Abstract: A portable electronic device disposed in a car is provided. The portable electronic device includes a power switch, a vibration sensor and a controller. The power switch is used for providing a first power at a first state and providing a second power at a second state. The vibration sensor is used for outputting a vibration signal after sensing the vibration of the car. The vibration sensor is used for terminating the output of vibration signal when not sensing the vibration of the car. The controller is electrically connected to the vibration sensor and the power switch. When the controller receives the vibration signal, the controller controls the power switch to be at the first state and provide the first power. When the controller does not receive the vibration signal, the controller controls the power switch to be at the second state and provide the second power.

Abstract: A chatter boundary system includes a measuring module, a comparison module, and a boundary module. The measuring module measures and collects samples of undulations in a manufactured part. The comparison module classifies a sound signal generated by the undulations as either noisy or quiet. The boundary module determines a continuous boundary between the noisy and quiet undulations based on the samples and the sound signal.

Abstract: In a method and a device for the ultrasonic testing of a workpiece (2) having an uneven surface (13, 13b) with an ultrasonic test head (10), acoustically coupled to the workpiece (2), which contains a multiplicity of transducer elements (201 to 20n) arranged rigidly in a linear array, which can be driven in a time-delayed manner with a delay time predetermined for each transducer element (201 to 20n), the propagation time of an ultrasonic signal transmitted by an individual transducer element (201 to 20n) and reflected from the surface (13) and received by this transducer element (201 to 20n) is measured for a number of the transducer elements (201 to 20n) and is used for correcting the delay times, and the transducer elements (201 to 20n) are subsequently driven with these corrected delay times.

Abstract: A monitoring system uses sound waves and/or ultrasound waves that are emitted into a structure being monitored from one or more monitoring devices and echo-waves from the interior and surface of the structure are received at one or more monitoring devices at locations of importance to the stability and operational worthiness of the structure. Received signals from echo-waves are processed so that operational noise is largely eliminated or reduced to an acceptable level then collected and stored or archived; newly received and processed signals are also compared with existing archive signals and a decision is made for each new signal if it is representative of the structure being unchanged or representative of the structure after significant structural change has occurred. Results of decisions at locations of interest are combined to give a graded risk for the structure as a whole as well as identifying specific locations of significant structural change.

Abstract: Apparatus, systems, and methods for inspecting and monitoring bolted joints of metallic and composite structures for defects such as delamination and fatigue cracking are provided that incorporate ultrasonic transducers with load bearing washers. These active washers may be used for inspecting and monitoring a structure beneath such load bearing fasteners as bolts and nuts. Active washers may be used for continuous, periodic, and controlled inspections of bolted joints. Ultrasonic transducers may be permanently applied to a surface of a washer or recessed in a cavity on a surface of the washer. Inspection signals may be transmitted from ultrasonic transducers into a structure and reflected in pulse-echo application or received by another active washer on the opposing side of the structure in a through-transmission application.

Abstract: A health monitoring apparatus for a mechanical system includes: a microphone arranged to receive sound from the system; and a processor adapted to process the output of the microphone. The mechanical system may be a gas turbine engine. Further, the engine may have a plurality of bleed valves, each of the bleed valves being configured such that, when open, it produces a sound which is distinguishable from the sounds produced by the other bleed valves, and the microphone being arranged to detect the sound from the bleed valves.

Abstract: A sensor hard to break and capable of improving sensitivity is obtained. This sensor comprises an electrode plate and a diaphragm, opposed to the electrode plate, including a first elastic film arranged on a central portion and a second elastic film, arranged at least on a peripheral portion of the first elastic film, made of a material having a lower elastic modulus than the first elastic film.

Abstract: A pressure sensor includes: an airtight case equipped with first and second pressure input orifices provided respectively on opposing first and second wall surfaces; a cylindrical first bellows fixed on the first wall surface at one end and equipped with a shaft hole communicating with the first pressure input orifice; a cylindrical second bellows fixed on the second wall surface at one end; equipped with a shaft hole communicating with the second pressure input orifice and arranged in series with the first bellows; a resonator-adhering pedestal arranged and fixed between other ends of the first and second bellows; a lamellar piezoelectric resonator supported by the resonator-adhering pedestal, and an oscillation circuit electrically connected to an electrode pattern of the piezoelectric resonator.

Abstract: A conveyor diagnostic system for monitoring loading of a conveyor line assembly including at least one sensor component coupled to the conveyor line assembly. The sensor component is adapted for detecting loading of the conveyor line assembly and is further adapted for generating and transmitting a signal that is correlative of the loading of the conveyor line assembly. The conveyor diagnostic system also includes a ground station adapted to receive and process the signal that is correlative of the loading of the conveyor line assembly. Furthermore, the conveyor diagnostic system includes a local positioning system that is adapted for detecting the location of the sensor component in relation to a reference point. A method of using the conveyor diagnostic system is also disclosed.

Abstract: Methods of characterizing a mechanical stress level in a stressed layer of a transistor and a mechanical stress characterizing test structure are disclosed. In one embodiment, the test structure includes a first test transistor including a first stress level; and at least one second test transistor having a substantially different second stress level. A testing circuit can then be used to characterize the mechanical stress level by comparing performance of the first test transistor and the at least one second test transistor. The type of test structure depends on the integration scheme used. In one embodiment, at least one second test transistor is provided with a substantially neutral stress level and/or an opposite stress level from the first stress level. The substantially neutral stress level may be provided by either rotating the transistor, removing the stressed layer causing the stress level or de-stressing the stressed layer causing the stress layer.

Abstract: A micromachined strain gauge comprising a plastically deformable piezoresistive microstructure formed on a surface of a substrate so that deformation of the substrate plastically deforms the microstructure to thereby change the resistance of the microstructure. The stress in the substrate can be determined from the change in the resistance of the microstructure.

Abstract: The invention involves a set for measuring the linear strain of materials, comprising at least two measuring elements (1) fitted with measuring blades (2) with parallel axes of the measuring blades (2), attachable to the measured material, and a portable reading device (3) with an impression surface (4) made of a material with dimensional stability and strength lower than the strength of the material of the measuring elements (1) and/or the portable measuring device. The measuring blades (2) are fitted with fixtures (5) in the center and the measuring elements are fitted with necks (6) and a tapered end (7) at the bottom; the measuring elements (1) are attached to the surface of the measured material using a resin-based adhesive.

Abstract: Apparatus for testing mechanical properties of a sample cement composition. The apparatus includes an annular test chamber and a variable stress system. The variable stress system communicates with the annular test chamber. The variable stress system is operable to control at least one of temperature or pressure applied to the sample cement composition in the annular test chamber during and after curing of the sample cement composition. One or more sensors are coupled to the annular test chamber. The sensors are operable to sense at least one of stress, strain and displacement from the sample cement composition in response to one or more changes applied to the annular test chamber by the variable stress system for determination of at least one mechanical property of the sample cement composition.

Abstract: This invention relates generally to testing apparatus and methodology for measuring fluid dynamic properties of structures within fluid flows. One embodiment includes a fluid induced motion testing apparatus of the type which includes a test rig suitable for holding a test body in a fluid body. The apparatus may include any of an actuator suitable for producing a force upon the test body; a turbulence generator located in the fluid body up current from the test body suitable for generating a turbulent flow field with uniform turbulence intensity across the fluid body-test body interface, the turbulent flow field including dominate vortical structures, the axis of the vortical structures about parallel to the longitudinal axis of the test body; or a test body adjuster suitable for adjusting the test body relative to the fluid current in four or more increments, thereby enabling multiple headings of the test body to be tested against the current of the fluid body.

Abstract: The invention relates to a pressure sensor in the form of a film, comprising a first carrier film and a second carrier film which are arranged at a certain distance from each other by means of a spacer. The distance holder comprises at least one recess which defines an active region of the pressure sensor wherein both of the carrier films are arranged opposite each other, also comprising a first electrode and a second electrode and a layer made of pressure-sensitive material. The first electrode, the second electrode and the layer made of pressure-sensitive material are disposed in the active region on the first and/or second carrier film such that when the carrier films are pressed together through the pressure sensitive layer, electric contact is produced between the first and the second electrode.

Abstract: A tension measuring apparatus and method for a chain by which tension applied to the chain is correctly and reproducibly measured is disclosed and claimed. A tension measuring method for a chain (10) comprising a pair of right and left inner plates (11), bushes (12) press-fit between the inner plates (11), a pair of right and left outer plates (13) disposed on both outsides of the inner plates (11), connecting pins (14) loosely inserted into the bush (12) and press-fit between the outer plates (13), and connected to each other characterized in that a strain gauge is applied to a position having a relation of a ratio of 1 to 1 between tension applied to the chain and an output of the strain gauge (16).

Abstract: Light irradiation detecting sections for irradiating laser light to reflectors of a rotational body and receiving the reflected light are downsized. A light transmitting and receiving device 21 has incident light receiving fibers 25a and 25b for guiding both incident light and reflected light and light irradiation detecting sections 11a and 11b, as well as polarization-maintaining fiber circulators 24a and 24b. The light transmitting and receiving device is structured such that reflected light is received through the same light path as the light path for outputting laser light from a laser light output device 20 through a branch connector 23.

Abstract: The invention is directed to a system and method for detecting substances, such as explosives and/or drugs, using, in part, short bursts of energy light from a relatively low energy strobe. Embodiments include coupling the strobe with a detector for use in a portable hand-held unit, or a unit capable of being carried as a backpack. Embodiments further include placement of one or more stroboscopic desorption units and detectors in luggage conveyors systems, carry-on X-ray machines, and check-in counter locations.

Abstract: An aerosol size-selective impactor for reducing particle bounce includes a main structure, a buffering layer, and a dehydration preventing layer. This main structure with an inlet and an outlet has a central channel and a receiving cavity. There are many nozzles in the inlet. The buffering layer is filled in the receiving cavity. The dehydration preventing layer is coated on the buffering layer for reducing the dehydration of water contained in the buffering layer. So, this invention utilizes the design of the receiving cavity to receive both layers. Its accuracy is high. Its sampling time lasts longer. It can endure vibrations. This invention can yield the particle bounce effect with lower cost. And, its application scope is wide.

Abstract: A particle size sampler includes a cylindrical housing with an inlet end and an outlet end. A pump, connected to an outlet pipe at the outlet end, draws air through the particle size sampler. Aerosols or other particles are removed from the air during a series of filtering steps. The filtering steps include an impactor, a plurality of mesh screens, and a backup filter to remove any particles remaining after the previous filtering steps. The particle size sampler may operate for long periods of time providing a size distribution and concentration of small particles in the air.

Abstract: The exchangeable pipette tip assembly (3) is seated on the pipette body, and has the ejector push (6) linked to the ejector (8), while the ejector push button (6) has the push button toothed bar (9), and the ejector pusher (7) has the pusher toothed bar (10). Inside the pipette body the push button toothed wheel (11) is disposed, which is engaged with the push button toothed bar (9), and the pusher toothed wheel (12), which is engaged with the pusher toothed bar (10), while both toothed wheels (11, 12) are interconnected so that they make the same rotational movement around their common axis (13) of rotation rigidly fixed with respect to the handle (1).

Abstract: A portal is provided with a detector for detecting trace amounts of substances of interest that may be retained on the surface or interior of a vehicular subject. The portal relies upon the continuous process by which microscopic flakes of dust, dirt, pollen, and other surface and interior contaminants as well as adsorbed analyte media and analyte vapors continuously separate from the surface of vehicular subjects and escape from the interior of vehicular subjects. The portal further leverages the existence of a vehicular thermal plume consisting of a layer of warm air adjacent to the vehicular subject. The warm air rises in the cooler surrounding air and transports the microscopic flakes of surface contaminants, desorbed analyte, and analyte vapors upwardly. The portal capitalizes on this phenomenon by providing at least a partial enclosure with a funnel-shaped collector above the vehicular subject.

Abstract: An immersion probe has a probe body having a longitudinal axis and an outer surface surrounding the longitudinal axis, wherein a portion of the outer surface has sampling elements, which extend around the longitudinal axis in the peripheral direction and which have a radial dimension. A protective layer, which can be dissolved or combusted in molten steel or slag, is arranged around the sampling elements.

Abstract: A gas sampling container (15) capable of obtaining, isolating and transporting samples of gas or other fluid under pressure form. The container (15) further exhibits a plurality of simple, reliable, inexpensive, self sealing, valves (2) which allow introduction, flow through and exit of the gas sample. The container (15) is suitable for taking discrete or serial samples from a gas or fluid flow source and is especially suited for use in automated sampling apparatus. These containers are acceptable for shipment of compressed flammable gases under the regulatory structures of many countries.

Abstract: A particle counter has a saturator inhaling air in an atmosphere and vaporizing a working liquid therein; and an electrical detection unit electrically shielding an internal space thereof to maintain a temperature of the space to be constant, the air and vaporized working liquid flowing into the electrical detection unit through a side thereof from the saturator, condensing the vaporized working liquid on surfaces of ultrafine particles contained in the air, and charging the particles to measure a current of the charged particles, thereby measuring the number of the particles included in the air. According to the invention, it is possible to measure the number concentration of the ultrafine particles included in the air, and it is easy to move the counter depending on the measurement locations.

Abstract: A portal (1) has a millimetric wave imager (10, 11) arranged to detect articles concealed on the person. A pump (21) supplies jets of air through gas outlets (20) in the lower part of the portal (1), which are directed onto the feet of the person being screened. A second pump (25) pumps air with substances released by the jets via inlets (22) to an ion mobility spectrometer (24) arranged to detect the presence of explosives or narcotics. A screen (12) indicates the presence of any suspect article or substance on the person being screened.

Abstract: A device having at least one housing and one bottom connected to the housing. In this context, the housing has a housing wall and the bottom at least one base. Further it is provided for the base to have a specifiable edge. The essence of the present arrangement now lies in the fact that the edge of the base has at least two regions, a first region being situated closer to the housing wall and a second region being further removed from the housing wall.

Abstract: A gearbox including parallel shafts and two clutches, more specifically, a solid clutch shaft and a hollow clutch shaft that are concentrically arranged, and two non-concentric main shafts. In the gearbox the first main shaft carries a descending pinion that directly engages with a differential ring gear, and the second main shaft drives the differential ring gear by a driving shaft acting on the first main shaft and by the descending pinion.

Abstract: An actuator for actuating a gear shift mechanism in a vehicular transmission system, the actuator comprising: an actuator body (40) having an opening (43) for the transport of fluid into and out of the actuator body; an actuating member (42) within the actuator body, moveable by the fluid; and a control device (410, 416) operable to control independently the pressure of the fluid and the flow of the fluid.

Abstract: A breather for a driveline component such as an axle, for example, includes a rigid body portion attached to an axle housing, an extension portion attached to the rigid body portion and extending into a housing cavity, and a conical spring supported by the extension portion. The rigid body portion has an internal bore that extends from a first body end to a second body end with the first body end extending outwardly from the axle housing and the second body end being fixed to the axle housing. The extension portion has a non-uniform cross-sectional area, and includes an extension bore with a large internal diameter. The conical spring is received within the extension bore and cooperates with the extension to prevent lubricating fluid from exiting the breather while still allowing air to vent through the breather as needed.

Abstract: A method and structure for making magnetite nanoparticle materials by mixing iron salt with alcohol, carboxylic acid and amine in an organic solvent and heating the mixture to 200-360° C. is described. The size of the particles can be controlled either by changing the iron salt to acid/amine ratio or by coating small nanoparticles with more iron oxide. Magnetite nanoparticles in the size ranging from 2 nm to 20 nm with a narrow size distribution are obtained with the invention. The invention can be readily extended to other iron oxide based nanoparticle materials, including M Fe2O4 (M=Co, Ni, Cu, Zn, Cr, Ti, Ba, Mg) nanomaterials, and iron oxide coated nanoparticle materials. The invention also leads to the synthesis of iron sulfide based nanoparticle materials by replacing alcohol with thiol in the reaction mixture.

Abstract: The present invention provides a method of producing metal nanoparticles, having a high yield rate and uniform size achieved by employing a heterologous reducing agent that considerably reduces unreactant, and using ethylene glycol that allows effective separation of desired metal nanoparticles. In addition, the present invention provides metal nanoparticles having high dispersion stability achieved by capping with polyvinyl pyrrolidone(PVP) and conductive ink including these metal nanoparticles. One aspect of the invention may provide a method of producing nanoparticles comprising, (a) mixing ethylene glycol, capping molecules and a reducing agent, (b) mixing a metal precursor with alcohol-based compound and reacting it with the mixture of (a), and (c) finishing the reaction by adding acetone and ethylene glycol to the reaction solution (b).

Abstract: The present invention aims to provide electroconductive fine particles having excellent electrical conductivity with fewer pinholes in a gold coating, a method of producing the electroconductive fine particles, which are cyan-free type with a plating bath excellent in stability, and an anisotropic electroconductive material using the electroconductive fine particles.

Abstract: A supported cutting device is provided that includes a base and at least one cutting element having a cutting edge. The at least one cutting element extends outwardly from the base and has a geometry that permits the supported cutting device to be separated from a mold along parting lines. The base and the at least one cutting element are integrally formed of a metallic material applied by a deposition process. A method of making a supported cutting device is also provided. The method includes the steps of: 1) providing a template having at least one cutting element with a cutting edge; 2) forming a mold using at least a portion of the template that includes the at least one cutting element; 3) depositing a metallic material onto the mold to form a supported cutting device that includes a base and at least one cutting element; and 4) separating the supported cutting device from the mold.

Abstract: A maraca is provided with a handle having a first end and a second end, the second end being coupleable to the maraca. A tool configured to engage a bottle cap may be mounted in the handle. The handle further includes a part configured for engaging an opener or a tab of a can.

Abstract: A ring top container opener for opening a closure of a container. The closure includes a ring member in operable engagement therewith. The ring top container opener comprises a body having a first end, an intermediate portion and a second end. The body comprises a top surface and a bottom surface. The top surface and the bottom surface taper to define an insertion member proximate the second end of the body. The body further comprises a first side surface and a second side surface. The first side surface and the second side surface taper to define the insertion member proximate the second end of the body. A lower lip member is secured proximate the first end and is dimensioned for insertion under a ring member. A first fulcrum surface defined by a first portion of the bottom surface of the body is located between the intermediate portion and the insertion member.

Abstract: A hose clamp compression tool for engaging and compressing opposed or opposite end tangs of a hose clamp includes a first fixed plate and jaw and a second fixed plate spaced from the first fixed plate and jaw. The first and second plates are mounted on rails with a sliding jaw also mounted on the rails and positioned between the fixed jaws. The sliding jaw is rotatably adjustable in spacing from the one fixed jaw by means of a threaded rod journaled to the fixed plates and threaded to the sliding jaw.

Abstract: The torque wrench with quick release gear set is a system having a rotary actuator drive unit, which is attachable to a planetary drive gear set by a quick-release cylindrical adapter and collar so as to provide quick interchangeability of gear sets without the use of tools. The rotary actuator actuates the planetary gear set by means of a drive shaft connection through the quick-release cylindrical adaptor to engage a corresponding input gear drive shaft. The rotary actuator may have a pistol grip handle that rotates 360° to provide a user with an ergonomically friendly tool. The planetary gear set contains axial thrust bearings between each planet carrier to reduce friction and increase stability. The planet carriers are made of single piece construction to provide increased gear set durability. Precision radial bearings keep the planetary carriers and annulus concentric.

Abstract: Radius Wrench is a curved wrench used to access hard to reach areas. Radius Wrench utilizes a set of gears as well as the standard ratchet or air assisted tools such as the air gun and air ratchet. Through the use of gears, the ratchet is placed on one end of the wrench and the other end is placed onto the fastener that needs to be removed or tightened. Radius Wrench is easy to operate and prevents injuries to the hands from difficult to reach locations.

Abstract: A hand tool comprising a first arm, further comprising a first handle, a first plate-like body coupled to the handle, a first jaw coupled to the first plate-like body and a second arm pivotally coupled to the first arm, the second arm further comprising a second handle, a second plate-like body coupled to the handle, and a second jaw coupled to the second plate-like body. The first arm and the second arm further comprise a first channel and a second channel forming a negative space when the first arm and the second arm are coupled together suitable for receiving an elongated member inserted lengthwise through the hand tool through the negative space.

Abstract: A wrench includes at least one working end being configured as a circumferentially continuous box and a stop plate configured to be locatable in a working position external from and adjacent to the circumferentially continuous box. The stop plate may include opposed first and second ends, where the first end may be configured to operably engage a shank and the second end may be configured as a plate. The plate may be sized to substantially conform with the circumferentially continuous box and define an opening substantially concentric with the circumferentially continuous box when the stop plate is in the working position.

Abstract: A hand tool includes a first arm and a second arm. The first arm includes a gripping portion and a handle. The gripping portion comprises a first gripping surface. The second arm includes a gripping portion and a handle. The gripping portion includes a second gripping surface opposed to the first gripping surface. The second arm is pivotally connected to the first arm. The hand tool is adapted to hold an object between the first and second gripping surfaces. The handle of the first arm is compliant such that it flexes with respect to the gripping portion in response to an applied force.

Abstract: Boring tool and a cutting insert therefor. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: The invention relates to a device for damping vibrations and/or controlling the flexion of an object (2, 10) in machining, said device comprising at least one force exchange device (7) which could be a force applying device or a damping device. A such force applying device (7) is for applying a force having a force component directed at right angles to the surface of the object and/or for applying a moment to the object (2, 10). A damping device (7) of this type is for absorbing vibrations from the object (2, 10) and is adapted to absorb a force component directed at right angles to the surface of the object or to absorb a moment from the object.

Abstract: An automatic paper cutting apparatus includes an X-Y cutter, a cutter controller, and a pattern booklet. The pattern booklet includes a plurality of pattern identifiers and a memory device with cutting instructions for each of the identified patterns. The booklet removably mounts to the cutter controller so that an operator can select a pattern from the pattern booklet and have the memory device provide the corresponding set of cutting instructions to the cutter controller. The cutter controller uses the instructions to control the X-Y cutter and cut the desired pattern. A cutting platform of the X-Y cutter has a tacky adhesive that releaseably secures a work piece to the cutting platform during cutting operations. The cutting platform includes surface features that engage a spur gear. The cutter controller selectively rotates the spur gear to drive the cutting platform in the Y direction.

Abstract: A cutting including a saw blade protruding from an upper surface of the table can include a splitter positioned on the front side with respect to a cutting direction of the saw blade and in alignment with the saw blade. A guard device is provided for covering the saw blade. A kickback preventing claw member prevents the workpiece from being forced upward by the saw blade after the workpiece has been cut by the saw blade. A mount frame is detachably mounted to an upper portion of the splitter. The guard device and the kickback preventing claw member are supported on the mount frame, so that the guard device and the kickback preventing claw can be removed separately or together from the splitter.

Abstract: A device for cutting sanitary containers, in particular sacks, bags, and/or pouches for stomas, includes a structure (2) provided with a housing portion (3). The housing portion (2) has a cutting plate (4, 10) whereon is set down a container to be cut. The cut is accomplished by cutting elements (23) associated with the structure (2). The cutting elements (13) are adapted to cut a structural portion of the container, defining its inlet. The cutting elements are further provided with adjusting elements (17) to determine the amplitude and the shape of the inlet of the container being prepared, in relation to the shape and the dimensions of the stoma of a patient.

Abstract: A power tool provided by the present invention includes a tool body for holding and processing a workpiece, and a cabinet standing on a floor. The cabinet has a platform connected to the tool body, a bottom plate, a peripheral wall defining an accommodation space and having a top part surrounding a periphery of the platform, and a bottom part surrounding a periphery of the bottom plate, and a door provided at one side of the peripheral wall. The area surrounded by the periphery of the bottom plate is greater than the area surrounded by the periphery of the platform.

Abstract: Apparatus for working pliable material comprises a body, at least two rotatable shafts coupled to the body, an embossing assembly detachably coupled to an end of at least one of the shafts, and a cutting assembly and/or a creasing assembly being alternatively coupled to the end of the shaft in place of the embossing assembly. In one embodiment, the apparatus is powered by hand via a rotatable handle coupled to at least one of the shafts. The assembly may further comprise an adjustment wheel and an adjustment shaft for accomodating various material types.

Abstract: The present invention relates to a single-hole puncher with ease of alignment comprising a base and a punching unit; the punching unit is disposed on the base; a hole is disposed on the base in a position corresponding to the punching unit; a L-shaped right-angle receptacle with two vertical flanges is disposed between the base and the punching unit; the punching unit and the right-angle receptacle are vertically disposed facing each other. Since the L-shaped right-angle receptacle of the present single-hole puncher allows convenient and efficient paper alignment, the present invention, in comparison with available single-hole punchers, has the advantages of being simple in construction, easy to operate, convenient to be carried around and of high punching efficiency and precision. It can also punch binding holes of various distances in between. The structure of the L-shaped right-angle receptacle can be widely applied to various types of single-hole punchers and even two-hole (multiple-hole) punchers.