Abstract: A method and apparatus for monitoring a temperature difference between two regions within a cavitation system is provided. The system's cavitation chamber is partially or completely filled with cavitation fluid, the amount that the system is filled controlling whether a cavitation fluid free surface is formed within the cavitation chamber or a conduit coupled to the chamber. Regardless of whether the region of the system above the cavitation fluid free surface is within the chamber or within the conduit, a temperature difference is created between this region and the cavitation fluid within the cavitation chamber. The temperature difference between these two regions is monitored by monitoring the temperature of each region. The temperature difference can be created by either heating the region above the cavitation fluid free surface, cooling the cavitation fluid, or both.

Abstract: Subsurface defects in a processed metal are detected by a laser-ultrasonic method involving generation of a surface acoustic wave at one location on the processed metal surface, and detection of a scattered acoustic wave at another location on the processed metal surface. The method can be used in-line to provide real time monitoring of laser cladding and other metal processing operations.

Abstract: A digital reordering unit, an ultrasonic front-end device and operating method thereof are provided. The ultrasonic front-end device for use in an ultrasonic system, compatible with P types of reception channels, where P is an integer larger than or equal to 1; the ultrasonic front-end device being connected between a probe and a detector of the ultrasonic system and controlled by a primary controller of the ultrasonic system; the probe having M array elements, where M is an integer larger than or equal to 1, the ultrasonic front-end device having an ultrasonic transmission part and an ultrasonic reception part, wherein the ultrasonic transmission part comprises a transmission beamformer and M transmission driving units, and has M transmission channels; the ultrasonic reception part comprises M high-voltage isolation circuits, RC amplifiers, RC ADCs and a beamformer electrically connected in said order and has RC reception channels, where RC=[N,2N,3N . . .

Abstract: The invention relates to a vibrating sensor with a diaphragm (2) that can be set into vibration; and with a transformer device (4) for setting the diaphragm (2) into vibration and/or for tapping a vibration S in the diaphragm; and with a vibrating body (3) and/or a diaphragm (2) in the form of a vibrating body, for transmitting the vibrations (S) of the diaphragm (2) to an ambient space (7) and/or for transmitting the vibrations (S) from an ambient space (7) to the diaphragm (2). The transformer device (4) exhibits a coil (8) and a bolt (6), such that the bolt (6) is connected to the diaphragm (2) in order to transmit the vibrations (S) to or from the diaphragm (2), and the coil (8) and the bolt (6) are positioned to so interact that a vibration (S) in the bolt (6) induces a flow of current in the coil (8) and/or a flow of current in the coil induces a magnetic field (B) and brings about a vibration in the bolt (6).

Abstract: A method and apparatus for improving accuracy of measurement of fluid pressure at a fluid port, such as at a supply port or control port of a fluid control valve, involves a closed-loop precision pressure measurement method with barometric pressure and temperature compensation.

Abstract: A process transmitter includes a hydraulic system with a fill fluid for transmitting pressure from a process fluid to a pressure sensor. The fill fluid contains hydraulic fluid and a self-activating stop-leak composition for preventing loss of fill fluid caused by leaks in the hydraulic system.

Abstract: A capacitive pressure sensor includes a substrate assembly having a conductive layer. A conductive membrane is mounted to the substrate assembly so that a sealed reference chamber is defined by the conductive membrane and the substrate assembly. A cap is arranged on the substrate assembly and defines one or more apertures so that an antechamber is defined between the cap and the conductive membrane. Differential pressure between the reference chamber and antechamber can cause deflection of the conductive membrane which, in turn, varies the capacitance between the conductive membrane and the conductive layer.

Abstract: System and apparatus for measuring pressure comprising a microelectronic device, an interface member attached to the microelectronic device, a pressure sensor having a diaphragm responsive to external pressure exerted upon the diaphragm, wherein the interface member is positioned between the microelectronic device and the pressure sensor and is attached to the pressure sensor providing a first cavity between the pressure sensor diaphragm and the interface member and wherein the pressure in the first cavity is set at an initial predetermined pressure.

Abstract: The present invention provides a pressure sensor. The pressure sensor comprises a substrate with several support structures attached to the substrate. The pressure sensor further includes a strut structure integrated with a heating element. The strut structure is engaged with the support structures so as to create an air gap between the heating element and the substrate. The heating element has an electrical resistance proportional to changes in air pressure in the air gap.

Abstract: A connecting element (1) for the releasable sealed connection of a fluid line system to a pressure transducer (2) for detecting positive and negative pressures of a fluid located in the connecting element (1) is described, comprising a housing (3), at least one fluid line connection (4a, 4b) to the housing (3), a measuring chamber (5) in the housing (3), which measuring chamber (5) communicates with the fluid line connection (4a, 4b), a diaphragm (8) adjacent to the measuring chamber (5), which diaphragm (8) is tightly connected to the housing (3) for sealing the measuring chamber (5), and a connecting section (9) on the housing (3) for the repeatedly releasable connection of the connecting element (1) to a pressure transducer (2).

Abstract: An object comprising a body part having an electrically insulating outer surface part, and a first layer arranged on the outer surface part. The first layer is formed by one or more electrically conducting materials and defines one or more conducting paths between a first area of the outer surface part and a second area of the outer surface part. Thereby electrical signals may be transferred between the first and second area parts. The layer further defines a sensing device, which is thereby embedded into the object. The object is provided with a threaded portion defining an outer thread. Thereby the object may easily be fitted into an opening having a mating inner thread. The object may be in the form of an ordinary bolt with a sensing device embedded in a surface part thereof.

Abstract: A system monitors dynamic forces between bearing surfaces. Based on sensed data, the system may model the forces on the bearing surfaces, analyze these forces, store data relating to these forces, and/or transmit data to an external data gathering device. The system includes a first body piece and a second body piece which mate together. The first and second body pieces comprise bearing surfaces that contact a material that may exert a force. A protrusion, such as a pole, post, or beam, extends from first body piece's bearing surface. At least one sensor is disposed on a pole. The at least one sensor detects a mechanical motion of the pole resulting from a force imposed on the body pieces, and generates data indicative of this force. A computer communicates with the at least one sensor and processes the sensed and/or modeled data.

Abstract: An electromagnetic flowmeter includes a measuring tube (1) through which a fluid to be measured flows, electrodes (2a, 2b) which are placed in this measuring tube and detect an electromotive force generated by a magnetic field applied to the fluid and the flow of the fluid, an exciting coil (3) and power supply unit (4) which apply a time-changing magnetic field to the fluid, a signal conversion unit (5) which extracts a ?A/?t component from the resultant electromotive force of the electromotive force based on the ?A/?t component irrelevant to the flow velocity of the fluid and the electromotive force based on a v×B component originating from the flow velocity of the fluid, which are detected by the electrodes (2a, 2b), and a flow rate output unit (6) which extracts only the v×B component by removing the extracted ?A/?t component from the resultant electromotive force, and calculates the flow rate of the fluid based on the v×B component.

Abstract: A magnetic flow metering device and method is disclosed for the measurement of corrosive flow streams. The device utilizes a unibody construction wherein the flow conduit is constructed entirely from an insulative, non-conducting material without resorting to a metallic outer housing. The portions of the electrodes in contact with the flow stream are made of a suitable conductive polymer material, resistant to the corrosive media. The electrodes also feature shields that are molded into the electrode assembly to reduce background electrical noise. The invention also utilizes an electrical configuration that actively drives the electrode shield circuit (electrodes as well as cabling) to provide a more accurate measurement of the electromotive force.

Abstract: The measuring transducer includes at least one measuring tube communicating with a line connected during operation for conveying a medium to be measured, and a support element oscillatably holding the at least one measuring tube. Additionally, it is provided that the support element contains at least two passageways, via which the at least one measuring tube communicates with the line, and that the at least one measuring tube is affixed, especially releasably, at at least one end to the support element by means of a screwed-fitting at one of the passageways. Alternatively or in supplementation thereof, it is further provided that the at least one measuring tube is, at least in part, made of cold-strengthened, for instance cold-stretched or autofrettaged, material.

Abstract: The measuring transducer includes at least one measuring tube communicating with a line connected during operation for conveying a medium to be measured, and a support element oscillatably holding the at least one measuring tube. Additionally, it is provided that the support element contains at least two passageways, via which the at least one measuring tube communicates with the line, and that the at least one measuring tube is affixed, especially releasably, at at least one end to the support element by means of a screwed-fitting at one of the passageways. Alternatively or in supplementation thereof, it is further provided that the at least one measuring tube is, at least in part, made of cold-strengthened, for instance cold-stretched or autofrettaged, material.

Abstract: The measuring transducer includes at least one measuring tube communicating with a line connected during operation for conveying a medium to be measured, and a support element oscillatably holding the at least one measuring tube. Additionally, it is provided that the support element contains at least two passageways, via which the at least one measuring tube communicates with the line, and that the at least one measuring tube is affixed, especially releasably, at at least one end to the support element by means of a screwed-fitting at one of the passageways. Alternatively or in supplementation thereof, it is further provided that the at least one measuring tube is, at least in part, made of cold-strengthened, for instance cold-stretched or autofrettaged, material.

Abstract: A control circuit for scanning a pressure or force responsive sensor array is disclosed. Pressure or force sensors formed of an array of pressure or force responsive sensor elements can be used to acquire pressure or force measurements in response to an applied load. The control circuit can sample signals from the sensor elements to detect the pressure or force at one or more sensor elements of the sensor array. The circuit herein may provide for relatively faster scan rates. A user may define a subset or subsets of sensor elements of the sensor array to be scanned. Various methods and related circuitry for adjusting for sensor characteristics are also disclosed.

Abstract: An adjustable spanner with electronic strain gauge function which comprises a head; an retaining jaw extending from the head; and sliding groove being transversally formed at one upper side of the head; a handle connected to a lower side of the head; at least one strain gauge; a hollow connecting tube having one end connected to the handle; the hollow connecting tube being installed with an output display device; a clamping surface of the moveable jaw and a clamping surface of the retaining jaw being formed as a working area for clamping a screw device; and a positioning portion being installed on the moveable jaw and at a non-working area below the work area; the position portion facing toward a clamping opening between the clamping surfaces of the moveable jaw and retaining jaw; and the positioning portion being capable of resisting against the screw device.

Abstract: A semiconductor force sensor capable of preventing a diaphragm part from being broken and accurately measuring a force applied thereto in a direction orthogonal to the diaphragm part, wherein a force transmitting device for applying a measured force to the diaphragm part of a semiconductor force sensor element is formed of a sphere having a rigidity, and a through hole passing through an opposed wall part toward the diaphragm is formed in the opposed wall parts at a position opposed to the center part of the diaphragm part so that a part of the sphere can face the outside of the opposed wall part and stores a part of the remaining part of the sphere to allow the sphere to be moved only in a direction orthogonal to the diaphragm part and rotated on the center part of the diaphragm part.

Abstract: A roller and a four way roller assembly is disclosed. The roller includes an axle, a wheel, and at least a flexible connecting portion. The flexible portion connects to the axle and the wheel, thereby the axle moves in the wheel. The four way roller assembly includes a base, a roller container and a roller. The roller container is movably installed on the base. The roller rotates in the roller container via the axle. The axle presses a first sensor on the base.

Abstract: A climate chamber, which is in particular suitable for chemical and/or biological samples, comprises a climate compartments defined by a housing. Inside the climate compartments an analysis device, such as a microscope, is at least partially arranged. Further, the housing comprises an inlet opening for supplying a conditioning medium flow. For preventing condensation at condensate-sensitive components the medium flow is directed such that it at least partially flows against the analysis device and/or the sample carrier.

Abstract: An engine starter includes a unidirectional rotation clutch system with a clutch outer having an outer-diameter side cylinder portion, a clutch inner having an inner-diameter side cylinder portion, long shaft-shaped clutch rollers that are long in a drive shaft direction and are installed in wedge spaces formed between the inner and outer-diameter side cylinder portions, and springs that urge the clutch rollers toward wedge portions, wherein at least one of the inner and outer-diameter side cylinder portions includes a wear preventive portion that prevents wearing of the clutch rollers that have turned so as to be in an inclined posture with respect to the drive shaft.

Abstract: A rotary button device comprises a panel having a receiving room; the receiving room having a flange; the flange being installed with a stop; a rotary shaft protruding from a center portion of the receiving room; a positioning rod transversally passing through the rotary shaft; a button installed in the receiving room; a post protruding from the button; the post having an insertion hole for receiving the rotary shaft and the positioning rod of the panel; a lower side of the button being installed with a block; and a metal ring being installed on the post of the button. The metal ring has a shape identical to that of the post.

Abstract: A hollow yoke is inserted into a bore section of a frame. The yoke is connected to a slider via a slit in the frame. A timing belt is inserted into a belt hole of the yoke. Further, a pair of guide members are provided on both side surfaces of the yoke, which engage with guide grooves of the frame. The yoke is displaced along the guide grooves by the timing belt, under a driving action of a driving section. Accordingly, the slider is displaced in the axial direction along the frame.

Abstract: A Kabuki device to positionally maintain and release a stage setting responsive to electric current from a power source. A box-like body, defining a medial chamber with a slot communicating therewith, carries a solenoid in the chamber. A movable solenoid arm communicates with a spring biased lever arm that pivots on an offset axle to provide mechanical advantage to one end of the solenoid arm. One metal ring interconnected to the stage setting is inserted through the slot and is positionally maintained by a ring support pin carried by the pivoting lever arm. A finger hole defined in one end of the body allows manual manipulation of the lever arm for resetting. Jumper cables having plural electrical leads allow a plurality of devices to be interconnected in series in multiple predetermined groupings.

Abstract: In a transmission for a motor vehicle of a reduction gearing design with power branching including a main shaft and a counter shaft, a first component transmission and a planetary gear unit, power is branched to the countershaft by the first component transmission in certain gears and recombined via the planetary gear unit and a direct power transmission path is provided wherein the countershaft is decoupled selectively by means of a control device.

Abstract: The disclosed gear bearing systems generally include first and second gear bearings having gear teeth, wherein the gear bearings are coupled together axially and the alignment and position of the gear bearings may be set substantially independently of the alignment and position of their gear teeth.

Abstract: A drive unit for a twin-screw machine, of which the screw shafts, which can be driven in rotation in the same direction, have an axial spacing a, has two output shafts. The output shafts are provided with a respective crown gear which does not collide with the adjacent output shaft. The drive motor provided is in the form of a torque motor having a stator housing, a rotor, which is rotatably arranged in the stator housing, and at both ends of the rotor, outside the stator housing, a drive pinion meshing with a crown gear.

Abstract: A shifter mechanism includes, a base, a shifter lever pivotable relative to the base along a shift path, and a detent assembly. The detent assembly includes a plurality of grooves defining a plurality of gear positions along the shift path, an electric linear actuator having a pin selectively movable along a linear path between a locking position wherein the pin cooperates with the plurality grooves to lock the shifter lever in one of the plurality of gear positions and an unlocking position wherein the shifter lever is movable along the shift path between the plurality of gear positions, and an electric switch operably coupled to the electric linear actuator to selectively activate the linear actuator. The pin of the linear actuator is extendable along a linear path which is substantially vertical or a along a linear path which is substantially horizontal and laterally-extending.

Abstract: To realize a structure which can obtain at low cost, a structure with a high level of freedom of design, a collapse load which can be stabilized, and which can maintain flexural rigidity, engaging portions 14 having interference are provided at two location around the circumferential direction in an overlap portion 13 of an outer column 11 and an inner column 12. Moreover, the position of the overlap portion 13 and a bracket 16 for supporting a steering column 3 on a vehicle is matched in relation to the axial direction. Furthermore a welding part of the bracket 16 and the outer column 11 is positioned separated from the engaging portions 14.

Abstract: A process is provided which includes the steps of providing a rigid strip of material, forming projections along a side of the rigid strip, and shaping the rigid strip with a mandrel to form a shaped piece. The process also includes shaping the projections to form a substantially closed end of the shaped piece. Also provided herein is a bearing assembly that includes a composite material comprising a metal substrate having a substantially cylindrical shape and a polymer layer overlying the metal substrate and disposed on an inner surface of the cylindrical shape. The bearing assembly also includes a closed end including a plurality of folded projections to form a closed end.

Abstract: A parking brake actuator includes a support bracket, a lever supported by the support bracket and pivotable between a brake-released position and a brake-applied position, a push-to-release lock mechanism operably connecting the lever and the support bracket to selectively lock the lever in the brake-applied position, and a self adjust mechanism having a cable connection and a sector member pivotable relative to the lever, a spring member resiliently biasing the cable connection in one direction, and a pawl secured to the lever and movable between a first position wherein the pawl engages the sector member to prevent pivoting motion of the cable connection relative to the lever and a second position wherein the pawl releases the sector member. The pawl is resiliently biased to the first position and the pawl engages an abutment when the lever is in the brake-released position to move the pawl to the second position.

Abstract: A pedal bracket (3) affixed to a dash panel (1) pivotably supports a pedal unit (2) via a first pivot shaft (13) and a pivotable lever (5) via a second pivot shaft (17). A shaft retainer (51) prevents a downward displacement of the first pivot shaft (17) under normal conditions, whereas the pivotable lever (5) goes into contact with a side member (33) of a vehicle body and pivots on the second pivot shaft (17) in a specific direction in the event of a vehicle collision, thereby thrusting and displacing the first pivot shaft (13) downward and disengaging the pedal unit (2) from the pedal bracket (3). At this time, the shaft retainer (51) draws back from underneath the first pivot shaft (13), for instance, as a result of pivoting of the pivotable lever (5) and goes into a nonrestrictive state in which the shaft retainer (51) allows a displacement of the first pivot shaft (13).

Abstract: An electronically controlled pedal with hysteresis and kickdown includes a housing having a friction wall with a first frictional surface having a first radius of curvature, a second frictional surface having a second radius of curvature, and a step transitioning between the two. A hysteresis and kickdown generating means is pivotally attached to the upper pedal arm. A spring biases the generating means against the housing. Application of a first pedal load to the pedal arm generates a first hysteresis force between the hysteresis and kickdown generating means and the first frictional surface. Application of a second pedal load to the pedal arm generates a frictional kickdown force between the generating means and the step, and application of a third pedal load generates a second hysteresis force between the generating means and the second frictional surface. The first hysteresis force, kickdown force and second hysteresis force are transmitted back to the operator.

Abstract: Method and device for selecting a driving program in motor vehicles having an automatic transmission, in which at least two different driving programs, in particular an economy mode and a sport mode, can be selected by the driver. The driving program selection according to the invention is made here by briefly tipping the selector lever laterally and releasing it again. For this purpose, the selector lever is pressed briefly to the side counter to a spring force, i.e. transversely with respect to the direction of movement within the shifting gate alley, suitable means, such as position sensors or force sensors, respectively generating corresponding signals both when the selector lever is tipped and when it is released again, and said signals are analyzed in a control unit such as the transmission controller or a central vehicle electronic system in terms of their time interval, and as a result trigger a driving program changeover by means of the control unit.

Abstract: A mode of the invention is the device which installs a solenoid near the shift lever, and operates an electric switch with it when the back support topples over back and by it the shift lever locks with the mobile object of the solenoid overhanging. To control a solenoid, it communicates it using the electric wiring or the remote control.

Abstract: A cam thrust assembly that includes at least one rotatable cam plate and at least one roller retaining recess defined in the cam plate. The roller retaining recess has an inner radius and an outer radius and defines a ramp surface having a shallow portion and a deep portion. The cam thrust assembly further includes a tapered roller positioned in the roller retaining recess on the ramp surface for movement along the ramp surface. At least a portion of the ramp surface is curved between the shallow portion and the deep portion in the direction of the roller travel.

Abstract: A pedal propulsion mechanism has a first crank arm mechanically connecting to a first gear set and a drive wheel. A second crank arm mechanically connects to a second gear set and the drive wheel. On a first crank arm power stroke the first crank arm drives the drive wheel and first gear set driving a second gear set driving the second crank arm. The first and second gear set have a gear ratio so that on a first crank arm power stroke the first crank arm drives the drive wheel and also drives the first gear set that drives a second gear set that drives the second crank arm at a rotational speed different than that of the first crank arm.

Abstract: A wiper motor which can prevent an impact force from greatly acting on attaching parts is provided. A gear cover formed in a substantially T-plate shape is fastened to an opening of a gear case of the wiper motor used in a rear wiper device so as to cover a worm reduction gear and a crank device. A first attaching part and a second attaching part are formed at both end portions of a first band-shaped part of a T-shaped longitudinal member of the gear cover so as to have a relation to sandwich a wiper shaft therebetween. A third attaching part is formed at a tip portion of a second band-shaped part crossing the first band-shaped part in a T shape so as to have a relation to sandwich a rotation axis of an electric motor therebetween and face the second attaching part. A gravity center of the motor part and the gear part is arranged within an area of a triangle formed by the first attaching part, the second attaching part, and the third attaching part.

Abstract: A gearbox device for a motor vehicle includes a box housing formed with a window, and an ultimate drive shaft extending through the box housing. A speed change gearing is disposed within the box housing, and includes a bevel gear set disposed in proximity to the window. The bevel gear set includes a driving bevel gear driven by a crankshaft, and a driven bevel gear sleeved removably on the ultimate drive shaft and meshing with the driving bevel gear. A removable cover is connected removably to the box housing for covering the window, and is removable from the box housing so that the bevel gear set is exposed within the window, thereby allowing for access to the bevel gear set via the window and, thus, adjustment, maintenance, repair, and replacement of the bevel gear set.

Abstract: A clamping device for clamping a rotatably supported shaft, is provided with a thin-walled sleeve arranged such that a gap is provided along a circumferential direction of the shaft. The clamping device clamps the shaft by deforming the thin-walled sleeve towards the shaft.

Abstract: The invention concerns a powder composition including an iron or iron based powder and a lubricating amount of an alkylalkoxy or polyetheralkoxy silane, wherein the alkyl or polyether group has between 8 and 30 carbon atoms and the alkoxy group includes 1-3 carbon atoms.

Abstract: The invention is directed to a process for manufacture of fine precious metal containing particles, specifically silver-based particles and silver-based contact materials via an intermediate silver(+1)-oxide species. The process comprises in a first step the formation of a thermally instable silver (+1)-oxide species by adding a base to an aqueous silver salt solution comprising an organic dispersing agent. Due to the presence of the organic dispersing agent, the resulting silver (+1)-oxide species is thermally instable, thus the species is decomposing to metallic silver at temperature lower than 100° C. The process optionally may comprise the addition of a powdered compound selected from the group of inorganic oxides, metals, and carbon-based compounds. Furthermore the process may contain additional separating and drying steps. The process is versatile, cost efficient and environmentally friendly and is used for the manufacture of silver-based particles and electrical contact materials.

Abstract: A shaving/cutting device with directly deposited (formed) razor structures without the use of intermediate adhesives. The device is in the form of a substantially flat substrate with miniature razors that have been directly deposited and formed onto the surface of the substrate. The substrate is of a rigid or flexible nature. The substrate is substantially thin and is therefore flexible and its shape is rectangular, circular or oval in nature. The razors are substantially deposited in plurality as an array formation onto the surface of the substrate. In most cases the razor array formation is in the form of parallel, curved and concentric nature. Flat mesa structures that are substantially the same height as the razor structures are incorporated in the razor array formations. The methods of manufacturing one or more directly deposited razor structures and mesa structures is disclosed.

Abstract: A tool for holding a rod having a threaded end, such as a bolt, in an aperture is disclosed. The tool comprises a handle with a knife portion extending from the handle. The knife portion has a first thread engaging edge and a second thread engaging edge that form a notch. The first thread engaging edge and the second thread engaging edge are configured and arranged to engage the threads on a bolt or a threaded rod to temporarily prevent it from being extracted from the aperture.

Abstract: A bendable-head power ratchet tool is described in which a conventional motor body is connected to a conventional socket head ratchet mechanism by a unique two-piece split-shaft the pieces of which articulate in the Z-axis while delivering torque. The driveshaft and foreshaft are coupled by a pivotable shaft coupling made from a simple and rugged slotted ball with wristpin in mating socket. Surprisingly simple, the pivotable shaft coupling may be assembled by merely dropping the foreshaft onto the driveshaft in place in the housing. Such ratchet tools may be pneumatic or electric. A preferred embodiment is an air-powered bendable head ratchet wrench.

Abstract: A selective one-way screwdriver includes a handle including a grip, a driving device for driving a bit-coupling member in a selected one of two opposite directions, a first driving section, a second driving section comprising a skid-proof device and a third driving section comprising a skid-proof device. The diameter of the first driving section is larger than that of the second driving section. The diameter of the second driving section is larger than that of the third driving section. The first, second and third driving sections are good for providing different maximum torques at different top speeds.

Abstract: A magnetic connecting tube for a screwdriver head including a main body, a push sleeve, an engaging piece, a compression ball, a blocking ring, a spring element, a polygonal bar, an stationary magnet, and a mobile magnet. A slide sleeve is mounted on the mobile magnet that is synchronically movable with the slide sleeve. The slide sleeve is disposed at a position corresponding to that of the compression ball. Moreover, the slide sleeve includes an axial guide slot with a deep top and a shallow bottom. In this way, the movement of the mobile magnet can be restricted by the interaction of the compression ball and the spring element. Meanwhile, it is easy to complete the initial process of the insertion of the polygonal screwdriver bit without moving the push sleeve. Accordingly, a simple operation can be ensured.

Abstract: A tool is provided for slidably receiving, magnetically holding, and mechanically engaging fasteners, tool bits, and nuts. The tool comprises one or more magnetic annuluses in stacked relation to each other. The tool defines an inner periphery that matches the shape of the fastener, bit, or nut. The tool further comprises an outer periphery adapted to be grasped by a hand or a tool so that a mechanical torque applied to the outer periphery of the annulus, which results in a mechanical torque applied to the fastener, bit, or nut.