly toward the axis of the bore. The deformities limit the advance of the nut upon a bolt and are formed by stamping dimples into one face of the nut. When an overcoming torque is applied, the deformities in the continuous internal thread are pushed radially outwardly and the nut is allowed to further advance upon the bolt. Because the deformities do not form a break in the thread, which remains continuous, no fragments are formed to damage the bolting tool, and the bolt thread remains undamaged so that a second nut can be threaded on it to hold a screen or the like.

Abstract: A moving slide has a pair of flexible curtains mounted to its front and rear surfaces, the curtains being attached at opposite ends to front and rear support posts mounted to a base. The support posts have upper and lower pulleys. A cable is connected to the front of the slide and runs in this fashion: first horizontally across the top pulley, thence to the lower pulley, thence to the other support post, thence upwardly and finally around to the horizontal portion which connects to the rear of the slide. The cable is tensioned to a predetermined load which remains constant throughout the slide travel as the front and rear horizontal portions of the cable move. The flexible curtains are suspended from, but are not rigidly attached to, the cable. Thus, as the curtains expand and contract, the moving horizontal portions of the tensioned cable ride smoothly through the curtains, maintaining curtain support.

Abstract: A drive nut (3,7) for a rock bolt, incorporating a nut (7) with a crimped protrusion (9), and an insert (3). The protrusion is crimped to form a plurality of lips (8) adapted to retain insert (3) in the head of the nut (7), the crimping being effected by a pressing tool having a number of preferably square bars. By this crimping technique, the drive nut (3,7) can be fabricated in such a way that the breaking torque required to expel the insert (3) from the nut (7) can be limited to a predetermined range.

Abstract: An electrical connector (10) includes a plug housing (3) and a cap housing (7). A bolt housing (1) is provided with a bolt (5) therethrough for tightening the connector (10). The bolt housing has a mechanism (9) for indicating coupling completeness through a window (1c). In this way coupling completeness may be assured by the operator.

Abstract: A wheel mounting apparatus for attaching a wheel to the wheel forks of the body frame of a bicycle, comprising an axle for rotatably supporting the wheel and engageable with the wheel forks of the body frame, a retaining device for preventing detachment of the axle from the wheel forks, the retaining device being constantly biased to an operative position to prevent detachment of the axle from the wheel forks, or an inoperative position to allow detachment of the axle from the wheel forks, and a control device for switching the retaining device from the inoperative position to the operative position. The control device is operable with rotation of the wheel relative to the wheel forks to switch the retaining device automatically from the inoperative position to the operative position.

Abstract: A quick release mechanism for tightening a hub assembly having a tubular shaft between prongs of a bicycle frame fork. This mechanism includes a tightening rod extending axially through the tubular rod, a first clamp and a second clamp mounted on the tightening rod, and a control lever mounted on the tightening rod for moving the clamps between a tightening position and a release position. This mechanism further includes a device for indicating that the tightening force applied from the first and second clamps exceeds a predetermined value. The indicating device includes a shift member shiftable between a first position and a second position, a receiving member for receiving the tightening force from the clamps through the frame fork, an interlocking member for shifting the shift member to the second position when the receiving member receives a force exceeding the predetermined value, and a spring for urging the shift member to the first position.

Abstract: A monitoring unit for installation on a cable bolt comprises a tube designed to fit within a cable bolt hole and having a collar at one end thereof, a cable bolt adapted to be grouted in the rock at the centre of the tube, a base plate placed tightly against the tube collar adjacent the rock face, a centralizer sleeve designed to fit over the cable bolt to keep the cable centralized within the base plate and tube, an elongated measuring plate having a centre hole for insertion of the cable bolt to fit tightly against the base plate and a groove cut at equal distances from each side of the centre hole for allowing the measuring plate to bend if the rock moves with respect to the cable bolt, and a cable clamp for fixing the measuring plate tight against the base plate.

Abstract: Torque limiting bolt employs a number pins which shear upon the application of a predetermined torque to the bolt head. The bolt configuration insures that sheared portions of the pins are held within the bolt head to prevent undesirable scattering of the pin portions on an airstrip. A removal hex head is thinner than a driving hex head positioned over the removal hex to discourage the application of a wrench directly to the removal head. The outermost portions of the hex heads are also angularly displaced from each other for this purpose.

Abstract: A cable attachment assembly having an anchor mechanism for gripping a tension member anchored in a bore hole in a mine roof, and a roof plate mounted on the anchor mechanism in positions for observing the support being offered to the mine roof, or the yielding response of the roof plate on the anchor mechanism, or for monitoring the load-yield relationship of the anchor mechanism relative to the tension member.

Abstract: A connector half (2) includes a housing (10) and a bolt fastener (50) having a neck (56) adapted to receive a plate fastener (70) inserted transversely to the bolt through a slot (20) in the connector housing to lock the bolt to the housing. Various embodiments of the plate fastener (70), (70'), and (70") are included, and in one embodiment, the bolt is made to include a neck (54) adapted to receive projections (38) interiorly of a bore (36) in the housing to hold the bolt in position prior to insertion of the fastener plate.

Abstract: A temperature warning device for indicating when a threshold temperature has been exceeded includes a threaded bolt having a bolt head and a bolt body. The bolt head and bolt body have a longitudinal bore defined by a surrounding surface with the bore having a closed end and an open end at the bolt head. A plunger in the bore has a plunger head and a plunger body terminating at the open end of the bore. A retaining cap is secured in the bore of the bolt head and has a cap hole through which the plunger body freely extends. A sleeve of a fusible material is contained in the bore which melts at the threshold temperature. This sleeve substantially fills a volume of the bore radially between the plunger body and the surrounding surface of the bore and longitudinally between the plunger head and the cap. A compressed spring is located in the bore between the closed end and the plunger head.

Abstract: A tamper proof sealing apparatus (10) for articles of packaging (100) wherein, the apparatus (10) includes a stud member (13) having an enlarged tab member (15) detachably associated therewith; and, a collar member (20) adapted to engage the stud member (13) in a unilateral direction; such that the collar member (20) cannot be removed from the stud member (13) without first disengaging the tab member (15) from the stud member (15).

Abstract: A nut plate retainer comprises a planar body, nut elements, and at least two orienting tabs. The tabs are formed from and extend parallel to the body. One tab has a locking element having a ramped leading edge and a cutaway trailing edge for snap engagement with an opening in a workpiece. The tabs fit into slots in the workpiece and the nut plate can be moved until the locking element snaps into place in the opening. The nut plate retainer is thereby mounted to the workpiece, and is prevented from rotation or displacement.

Abstract: As used with a nut, a device for indicating tensile strength comprises an annular groove approximately 1/8 inch in depth on the bottom of the nut adjacent to a washer. The same groove may be fitted in a bolt if the device is used with a bolt. A vertical shaft of the same diameter as the groove is also located within the nut or bolt engaging member and connects at one end to the groove. The groove and vertical shaft contain a "filler" material. A washer having a boss or protrusion is utilized with the engaging member wherein the boss or protrusion fits into the said groove. Once the washer encounters friction, when the combination nut and washer is tightened about a threaded bolt, with the connecting elements, the protrusion inside the groove pushes the filler up the vertical shaft as the nut rotates over the washer.

Abstract: A rock bolt comprises a bolt rod secured in a borehole, a retaining plate attached outside the borehole, a bolt head for the retaining plate, and a supporting connection between the bolt rod and the retaining plate. The supporting connection comprises a tubular member adapted to be inserted into the bore hole, the tubular member having an outer end and an inner end, the outer tubular member end bearing on the retaining plate, and a compressively loaded, deformable and upsettable sleeve member accommodated with a clearance in the tubular member and held between a rodside thrust face and a plateside thrust face constituted by a collar adjacent the inner tubular member end.

Abstract: A tensionable dowel for reinforcing walls and/or roofs in excavations such as mines and tunnels is described. The dowel is particularly useful in coal mines where mine walls or roofs are subject to failure. The dowel is fabricated in fibre reinforced engineering plastic and is used with a threaded nut for tensioning the dowel in the wall or roof.Also described is a process for manufacturing the dowel as well as a method for reinforcing walls and/or roofs by inserting the dowels therein.

Abstract: This invention relates to a rib bolt assembly including a collapsible yield device located between an exposed end of the rib bolt and a side of a mine pillar in which the collapsible yield device will withstand a predetermined torque but will collapse at a stress less than the failure strength of the rib bolt.

Abstract: A threaded fastener joint is proofed by a wrenching washer between the fasteners of the joint and the work. The wrenching washer has the clamp-up load applied by the fasteners to the work applied through it. After an attempt to make the joint, the wrenching washer is torqued to determine whether it turns on the work at an applied torque below some predetermined proofing torque. If it does not, the joint is satisfactory; if it does, the joint is unsatisfactory.

Abstract: A connector element is described which is suitable for connecting together two components (2a, 2b) in a system which is likely to be subject to vibration. The connector element has an indicating mechanism which provides an easily visible effect to show whether or not the two components are mated. In one embodiment the edges (10a) of a spring (10) protrude from a recessed portion (18a) in a nut (18) at the end of the bolt to indicate the unmated condition. In another form the end of an indicating lever (110) protrudes from a slot (112) in an adjusting nut (180).

Abstract: Disclosed is a fastener assembly fixable to a structural member, the assembly having means to indicate the torque and clamping force of a bolt which forms part of the fastener assembly.

Abstract: An anchoring device, such as a rock anchor, includes an anchor rod with force transmission ribs projecting outwardly from its outside surface. An anchor nut is in threaded engagement with the rod and has at least an axially extending portion formed of a material having lesser strength than the material of the rod. The anchor nut has at least two axially extending portions spaced apart by cuts through the nut, which cuts extend transversely of the nuts central axis. The portions follow one another in the central axis direction with at least the portion closer to the body into which the anchor rod extends having the lesser strength. The nut portions are dimensioned so that the portion closer to the body loses its force locking engagement with the ribs on the rod and its threads shear off when a predetermined load is exceeded. The nut portions are interconnected by narrow webs remaining after the cuts are made in the nut separating the portions.

Abstract: A connecting member comprises a rod-shaped body having a head and/or thread on the outer periphery for integrally connecting a plurality of members and a containing hole opened at one end thereof and extended longitudinally, a rod disposed in the hole so as to fix at its inner end to the inner end of the hole, a transmissive window fixed to the opening of the hole, and a fluid holding member holding a colored fluid and pressed by the open side end of the rod on the window. When a longitudinal strain developed in the body the rod release the holding member from under pressure so that colored fluid covers the open side end of the rod.

Abstract: A lug nut cover is provided having a breakage shroud for restricting access to the lug nut and a retaining cap for securing the shroud to the lug. The shroud includes an internal ledge having ratchet teeth thereon. The cap includes an exterior flange having pawls thereon. When the cap is threaded onto the lug, the ledge engages the flange at a predetermined position to stop forward threading. From this predetermined position, the pawl/ratchet arrangement prevents reverse threading.

Abstract: Disclosed is a mechanically lockable fastener assembly for maintaining workpieces assembled, when an elongated bolt with threads formed along a length thereof, and substantially axially aligned rotation resisting surfaces formed along another length thereof, is mechanically assembled with a cooperating nut having a threaded portion and a compressible portion deformable into engagement with said rotation resisting surfaces of said bolt to cause the bolt and the nut of the assembly to be inseparable by untorqued unthreading.

Abstract: A dowel assembly to be anchored in a borehole in a receiving material includes a container positioned around the axis of the borehole and located between an abutment at one end of the dowel assembly and the receiving material into which the assembly is inserted. The container is formed of two parts with one part being telescopically displaceable into the other. An hydraulic mass capable of expanding when mixed with a reaction liquid is filled into the container. The expandable hydraulic mass maintains the force acting on the dowel assembly when there is relaxation of the force originally generated between the dowel assembly and the receiving material. The container has openings through which the reaction liquid can pass into contact with the hydraulic mass. The hydraulic mass can be activated by immersing the container in water.

Abstract: A shear type separation fastener having a punch piston which shears a ring of material from the head of a bolt to face the shank of the bolt. The punch piston has a face with a shearing edge that presents an advancing point of contact with the bolt head to reduce the maximum force needed to shear the material.

Abstract: A nut element having a frangible portion for use with an elongated bar having an upper end anchored by a resin material within a drill hole in a mine roof, or the like, and a lower end extending outside the hole and threaded to receive the nut element of the invention. The nut includes a portion spaced from the threaded opening which limits relative rotation of the nut and bar. Thus, rotation of the nut with the lower end of the bar contacting the rotation-limiting portion thereof serves to rotate the bar within the drill hole, causing the upper end of the bar to rupture a conventional two-compartment resin cartridge and mix the contents thereof. When the resin has hardened to hold the bar stationary, excess torque applied to the nut serves to break the rotation-limiting portion thereof, preferably a dome-shaped cap with an opening of smaller diameter than the threaded end of the bar, allowing the nut to be snugly secured against a roof support plate and tension the resin-anchored bar.

Abstract: A compression pressure indicator includes a compression member which is disposed within a termination and is constructed such that when exposed to a pressure above a predetermined pressure a portion of the compression member protrudes from the termination thus indicating that optimum pressure has been applied inside the termination. The compression member includes an indicator portion and a collapsible portion, the collapsible portion being shaped such that when exposed to a pressure above the predetermined pressure, the collapsible portion collapses thus allowing relative movement between the indicator portion and pressure extending member such that the indicator portion protrudes a predetermined distance from an end of the pressure exerting member.

Abstract: A rock bolt stabilizer device which can be arranged in boreholes for stabilizing rock and similar host environments in mining and tunneling. The device is adapted to perform the function of a rigid profile anchor under predetermined stress conditions, and is also adapted to perform the function of an expansion anchor under given stress conditions. The device generally comprises an anchor member with mix end which can be secured near the base of the respective borehole by means of a cementitious composition. For tensioning, the other end of the anchor member can carry a bearing plate, a spacer, and a fastener for tensioning. The device also includes a sleeve which performs the function of a rigid anchor, and the sleeve substantially surrounds the anchor member. An increased armoring and anchoring efficiency is achieved with the device.

Abstract: A new fitting indicating mechanism in screw type connector housings is provided. Said mechanism comprises a male connector housing having an engaging portion; a female connector housing having cavity means for receiving said engaging portion therewithin; a tubular body having a bore contiguous to said cavity means and a plurality of flexible support arms extending into said bore toward a direction opposite to said female connection housing; and an indicator rod held to extend within said cavity means and said bore, said indicator rod being biased toward the male connector housing such that said flexible support arms covers the indicator rod when fitting engagement of both housing connectors is not completed but pushes open said flexible support arms upon completion thereof such that said indicator rod is exposed out the flexible arms.

Abstract: An expanding bolt anchor with setting force indication, has a slitted expanding sleeve which can be expanded by at least one expander engaging the bore-internal end. In the bore-internal expander (26) there is held a threaded bolt (30) which is carried in a freely displaceable manner through the expanding sleeve (20), and a spacing sleeve (32) adjoining on the bore-orifice end, the bolt terminating in a bolt head (34) or in a nut threaded thereon, under which a washer (30) is disposed which lies on the upper side of a workpiece (10) to be fastened and through which the spacing sleeve displaceably passes.

Abstract: A fastener system is disclosed comprising a nut having an axial bore provided with interior thread and a bolt having exterior thread for engagement with the interior bore of the nut. The nut has an end portion having an elliptical cross section for engaging a complementarily shaped driver. As the nut is tightened onto the bolt against a workpiece, resistance to further threading increases. When sufficient resistance to threading occurs, the driver will deform the elliptically shaped end portions of the nut, forcing material of the nut radially inward toward the axis of the nut. The portion of the bolt which engages the nut has a plurality of recesses for receiving the deformed material of the nut as it flows radially inward, thereby locking the nut, bolt, and workpiece together. The recesses of the bolt have a shoulder for abutting the deformed material to prevent unthreading of the nut from the bolt.

Abstract: A fastener for the protection of vehicle wheels, including a skirt member which fits around the wheel lug nut and a retainer member which is threaded onto the exposed end of the lug and overlies a part of the skirt member. The retainer member is recessed into the skirt member and includes a socket part which strips upon tightening to prevent removal of the retainer member from the lug.

Abstract: The disclosure relates to a fastener assembly comprising a nut and a washer that insures a minimum preload on the nut and bolt assembly by load indicator means which also maintain the nut and washer in a joint preassembly.

Abstract: A centrifugal pump having an adjustable feature enabling precise adjustment of the impeller's location.

Abstract: An installation and retainer cap is disclosed for making a secure connection between an annular internally splined collar member and an externally splined shaft end. The cap includes a cap body, a threaded driving shaft extending from the inner side of the body engaging a threaded bore in the end of the shaft, and an outer flange engaging the annular collar member. When the cap is driven in to make the completed connection, the outside face of the flange is substantially flush with the outside face of the annular collar member. Recesses are provided in the end of the shaft and in the outside face of the annular collar member to accommodate the body and the flange, respectively. A washer cooperating with the outer flange allows relative turning movement during the driving of the collar into position. An indicator pin provides an indication when the annular collar is fully installed on the shaft. An alternative embodiment utilizing a separate cap and driving bolt is also disclosed.

Abstract: A washer is described which is used in the construction of the support for the roof of a mine. The washer is fabricated such that finger like projections rupture in stages as the tension on bolts and pressure in the strata of the roof of the mine increases beyond structurely safe limits. The rupturing of the washer emits audible warning signals and also provides a visual indication of an unsafe condition.

Abstract: A splined joint between a shaft and a muff, with a support bearing in a tapered recess at the end of the muff and contractable onto the shaft to support same by a retaining member which is screwed onto the muff. The retaining member comprises a ring of a plastics or rubber material, the screw threads of which will yield to prevent over-tightening and possible binding of the bearing on the shaft.

Abstract: A yieldable mine roof support fixture in which a support member is anchored in a borehole in the geologic mass and is formed with a divergent tapering end adjacent the mine roof which cooperates with a support plate having an opening engaged with the tapering end and yieldable so as to allow the plate to slide or move along the tapering end for imposing resistance to movement of the geologic mass which varies from substantially constant to progressively increasing resistance.

Abstract: The tension head comprises essentially a sleeve with a threaded bore having opposed keyways extending therethrough. In those keyways is supported a U-shaped stop member. When the sleeve is turned up on the end of the bolt protruding from the hole until that end abuts the cross piece of the stop member, rotation of the sleeve rotates the bolt. When the inner end of the bolt is bonded to the rock, further rotation of the sleeve causes the stop member to break or deform. The lower end of the bolt pushes the deformed stop member or its fragments out through the bottom of the sleeve along the keyways.

Abstract: A metal fastener characterized by a sharp yield point and improved elongation beyond the yield point and a tensile strength (force) at least as large as the specified minimum for the grade, size, and threads of said metal fastener, which metal fastener has a nominal diameter D and comprises: one or more externally threaded components having threads of nominal diameter D with a stress area A.sub.s ; a nonthreaded shank component having a diameter D.sub.s equal to or substantially equal to the nominal diameter D extending axially with the threaded components; the shank component characterized by a reduced portion of axial length L.sub.r, the reduced portion having an axially transverse cross-sectional area A.sub.r sufficiently less than the stress area A.sub.s of the threaded components along substantially the axial length L.sub.

Abstract: This invention relates to an anchor bolt expansion unit and the bolt assembly using such a unit. The unit consists of a plurality of leaves connected together by a bail having a flat cap and fingers secured one to each leaf. The flat cap is dimpled to ensure an even distribution of tension applied to the fingers before the bail yields in use and also has a line of weakness to ensure that it will yield at a predetermined axial pressure. The fingers of the bail are also weakened at points in their length to a strength slightly greater than that resulting at the peripheral line of weakness.

Abstract: A resin or grout anchored rock or mine roof nut and anchor assembly including an elongated cylindrical anchor to be inserted in a bore hole in assembled relation with a nut after insertion of a destructible adhesive resin or grout containing cartridge. The anchor includes an elongated threaded rod to be received in threaded portions of the nut and the nut includes a frangible disc normally held by crimped lip portions forming a stop wall to stop rotation of the nut relative to the anchor when the nut and anchor are assembled at a first relative axial position and operative when the anchor is restrained against rotation in the bore hole by setting of the adhesive resin and torque above a selected threshold is applied to the nut to dilate the crimping and expel the disc to accommodate further threaded insertion of the nut onto the anchor.