Abstract: A cold plate comprising a container having an opening and being capable of holding a refrigerating medium. A heat conducting element positions over the opening in the container and is positioned to be in a heat conductive relationship with the refrigerating medium. A moisture seal prevents condensate from the object being cooled from reaching insulation within the container.

Abstract: The invention concerns a device for the cryo-substitution of small biological objects for microscopic, especially electron microscopic investigations, with a metal receptacle for the reception of at least one object, which is mounted in a dewar flask containing a liquid cryogen and which can be regulated to a desired temperature by means of the cryogen and a regulatable heating device joined to the receptacle.

Abstract: In a heat pump, thermoelements (20,22) are disposed in a thermopile (P1) and are electrically connected in series. Heat is transferred horizontally from the thermopile and vertical air ducts (28) at its sides by suitable arms (42) prolonging heat conductors inside the thermopile. The arms or webs serve to convey heat to heat exchange fins. Application to domestic heating.

Abstract: A chrysoberyl gemstone cut in a modified brilliant style is provided. The gemstone has seven rows of facets, including a girdle comprising rectangular facets. Each row contains eight, ten or twelve facets. The bottom row of facets is visible as a rosette pattern when the gemstone is viewed through the table.

Abstract: A new torque drive mechanism is disclosed between a reversible rotatable square bar means for rotating a washer while providing free longitudinal movement of the square rod in the washer, and for providing free passage of liquid therebetween the bar and the washer.

Abstract: Novel stitch bonded fleece fabrics are made on two bar machines with the front bar knitting pillar stitch and the back bar, with incomplete e.g. half set threading, traversing adjacent wales of the front bar, the tension of the back bar threads in relation to that of the front bar threads being such as to pull adjacent wales of the pillar stitches together. The back bar threads are alternately knitted and laid in, which results in large and small loops causing the fleece fibers to bunch into weftway fiber bundles. The combination of wales pulled together and the weft effect can simulate the appearance of a leno weave fabric.

Abstract: Novel stitch bonded fleece fabrics are made on two guide bar machines with the front bar knitting pillar stitch and the back bar with incomplete e.g. half set threading, traversing adjacent wales of the front bar and forming stitches in only one of said adjacent wales and having fewer stitches than courses. Stitches that have both front and back thread loops are made significantly smaller and tighter than stitches with front bar thread loops only, and this gives rise to a compact bunching of the fleece fibres giving a marked woven weft effect.

Abstract: A cedar chest lock remains unlocked unless positive actuation of a strike engaging member is effected. The lock includes a strike member projecting from the chest lid for cooperation with a locking latch plate retained in a housing mounted in the side wall of the chest. The housing thus has an opening for receipt of the strike member. A latch plate is pivotally mounted in the housing and is spring biased to a position which avoids engagement with the strike member upon insertion of the strike member through the housing opening. A push button in the housing may be actuated to engage and position the latch plate for cooperation with the strike member. Actuating the push button and subsequent positioning of the strike member through the opening in the latch housing permits the latch plate to engage the strike member thereby locking the chest lid in a closed position. The push button may include a key operated lock.

Abstract: A lock of the type having a plurality of locking bolts, having outer ends extending through openings in the door and inner ends located close to one another inside the door, and having a disc member, with arcuate slots and operating pins extending into the slots, and connecting with the inner ends of the bolts so that rotation of the disc in one direction will cause outward movement of the bolts, and rotation of the disc in the other direction will cause inward movement of the bolts, the lock having an operating lever swingably mounted adjacent the disc, and having one end swingable towards and away from it and connecting means between one end of the operating lever and a point on the disc spaced from its center of rotation, whereby swinging of the lever in one direction will be transmitted to the disc as a rotary movement in one direction, and swinging movement of the lever in the other direction will cause rotation of the disc in the other direction, and having means urging the lever in one direction, the l

Abstract: A key carrying device to fit comfortably in the pocket of a garment comprising a soft case, and enclosed thereby, a plurality of detachable and reattachable key holders having indicia thereon.

Abstract: A key retainer or the like of specific curvilinear configuration wherein a first upper portion is provided with a specific hook-like shape so as to permit ease of releasable and captive association with a belt loop, a belt, or pocket recess or trousers or the like, wherein keys may be satisfactorily contained on a lower portion of the retainer in a facile manner and in a manner that allows ease of access.

Abstract: A method and apparatus for straightening longitudinal curvature of a workpiece by a bending action involves supporting the workpiece between two supporting members, rotating the workpiece, engaging a plurality of sensors with the peripheral surface of the workpiece at longitudinally spaced-apart locations and generating with the sensors first periodic electric signals proportional to the apparent radius at the location of the sensors, whereby the signals are an indication of longitudinal curvature and of any deviation of the cross-sectional shape of the workpiece from a true circle, transforming the first signals into second electric signals the magnitude of which varies with the law of variation corresponding to the first harmonic of the development in Fourier's series of the first signals and the frequency of which equals the frequency of rotation of the workpiece, and applying bending forces to the workpiece in the sense of deforming the workpiece to minimize the amplitude of the second signals.

Abstract: An improvement to an apparatus for and method of making structures from at least one workpiece is disclosed. The prior art apparatus and method comprised a pair of dies which were clamped about the periphery of the at least one workpiece creating a gap therebetween. A pair of non-inflatable platens were then used to apply a force against the pair of dies further clamping the workpiece in place. The die assembly and workpiece were then heated to forming temperatures and thereafter the workpiece was formed within the pair of dies by fluid under pressure. Typically the forming was Superplastic Forming or Superplastic Forming/Diffusion Bonding. The improvement to the apparatus and method comprises producing an inflatable platen mounted between one of the dies and one of the non-inflatable platens, adapted to regulate the force applied by said pair of dies to said at least one workpiece.

Abstract: Metal pipe is planished by passing it longitudinally between two concentric circular arrays of independently rotatable planishing elements which are urged against the inner and outer surfaces of the pipe. The two circular arrays of planishing elements are radially aligned with each other on opposite sides of the pipe wall, and the pipe is rotated relative to the two arrays of planishing elements while the pipe is being passed therebetween.

Abstract: There is provided an apparatus and method for selectively coiling a hot steel transfer bar or allowing the bar to pass uncoiled through the apparatus. A frame supports a number of rollers which can transfer a bar in one direction, and conventional bend roller means are located above the rollers, adapted to apply a down curvature to a transfer bar. Pivotal ramp means upstream of the bend roller means can either direct a transfer bar through the bend roller means, or allow the transfer bar to pass along the rollers under the bend roller means. A sub-frame downstream of the bend roller means carries at least one roller, and is mounted for movement between a raised position and a lowered position. In the raised position, the roller on the sub-frame defines, with a further roller upstream thereof and with a coil-guide roller located under the bend roller means, a cradle in which the initial convolutions of a coiling transfer bar can be contained.

Abstract: A safety device for roll forming apparatus that has a pair of oppositely rotating pressure rollers with parallel axes and peripheral cylindrical surfaces which define between them a gripping and contact gap. The safety device comprises a pair of safety rollers located rearwardly of the pressure rollers and having peripheral portions spaced apart a distance greater than the gap between the pressure rollers and means for rotating the safety rollers in a rearward direction with respect to the pressure rollers in order to engage and reject foreign articles placed between the safety rollers.

Abstract: A method and apparatus are provided for the rolling of bars, rods or wire to avoid thickened ends in which a number of rolling stands are provided in tandem forming a rolling line and in which one or more of the last rolling stands in the line have separate drive means with means to regulate the speed independent of the other rolling stands to provide momentarily increased speed and tension on the two ends of the material being rolled.

Abstract: A carburetor is disclosed as being formed by die casting and in the process employing two opposed juxtaposed casting cores to form the induction passage and main venturi therein with the result that a flashing of die cast metal occurs as between the opposed juxtaposed cores generally transversely of the induction passage generally at the location of the throat of the venturi; after casting the carburetor, the carburetor is placed onto fixture means and a cutting and forming punch or tool is moved relative to the carburetor as to both cut through the said flashing and also seat against the metal of the upstream portion of the venturi in order to assure uniformity of contour thereof especially with respect to the venturi throat as cut and sized by the tool.

Abstract: A radial press for workpieces with cylindrical outer surfaces has a plurality of pressing jaws arranged in a circle for radial movement towards the axis of the workpiece outer surface. A pressure ring acts on the pressing jaws so that when the pressure ring is axial displaced, the jaws will open and close. Both the pressure ring and the pressing jaws each have two surface parts, having a wide setting angle and two surface parts having a narrow setting angle, wherein the surface parts having a wide setting angle are disposed firstly at the end faces and secondly between the surface parts having the narrow setting angle. In this way, when the pressing jaws are closed, the surface parts having the wide setting angle are deployed first, and then the surface parts having the narrow setting angle are deployed.

Abstract: A hollow end of a needle has an end of a suture crimped therein by crimping dies. A cam drives a table downward. The table pulls a spring which in turn pulls a guide and an adjusting screw which urges a block toward the table. One end of an arm is connected to the block, another end of the arm is connected to a pivot. A link at an intermediate position on the arm is connected to drive a ram against a movable die, driving the die to crimp the needle end. The ram carries a pressure means which urges the movable die toward the fixed die when the ram is not contacting the movable die so that the needle is held between the dies with a less-than-crimping force. The cam moves the table downward to apply the holding force and then moves the table further downward to apply the crimping force. When the adjusted crimping force is met, the spring stretches and allows the block to move away from the table to prevent excessive crimping force.

Abstract: An air-fuel ratio detecting system having a resistor device in series with an oxygen detector element with the electrical resistance thereof changing with the oxygen component of the exhaust gas from an automobile engine, wherein a constant voltage is applied to the series circuit, and by means of the voltage at the junction point of the oxygen detector element and the resistor device the air-fuel ratio of the mixture is detected.

Abstract: Apparatus for testing the contents of successive cells in a chain which transports arrays of cigarettes in or to a packing machine has a support for reciprocable sensing pins, each of which is caused to engage a discrete cigarette when the support is moved toward a cell. The pins are shifted relative to the support as the latter continues to move toward the array whereby the shanks, heads or collars of the pins at least partially seal openings which connect a pneumatic monitoring unit with the atmosphere. If all of the openings are properly sealed or nearly sealed, the array of cigarettes which are engaged by the pins contains a requisite number of articles and all of the cigarettes have satisfactory tobacco-containing ends.

Abstract: An apparatus for estimating the locality of a leaking spot in a pipeline which conveys a fluid, the apparatus comprising: a pair of detectors located on the pipeline at positions spaced from each other by a certain distance l and adapted to detect pressures P.sub.1 and P.sub.2 and pressure gradients .differential.P.sub.1 /.differential.x and .differential.P.sub.2 /.differential.x at the respective positions; and an operating unit adapted to calculate the locality of a leaking spot on the basis of the pressure gradients .differential.P.sub.1 /.differential.x and .differential.P.sub.2 /.differential.x and mean pressures P.sub.1 and P.sub.2 as obtained by memory-holding the pressures P.sub.1 and P.sub.2, by an operation of ##EQU1## wherein ##EQU2## E: estimated value x: distance from upstream detector to leaking spotn: pressure drop index number (n=1 for liquid, n=2 for isothermal gas and 1<n<2 for gas-liquid mixture which is determined experimentally depending upon the gas-liquid mixture ratio).

Abstract: A Y-ram tester for the testing of the blowout prevention apparatus of a gas or oil well. There is a well casing, a well casing segment mounted thereon, and a blowout preventer which has a pair of pipe rams and is mounted on the well casing segment. The rams are adapted to tightly seal around the two pipes. A test plug is mounted in the well casing in a manner so that the test plug would not move any further into the well casing. Two pipes extend through the center passage of the blowout preventer to a position past the pair of rams. There is also means for injecting water at high pressure into the cavity formed by the central passage of the blowout preventer below the pair of rams, the central passage of the well casing segment and the central passage of the casing of the well casing above the test plug.

Abstract: A method, apparatus and system for testing the integrity of a container sealed by means of a closure comprising a resilient sealing element and a cup-like cap having a top and a depending skirt compressing the sealing element over the discharge opening in the container. The invention consists in measuring the change in thickness of the resilient sealing element resulting from compression of the sealing element on the container and comparing the change in thickness or a value determined therefrom to a predetermined standard known to indicate sufficient compression to provide an acceptable seal. Resilient sealing element thickness is measured by apparatus including a sensing head having an anvil engageable with the closure mounted on an actuator member of a dial indicator. A face of the anvil engages the top of the cap along a circular line adjacent of the corner radius at its juncture to the top of the cap.

Abstract: Apparatus (11) for moving a member in accordance with a predetermined speed curve (1) having a plurality of sequential intervals (0-0', 1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8), including controlled devices (12, 14, 16, 18, 30, 34, 40, 44) for controlling the speed of the member and an automatic controller (10) to control the controlled devices to run the member as specified by the speed curve. Prior systems required a highly skilled operator to manipulate various controls to actuate the controlled devices (12, 14, 16, 18, 30, 34, 40, 44), but this has been eliminated through the use of the automatic controller (10). The apparatus (11) can principally be used to control the speed of an engine through a sequence of intervals to test, for example, for smoke emissions during certain of the intervals.

Abstract: The apparatus permits establishment of measuring values, yielding measuring values being representative of the material cross-section area solely of fiber slivers. A through-put duct converging, as seen, in the direction of transport of the fiber sliver is used into which two pressure measuring ducts merge at two measuring points at which the duct diameter is different. The two measuring ducts transmit measuring signals which are further processed in a division circuit means, which yields an output signal. The output signal is used for fiber sliver control or measuring purposes on machines processing fiber slivers or on spinning machines processing such fiber slivers further.

Abstract: A gas analyzer for determining the BTU or caloric content of a combustible gas uses a temperature measuring device for measuring the temperature of a metal cup which is heated by a flame produced by the combustion of the gas in an excess air environment. The supply of combustible gas is periodically turned off while the air supply flow is maintained to produce a periodic heating and cooling sequence of the metal cup during fixed respective time periods. A differential temperature monitor is arranged to monitor the temperature of the metal cup and the incoming fuel and air to produce a differential temperature signal during the heating and cooling sequence. In a second embodiment, the gas flame is continuously ignited and is supplied from a rotating gas jet in the excess air environment. The flame is sequentially applied to a series of metal cups to produce a heating and cooling sequence of each cup.

Abstract: This invention relates to a method of and apparatus for determining the calorific value of a sample of combustible material. The apparatus consists of a calorimeter bomb which is located in a temperature insulated enclosure and includes temperature sensors which are located in the wall of the bomb with electrical terminals for firing the bomb and monitoring the temperature changes in the wall of the bomb passing through the base of the bomb and enclosure for connection to a computer. The method consists in monitoring temperature changes in the wall of the bomb when it has been fired to burn a sample located in it by means of a computer.

Abstract: A flowmeter for gases and liquids utilized a semi-conductor body disposed in the gas or liquid, respectively, one end of the semi-conductor body being heated by means of an electric resistance wire such that at temperature difference, and thereby a voltage difference is realized between the ends of the semi-conductor body. The reduction of the temperature difference, and thereby of the voltage difference, varying with the flow rate is utilized for determining the flow rate. This is effected with the assistance of an amplifier across whose input the semi-conductor body is coupled-in and on whose output a signal representing the flow rate appears.

Abstract: A method and an apparatus for metering a flow of a liquid, such as a milk flow in a milking system. The liquid is passed into a metering or measuring chamber from which it is discharged in portions having substantially the same mass or weight, and the total number of liquid portions discharged is counted whereafter the total mass or weight of the liquid flow may be calculated on the basis of that count.The discharge operation is controlled by a float member arranged within the metering chamber and containing a magnet which may actuate reed switches positioned at different levels along the metering chamber. Each liquid portion is discharged from the metering chamber by exposing the chamber to a gas pressure substantially exceeding the pressure at the discharge end of a metering chamber outlet. The metering chamber is preferably partly defined by a bell-shaped valve body controlling the metering chamber inlet and being movable to its closed position under the influence of said gas pressure.

Abstract: An apparatus for checking the geometrical features of mechanical pieces, including a feeler adapted to contact the macrogeometric profile of the piece to be checked, a transducer coupled to the feeler for providing a reference signal and a non-contacting sensing device including a reactive type transducer for providing a signal responsive to the microgeometry of the piece. A parameter indicative of the roughness of the piece may be obtained by processing the signals provided by the transducer coupler to the feeler and by the other transducer.

Abstract: The invention discloses an elastic wave accelerometer for measuring acceleration at least in one direction.The device comprises a solid support, a seismic mass and a piezoelectric wafer embedded in the seismic mass and in the solid support. An acceleration in one direction in the plane of the wafer produces an extension in one portion of the wafer and a compression in the other. Elastic waves are excited in the two portions of the wafer. Two oscillators are obtained by means of amplifiers and the frequency difference between the two oscillators is proportional to the acceleration.The invention applies to accelerometers for inertial navigation.

Abstract: A meter for a liquid, such as water, comprises a measuring circuit (55) for measuring those measuring periods in response to a detection pulse sequence resulting from rotation of a body (30) rotated by the liquid, each of which may be defined either by a period of one complete rotation of the body or a predetermined interval, such as six seconds. The circuit produces measurement signals representative of individual amounts of the liquid used with the individual amounts accompanied by detection errors resulting from a variable flow rate of the liquid. A totalizing circuit (61), which may comprise an ROM or consist of a microcomputer, totalizes the individual amounts with the detection errors reduced.

Abstract: In an exemplary embodiment, an ultrasonic scanning apparatus has an articulated support for at least one scan head and angle indicators for determining point- and/or direction-coordinates of the scanning. An angle detection and processing is desired which is considerably simplified as compared with the state of the art but which is nevertheless highly precise, interference-insensitive and cost-economical.

Abstract: A carrier for a plurality of transducers is disclosed. The carrier is useful in ultrasonic testing of furnace tubes. The carrier includes provision for positioning a plurality of transducers against the interior of the tubes.

Abstract: A differential pressure transducer having a cantilever and a semiconductor strain gauge attached to each side of the cantilever at an intermediate portion of the latter. The cantilever has one end fixed by electron beam welding to a fixing member and the other end left for free displacement in response to a differential pressure. The displacement of the other end of the cantilever is detected as changes in the electric resistances of the semiconductor strain gauges.

Abstract: A fullscale setting device for a magnetic flowmeter or the like receives a frequency encoded input and divides it by a mixed number having an integral part and a fractional part to produce an output. The mixed number may represent a flow rate which is taken as the fullscale setting, thereby making the fullscale setting independent of the calibration of the flowmeter.

Abstract: A magnetic transducer fits over a rotatable shaft and has a primary winding that is a-c energized by an a-c excitation signal to produce a magnetic field, adjacent to the shaft, which changes as the shaft is torsionally stressed when torque is applied thereto. This stressing causes compression and tension in the shaft which alter the shaft permeability and thus vary the magnetic flux pattern in the shaft. The magnetic field is also a function of the shaft speed due to the shaft's armature reaction, eddy currents being generated in the shaft which develop a magnetic field that opposes and distorts the field produced by the primary winding. A pair of secondary windings in the transducer produce differently modulated excitation signals which are then processed to provide a pair of suppressed carrier signals amplitude modulated at different phases by the torque and speed parameters of the shaft.

Abstract: An improved pump jack assembly for reciprocating a sucker rod in a well bore is disclosed. The pump jack assembly includes a walking beam pivotally mounted for free swinging motion on a Sampson post. The walking beam includes a fixed counterweight mounted on one end and a horsehead mounted on the opposite end. The walking beam is driven in up-and-down pumping motion by a pair of balance weights which are coupled for coordinated reciprocal movement along the walking beam. The balance weights are linked together for concurrent movement and are driven by a hydraulic cylinder mounted on the counterweight end of the walking beam. The weights are so positioned that while one weight is being raised by the hydraulic cylinder, the other weight is falling due to gravity. Thus the weights help each other and greatly reduce the power requirement. The downward stroke of each end of the walking beam is limited by saddle weights which are pivotally coupled to the walking beam on opposite sides of the Sampson post.

Abstract: A low cost multi-directional movement cam controlled mechanical positioning apparatus is described for automatically tracing out the path of movement for the working head of a machine tool or the like. The apparatus may be embodied in a single machine providing for three-dimensional movement of the working head with or without additional controlled movement of the working head in either pitch, roll or yaw. Alternatively, the apparatus can be employed to provide additional degrees of movement either along a z-axis and/or in either pitch, roll or yaw to the working head of a two-dimensional automatic machine tool or conventional construction. The apparatus comprises a set of at least three relatively large diameter, disk-type, control-drive cams rotatably supported on a base member for controlling movement of the working head of a machine tool or the like within a plane defined by complementary axes of movement (such as the x-y axes) and along at least one additional degree of movement.

Abstract: Improvements to devices for the remote control of a rearview mirror, adjustable from inside a vehicle, by means of a cable transmission.The body 1 is provided with two bearings inside which is pivotally mounted an axis integral with a crosspiece which carries one end of at least a cable, the said crosspiece having at least one bearing inside which is pivotally mounted an operating lever the axis of which is perpendicular to the pivoting axis of the crosspiece, the said lever being fast in rotation with a pivoting member on which are mounted the ends of two transmission cables.The invention is used for remotely controlling vehicle rearview mirrors.

Abstract: Apparatus is disclosed for securing a wheel and shaft which comprises a collar rigidly mounted to the shaft having an annular peripheral surface formed with radially spaced recesses, and a ring having an annular inner surface formed with radially spaced projections keyed for removable placement within the collar recesses. The apparatus further comprises means for releasibly coupling the ring with the wheel when positioned about the collar.

Abstract: A three-mode, hydromechanical transmission including a pair of hydraulic displacement units forming a hydrostatic transmission and having a first, low-speed hydrostatic mode and a second and third intermediate and high speed hydromechanical modes. In one embodiment, a pair of planetary gear sets are related to form a four-element differential and are associated with an input shaft and the hydrostatic transmission and brake and clutch means. The hydrostatic transmission drives an output shaft through a connection to one of the planetary gear sets, with the brake means engaged. A first clutch means in a drive train from the input shaft to one planetary gear set effects the second mode of operation with the brake disengaged and a second clutch means in a parallel drive train to another element of the planetary gear sets effects the third mode of operation, with the brake and first clutch means disengaged.

Abstract: A handle assembly for attaching a decorative handle to a turning stem is disclosed. In one embodiment, a stem cap having outer and inner spline surfaces, a stop surface, and carrying surface is placed over a turning stem, and the stem cap is secured to the turning stem using an attachment screw. A handle knob having interior mating splines is then brought down upon the top of the stem cap and an assembly ring is brought up from under the stem cap thereby sandwiching the stem cap. The handle knob and assembly ring are then connected, thereby completing the construction.

Abstract: In a hydraulic control system for an automatic power transmission for an automotive vehicle, a line pressure booster valve is provided to boost the line pressure to be developed by the pressure regulator valve of the control system when a downshift is to be made from the highest one of the gear ratios in the automatic forward drive range to the higher one of the gear ratios in a manual forward drive range of the transmission system.

Abstract: A screw cap remover having an elongated handle, a first semicircular jaw secured to a first end of the handle, and a second semicircular jaw axially slidable along the handle. A tubular sleeve slides along the elongated handle and has the second jaw secured at a first end thereof. The second end of the sleeve is adapted to abut against a rotatable cam member, the rotation of which axially displaces the tubular member and thus, the second jaw, toward the first jaw. The rotatable cam member is adapted to be positioned at several discrete positions along the elongated handle and the jaws are detachably secured to the handle so that jaws of a size corresponding to the size of the screw cap can be easily installed or replaced.

Abstract: Apparatus which can be utilized on a drilling rig to aid in rotating drill pipe sections to connect and disconnect them, which uses a cat's head chain device to rotate the pipes but which avoids the danger arising when workmen wrap the chain around a pipe. The apparatus includes a jaw assembly which can be installed around a pipe section, and which has teeth on its inner surface to engage the pipe and sprockets on its outside to engage the cat's head chain so the chain can turn the jaw assembly. A stationary frame surrounds the jaw assembly while permitting it to rotate therewithin, the frame also carrying a backup roller to keep the chain engaged with the sprockets of the jaw assembly.

Abstract: A machine tool, particularly a lathe, milling machine or boring machine, having a machine bed on which a slide and/or tailstock is displaceably guided by means of at least one prism-shaped guideway. The guideway is formed by a guide bar which, as seen in cross-section has guide surfaces lying in pairs parallel to and opposite each other and which guide bar on a part of two adjacent of the guide surfaces is fastened in a prismatic recess in a machine bed. The slide or tailstock is displaceably supported on the guide bar via prismatic travel surfaces by means of the two other guide surfaces. A guide gib which is removably fastened to the slide or tailstock acts on the free part of the two adjacent guide surfaces serving for the attachment.

Abstract: A tool insert for boring operations, particularly for a boring bar, comprising a housing which can be inserted in a recess in a toolholder, for example the boring bar, and which has a cutting tip support slidably mounted in a longitudinal bore therein, the said cutting tip support having a cylindrical shank, the outer end of the support bearing in a recess a replaceable cutting tip which is staggered laterally relative to the shank axis and the rear end having a thread which is engaged by the thread of an adjusting element rotatably mounted free of play in the housing between axially loaded ball bearings.