Abstract: A gas sensor unit includes a conductive polymer and an absorbent for absorbing gas molecules. The conductive polymer is polyaniline (PAN) and the absorbent is polyurethane (PU).

Abstract: A capture system to enable volatiles associated with targeted materials located within a confined environment to be trapped over a period of time to enable the volatiles to be concentrated. The capture system comprises a package having a “surface” which is constructed in a manner that it can be located within a confined environment to trap specific volatiles associated with the targeted materials. The captured volatiles are desorbed from the surface and are analysed and the results compared with known signature volatile profiles from the targeted materials.

Abstract: An ion current corresponding to an amount of ion produced by combustion of air fuel mixture in a combustion chamber of an internal combustion engine is detected and an ion current parameter indicative of combustion state is calculated from the ion current. The properties of fuel is determined by a change of combustion state from an engine start time, that is, by a change of the ion current parameter.

Abstract: An instrument for detecting leaks in a hermetically sealed package. The instrument includes (i) a hollow needle, (ii) a mass flow rate sensor in sealed fluid communication with the lumen defined by the hollow needle, and (iii) a vacuum pump. The vacuum pump is in fluid communication with the lumen defined by the needle for evacuating gas from the hermetically sealed package, and in fluid communication with the mass flow rate sensor for directing mass flow from the evacuated package into operable contact with the mass flow rate sensor so as to permit sensing of any continuing mass flow from the evacuated package. The instrument may further include an oxygen sensor in sealed fluid communication with the lumen defined by the hollow needle for analyzing the oxygen concentration of the gas within the hermetically sealed package.

Abstract: Methods for diagnosing, monitoring and evaluating asthma control in subjects and methods of monitoring the efficacy of asthma treatment regimes in said subjects using blood levels of ?-tocopherol quinone.

Abstract: Thus, the present invention provides a method for producing a biosensor comprising a substrate coated with a hydrophilic polymer, which comprises allowing a compound generating a reactive group as a result of external stimulus to bind to the surface of a substrate, and then giving external stimulus in a state where a hydrophilic polymer capable of forming a covalent bond with said reactive group is allowed to come into contact with the substrate, so that said hydrophilic polymer is allowed to bind to the substrate surface via a covalent bond with said reactive group.

Abstract: An optical rheometer system includes a rheometer chamber that can retain a fluid sample to be measured. A light source is provided that creates a light beam incident on the fluid sample. A Peltier heating plate is provided that has a channel region located within the plate. The channel region is configured to substantially transmit a light beam emitted from the light source and incident on the Peltier heating plate. In one embodiment, a rotating optical plate is provided opposed to a first surface of the Peltier plate. The rotating optical plate is substantially transparent such that light from a light beam emerging from the channel region of the Peltier plate can pass through the optical plate and be recorded at a detector. Peltier elements in the Peltier heating plate are arranged to provide uniform heating of sample fluid located on the first surface of the Peltier heating plate. The Peltier elements are further arranged to permit light to pass through the channel substantially unattenuated.

Abstract: A device and method for the separation of a component in a liquid sample prior to the detection of an analyte in said sample, wherein a sample is added to a receiving zone on a substrate, said substrate further optionally comprising a reaction zone, a transport or incubation zone connecting the receiving and reaction zone, respectively, forming a flow path on a substrate, wherein said substrate is a non-porous substrate, and at least part of said flow path consists of areas of projections substantially vertical to said surface, and having a height (H), diameter (D) and reciprocal spacing (t1, t2) such, that lateral capillary flow of said liquid sample in said zone is achieved, and where means for separation are provided adjacent to the zone for receiving the sample. Said means for separation are chosen among filter means, optionally enhanced by affinity binding and/or aggregation; magnetic means, also optionally enhanced by affinity binding and/or aggregation; and acoustic means.

Abstract: An ultrasonic field-portable system for accurately measuring hematocrit (HCT) and hemoglobin concentration (HGB) in small food samples. The system includes an analyzer (10) that allows extremely accurate measurements of blood hematocrit from only one or two drops of +>>d collected in a disposable sampling device (12) that is then inserted into the analyzer (10). The system is compact enough to package into a point of care device, making it a point of care device with accuracy comparable to larger CBC lab equipment.

Abstract: An apparatus for analyzing a measuring substance which is dissolved in a solvent, comprising a conduit (4) for transporting the dissolved measuring substance from a feed means (3) to a measuring location (12), wherein the feed means (3) is designed to optionally feed a solvent or dissolved measuring substance into the conduit (4), is characterized in that the conduit (4) is designed, at least partially, as a polycapillary area (9) which has N parallel connected capillaries (21a, 21b, 21c; 62a, 62b), such that the individual capillaries (21a, 21b, 21c; 62a, 62b) have identical flow times from the feed means (3) to the measuring location (12) and wherein N?2. The apparatus improves the signal-to-noise ratio of the analysis.

Abstract: With a scanning probe microscope, if a plurality of sample properties are measured using a scanning scheme of allowing a probe to approach and withdraw from a sample, the sample properties need to be accurately and reliably detected in the minimum required measurement time. Further, the acting force between the probe and the sample varies depending on the type of the probe and the wear condition of a probe tip. Thus, disadvantageously, property values acquired using different probes cannot be compared with one another unless the artifactual effect of the measuring probes are eliminated. In accordance with the present invention, with a scanning probe microscope, the probe is brought into intermittent contact with the sample, while driving means repeatedly allows the probe to approach and withdraw from the sample with a variable amplitude. The sample property is thus acquired at a high speed.

Abstract: An approach controller (234) of a coordinate measuring instrument enables a position control loop (RP) and drives an actuator (133) so that a force sensor (1) is brought to a close position under a position control. When recognizing that the force sensor (1) reaches the close position, a contact controller (235) controls a switch (227) to enable a force control loop (RF) and drives the actuator (133) to bring the force sensor (1) into contact with a workpiece under a force control.

Abstract: In general, the invention is directed to methods and articles for inspecting aircraft life vests using radio frequency identification technology (RFID). A user interface is described that renders information pertinent to the inspection upon a screen.

Abstract: The present invention proposes a portable barometric altimeter (10) including a pressure sensor (14), a calculation unit (16) which determines an altitude value (H) as a function of the pressure (P) measured by the sensor (14) and as a function of a reference temperature (T0) corresponding to an estimate of the temperature of the air mass at sea level, and a time measuring unit (18) that supplies calendar data (D), characterized in that it includes a correction circuit (32), which selects the reference temperature value (T0) from among a series of values (TS) contained in a database stored in the altimeter (10), as a function of the date (D) and as a function of a predefined climate value (C). The invention also proposes a method of determining altitude (H).

Abstract: A chip-scale atomic gyroscope and methods for sensing and measuring mechanical rotation of an object are disclosed. The chip-scale atomic gyroscope can include a vapor cell including a vapor cavity adapted to contain a vaporized source of alkali-metal atoms and noble gas atoms, a pump laser source adapted to produce a first laser beam along an optical pumping axis for optically pumping the alkali-metal atoms within the vapor cavity to an excited state, and a sense laser source adapted to produce a second laser beam along a sense axis transverse to the optical pumping axis for probing the polarization angle of the noble gas atoms within the vapor cavity. The pump and sense laser sources can each be connected to a servo mechanism, which can be configured to maintain the laser beams at a wavelength corresponding to the carrier wavelength of the alkali-metal atoms and a wavelength detuned from the carrier wavelength.

Abstract: A gyroscope for detecting rotation about a gyro input axis, having a support structure, at least one mass flexibly coupled to the support structure such that it is capable of motion in two directions along a drive axis, the mass offset from the gyro output axis, one or more drives for oscillating the flexibly-coupled masses along the drive axis, one or more mass motion sensors that sense motion of the flexibly-coupled masses along their drive axes, and one or more gyro output sensors that detect rotation of the support structure about the output axis.

Abstract: The shock isolation system for an inertial sensor arrangement, on the one hand, causes an advantageous moment of inertia by the special arrangement of the individual sensors, especially of the gyroscope used. On the other hand, an advantageous long interval of the required shock-absorbing components (“shock mounts”) is provided by the use of several tubular shells. A measurement device with this inertial sensor arrangement thus achieves improved accuracy and reliability.

Abstract: A Micro-Electro-Mechanical System closed-loop (MEMS) inertial device having a vertical comb drive that exhibits improved performance under vibration. The device includes one or more stator tines extending from a housing into a cavity formed by the housing. One or more rotor tines extend from a proof mass located in the cavity. The proof mass is joined to the housing by flexures which allow movement in the vertical direction. The rotor tines have a first length value in the direction of movement and the stator tines have a second length value in the direction of movement. The second length value is greater than the first length value. Also, the stator tines include two electrically separated portions. The lesser length of the rotor tines relative to the stator tines causes the attractive force between the rotor tines and either the upper or lower half of the stator tines to be relatively independent of rotor vertical position. This, in turn, produces better accelerometer accuracy in vibration environments.

Abstract: Devices for monitoring structural health conditions of host structures. A device includes at least one optical fiber sensor and an electronic module. The optical fiber sensor includes a rolled optical fiber cable operative to generate a frequency shift of a light signal passing therethrough and a coating layer applied to the rolled optical cable. The frequency shift is commensurate with vibration of the host structure. The electronic module sends an input light signal to the optical fiber sensor, receives a sensor signal from the optical fiber sensor, and processes the sensor signal.

Abstract: Both a method and apparatus for determining internal discontinuities or inhomogeneities in a green or fired ceramic honeycomb structure is provided. In the method of the invention, an ultrasonic transmitter is positioned adjacent to, but not in contact with, the honeycomb structure. The transmitter propagates an ultrasonic wave, of preferably less than 5 MHz, through the honeycomb structure which is received, filtered and analyzed to determine the presence or absence of internal discontinuities or inhomogenieties. The ultrasonic transmitter generates an ultrasonic wave of less than five megahertz to provide a relatively high signal-to-noise ratio in the ultrasonic wave propagated through the structure.

Abstract: Both a system and method for detecting the presence or absence of internal discontinuities or inhomogeneities in a fired or green ceramic honeycomb structure is provided. The system includes a membrane disposed over a surface of the honeycomb structure, at least one ultrasonic transmitter that engages the membrane and transmits ultrasonic waves into the honeycomb structure, a translation assembly connected to the ultrasonic transmitter for sliding said transmitter across said membrane in a predetermined pattern, and an ultrasonic receiver that receives a modulated response from the ultrasonic waves transmitted into the honeycomb structure. The membrane is preferably plastic sheet material, such as polyester, having a temporary adhesive on one side and a thickness that is about one-quarter of the wavelength of the ultrasonic waves in order to avoid attenuation of the modulated response.

Abstract: A technology for providing a small and inexpensive ultrasonic diagnostic apparatus which does not need a high resolution A/D converter, and has high sensitivity and a wide dynamic range is disclosed. According to the technology, an ultrasonic transducer unit 1 for transmitting and receiving ultrasonic wave is driven by a drive circuit 2 for generating a pulse signal. An echo signal received by the ultrasonic transducer unit is inputted to an analog low frequency band attenuator 3 which attenuates a low frequency band component. An output signal of the analog low frequency band attenuator is inputted to an A/D converter 4 which converts the signal to a digital signal. The converted and outputted digital signal is inputted to a digital correction filter 5 which intensifies the low frequency band component attenuated by the analog low frequency band attenuator and outputs a digital signal having a frequency distribution almost equal to that of the echo signal received by the ultrasonic transducer unit.

Abstract: A head of an ultrasonic probe is formed by joining a flexible sheet holding a plurality of ultrasonic transducers to a curved surface of a support. Concave-convex shapes (concave-convex surfaces) are provided on the curved surface of the support and a joining surface of the flexible sheet. The concave-convex surfaces correspond to each other, and are engaged with each other to determine relative positions of the flexible sheet and the support when they are joined. Each of grooves on the concave-convex surface is positioned between adjacent ultrasonic transducers.

Abstract: A method for detection of a variable parameter of a vehicle with the aid of a measurement device, by which measured values are evaluated as sensor signals of at least one sensor element which is arranged in the immediate vicinity of an actuating element with an electrical drive, in which no evaluation of the measured values is carried out or performed during an influencing time period between a time of a change in the electrical drive for the actuating element and a time in which this change is essentially still just exerting an influence on the measured values.

Abstract: The present invention relates to a pressure sensor. The pressure sensor includes a substrate assembly. The substrate assembly defines sealed channels and includes a conductive layer. A conductive membrane extends from the substrate assembly and is spaced from the conductive layer to form a sealed reference chamber. A cap defines apertures. The cap extends from the substrate assembly to cover the membrane and thereby form an apertured chamber.

Abstract: An object is to provide a liquid level sensor device for liquefied gas enabling measurement on a liquid level of liquefied gas having a boiling point in the vicinity of 21 K, e.g. liquid hydrogen, accurately and with good reproducibility and enabling simple production with good reproducibility. The present invention is a liquid level sensor device for liquefied gas including compound containing magnesium and boron arranged in succession in the longitudinal direction over the entire or a part of surface of a linear conductor made of metal and a portion of the compound thereof dipped in liquid is in a superconductive state at liquid level measurement.

Abstract: A test system for testing torque converters, other fluid coupling devices, and the like, e.g., devices that couple engine power to driveline power. The test system drives the test device with a first hydraulic motor, which is itself driven by a first hydraulic pump. At the output of the test device, a second hydraulic pump absorbs the power from the test device, and drives a second hydraulic motor, which in turn drives the first hydraulic pump. A make-up motor is used to also drive the first hydraulic pump, to make up for any additional power desired for testing.

Abstract: A force sensor chip having a multiaxial force sensing function is disclosed. The force sensor chip comprises a base member having an operating part provided with an external force application area, a supporting part for supporting the operating part, connecting parts for connecting the operating part and the supporting part, and strain resistance elements disposed in the connecting parts or within boundaries between the connecting parts and the operating part. The base member has a thin area formed with a small thickness, and the boundaries of the thin area are disposed in the supporting part and operating part.

Abstract: A method and apparatus for bearing thrust monitoring allows measurable detection of tilt of a support bearing (52 or 56) for a roller (34 or 36) which rotatably supports a rotating body (22). A tilt meter (75 or 77) adapted to measurably detect a tilt of the support bearing is coupled to the support bearing (52 or 56), where the tilt is defined as an angular difference in bearing orientation between a first bearing position and a second subsequent bearing position that is cause by an axial thrust on the rotary body (22). Once tilt is detected, the bearing orientation of the support bearing (52 or 56) can be adjusted to return the support bearing (52 or 56) to substantially the first bearing position.

Abstract: A piezoelectric sensor system includes a piezoelectric sensor for outputting an electric voltage in accordance with a mechanical external force, delaying apparatus for delaying the output from the piezoelectric sensor for a predetermined delaying time period, AC amplifying apparatus for applying AC amplification to the output from the piezoelectric sensor via the delaying apparatus, and determining apparatus for determining whether or not the external force is applied to the piezoelectric sensor, on the basis of the output from the AC amplifying apparatus and for determining whether or not the piezoelectric sensor system normally operates on the basis of the output from the AC amplifying apparatus during the delaying time period.

Abstract: A probe for sampling a soil gas comprising a body having a cavity to which is connected an inlet and an outlet, and a gas permeable waterproof membrane wrapped around the body and sealing the cavity. The membrane allows the soil gas to flow across the membrane from the soil to the cavity. A method for measuring soil gas diffusivity comprising the step of circulating in a closed loop a carrier gas substantially at an atmospheric pressure through a diffusion gas sampling probe inserted in the soil and through a sensor used for the measurement of a concentration of at least a component of the soil gas.

Abstract: Channel arrays are reversibly disposed over an array of microwells to deliver materials, for example, cells, to the microwells.

Abstract: The invention concerns a device and method for withdrawing samples of liquid samples for analytical elements. The device includes a carrier and a cover with a surface that cooperates with a surface of the carrier to form a channel. The channel has an opening defined by at least one edge. At least one notch in the form of a partial groove extends into the at least one edge of the opening so that one side of the edge of the opening is at least partially interrupted by the at least one notch. The notch forms a sample application opening by exposing the surface, whose extension forms an inner surface of the channel.

Abstract: A seismic cable (110) and a method for assembling such a seismic cable are disclosed. The seismic cable (110) includes a support cable (205) and a signal cable (210) attached to the support cable (205) at a plurality of points spaced along the length of the signal cable (210). The seismic cable (110) also includes at least one sensor module (220) disposed on the signal cable (210). The method includes attaching a support cable (205) to a signal cable (210) at a plurality of points spaced along the length thereof.

Abstract: A power starting dock for gyroscope is comprised of an outer housing that has a bottom and a concave head. The head is slanted at an angle relative to the housing, and engages a gyroscope rotor, an electric power source on the housing, a spring-mounted motor on the housing connected to the power source for producing a rotational power in response to a switching force, and a power rotor fastened to the motor and protruding into the concave head of the housing. The power rotor serves to resiliently transmit rotational motor power to the gyroscope rotor.

Abstract: A quick connect power take-off assembly adapted for an all-terrain vehicle (ATV). The quick connect power take-off assembly includes a housing, a driving assembly that is fixedly mounted to the ATV, a driven assembly that is releasably connected to the driving assembly, and either directly to an implement or to a power transfer assembly. The power transfer assembly includes a rotationally-driven power transfer assembly and a second slip joint coupler connected to the input shaft of the power transfer assembly, and a quick connect plate on the engine-facing side of the rotationally-driven power transfer assembly. The quick connect plate is releasably connected to the power transfer assembly on an outwardly facing side and releasably connected to the second slip joint coupler on an engine-facing side thereof. The power transfer assembly is axially engaged with the engine shaft and receives rotational energy there from.

Abstract: Provided is a motion converter which comprises a housing, a earn plate reciprocal to the housing, a lower link and an upper link. The cam plate has a groove which extends diagonally across the width thereof. The lower link is pivotably mounted to the housing and has a cam pin and a slot formed at a free end thereof. The cam pin is engageable to the groove of the cam plate. The upper link is also pivotably mounted to the housing in offset relationship to the lower link. A free end of the upper link has a link pin which is engageable to the slot. The motion converter is configured such that the lower link pivots in response to slidable movement of a cam pin within the groove during reciprocation of the cam plate. The upper link is configured to pivot in response to the slidable movement of the link pin within the slot during pivoting in a lower link.

Abstract: A sliding device 1 is constituted of a swash plate 3 including a first sliding surface 3A and a semispherical shoe 4 sliding with the swash plate 3. The swash plate 3 is constituted of a base material 3B of high strength brass containing Mn and Si, and very small granular Mn—Si compounds 6 are exposed on an inside of the base material 3B and on the first sliding surface 3A (surface of the base material 3B). The above described swash plate 3 increases in exposure amount of the Mn—Si compounds 6 exposed on the first sliding surface 3A being the surface by applying etching to the base material 3B after cutting the base material 3B. The sliding device 1 which is favorable in seizure resistance at low manufacturing cost as compared with the conventional sliding devices can be provided.

Abstract: A lift actuator comprises a sun screw having a longitudinal axis and being restrained from rotation about the longitudinal axis of the sun screw, at least one planetary screw having a longitudinal axis and being in thread engagement with the sun screw, and a drive nut having a longitudinal axis coincident with the longitudinal axis of the sun screw and being in thread engagement with the planetary screw. The drive nut is mounted for rotation about the longitudinal axis of the drive nut but is restrained from translation along the longitudinal axis of the drive nut. When the drive nut is rotated by a rotational energy source, the drive nut drives the planetary screw to rotate and thereby translate axially relative to the drive nut, and the rotating planetary screw in turn causes the sun screw to translate axially relative to the rotating planetary screw.

Abstract: A dual-clutch powershift transmission for use in a motor vehicle having an engine and a driveline includes an output shaft adapted for connection to the driveline, first and second input shafts, a first engine clutch operable for establishing a releasable drive connection between the engine and the first input shaft and a second engine clutch operable for establishing a releasable drive connection between the engine shaft and the second input shaft. A first constant-mesh gearset is driven by the first input shaft. A second constant-mesh gearset is driven by the second input shaft. A first shift clutch releasably engages the first gearset to establish a drive connection between the first input shaft and the output shaft. A second shift clutch releasably engages the second gearset to establish a drive connection between the second input shaft and the output shaft.

Abstract: The invention relates to a revolving toothed gear with at least two meshing gearwheels, one of which is a gearwheel that turns by means of a sliding joint and is mounted on a pin in a manner that permits rotation. To this end, the pin is a hard metal pin. The present invention increases the operating life of the gearwheel.

Abstract: A speed changing structure for a work vehicle, comprising a travel speed changing device having a plurality of speed change positions, a manually operated speed changing lever (63), control means (64) for controlling the travel speed changing device, and a manually operable operating part (65) provided to the speed changing lever (63), wherein the control means (64) has a first speed changing mode for operating the travel speed changing device in single steps so as to follow the operation of the speed changing lever (63), and a second speed changing mode for operating the travel speed changing device without passing through intermediate speed change positions to a speed change position that corresponds to the operating position after the speed changing lever (63) has been moved from the speed change position that corresponds to the operating position prior to the speed changing lever (63) being operated; and the control means (64) operates the travel speed changing device in the first speed changing mode when

Abstract: Disclosed is an XY stage comprising a moving table, a first guide mechanism to guide the moving table in a predetermined direction, a moving body mounted to the moving table, a second guide mechanism to guide the moving body in a direction intersecting with a guiding direction of the first guide mechanism with respect to the moving table, a drive mechanism to drive the moving table in the guiding direction of the first guide mechanism, and a converting mechanism to convert motion of the moving table in the guiding direction of the first guide mechanism into motion of the moving body in a guiding direction of the second guide mechanism.

Abstract: A tilt-type steering apparatus equipped with a radial fixed gear includes a column housing enclosing a steering shaft; a mounting bracket formed on a side of the column housing; a tilt shaft formed on the column housing; a fixed gear formed on an outer peripheral surface of the mounting bracket, the fixed gear being radially formed around the tilt shaft; an adjustment bolt extending through the mounting bracket and the fixed gear; a tilt bracket coupled to the tilt shaft and to the adjustment bolt, respectively; a movable gear meshing with the fixed gear, the movable gear being coupled to an end of the adjustment bolt; an adjustment lever formed on a different end of the adjustment bolt; and a cam driven according to operation of the adjustment bolt. The reduced number of components improves the convenience of assembly and maintains rigidity, even after assembly.

Abstract: The disclosure relates to a pedal support for a vehicle, comprising a bracket (9) which is secured in a bulkhead disposed in the vehicle between the passenger compartment of the vehicle and the engine room; a first shaft (3) secured in the bracket and horizontal and transversely directed in relation to the direction of travel of the vehicle; a pedal arm (2) provided with a footplate (23) and pivotal about the first shaft; an operating device (22) which is secured in the arm (2) a distance from the first shaft and which is disposed for manoeuvring or controlling a vehicle function, for example a braking function.

Abstract: The present invention relates to an adjustable pedal device including at least two pedals whose initial position is variable. A pedal device is disclosed wherein a control member is rotatably articulated at the pedal lever for the brake, while the lever is rotatable about a third axis. It is disadvantageous in the prior art construction that a second pedal, particularly an accelerator pedal, cannot be simultaneously adjusted according to said principle because the forces acting upon the individual pedals are not effective in the same direction. The invention relates to a pedal device which has a simple design and in which the initial position of the mentioned two pedals can be adjusted in a substantially uniform manner, the two pedals being mounted in a twistable mounting support while being rotated about axes that are offset one relative to the other.

Abstract: A bar-mounted or handle-mounted rotary-to-linear actuator is adapted for operation by hand via a Rotatable Assembly. A motorcycle control mechanism can be manually actuated via a Rotatable Assembly. A short-stroke rotary-to-linear actuator is adapted for operation by hand via a Rotatable Assembly. A low-displacement rotary-to-linear actuator is adapted for operation by hand via a Rotatable Assembly.

Abstract: A gear pump for an axle assembly circulates lubricating fluid from a reservoir to a fluid cooler external to the axle assembly. The gear pump includes a first housing section and a second housing section and a center section located between the first and second housing sections. An input gear mounted on an input shaft is engaged with a reduction gear, which are located in a first housing section. Two pumping gears are located in the second housing section. The center section serves as a wall and separates the first housing section from the second housing section. The gear ratio between the input gear and the reduction gear is such that the pumping gears rotate at a speed between at about 47% and at about 75% of the speed of the input shaft.

Abstract: A rigid internal gear and a flexible external gear of a wave gear drive are spur gears of module m. The number of teeth of the external gear is smaller by 2n (n is a positive integer) than that of the internal gear. The deflection of the major axis of the elliptical rim neutral line on the principal cross-section of the external gear is set at 2K mn (K<1). On the principal cross-section, the meshing of both gears is approximated by rack meshing. The locus M of movement of a tooth of the external gear caused by the rotation of a wave generator is determined. A part AC of the locus M of movement from the inflection point A of the locus M of movement to the deepest position B of meshing is determined on the entering side of meshing of the teeth toward the major axis of the locus M of movement.

Abstract: Described herein is a servo for a gear change provided with a control shaft; the servo has: a first actuator, which displaces the control shaft axially along a central axis thereof and is directly coupled to the control shaft; and a second actuator, which renders a cam engaged by a pin projecting from the control shaft angularly fixed to a fixed frame to cause rotation of the control shaft about its central axis during the axial displacement; a cylindrical tubular element is provided, which is coaxial to the control shaft, receives inside it an end portion of the control shaft, supports the cam, and is pushed axially by the second actuator against the fixed frame.