Abstract: An indexing mechanism for a fluid spray gun may include, but is not limited to: a first detent magnet including: one or more radial portions having a first polarity; one or more radial portions having a second opposite polarity; and a central aperture, a second detent magnet including: one or more radial portions having the first polarity; one or more radial portions having the second opposite polarity; and a central aperture, wherein one or more radial portions of the first detent magnet are configured to align with one or more radial portions of the second detent magnet having an opposite polarity to retain the relative rotational positions of the first detent magnet and the second detent magnet.

Abstract: A method and circuit for acquiring an output quantity of a linear resonance actuator are disclosed. The method comprises the steps of: establishing a circuit that simulates the linear resonance actuator by using passive electrical devices according to an electrical parameter and a kinematic parameter of the linear resonance actuator, the passive electrical devices comprise at least a resistor, a capacitor and an inductor; selecting a measuring point in the circuit according to an output quantity that the linear resonance actuator needs; and inputting a driving signal of an input source to an input end of the circuit, and collecting an electrical signal that is outputted at the measuring point to obtain the output quantity of the simulated linear resonance actuator.

Abstract: A pivot motor has a stator and an armature. The armature has an assembly of two spaced permanent magnets and a triangular flux bridge on one end. Magnetic flux is generated by passing alternating current through an electrical coil in the stator. The flux flows through the permanent magnets to generate electromotive force that vibrates the armature. The triangular flux bridge adjacent the magnets facilitates the flux flow, increasing motor power under typical load conditions and motor efficiency.

Abstract: A mobile induction and power-generation device includes a disc-shaped magnet, a block magnet, and a coil. The block magnet has at least one magnetic pole set each having two adjacent magnetic poles with opposite polarities, and the at least one magnetic pole set moves along a movement trajectory relative to the disc-shaped magnet. The coil is disposed adjacent to the disc-shaped magnet or the block magnet, is induced by an alternating magnetic field generated by the movements of the disc-shaped magnet or the block magnet, and generates an induction current due to the alternating magnetic field.

Abstract: A vibration generator includes a housing, a vibrating body, and a leaf spring. The leaf spring includes a connection portion connected to the vibrating body at one longitudinal end of the leaf spring, an attachment portion attached to a circumferential wall portion at the other longitudinal end of the leaf spring and an intermediate portion formed between the connection portion and the attachment portion to extend around the vibrating body. The connection portion and the attachment portion are arranged along a direction intersecting a vibration direction of the vibrating body at the opposite sides of the vibrating body. The intermediate portion is arranged in an outside region around the vibrating body to extend across the vibration direction of the vibrating body.

Abstract: A magnetic vibrator including a first magnetic portion and a second magnetic portion is disclosed. The first magnetic portion includes an inner plate, a first magnet and a second magnet. The inner plate is disposed between the first magnet and the second magnet. The second magnetic portion includes a coil and a wrapper. The coil is disposed around the first magnetic portion and wrapped in the wrapper. The wrapper has a gap corresponding to the inner plate. An interval is configured between the first magnetic portion and the second magnetic portion. When a current is occurred in the coil, the first magnetic portion and the second magnetic portion are actuated to move axially with respect to each other.

Abstract: A device for generating electrical energy has at least one pair of permanent magnets and at least one coil. They are moved about a pivot axis relative to one another by agitating or shaking. Each coil is disposed between the pole surfaces of the at least one pair of permanent magnets which are disposed opposite each other.

Abstract: Disclosed is a linear vibrator, the linear vibrator including: a bottom case including a floor plate and first and second elastic units integrally formed with the floor plate, and mutually and oppositely bent from both distal ends facing the floor plate; a stator including a circuit substrate arranged on the floor plate and a coil block electrically connected to the circuit substrate; a trembler including a magnet discretely facing the coil block and a weight securing the magnet; and an upper case coupled to the bottom case to accommodate the stator and the trembler, wherein both lateral surfaces of the trembler facing the first and second elastic units are elastically supported by the first and second elastic units.

Abstract: A rotary and linear motion device includes a magnetic stator assembly, opposed electromagnetic actuators, and a linear-to-rotary converter (e.g., cam). Each electromagnetic actuator includes a coil that is configured to reciprocate relative to the magnetic stator assembly or to linearly translate in a common direction relative to the magnetic stator assembly. The electromagnetic actuators are coupled to the linear-to-rotary converter and upon reciprocation or linear translation, drive the linear-to-rotary converter in rotary or linear motion. The device may be located inside a wheel, which may be part of a vehicle. If part of a wheel of a vehicle, the device can be used to provide propulsion, steering, braking, and suspension for the vehicle.

Abstract: A linear vibration device is disclosed. The linear vibration device includes a housing, a plurality of elastic members received in the housing, each of the elastic member has a fastening portion connecting to the housing, an elastic arm extending from the fastening portion, and a mounting portion extending from the elastic arm, a moving unit suspended in the housing by the elastic members, a coil located below the moving unit, a supporting portion coupling to the elastic member, the supporting portion has a supporting plate covering at least a part of a top surface of the moving unit and a supporting arm extending downwardly from the supporting plate for pushing the mounting portion toward the positioning portion of the moving unit, the mounting portion has a fender defining a top part above the top surface of the moving unit for restricting the position of the supporting plate.

Abstract: An electric energy generator from a vibrational field includes a body of non-ferromagnetic material, at least one pair of permanent magnets pivotally hung from the body in such a way that they are arranged therebetween. The magnets have faces of equal magnetic polarity turned to each other from opposite sides of the body, whereby a repulsive force is established between the magnets tending to keep them spread apart in an equilibrium position. A plurality of electric coils is arranged on the surface of the body so as to intercept the magnetic field generated by the magnets. The body is configured to be connectable to a vibration source, the vibration contrasting the repulsive force and causing an oscillation of the magnets about the equilibrium position, thereby generating a magnetic flux variation and thus an electric power production as an output from the electric coils.

Abstract: Disclosed is a vibration motor for a portable terminal, including a flat spring; a cylindrical magnetic substance mounted on the flat spring; an annular magnetic substance disposed around the cylindrical magnetic substance mounted on the flat spring; and a coil disposed between the cylindrical magnetic substance and the annular magnetic substance, wherein the magnetic substances perform a linear reciprocal movement by the electromagnetic force generated between the magnetic substances and the coil and by the elastic force of the flat spring as an electric current is applied to the coil. The vibration motor operates at higher resonant frequencies than those of conventional vibration motors, thereby improving the sense of an after-vibration and realizing a delicate haptic feedback function.

Abstract: A voice coil motor includes a lens retainer, a wire, and an elastic electrode member. The lens retainer includes an end portion. The wire wraps around the lens retainer and includes a first end and a second end. The elastic electrode member is metal and is mounted to the end portion. The elastic member includes a first elastic metal sheet and a second elastic metal sheet. The first elastic metal sheet includes a first electrode. The second elastic plate is physically separated from the first elastic sheet and includes a second electrode. The first end and the second end are respectively soldered to the first electrode and the second electrode.

Abstract: A plate spring includes holding section, first attached section, second attached section, first spring section connected between the holding section and the second attached section, and a second spring section connected between the first fixed portion and the second fixed portion. The holding section has a first edge, second edge opposite to the first edge, and a third edge. The first attached section is positioned adjacent to an intersection of the third edge and the second edge. The second attached section is positioned adjacent to an intersection of the third edge and the first edge. The first spring section has a wavy configuration and extends from an end of the first edge to the second attached section. The second spring section also has a wavy configuration and extends from an end of the second to the first attached section. The present disclosure also provides a voice coil motor.

Abstract: A spring plate includes an engaging portion, a connecting portion, a first elastic portion, a second elastic portion, a first fixing portion, and a second fixing portion. The first elastic portion and the second elastic portion are connected to the engaging portion and the connecting portion, the first fixing portion and the second fixing portion are formed on opposite ends of the connecting portion. The engaging portion defines a recess. The present disclosure further provides a voice coil motor using the spring plate.

Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising a substantially annular high-permeability core, the core including at least one magnet therein to define a magnetic circuit, at least one rotatable bearing mounting the core to at least one bearing support, the at least one bearing permitting the core to pivot about a pivot axis, a gap provided in the core, a body of high-permeability material located in the gap, the body being spaced from respective end faces of the core by a respective spacing whereby pivoting movement of the core about the pivot axis causes relative movement between the end faces of the core and the body, and a rotationally fixed coil surrounding a length of the core coaxially with the pivot axis.

Abstract: The present invention provides an ultrasonic motor including a wire having a coiled stator at one end thereof, a vibration generating device disposed at another end of the wire, a moving member that is in contact with the stator, a guide member that guides the rotation of the moving member, and an elastic member that covers the periphery of the wire. Accordingly, the driving efficiency of the ultrasonic motor that has a simple structure and that can be easily downsized can be enhanced and the performance stability thereof can be realized.

Abstract: There is provided a small-sized vibration generator that resonates at two different frequencies. A movable base is housed inside a case. The movable base has an installation plate, and supporting plates bent at right angles from both ends of the installation plate. A first elastically deformable portion is formed integrally with the installation plate, and a weight body is supported by the first elastically deformable portion. In the movable base, a second elastically deformable portion is provided between the installation plate and the supporting plates, and the supporting plates are fixed to supporting end plates of the case. The bending elastic modulus of the second elastically deformable portion is higher than the bending elastic modulus of the first elastically deformable portion, and resonates at two natural frequencies when a driving force is applied to the weight body by a magnetically-driven portion.

Abstract: A magnet rotor includes a drive arm with a rotary shaft, and an anisotropic permanent magnet having an axis of magnetization. The drive arm is composed of a light transmitting resin. The magnet has a cylindrical shape with a hollow center portion through which the rotary shaft is disposed. The drive arm and the permanent magnet are bonded together by a light curable resin adhesive.

Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator including a cantilever spring having a fixed end, a free end and a central portion therebetween, a mount for the cantilever spring to which the fixed end is fixed, a mass located at the free end of the cantilever spring, the mass including either a coil or at least one magnet defining a region of magnetic flux, wherein at least one of the fixed end and the free end of the cantilever spring is substantially stiffer than the central portion of the cantilever spring.

Abstract: An autonomous-power radio device including an electromagnetic energy transducer having a permanent magnet (1), a soft-magnetic element (9), an electrical coil (6), and stop points (8a-8d). The electrical coil surrounds a part of the magnetic circuit, wherein the permanent magnet (1) and said soft-magnetic element (9) are arranged to form a magnetic circuit with a first flux direction. At least one of the soft-magnetic element (9) and the permanent magnet (1) is mounted for rotary movement about an axis (4) with respect to the other. End points of the rotary movement are formed by the stop points (8a-8d).

Abstract: A toothbrush drive includes a first drive component for generating a magnetic field and a second drive component driven in both a translational and rotational manner under the influence of the magnetic field. A transmission element is deflected out of a predetermined position for transmission of both translational and rotary movement of the second drive component. The deflection of the transmission element varies along its longitudinal axis. A transmission element can be deflected out of a predefined position for transmission of a translatory movement and a rotational movement of the second drive component to the brush element along a longitudinal axis of the transmission element. The deflection of the transmission element out of the predefined position is varied along the longitudinal axis of the transmission element.

Abstract: The present invention pertains to vibration devices that do not require a rotating mass. In accordance with aspects of the invention, a coil causes a plunger to move linearly. A spring device is coupled to one end of the plunger. Activation of the coil causes the plunger to move in a first direction relative to a body and coil deactivation enables the spring device to move the plunger in an opposite direction relative to the body. Activating the coil at a predetermined frequency causes vibration of the plunger. Vibratory forces are transferred via the spring device and coil onto the body at predetermined locations. Opposing spring devices may be affixed to either end of the plunger. Spring devices may be linear or non-linear. Such spring devices may be used in conjunction with magnetic spring devices. A controller and a driver circuit may be used to control system operation.

Abstract: A vibrator has a cup-shaped casing, a substrate provided to close an upper end opening of the casing, a magnetic circuit assembly provided in the casing, a first suspension and a second suspension that support the magnetic circuit assembly from above and below, and a voice coil secured to the substrate and inserted into a magnetic gap in the magnetic circuit assembly. The first suspension has an inner fixed portion that is secured to the substrate and that has a radially inner ring-shaped portion and a pair of extensions extending radially outward from mutually diametrically opposing positions on the ring-shaped portion. The first suspension further has a pair of leaf spring portions arcuately extending from the respective extensions through an angle of about 270 ° in symmetry to each other around the axis of the voice coil.

Abstract: An electromechanical generator for converting mechanical vibrational energy into electrical energy, the electromechanical generator comprising a housing, an electrically conductive coil assembly fixedly mounted in the housing, the coil assembly having radially inner and outer sides, and upper and lower edges, thereof, a mount for the coil assembly extending inwardly of the radially inner side for fixing the coil assembly in a fixed position in the housing, a magnetic core assembly movably mounted in the housing for linear vibrational motion along an axis, and a biasing device mounted between the housing and the magnetic core assembly to bias the magnetic core assembly in opposed directions along the axis towards a central position, wherein the magnetic core assembly encloses the electrically conductive coil assembly on the radially outer side and on the upper and lower edges, and on a part of the radially inner side, the magnetic core assembly having a gap on a radially inner portion thereof through which the

Abstract: An electromagnetic exciter includes a first suspension having a cylindrical side wall portion coaxial with respect to a cylindrical wall of a yoke of a magnetic circuit assembly, and a spring portion integrally formed at the lower end of the cylindrical side wall portion to support the lower end of the magnetic circuit assembly so that the magnetic circuit assembly is vibratable. An annular support member is secured to the inner peripheral surface of the upper end opening of the cylindrical side wall portion of the first suspension. A printed wiring board that supports a voice coil is supported on the annular support member. A protector has a cylindrical portion installed to cover the outer peripheral surface of the cylindrical side wall portion of the first suspension, and a caulking portion that is bent radially inward over the upper end edge of the cylindrical side wall portion of the first suspension to clamp the printed wiring board between itself and the annular support member.

Abstract: A direct-acting actuator is provided comprising a stator section (16), an attachment section (6) secured to the stator section, micro-beams (8, 10) extending from the attachment section, a rotor section (12) supported for swing motion by the micro-beams, a permanent magnet (18) disposed in the stator section, and a coil (4) disposed in the rotor section. Electric current is conducted through the coil in the magnetic field created by the permanent magnet for causing the micro-beams to be displaced for inducing swing motion of the rotor section. The actuator can be assembled to a small size, typically a width of 1-10 mm, a length of 1-10 mm, and a height of 0.1-5 mm.

Abstract: In an electromagnetic driver according to the invention, electromagnetic units are arranged in the axial direction of a shaft, and a power supply change-over device is so formed that, when an attractive magnetic field arises between the coil unit and the magnetic unit of the one of the electromagnetic units, a repulsive magnetic field is generated between the coil unit and the magnet unit of the other of the electromagnetic units. As the polarity is alternately changed over by the power supply change-over device when a direct current is supplied to the exciting coils of the electromagnetic units, the coil unit or the magnetic unit reciprocates, and further the shaft reciprocates in the axial direction.

Abstract: A linear oscillating actuator gives a smooth reciprocatory movement with a minimum of incidental vibrations or stresses. The actuator includes an oscillator carrying a permanent magnet as well as an output shaft which is adapted to be connected to drive a load, and a stator assembly carrying an electromagnet. The electromagnet generates a magnetic field which interacts with the permanent magnet to reciprocate the oscillator relative to the stator assembly in a linear path. A spring link is provided to resiliently support the oscillator to the stator assembly with a gap distance left therebetween for allowing the oscillator to reciprocate in the linear path. The spring link is configured to deform resiliently also in a direction other than along the linear path so as to allow the oscillator to move to and away from the stator assembly or to twist relative to the stator assembly.

Abstract: A magnetic actuator. A yoke includes a first opening and a second opening, a frame, and a path. A first magnet is disposed in the first opening in the vicinity of the frame. A second magnet is disposed in the second opening in the vicinity of the frame. A coil comprises a wire surrounding the path. A light shield is connected to an end of the coil. A guiding element disposed outside the path is connected to an end of the coil. When current passes through the coil, the coil moves along the path by magnetic induction between the first magnet and the second magnet such that the iris diaphragm is adjustable by the light shield. When there is no current through the coil, dynamic force produced by the guiding element returns the light shield to its original position.

Abstract: The apparatus for converting side-to-side to rotational motion for a workpiece includes a spring assembly with a movable base mounting element which is driven in a slightly arcuate reciprocal side-to-side motion and a fixed mounting element spaced apart from the base element and mounted in the appliance so that it does not rotate or move in operation of the apparatus. A spring member, such as two planar leaf springs positioned at an angle to each other, is mounted between the movable base element and the fixed mounting element. A drive shaft member extends from the movable base element through the fixed mounting element and beyond. A workpiece such as a brushhead is mounted on the distal end of the drive shaft. The spring member is configured so that it is substantially less resistant to twisting action than bending action, such that the side-to-side motion of the base element results in rotation of the workpiece.

Abstract: A magnetic motion device is disclosed, wherein a permanent magnet slides back and forth along a pivoting rail due to the interaction between the slide's magnetic field, the magnetic fields produced by a permanent/electromagnet combination at each end of the rail, and gravitational force. The ends of the rail thereby move up and down in a reciprocating, “see-saw” fashion. Power-take-off mechanisms can be connected in any suitable manner to the device, so that the motion of the rail can power an external device such as a pump.

Abstract: An improved linear actuator incorporates a DC motor whose stator is secured to a frame is provided for. To improve operational longevity and reliability of a linear actuator, the improved actuator includes a retention clutch and an axial load limiter. An axially configured retention clutch is configured to slidably fit within the open inner channel diameter of an axial load limiter and over a motor shaft of a linear actuator. In operation, the retention clutch reduces the impact loads on the stop and extending the fatigue life of these wearable components. Similarly, when the screw encounters axial loads during operation, these loads are distributed across both the axial load limiter and the motor, thereby reducing direct forces on the motor and contributing to an extended use of the motor component.

Abstract: A linear actuator incorporates a DC motor whose stator is secured to a frame. A shaft is coupled to the rotor of the DC motor one end of which is circumferentially coupled to the inside of a torsion spring and the outer section of the torsion spring is coupled to the frame. The center section of the shaft is circumferentially raised creating first and second shaft stops. The middle of the shaft is threaded and threadedly coupled to a translating actuator which has a radial raised portion which engages a section of the frame. The radial raised section provides a radial stop and prevents the translating actuator from rotating. Additional radial raised portions on the translating actuator create first and second stops that engage the first and second shaft stops at each extreme of travel. The first stop keeps the threads from binding in a retracted position and the second stop keeps the threads from binding in the extended position.

Abstract: A motor having two degrees of free motion includes: a motor casing; a combined core of cylindrical shape having a plurality of inner teeth inside and a plurality of outer teeth outside and fixedly coupled inside the motor casing; a first coil winding wound on the inner teeth of the combined core; a second coil winding coil wound on the outer teeth of the combined core; a rotating armature having a permanent magnet inside inserted inside the combined core and rotated by an interaction of a magnetic flux formed by the first coil winding and the permanent magnet; a linear armature located at one side of the second coil winding undergoing a linear movement by the flux formed by the second coil winding; a driving shaft penetratingly coupled to the rotating armature and to the linear armature and undergoing rotating and linear movements therewith; and a spring urging the linear armature away from the combined core.

Abstract: An apparatus for controlling the tension of a traveling yarn includes a rake tensioner having stationary and displaceable yarn tensioning elements in engagement with the traveling yarn, and an electrical coil to which electrical current is supplied by a regulating device. The displaceable yam tensioning elements and the electrical coil are disposed on a common pivot lever. The electrical coil is pivotable in an air gap through which magnetic field lines pass. The tension of the traveling yarn is controlled as a function of the current supplied to the electrical coil. The present invention, thusly, improves the control of the tension of the traveling yarn in spinning or bobbin winding machines.

Abstract: A yarn guide imparts a traversing motion to a yarn being delivered to a rotationally driven takeup bobbin in a textile yarn winding operation to create a cross-wound bobbin, or cheese. The yarn guide includes a fork-like yarn guide pivoted about a pivot axis substantially perpendicular to the axis of the takeup bobbin, and an electromagnetic mechanism for driving the guide. The electromagnetic mechanism includes an air gap, a plurality of magnets disposed along the air gap, a plurality of yokes and at least one electrical coil extending into and moveable along the air gap with the traversing yarn guide. The magnets are disposed along the air gap and generate magnetic field lines which extend in a substantially perpendicular direction through the air gap.

Abstract: A magnetic attraction driving engine utilizing a permanent magnet is provided with a permanent magnet, an electromagnet formed by winding a coil on a magnetic core with one end thereof stuck to one magnetic pole end of the permanent magnet, an excitation controller for exciting the electromagnet to change a state of magnetic fluxes in the vicinity of the magnetic pole end of the permanent magnet, a movable member having magnetic attractivity set in the vicinity of the magnetic pole end of the permanent magnet by being supported and guided so as to be capable of coming close to or separating away from the permanent magnet and a returning force applying member for causing by pressure the movable member to retreat against a magnetic attracting force and move back and forth by changing a magnetic attracting force of the permanent magnet.

Abstract: A vibration generator in a pager or massage device for giving vibration to the user including a coil fixed to a base and a movable member vibratably supported on the base. The movable member has inner and outer yokes defining therebetween a magnet gap in which the coil is inserted and a magnet for causing magnetic flux in the magnetic gap. A parallel four-bar linkage structure with a cantilevered leaf spring, a turnover leaf spring, or two diaphragm springs supports the movable member on the base.

Abstract: A smart battery charger system including a smart battery charger that responds to charging instructions of a smart battery. The smart battery includes a memory that stores battery-specific charging characteristics. The smart battery determines a desired charging voltage and desired charging current based on measured environmental conditions, such as battery temperature, and the charging characteristics. A bus allows the smart battery to communicate the desired charging voltage and charging current to the smart battery charger. The smart battery charger generates the actual charging voltage and charging current in response to the desired charging voltage and charging current. In this manner the smart battery can control its own charging. Charging can be optimized according to a particular smart battery's charging characteristics and requirements.

Abstract: An electromechanical exciter for use in driving a vibratory conveyor includes a non-linear spring system which provides an increase in spring force as the stroke of the electromagnet increases.

Abstract: A contact lens cleaning system comprises a container for receiving a quantity of cleansing fluid and a contact lens therein and a vibrator including a vibration generator and a vibration transmitting assembly for transmitting vibration from the vibration generator to a predetermined portion of the container. The container includes fluid agitator components including a resilient diaphragm comprising the just-mentioned predetermined portion, which resilient diaphragm is locatable for contact with the vibration transmitting assembly so as to transmit vibration therefrom to an agitator member immersed within the cleansing fluid.

Abstract: A reciprocating armature motor for electrically driving equipment such as a piston pump for a paint spray gun or a diaphragm compressor characterized by a stator having a solenoid, an armature pivotally mounted at one end to the stator and having a second end acting upon a member of the equipment to be actuated to move the member back and forth along a path when the armature moves relative to the stator with a reciprocating motion and an arrangement for controlling the reciprocating motor of the armature including a coupling link forming a positive link between the armature and a stationary element which coupling link moves depending on the reciprocating motion of the armature. In one embodiment, the coupling link is composed of a pair of pivotally connected arms forming an articulated link which interconnect the armature to the stationary element and coact with a stop to limit the movement of the armature toward the stator.

Abstract: A digital linear actuator capable of converting pulsed electrical current into positive and precise increments of linear motion. The actuator includes a threaded shaft which is prevented from rotating, a cylindrical rotor threaded on the shaft, and drive means spaced from the rotor and operative in response to a pulse of electric current to engage the rotor and turn the rotor through a predetermined arc, thereby causing linear motion by either the rotor or the shaft in the direction of the longitudinal axis of the shaft. Preferably the rotor circumference is toothed, and the drive means include an electromagnet which, when energized by a pulse of current, causes movement of a pivoted finger; when the finger moves, a flexible reed attached at one end thereof engages one of the rotor teeth and causes rotation of the rotor.

Abstract: A magnetic motor machine is provided in a compact housing and comprises a pair of electromagnetics rigidly attached within said housing in spaced apart relationship. Electronic circuits and power supplies are provided for each of said electromagnetics. The electronic circuits and power supplies have turn-on switches as well as a micro switch which, upon activation of same, alternatively makes and breaks the circuits for each of the electromagnetics. A yoke is positioned between the electromagnetics by a support shaft which is mounted on a bearing for movement thereabout.

Abstract: In combination, a water bed frame with side boards, a water filled flotation mattress within the frame, an electromagnetic vibrating transducer unit between a side board and the mattress and operable to generate and transmit motion into the mattress and an adjustable power supply connected with a 60 Hz. domestic power service and delivering current at a fixed frequency and at sub-harmonic frequencies of said fixed frequency to the unit; said unit includes an elongate resilient armature with front and rear end mounting means and fixedly mounting the rear end portion of the armature, an electro-magnetic driver fixedly mounted in predetermined working relationship with the rear end portion of the armature and receiving power from the power supply and a tuning weight on the front end portion of the armature to increase the mass thereof and shiftable longitudinally to tune the natural frequency of the armature into synchronism with the frequency of the power delivered to the driver.

Abstract: The present invention has as an object the provision of an electromechanical analogic display device for electronic chronometers, comprising at least an electromagnetic motor controlled by an electrical impulse of short duration. The attractive influence of the latter distorts a spring, very rapidly storing the produced energy to release it in the form of kinetic energy and driving a toothed wheel coupled to the analogic display while on the other hand this electromagnetic motor activates a locking system permitting the passage of a single tooth per cycle, and thus assures for said device immunity from mechanical shocks and most particularly from tangential accelerations.

Abstract: Device for supplying fuel to the atomizer of a combustion engine comprises at least a pump to be connected with the atomizer having a piston-bounded pump chamber and an electromagnet for reciprocating said piston.Said device is improved, particularly with regard to the seal of the pump piston, the control and the adjustment of the pumped quantity of fuel, the life-time and the cooling of the device, the compactness and simplicity of construction and/or simplification of maintenance.

Abstract: An electric motor of the kind in which an oscillating element carries a magnet which is coupled magnetically to a rotor to transmit drive thereto. The electrical driving signals for the oscillating element, derived for example from a divided-down quartz crystal oscillator, have a frequency f which is f/2Q less than the natural resonant frequency of the oscillating element, where Q is the Q factor of the element, to maintain drive of the latter for all variations in natural frequency due to ambient changes.

Abstract: Several embodiments of a rotary indexing mechanism having either an angularly reciprocable or rectilinearly reciprocable input, an output rotary friction drum and a one-way drive interconnect system between the input and friction drum comprising a drive line wrapped about the friction drum having one end connected to the reciprocable input and a line tensioning spring connected between the other end of the drive line and the reciprocable input and whereby the input is adapted to be actuated in one direction to draw the drive line from the friction drum and rotate the friction drum in one angular direction and to be actuated in the reverse direction by the tension spring to pay out the drive line to the friction drum and thereby uncouple the drive line from rotating the friction drum in the reverse angular direction.