Abstract: A laying head is disclosed for forming the longitudinally moving hot rolled product of a rolling mill into a helix. The laying head includes a housing carrying a cone assembly for rotation about an axis. The cone assembly has a support member with a three dimensional configuration curving around said axis. A plurality of clamp members are fixed to the support member at spaced locations along the length thereof. A plurality of discrete tubular guides are removably retained by the clamp members at operative positions collectively defining a guide path which is parallel to the curvature of the support member. Means are provided for receiving the product along said axis and for delivering the product into the first of the guides. Means are also provided for rotating the cone assembly, whereupon passage of the product along the guide path will result in the product exiting from the laying head in the form of a helix.

Abstract: A tube expander having a stop collar for limiting the axial movement of the tube end relative to the expander to prevent damage to the tube end. The stop collar is comprised of a hollow stop collar body having the end adjacent to the tube end slotted to slidingly receive a pair of stop members that can be moved relative to each other to vary the size of the aperture extending through the stop collar body. The stop collar members substantially encircle the cage and have surfaces thereon that engage the end of the tube.

Abstract: A method and apparatus for producing a thin metallic tube having a trailing end portion which optionally can be formed with an external diameter substantially corresponding to or varying from that of the remaining rolled portion of the tube rolled in a three roller skewed rolling mill. This is accomplished by causing an angular unisonal displacement of the roller axes to effect an enlargement of the rolling area, and at least during part of the roller movement, a second movement of the roller perpendicular to the axis of the tube.

Abstract: This disclosure relates in part to a hot extrusion press wherein the extrusion is cooled immediately after the extrusion operation by arranging a cooling tube including a cooling nozzle within the platen of the press and a second cooling nozzle between the platen and a water tank to which the extrusion is ultimately transferred for final cooling. The second cooling nozzle is employed to cool the extrusion and on the occasion of a cobbled extrusion, it is employed to drain the cooling tube and at the same time prevents water from flowing from the tank into the tube.

Abstract: Apparatus for the forming of long workpieces, such as bolts, spindles, shafts, etc., in a press with shaping tools mainly consisting of a plunger and a die. An ejection channel for the workpiece passes through the plunger and is situated around the axis of the latter. The apparatus includes at least two opposed clamp jaws mounted for controlled movement toward and away from each other, and situated in the plunger but outside the ejection channel, the jaws gripping the workpiece before the processing of the latter and conveying it in a centered position to the processing point, the jaws at that time entering the said ejection channel. After the workpiece has been processed by the plunger and die, the plunger with the workpiece held by the jaws thereon return to their initial positions. The apparatus of the invention can be used to advantage in presses with conversion tools having multiple stages each with a plunger and die wherein the workpiece is transferred from one stage to the other.

Abstract: The invention describes a machine and a process whereby a material of unlimited length is continuously extruded into a tubular shape. Two annular toruses have their inner rims connected to rotating drive shafts by leaf springs. The exterior toroidal surfaces have suitable shaped grooves on them. The toruses are squeezed against each other radially by suitable means so as to cause a maximum radial deformation in each of them of a magnitude substantially greater than 0.2 percent but less than an amount that would cause permanent set in the torus material or the leaf springs. This deformation forms a contact length between the two toruses. A further requirement of the radial deformation on the two toruses is that the contact length between them be at least twice the extrusion length necessary for the contemplated extrusion. A bridge die supported by a die stem is located substantially at the center of the contact length.

Abstract: Machine for effecting bends of predetermined width and direction on the edges of a substantially-rectangular sheet of metal, comprises a combination of: a bending press having a C-form support structure carrying a lower bending counterblade, an upper, vertically displaceable blank-holder counterblade, and a pair of vertically displaceable bending blades having respective active parts lying in a common vertical plane substantially coplanar with a rear face of the blank holder counterblade; an iron hand including a vice supported on a carriage movable horizontally, perpendicular to the common vertical plane of the active portions of the bending blades, the lower jaw of the vice being rotatable about a vertical axis and the upper jaw being idle about a vertical axis and displaceable vertically to grasp a sheet to be bent between the jaws; and a positioning programmer, whereby, in use, a sheet of metal gripped by the vice is displaced by a value predetermined by the programmer into a position in which a first sid

Abstract: Apparatus for heat flattening and/or forming titanium sheet material under heat and pressure using thermoclamps fabricated of materials having different thermal expansion properties. Upper and lower dies are made of one alloy having a large thermal expansion while tie bars between the two dies are made of an alloy having low thermal expansion. During heat cycles, the difference in expansion causes the tie bars to close the gap between the dies and apply pressure to the titanium sheet between. In an alternate arrangement, the thermal clamping action coins a bead into a diaphragm to make a vacuum tight seal so that the atmospheric pressure in the oven produces the forming or flattening of the sheet.

Abstract: A mechanism for unloading a part which is retracted upwardly with a tool and which remains on the tool as the latter begins its downward stroke. The mechanism includes a tray which initially is moved into position to remove the part from the tool as the tool starts through its downward stroke. After removing the part, the tray catches the part and then shifts clear of the downwardly moving tool and discharges the part.

Abstract: A press, comprising a frame supporting an upper and lower bed for attachment of an upper and lower bolster, the upper and lower bolster each carrying mating halves of a complementary die, and the upper bolster having a knock-out opening therethrough, a hydraulic knock-out means carried by a drive means above the upper bolster that is adjustably electro-mechanically timed to cooperate with pins internal to the upper bolster to eject any work that may have remained in the upper die upon separation of the two mating die halves.

Abstract: An improved surgical device for applying a clip to a blood vessel or other body tissue, and including a novel clip stop for preventing rearward movement or displacement of the clip, is disclosed. The apparatus of the invention comprises an elongated plate-like or arm member that, in a preferred embodiment, includes means defining a pair of projections and a concave intermediate portion that prevents the rearward movement or displacement of the clip and which serves to cause the elongated plate or arm to be moved upwardly and out of the way upon the actuation of the clip applicator. The device of the invention is particularly suitable for use in combination with surgical clip applicators of the so-called magazine or cartridge type. A particularly advantageous and preferred embodiment includes a novel clip stop assembly of the invention in combination with the unique surgical applicator of U.S. patent application Ser. No. 843,063, now U.S. Pat. No. 4,152,920.

Abstract: Manually operated pincer mechanism for rapid shutoff of a pipeline that has developed a break or leak. The pincer mechanism is actuated by a manually operated hydraulic jack. The jaws are designed to shutoff small diameter steel pipe with the lower jaw in the upper position and with adapter members attached to both jaws with the lower jaw in the lower position is able to squeeze off plastic pipe up to a larger specified diameter. Removal of the plastic adapter jaws and with the lower jaw in the lower position permits booming down on patches for steel pipe up to a larger specified diameter for welding.

Abstract: Workpiece stop means for a sheet metal working machine comprising a holder for a plurality of stop members preferably in the form of strips of metal, the holder having a reference face, each of the stop members being of a respective accurately determined length and being engagable with the holder with one end of each of the stop members abutting the reference face of the holder, the stop members being sequentially presentable each for abutment of its other end with a co-operating abutment member mounted on a reciprocable carriage, which carriage also mounts a workpiece backstop of the machine, whereby, by such abutment of the abutment member with said other end of successive ones of the stop members, the carriage and thus the workpiece backstop is positioned at desired locations for successive operations of the machine, the holder being indexed parallel to the reference face thereof between successive abutments.

Abstract: A versatile method of phonon spectroscopy in which frequency crossing effects are utilized. A heat current is passed through a composite structure incorporating two bodies respectively containing different types of resonant phonon-scattering center. A varying external perturbation, suitably a magnetic field, is applied to the structure so as to affect the resonant frequency for only one of these types. The temperature difference between two points on the structure is monitored as the perturbation varies, this temperature difference exhibiting an excursion when the resonant frequencies for the two types of center coincide.

Abstract: An in-situ, thermocouple, soil hygrometer or psychrometer probe equipped with a removable, moisture pervious thermocouple shield, so that the thermocouple may be periodically cleaned for increased life and improved performance, has an elastic, protective boot that retains the shield in place about the thermocouple and permits easy removal of such shield. The boot is made of low-vapor sink material, so as not to interfere with proper operation of the thermocouple, and is configured to firmly grip the thermocouple mount, so that pulling of the thermocouple from its lead wires during removal and replacement of the shield is avoided.

Abstract: An apparatus for monitoring or controlling the temperature profile of a kiln or furnace is provided by utilizing a thermocouple array that generates an emf that is indicative of the temperature differential between a monitoring point or points and a chosen reference point in the furnace. The thermocouple array is structured so that an absolute temperature indication is provided at the chosen reference point and the other monitoring points are shown to be either higher or lower than the reference. The thermocouple array may be made in a wire and bead arrangement, or by thick film printing techniques. The EMF output of the array is multiplexed and applied to a CRT-type display wherein the degree of difference (either positive or negative) between each monitoring point and a reference is readily observed and can be easily compensated.

Abstract: Shield structure usable with a particulate matter sampler having a particle size cut-off inlet, comprises:(a) porous shield extending at least part way about said sampler inlet for reducing the velocity of gas flow reaching said inlet via the shield,(b) said shield forming openings that pass the air and particulate entrained in the air for flow at reduced velocity within an open interior zone defined by the shield means and adapted to receive said sampler inlet.

Abstract: An apparatus is described for withdrawing liquid samples from vials and injecting them into a chromatographic column or other analyzing device, which minimizes wastage, cross contamination, and dilution of the samples, and which can be automated with a minimum of complexity. The apparatus includes a sample loop for receiving a sample, and then delivering the sample by means of an injector valve into the flow stream of a chromatographic column, wherein an outer end of the loop is detachably connected to the valve by a loop end seal. The outer loop end can be lifted from the loop end seal and dipped into a vial, and a syringe connected via the valve to the inner loop end can be operated to draw sample liquid into the loop. The outer loop end then can be lifted from the vial and reinserted into the loop end seal, and upon operation of the valve the outer loop end is connected into the flow stream that is injected into the column to carry the sample to the column.

Abstract: A monitoring system comprises a sensor responsive to acceleration in a predetermined plane and an electronic circuit responsive to the sensor for indicating details of the acceleration. The sensor has a float structure immersed in liquid in a casing and mounted for pivotal movement when the sensor is subjected to acceleration in the predetermined plane. The float structure has a pair of spaced floats having centers of bouyancy above and one on each side of an axis of rotation for biassing the float structure to a datum position. Openings are provided in the float structure at different angular positions about the axis of rotation.

Abstract: The non-invasive testing of soft body tissue is accomplished with the use of a beam of ultrasonic energy which may be focused at varying depths in a patient. The energy content of the ultrasound beam is varied as a function of depth of focus to thereby employ the minimum energy required for proper resolution at the chosen examination depth. Signals commensurate with echoes received by a transducer having an array of coaxial annular electrodes thereon are combined in a manner which results in a good signal-to-noise ratio and minimum attenuation thereby improving the quality of the information derived from the examination procedure.

Abstract: A method for producing cross-sectional images using an ultrasonic imaging unit operating on the pulse-echo principle, which unit includes a transducer system having a stationary elongated array of adjacent transducer elements with transverse electrode segments adjacent one another on one side of the array. Successively and cyclically selected groups of adjacent elements are energized to produce an ultrasonic beam as a result of pulsed signals being applied to the corresponding electrode segments.

Abstract: A lens assembly exhibiting a certain fixed relative aperture is comprised of a physical acoustic lens having a given physical aperture and a fixed relatively short focal length serially spaced from an electronic acoustic lens having any selected one of a plurality of different relatively long focal lengths and simultaneously controlling the physical aperture of the electronic acoustic lens such that the relative aperture of the assembly as a whole remains fixed regardless of the selected one of the long focal lengths. Such a lens assembly is suitable for use in a pulse-echo ultrasonic-imaging system for imaging a deep structure.

Abstract: A pressure transducer comprises a bellows as the pressure sensing element and a variable inductance coil whose inductance is made to vary as a function of pressure sensed by the bellows. Motion is transmitted between the bellows and a plunger associated with the coil by means of a bent lever mechanism. The mechanical advantage of the bent lever is adjustable, after assembly of the transducer, to set the span to a desired value.

Abstract: An extensometer anchor for use in a mine borehole. The anchor has an anchor body that, when in an operative mode, is placed in the borehole. Extending at least partially around the outer surface of the body are one or more grooves whose major plane is generally perpendicular to the length of the borehole. Seated within each groove is a compressible resilient anchor member, like a ring, which remains loaded by a retaining device, such as a cotter pin, extending through it. Upon being pulled from outside of the borehole, the retaining device unloads the compressed anchor which then moves to expand outwardly in the borehole and firmly anchor the anchor body and attached extensometer within the mine borehole.

Abstract: A turbine meter for measuring flow rates of various fluids of different coefficients of viscosity. The turbine meter has an impeller including a cylindrical body and a plurality of vanes provided on the outer peripheral surface of the cylindrical body, a tube in which the impeller is rotatably supported, guide members disposed at the upstream side and downstream side of the impeller and adapted for guiding flow of fluid passing through the impeller, and means for permitting the adjustment of the axial distance between two cone members from the outside of the turbine meter.

Abstract: An illustrative embodiment of the invention provides an isolation flexure assembly for the control moment gyroscope of a spacecraft attitude control system for attenuation of vibratory disturbances therein, due to rotor static and dynamic unbalance and spin bearing radial forces. The isolation flexure assembly isolates the rotor, the main generator of the vibratory disturbances, from the spacecraft permitting ultraprecise pointing or precision torquing of the spacecraft.

Abstract: A system for propelling a vehicle which includes a frame within which at least one shuttle is mounted for reciprocal movement along a linear path of travel. An oscillating body is attached to the shuttle that is capable of delivering a series of alternating opposed force pulses to the shuttle with the pulses acting in a direction generally along the shuttle's path of travel. A rectifying means periodically locks the shuttle to the frame when the force pulses act in a first direction whereupon the forces are transmitted to the frame and unlock the shuttle when the forces act in the opposite direction, whereupon the shuttle is caused to move in the opposite direction. A return mechanism is operatively connected to the shuttle for restoring the shuttle to its original starting position after it has been driven a predetermined distance over the path of travel.

Abstract: A variable speed transmission of the friction-drive type comprises a driving shaft; at least two ball-driving elements; the driving shaft having drive means associated therewith for rotation of the ball-driving elements; first torque-transmitting means connected with the driving shaft and associated with the ball-driving elements for rotating the latter in unison with the drive shaft; first ball means comprising first cage means and at least two balls each of which balls is in rolling contact with the ball-driving elements; driven-shaft means comprising at least three driven shafts disposed parallel to one another; second ball means comprising second cage means and at least two balls each of which balls is in rolling contact with two of the three driven shafts; the gap between two adjacent ones of the three driven shafts being smaller than the diameter of the respective ball being in contact with these two adjacent driven shafts.

Abstract: A marine reversing gearing having a drive shaft, a forward clutch, a forward pinion coaxially arranged with respect to the drive shaft and capable of being coupled therewith by means of the forward clutch for forward travel. Two intermediate gears continuously mesh with the forward pinion, there also being provided two intermediate pinions which are rigidly connected with a respective one of the intermediate gears. A large gear continuously meshes with both intermediate pinions. There are also provided a reverse clutch and a rearward pinion which is coaxially arranged with respect to the drive shaft and can be coupled therewith by the reverse clutch for rearward travel, and two reversing pinions are driven by the rearward pinion. The intermediate gears meshing with the forward pinion exclusively transmit power as forward gears during the forward travel.

Abstract: A torsional vibration damper of the type having an inertia ring coupled to a hub by an elastomer member. The inertia ring is formed of two axially spaced ring parts. Each ring part carries an annular groove. A radially extending disc locking element (in the form of a flat washer) carries an axially extending key, the ends of the key being deformed towards a radially extending position by pushing the two ring parts together, the deformed key ends thus holding the two ring parts in assembly. The disc locking element also is compressed and thus exerts an axial force urging the two ring parts apart. In an embodiment, the disc locking element carries a second axially extending key, radially spaced from the first key and is similarly deformed into a second annular groove. In still another embodiment, one inertia ring part carries an integral, axially extending locking key. This key is received by a complementary annular groove in the other ring part, the disc locking element being optionally omitted.

Abstract: A hybrid transmission system for use in internal combustion engine vehicles provides two modes of vehicle operation. In the first or city mode, the vehicle is propelled by one or more reversible hydraulic motor/pumps which operate as a function of vehicle accelerator pedal displacement and of brake pedal displacement and which are driven by fluid pressure stored in an accumulator. In the second or highway mode, the vehicle is propelled by its internal combustion engine through a mechanical transmission.During the city mode operation, the accumulator is automatically and intermittently charged by a reversible hydraulic motor/pump driven by the internal combustion engine. Also, during the city mode, the internal combustion engine operates only during intermittent charging of the accumulator.

Abstract: A power transmission unit comprises a change-speed gearing having a mainshaft with change-speed gears and a countershaft with counter gears for selectively driving the respective change-speed gears, and a drive pinion shaft coaxially connected to the mainshaft and having a drive pinion driving a crown wheel, the drive pinion shaft being supported by a pair of axially spaced bearings carried on an upright partition wall in a trans-axle casing.

Abstract: A planetary transmission mechanism comprising two simple planetary gear sets driven by the engine of a vehicle through an input clutch or torque converter and having five friction engaging devices and two one-way engaging devices to establish four forward driving ratios and reverse through the transmission. A center output gear is mounted between the input clutch or torque converter and the planetary gear sets. The friction engaging devices comprising clutches associated with the planetary gear sets are mounted immediately adjacent the gear input elements which they connect. A pair of one-way devices are provided for various of the ratios which have a common outer race member.

Abstract: Planetary gears are cooperatively associated with a clutch and brake to provide reversing of a propeller driven by a unidirectional prime mover.

Abstract: A portable electric grinding tool for use in sharpening saw chains by means of a guide attachment attachably mounted at the sharpening end of the tool. The guide attachment consists of a detachable housing axially mounted on the tool having a separately detachable and reversible guide plate mounted parallel to the axial direction of the grinder rod displaced to either side of the axis of the grinder rod.

Abstract: An improved cutting tool has general utility, but is particularly adapted for use as a profile-style cutter, or as a form-relieved cutter. The cutting tool includes a body provided with a plurality of slots spaced circumferentially thereabout, a blade arranged in each slot, and a wedge inserted axially into each slot to securely mount the blade on the body. Each blade is provided with a pair of axially-spaced locating shoulders extending rearwardly from its trailing surface, and adapted to embrace the side faces of the body to prevent axial movement of the blade relative to the body. The wedge has a retaining lug extending forwardly beyond its leading surface, and adapted to be slidably inserted into a retaining groove provided in the body. The wedges and blades have cooperative compound tapered surfaces which are adapted to engage one another to cause the blade to seat against the slot base and trailing surfaces, and to prevent radial movement of the blade relative to the body.

Abstract: An elongated rigid tool having a handle at one end and a file contactor at the opposite end, having a total length greater than the width of the files to be manipulated and thickness permitting easy entry between tightly bunched files and manipulation of the files.

Abstract: A manually operable, portable, wire stripping device including a block member having a top platform surface and a knife blade projecting above said platform surface for receiving an insulated conductor transversely thereover, a plate member operatively connected to the block member for both longitudinal and vertical movement relative to the platform surface for the engagement and rolling of the insulated conductor longitudinally of the knife blade for circumferentially cutting the insulation around the conductor. A spring member is provided for biasing the plate member longitudinally to its inoperative position, and a cam track member is provided for restoring the plate member to an elevated attitude in its inoperative position.A manually operated cam mechanism is provided for adjusting the height of the knife blade relative to the platform surface to accommodate insulation sheathings of different thicknesses.

Abstract: A torque-limiting adapter for an elongated, insulative hot line clamp stick is provided which allows completely safe, accurate take-up of workpieces only to desired torque levels. The adapter preferably includes an elongated, tubular, axially rotatable head removably mounted onto the work end of a conventional clamp stick and housing a torque-limiting device; the input of the device is connected to the existing rotatable clamp stick, while the torque output of the device is connected to a manipulative tool, such as a pivotal hook. The tool is coupled to the head such that they rotate in unison until the desired torque level is reached, and is further coupled for axial shifting into and out of the head for safety purposes.

Abstract: An improved gear wrench which is particularly adapted for tightening or loosening nuts or bolts in tight places. The gear wrench comprises an elongated first member which carries at one of its ends a housing which rotatably receives a gear wheel therein. A tubular member is secured along its length to the first member and rotatably receives an elongated shaft which includes one end portion which extends beyond the corresponding end portion of the tubular member and is disposed proximate the gear wheel carried by the housing. A pinion gear is secured to this end portion of the shaft and includes teeth which mesh with the teeth of the gear wheel such that upon rotation of the shaft, a corresponding rotation is imparted to the gear wheel and a stud carried thereon which is adapted for receiving a suitable conventional socket. The teeth on the gear wheel and the surface of the gear wheel serve to define a recess which receives the end portion of the socket which is assembled on the stud.

Abstract: A fastening device including a bolt, screw or nut and a socket wrench therefor, each of the bolt, screw or nut and also the socket having polygonal surfaces one of which is greater in size and one of which is lesser in size, the greater such surface of the socket matching the greater surface of the bolt, screw or nut and the lesser such surface of the socket matching the lesser surface of the bolt, screw or nut.One feature is the provision of an auxiliary member which fits into the socket of the standard socket wrench, the auxiliary member providing the lesser polygonal surface for such socket.Another feature is the use of a round body or head having such greater or lesser polygonal surfaces.

Abstract: A process and apparatus for the continuous shearing of billets or bars of various shapes and sizes produced in a continuous casting plant wherein the shearing device moves in harmony with the billets is described. According to the process and as permitted by the apparatus, a first blade preferably the upper blade is caused to approach a billet and rest on it by means of hydraulic pressure working on cylinder/piston means, and thereafter a second blade positioned opposite the first blade is caused to move from supporting brackets to approach the billet and thereafter the blade caused to continue its course and cut into and shear the billet with the shears being supported substantially only by the billet during the shearing process. The device is relatively simple in design and is highly efficient.

Abstract: A frame supports an upper set of trim chutes movable toward and away from each other as well as a lower set of trim chutes movable toward and away from each other. The frame supports an upper web support member and a lower support member thereby defining two web paths. Each trim chute has a portion pivotable to an inoperative position wherein the extent to which each end portion projects in an upstream direction is decreased.

Abstract: For generating tones in an electronic musical instrument, there are provided multiple master frequency sources, a different source for each octave, differing in frequency from each other by a factor which differs from two by at least one semitone, each of which is coupled to a respective frequency synthesizer all of which have the same dividing ratios, to divide down the frequency of its master frequency source to pitches of the twelve notes in the intended octave. In one embodiment the sources are separate master clock pulse sources, and in another embodiment a pulse train derived from a single clock pulse source is applied to the frequency synthesizer for the highest octave, and the pulse train applied to each of the other synthesizers is derived from the pulse train supplied to the frequency synthesizer for the next highest octave by dividing the pulse repetition frequency thereof by a factor which differs from two by one or more semitones.

Abstract: An automatic rhythm generator for use in an electronic organ is made more efficient, from the standpoint of rhythm pattern storage, by use of a zero suppression technique. Null instructions, the sole function of which is to allow a clock interval to pass without sounding an audible beat, are eliminated entirely from storage, and thus do not consume any memory capacity. In order to skip the necessary silent clock intervals before the next audible beat, each beat instruction which is stored at a memory address may include an encoded skip instruction commanding a number of clock intervals to be skipped before passing on to the next beat instruction at the next memory address. Alternatively, the skip instruction, in a stored program instrument, may come from software. In either case, the skip instruction controls a programmable frequency divider, which causes clock interval skipping by dividing down the clock frequency to a lower rate before it reaches the memory address counter.

Abstract: A magnetic pickup assembly is mounted from a support member bridging across the drum housing. The support member preferably extends diametrically across the drum housing and has slot means or the like permitting the mounting of the pickup assembly at different positions along a radial locus of the drum housing. In a preferred version the support member is of laminated construction to reduce vibration. The pickup assembly, in addition to comprising a pickup coil also comprises a series of ferromagnetic members secured to the drum diaphragm and also disposed spacedly along the radial locus of the housing; the arrangement wherein the pickup coil is adjustable to one of a number of different positions for obtaining different tonal outputs from the instrument.

Abstract: A stringed musical instrument, in particular a double bass, having a resonating body of narrow elongate shape, a neck secured to this body and strings extending across the body and neck and across a bridge supported on the front plate of the body. A transverse sound-beam inside the body divides the latter into two separate resonating chambers of unequal size which are acoustically connected by a through-hole in the sound-beam. Below the bridge a bore extends through the body front plate and into the sound-beam to open into the connecting hole of the beam and an electrical pick-up element extends through this bore between the lower side of the bridge and a vibration plate mounted in the connecting hole.

Abstract: A plastics pull-type blind fastener has a pull-part with a pulling stem and legs which pass through holes in a workpiece, shoulders of the legs engaging the workpiece at the blind side, and a push-part with a head to engage the workpiece at the accessible side and a plug extending between the legs to keep them apart after setting. The legs are accommodated in complementary shaped apertures in the head of the push-part, and at least one part has teeth to lock the parts together after setting, and allow removal of the pulling stem.

Abstract: A fluid operated control device which co-operates with reciprocating means, such as a pneumatically driven shaft. The device includes a main cylinder and piston backed at each end by valves which each include auxiliary cylinders and pistons. The valves provide signal inlets and outlets which can be cross connected to cause continuous reciprocation of the main piston. Alternatively, the valves are operated to displace the main piston selectively or are connected to a delay to vary the timing sequence. Stroke adjustment is possible by a rod attached to one of the auxiliary valves. The main piston is mounted on a shaft passing through the other auxiliary valves.

Abstract: An actuator valve for an air driven reciprocating device wherein the valve includes a control rod responsive to movement of the reciprocating device and a valve piston pneumatically actuated by movement of the control rod. The valve piston selectively directs air to reciprocate the driven mechanism. The control rod includes a single axial passageway to selectively vent each end of the cylinder within which the valve piston operates.