Abstract: The present invention is a device for and method of viewing a magnetic pattern recorded on magnetic media. The device includes a base. The base has an opening and includes registration marks for aligning the magnetic media as desired. The base is attachable to a viewer. A guide is connected to the base so that it slides within the opening in the base. The guide also has an opening. An inflatable bladder is attached to, and under, the guide. The inflatable bladder fills the opening in the guide. A holder is attached to the base so that it can slide along the base and be closed onto the guide. The holder also includes an opening. A magnetic garnet film is set within the opening in the holder. A magnetic media is placed on the guide. The holder is closed onto the magnetic media and the guide. The inflatable bladder is inflated so that the magnetic media is brought into physical contact with the magnetic garnet film. The pattern on the magnetic media is transferred onto the magnetic garnet film.

Abstract: An XY platen positioning system includes a fixed base rigidly coupled to a essentially planar surface. An XY intermediate plate is slidably coupled to the fixed base, such that the XY intermediate plate is slidable in the X axis along the fixed base. An XY stage is slidably coupled to the XY intermediate plate, such that the XY stage is slidable in the Y axis along the XY intermediate plate. A platen is flexibly coupled to the XY stage, such that the platen, with respect to the XY stage, is essentially constrained in the X and Y axes and moveable in the Z axis.

Abstract: Pressing means is provided to press a movable base to a surface of a reference base to make the movable base in contact with the surface of the reference base to thereby lock-down the movable base on the surface of the reference base. The movable base is moved while slightly floating with respect to the reference base. A movable floating mechanism is provided to float the movable base from the reference base against pressing force of the pressing means exerted on the movable base to thereby relieve the locking. A floating amount of the movable base from the reference base may be small enough to reduce or substantially remove sliding friction between the movable base and the reference base. For example, the floating amount may be as small as ten to several hundreds microns.

Abstract: Magnetic signature measurements are taken at various points corresponding to an original water depth beneath a ship. A computer processor receives and processes (i) this group of measured magnetic signature values and (ii) the designed magnetic signature value the sensing of which actuates the subject magnetic mine, implementing graph display management on a user interface display screen. According to the computer processing, some or all such measured magnetic signature values are extrapolated at different depths each greater than the original depth, thereby yielding several or many groups, each group being of extrapolated magnetic signature values associated with various points corresponding to the same depth, the groups collectively representing a three-dimensional arrangement of extrapolated magnetic signature values associated with various points corresponding to different depths.

Abstract: An apparatus for inspecting a metallic post contoured in a single dimension for defects. The apparatus has a clamp having at least one jaw with a surface conforming to the contour to the metallic post. The conforming jaw or jaws also have a plurality of eddy current coils and the probe has at least one sensor configured to sense at least one of position or motion.

Abstract: An actuator arrangement includes a body and at least one of a piston assembly and a rod assembly slideably disposed in the body. A sensor arrangement includes a sensor, a sensor electronics module, and an interactive element. The interactive element is moveable relative to the sensor, wherein a position of the interactive element indicative of a position of the at least one of a piston assembly and a rod assembly is communicated to the sensor electronics module through the sensor. A housing assembly is attached to an end of the body and includes a sensor pilot portion. The sensor pilot portion in the housing assembly is structured and arranged to sealably receive the sensor electronics module therein, wherein the sensor electronics module is encased within the housing.

Abstract: An eddy current inspection apparatus includes a holder for a specimen, a holder for an eddy current probe, and an eddy current instrument operatively joined thereto. The probe holder includes carriages for translating the probe along first and second axes. The probe holder is selectively moved to align the probe with an internal channel of the specimen for sliding movement therealong to conduct eddy current inspection thereof.

Abstract: An apparatus for inspecting a turbine blade of an aircraft engine may include a shaft having a proximate end and a distal end, an attachment device coupled to the distal end of the shaft and capable of being attached to a strut of the aircraft engine and an engagement device, coupled to the attachment device, capable of moving away from the attachment device and attaching to a trailing edge of the turbine blade. The apparatus may also include a probe moveably coupled to the engagement device and capable of moving along a leading edge of the turbine blade to detect a surface anomaly of the turbine blade and a control device for controlling the movement of the probe along the leading edge of the turbine engine in response to user manipulation.

Abstract: A ferromagnetic thin-film based magnetic field detection system used for detecting the presence of selected molecular species. A magnetic field sensor supported on a substrate has a binding molecule layer positioned on a side thereof capable of selectively binding to the selected molecular species. The magnetic field sensor can be substantially covered by an electrical insulating layer having a recess therein adjacent to the sensor in which the binding molecule layer is provided. An electrical interconnection conductor can be supported on the substrate at least in part between the sensor and the substrate, and is electrically connected to the sensor. The magnetic field sensor can be provided in a bridge circuit, and can be formed by a number of interconnected individual sensors. A polymeric channel and reservoir structure base is provided for the system.

Abstract: A position detector for the position of a pig movable in a pipeline comprises an annular radially magnetized permanent magnet and a magnetic field sensor arranged on the pipeline.

Abstract: The object of the present invention is to provide a method and device thereof that captures microscopic magnetic signals such as those developed by electrical current flowing inside a circuit that is miniaturized to less than sub-micron order, and to evaluate the circuit.

Abstract: Method and apparatus for detecting or analyzing chemical reactions, such as an enzyme reaction, and other events in which electron translation is accompanied by photon emission utilizing a magnetometer probe to detect a change in electromagnetic field strength as a characterization of the event or of a substance. The event may be of unknown cause and a recorded time course of the change in electromagnetic field strength may be compared with known time course of known events to determine the cause of the unknown cause event. Similarly, a chemical substance may be detected and its identity determined.

Abstract: The invention relates to apparatuses and a corresponding method for examining magnetic properties of objects, in particular sheet material, such as bank notes (20). The apparatuses comprise a magneto-optic layer (10) whose optical properties are influenceable by the magnetic properties of the sheet material (20), a light source (11) for producing light that is coupled into the magneto-optic layer (10), and a detector (13) for detecting light that is transmitted and/or reflected by the magneto-optic layer (10). For reliable examination of the magnetic properties of sheet material it is provided that the direction of propagation of the coupled-in light extends parallel to a base surface (9) of the magneto-optic layer (10). The invention permits the magnetic properties in particular of sheet material with areas emitting very weak magnetic fields to be examined with very high sensitivity and reliability.

Abstract: Pressurized elastic support structures or balloons are used to press flexible sensors against the surface a material under test. Rigid support elements can also be incorporated into the inspection devices to maintain the basic shape of the inspection structure and to facilitate positioning of the sensors near the test material surface. The rigid supports can have the approximate shape of the test material surface or the pressurization of one or more balloons can be used to conform the sensor to the shape of the test material surface.

Abstract: A magnetic encoder apparatus comprising a housing is disclosed in the present invention. The housing includes a base portion and a cover plate portion. The housing also comprises a magnet that is contained in the base portion of the housing, a sensor chip having a major surface located adjacent to the magnet, and an alignment spacer comprising a first side and a second side. The first side of the alignment spacer having an opening through to the second side of the alignment spacer, and the second side fitting into the base portion of the housing. The opening of the alignment spacer encloses the sensor chip.

Abstract: A sensor package and method of making the same is disclosed in which the sensor package includes a sensor component for electromagnetic sensing having a holder assembly with the sensor component disposed at one end and sensor terminals in electrical communication with the sensor component extending from an opposite end. A harness assembly having a harness head configured with harness terminals extending therefrom for electrical connection with corresponding sensor terminals. The holder assembly and harness head are configured with a means for snap-fit assembly that provides space to mechanically connect corresponding sensor terminals and harness terminals with each other forming a resultant subassembly for insertion into a sensor housing. The housing further includes a heat-staked interface with the harness head that secures the subassembly relative to the sensor housing.

Abstract: An apparatus and method for the repeatable detection and recording of low-threshold molecular electromagnetic signals. The sample material and detection apparatus are contained with a magnetically shielded faraday cage to shield them from extraneous electromagnetic signals. The detection apparatus includes a detection coil and Super Conducting Quantum Interference Device (“SQUID”). White noise is injected external to the SQUID and the signals emitted by the sample material enhanced by stochastic resonance.

Abstract: Gradiometers are encompassingly disposed, relative to an object of interest, in a configuration generally describing a closed prolate spheroidal shape, and the measurements taken by the gradiometers are mathematically processed. The gradiometric measurements are defined as directional derivatives which exist in equations involving directional derivatives and prolate spheroidal multipole moments of said entity. The prolate spheroidal multipole moments are thereby calculated, and these prolate spheroidal multipole moment values are extrapolated to ascertain the magnetic fields (equivalently expressed, the magnetic signatures) associated with the object and inwardly delimited by the prolate spheroid. The practitioner can optimize such distribution numerically, orientationally and/or positionally by using the equations involving directional derivatives and prolate spheroidal multipole moments. Extraneous magnetic field effects (e.g.

Abstract: A method and system for measuring anchoring strength of liquid crystal through measurement of magnetic field induced torque. In the system for measuring anchoring strength of liquid crystal, when a magnetic field (7) is applied to a liquid crystal cell (1), a torsion wire (5) twists in response to the magnetic field (7) As a result, a mirror (6) attached to the torsion wire (5) displaces, and thus a laser beam emitted from a laser (8) and reflected from the mirror (6) rotates. The displacement of the laser beam is detected by a bisected photodiode (9) for position detection. Specifically, outputs from the bisected photodiode (9) are amplified by means of amplifiers (10) and (11), which output voltages VA and VB, respectively. The magnetic-field induced torque is proportional to the rotational angle of the mirror, which is proportional to VA-VB.

Abstract: A vibrating sample magnetometer controls an electromechanical drive using both ac and dc control and a position sensor. Absolute position sensing is used in a feedback loop to control both an alternating current (ac) drive and a direct current (dc) drive to the electromechanical drive. Improved performance and stability results.

Abstract: In the present invention, when measuring magnetism of a measuring portion of a patient by making use of a dewar incorporating magnetism sensors each including a super conducting quantum interference device, a bed is at first positioned outside a position immediately below the dewar. At this position outside the position immediately below the dewar the patient is laid on the bed in an inspection posture. Marks are attached on the body of the patient at three points for setting X and Y axis coordinate on the measurement portion, at the position outside the position immediately below the dewar cross shaped beam patterns are projected and the position of the bed is adjusted so that the marks at the three points locate on the cross shaped beam patterns, thereafter, bed is transferred by a constant amount to the position immediately below the dewar.

Abstract: An apparatus for measuring the magnetic field distribution of a magnetic sample includes a magnetic field sensor arrangement having three, orthogonally-disposed, Hall sensors for sensing the magnetic field produced by a magnetic sample at a given location, The sensor arrangement is scanned along a predetermined scan pattern. The apparatus then acquires sampling data from the sensor arrangement, the sampled data providing a representation of the magnetic field distribution of the magnetic sample. The data is preferably acquired by an interface card for a PC, which stores sampled data in the main memory of the PC for data analysis and display.

Abstract: Pressurized elastic support structures or balloons are used to press flexible sensors against the surface a material under test. Rigid support elements can also be incorporated into the inspection devices to maintain the basic shape of the inspection structure and to facilitate positioning of the sensors near the test material surface. The rigid supports can have the approximate shape of the test material surface or the pressurization of one or more balloons can be used to conform the sensor to the shape of the test material surface.

Abstract: Disclosed herein is a sensor assembly (10) for attachment to an electrical conductor (5), which includes a base (20) having a cavity (22) and a pair of detector housings (30) extending from the base (20). The detector housings (30) are laterally spaced and substantially parallel and are provided to receive a magnetic field detector. An electronic circuit card (70) is disposed within the base cavity (22) and is operatively coupled to the magnetic field detectors. Additionally, an auxiliary circuit card (90)) that contains logic for detecting an arc fault may be provided for communicating with the electronic circuit card (70).

Abstract: A detection system determines the position of an object moving along a first direction. The system includes a magnetic field source generating a magnetic field signal and a magnetic field detection system coupled to the object. The detection system includes a source interface module with magnetic field sensors positioned a known distance apart along a second direction different from the first direction. Each sensor detects the magnetic field generated by the magnetic field source and generates a magnetic field signal. A processing module processes the magnetic field intensity signal produced by the source interface module. The processing module generates data for each sensor in the source interface module, which is made up of points representing peak magnetic field and sensor location along the second direction. The points are compared to determine the distance of the object from the magnetic field source along the second direction.

Abstract: A magnetic field sensor has a carrier element (1) made from metal, on which a holder (2) with a sensor element (3) is fixed in a set position. For this purpose, the holder (2) engages with holding tongues (9, 10), having barbs (11), in recesses (12, 13) in the holder (2). An interspace (15) filled up by an extrusion coating (16), which also surrounds the remaining holder (2) hermetically, exists between the holder (2) and the carrier element (1) through the bearing of the holder (2) against a stop surface (14) of the holding tongue (9, 10).

Abstract: A magnetic field measuring apparatus for precise cancellation of environmental noise includes a plurality of first SQUID gradiometers to detect noise and biomagnetic fields, a plurality of second SQUID gradiometers to detect noise, a driving circuit to drive these gradiometers, and a computer to execute signal processing after collecting the signals detected by these gradiometers. First and second SQUID gradiometers are provided which include first-order gradient pickup coils with the baselines formed by the coils of second gradiometers being shorter than those of first gradiometers. The apparatus cancels noise, from detected biomagnetic signal waveforms, caused by variant noise cancellation rates of the coils of first gradiometers, different baselines of the coils of second gradiometers, and the frequency property of a magnetically shielded room in which the apparatus is installed.

Abstract: A combined vacuum cup and sensor is utilized to lift parts. The vacuum cup defines a vacuum chamber between radially inner and outer lips. The sensor is mounted radially inwardly of the inner lip, but is isolated from the vacuum chamber. In this way, parts that are difficult for a larger cup to lift can be lifted easily. Moreover, the sensor need not be provided with a fluid tight seal.

Abstract: A fixture for use with eddy current inspection probes facilitates inspection of airfoil leading and trailing edges. The fixture includes a fixture body having a hole formed in one side thereof for receiving a probe and a V-groove formed in another side thereof for receiving a workpiece surface. A clamp arm is pivotally mounted to the fixture body, and a spring is disposed between the clamp arm and the fixture body. The spring biases one end of the clamp arm towards the fixture body so that a workpiece can be clamped between the clamp arm and the fixture body.

Abstract: A system and method for programming a Hall effect sensor while the sensor is connected into the circuitry for a given application. The system includes a fixture for receiving the printed circuit board to which the sensor is mounted. A plurality of contacts, such as pogo pins, are arranged to contact the circuit board at desired pads that permit programming of the sensor, reduction of the voltage applied to the overall circuit during programming, and measurement of the sensor and circuit output. The system includes a voltage limiting circuitry that is electrically connected, via appropriate pogo pins, to the circuitry intermediate the subject sensor and potentially damaged circuit components.

Abstract: The design of an electro-magnetic radiation suppression shield and cooling housing for a computer, server or other electronic device having a computer processor may be greatly enhanced and expedited by a test apparatus that permits the placement of electro-magnetic radiation suppression plates at differing locations, spacings and alignments, which allows a variance in positioning the electro-magnetic radiation source. The test apparatus not only has an air flow cooling opening in which an electro-magnetic radiation suppression panel forms cooling air flow holes but also a fixture for disposing a second similar electromagnetic radiation suppression panel at a distance from the first electro-magnetic radiation suppression panel. Each of the panels may be substituted to test various designs.

Abstract: A high permeability magnetic core structure introduces a magnetic field to an intergrated circuit during testing. The magnetic core is mounted in an automatic tester and is integrated into the mechanical test site assembly that holds the integrated circuit in place during testing. Wound wire coils, mounted on the core structure, generate the magnetic field that is used for the test.

Abstract: An inspection apparatus includes a component engagement apparatus, a detection apparatus, and a movement apparatus and is controlled by a cam. A drawer is slidably attached to the component engagement apparatus to receive and align a component including a TV-shaped opening. The detection apparatus is sized to receive an eddy current probe and is attached to the movement apparatus with an adjustable fixture. The movement apparatus identifies a relative position of the eddy current probe in relation to the TV-shaped opening being inspected and guides the movement of the detection apparatus.

Abstract: A process permits the determination of multi-dimensional distribution of magnetic fields. The process uses a magneto-resistive sensor as a physical measuring device. The measuring device is coupled with a method for algebraic reconstruction so that sectional images of the field distribution are calculated from individual measurements of the magneto-resistive effect using the algebraic reconstruction.

Abstract: An electronic autoclave cycle passively records the number of thermal cycles to which an instrument has been subjected in a steam autoclave. When a sterilization cycle has been completed, and the instrument is next energized in use, a microprocessor is employed to read the sensor and record the occurrence of a sterilization cycle. Information as to the cumulative number of cycles through which the instrument has been subjected is stored in a non-volatile memory. This data is suitably displayed on a display panel. The sensor employed uses either the Curie temperature or a temperature near but below the Curie temperature of a ferromagnetic material by first magnetizing the material and then, later, checking its flux density to determine whether a thermal cycle has occurred. In a first embodiment, a Hall effect sensor is used to directly measure the magnetic field strength of the magnetizable material.

Abstract: Method and apparatus for detecting or analyzing chemical reactions, such as an enzyme reaction, and other events in which electron translation is accompanied by photon emission utilizing a magnetometer probe to detect a change in electromagnetic field strength as a characterization of the event. The event may be of unknown cause and a recorded time course of the change in electromagnetic field strength may be compared with known events to determine the cause of the unknown cause event.

Abstract: A preform test fixture for receiving a blow molding preform includes a structural base, a measuring device mount, a support arm, and a bar member having preform bores. The bar member is adjustable so that it translates up and down on the support arm, and is removably fastened thereto by a knob assembly screwed into a hole in the bar member. The system includes utilizing several bar members to enable the fixture to measure wall thicknesses of a virtually unlimited number of unique preform designs. The fixture also has a pivot device that enables the bar member to pivot on the support arm. The measuring device mount is adjustable on the base. The adjustment capability of the fixture enables uniform and repeatable wall thickness measurements, concentricity measurements at various locations, and preform tip wall thickness measurement proximate the preform gate.

Abstract: A magnetic force microscopy (MFM) probe has an elongated probe tip with a planar surface onto which a uniformly thick magnetic film is formed. The probe tip is formed by focused ion beam (FIB) machining in a manner that creates both the planar surface and a triangular end with the triangular vertex forming the tip apex. Because the magnetic film is formed on a planar surface and has a uniform thickness it has the structural shape of an ideal bar magnet, with the triangular tip apex concentrating the magnetic flux from the ideal bar magnet to a very small volume. The probe tip has a length-to-width ratio of approximately 8:1 or greater, which gives rise to strong magnetic shape anisotropy. This stabilizes the magnetization of the tip in the presence of external magnetic fields, including fields from the sample.

Abstract: A method of and apparatus for torque magnetometry in which a specimen, the magnetic moment of which it is desired to determine, is disposed on a support. A temporally varying, for example sinusoidal, magnetic field is generated in the region of the specimen so that interaction between the magnetic moment of the specimen and the magnetic field causes a torque to be exerted on the specimen. Consequently, the specimen and/or the support are deflected and typically exhibit a vibratory motion. The motion of the specimen and/or support due to the torque is measured. When the magnitude and direction of the magnetic field are known, the magnetic moment of the specimen can be determined from the results of the motion measurement. The frequency of the magnetic field can be adjusted so that the specimen and/or the support resonate. The support is typically a single silicon crystal having two orthogonal modes of vibration which have different resonant frequencies.

Abstract: Device and process for detecting defects in an arrangement of reinforcing members in casing plies in a sidewall region of at least one of an unvulcanized tire blank or a vulcanized pneumatic vehicle tire to be tested. The reinforcing members may include a magnetizable material and the device may include a support device that rotatably supports the at least one of the unvulcanized tire blank or the vulcanized pneumatic vehicle tire in rotation around a rotational axis and at least one sensor that measures magnetic field intensities in a heterogeneous magnetic field resulting from inductions generated by the defects in the arrangement of the reinforcing members moving through the heterogeneous magnetic field. The at least one sensor may be positioned in a radial measuring position in a radial region of the sidewall.

Abstract: A cryogenic apparatus for microscopy of physical properties of an object including a thin, stiff, transparent substrate or window within the outer wall of the vacuum space of a dewar and a cryogenic sensor within the vacuum space and spaced very close distances to the window. This construction allows for positioning a sample for measurement outside of the vacuum space, at room temperature or higher and for microscopy of physical properties of the sample by monitoring the output from the cryogenic sensor as it is scanned along the surface of the sample.

Abstract: A torque magnetometer employing integrated piezoresistive levers to measure magnetization of very small anisotropic samples. A sample holding platform is cantilevered from the substrate by parallel legs on which piezoresistors have been applied. A Wheatstone bridge, which includes the piezoresistors, is completely integrated on a magnetometer substrate. Specific output connections are made to the electrical conductors of the bridge in a manner to eliminate Hall effect error signals in an alternative embodiment.

Abstract: A portable three axis scanner is usable to inspect a gas turbine engine spool in situ upon removing a fan module from the engine. The scanner includes a drive assembly mountable to a forward end of the spool, and a support assembly mountable to an aft end of the spool. A support beam extends between the drive and support assemblies, and a carriage assembly is mounted thereon. The carriage assembly includes a probe support for mounting a removable scanner probe for inspecting the inside of the spool by ultrasonic or eddy current inspection. The drive assembly includes means for axially translating the carriage assembly, means for rotating the carriage assembly, and means for radially translating the probe support and probe thereon so that the probe has three-axis movement including axial, circumferential, and radial, respectively, for being selectively positioned inside the spool between the forward and aft ends thereof for inspecting the spool.

Abstract: A charged particle beam is transmitted through a specimen for producing an irregular pattern as a first image. Further, a magnetic field to be measured is arranged in space where a charged particle beam is passed between the specimen and an image plane thereby to produce a second image having an irregular pattern as in the foregoing case. The first image and the second image are processed to produce the deflection angle of the charged particle beam due to the magnetic field. This deflection angle is extracted from the entire positions of a cross section of the space where measurement is desired, thereby constructing projection data of a magnetic field by a charged particle beam. Furthermore, the magnetic field to be measured is rotated and the above-mentioned processing is performed from each direction to construct projection data. The projection data thus obtained and the computer tomography technique are used to determine a magnetic field at each point in space.

Abstract: A biological information-measuring apparatus which is situated in a shielded room and includes measuring means for measuring biological information of a subject arranged and supported between a pair of supporting pillars of a double housing type support, wherein H-cross section members are combined to form a lattice-like supporting frame, and the bottoms of the supporting pillars are anchored to the members forming the supporting frame.

Abstract: A system and method for assessing the electric and magnetic field generated by equipment under test (EUT) by maintaining the EUT in a specified, fixed tilt position, allowing the EUT to rotate while in that specified position and tilting the TEM cell through at least two angles about the EUT. Embodiments contemplate that a fixed tilt mechanism for maintaining the EUT in a fixed position relative to the tilting of the TEM cell is used. The present invention further contemplates various schemes for determining the electric and magnetic fields generated from the EUT based upon the composite electromagnetic reading from the TEM cell. These schemes, which result in improved measurements of the magnetic and electric fields, determine the angles to which the TEM is tilted.

Abstract: Medical patients are screened prior to magnetic resonance imaging by using a superconducting quantum interference device magnetometer to detect the unknown presence of an implanted ferromagnetic object. The patient is placed on a table which vibrates at approximately five Hertz. The magnetometer is sequentially held stationary at a plurality of positions adjacent to the patient being vibrated. The magnetic field intensity is measured at each position with the magnetometer and the magnetic field measurements are used to determine the presence and location of a ferromagnetic object within the patient.

Abstract: An apparatus for checking the surface condition of rollers for bearings, in particular barrel rollers, in which the pieces are conveyed and lined up in a row towards a checking station. In order to ensure the correct positioning of each piece during the checking operations, a compression force is applied to a section of the row, and in particular a thrust and a resisting action are applied at the ends of the section, urging the pieces of the section against one another in the course of their translation along a feed direction. Checking operations, for example through eddy current rotating heads, are carried out on pieces of the section.

Abstract: In a device for positional fixation of a coil support in a cup-shaped formed casing part, wherein a closure part (4, 8) is attached to the cup-shaped casing part (1, 2, 22). Said closure part (4, 8) is disposed on the side of the coil support (10, 19, 21) , located remotely relative to the floor (22) of the cup-shaped casing part (1, 2, 22), in or, respectively, at the cup-shaped casing part (1, 2, 22). Tongue-shaped adjuncts (9, 33) are furnished at the closure part (4, 8). Said tongue-shaped adjuncts (9, 33) extend in a direction toward the coil support (10, 19, 21) and exhibit nose-shaped protrusions (13, 29) directed toward the wall of the coil support (10, 19, 21) . Projections (11, 31) or, respectively, recesses (12, 30), are formed like a lock toothing, and are furnished at the coil and are disposed toward the tongue-shaped adjuncts (9, 33).

Abstract: A portable magnetic field analyzer for sensing ion specific resonant magnetic fields. The analyzer has a magnetometer which measures the magnetic field produced by both ac and dc sources along an axis and determines the dc field plus the fundamental and various harmonic frequencies. A microcontroller uses this information to calculate various cyclotron resonance frequencies and then compares the calculations to stored data relating to cyclotron resonance frequencies of certain biologically important ions such as calcium, potassium and magnesium. A display notifies the user when resonance conditions (within a set tolerance) exist.