Abstract: A high-speed impact hammer type solenoid capable of operating at high speed such as 500 to 1000 strokes per second and with a relatively long stroke length. It is housed in a cylindrical shell and includes two separate coils and magnetic circuits operating on a single short plunger. The plunger is driven magnetically in both directions. The short plunger has reduced mass. This is made possible by elongated backstops extending through the coils to the plunger and by a flux washer extending from the shell to the plunger. Close control of the plunger stroke is achieved by a non-magnetic sleeve surrounding the plunger and spacing the backstops which are screw threaded into the shell. Resilient anti-residual pads on each side of the plunger absorb the impact of the plunger with the backstop, start the plunger in the opposite direction and speed up the decay of the magnetic field.

Abstract: An improved fuel injector for an internal combustion engine which produces highly accurate fuel delivery control by providing a precise closing of the valve without secondary openings caused by rebound or bouncing of the valve from its seat surface after initial closing. Valve rebound is eliminated by a hydraulic cushion formed between parallel surfaces of the movable valve and its stationary guide whereby a thin boundary layer of liquid fuel caught between closely spaced surfaces is compressed just prior to engagement of the valve with its valve seat. This generates an opposing force to the force tending to close the valve.

Abstract: An improved fuel injector for an internal combustion engine with structure which produces a counterforce on the injector valve subsequent to valve closing to inhibit substantial rebound movement of the valve away form its seating surface as caused by the impact of valve closing accompanied by elastic deformation of a valve and its seating surface. The counterforce is generated by creation of a reduced fluid pressure between closely spaced and parallel surfaces, one on the movable valve and the other on the stationary valve guide.

Abstract: An E shaped stationary magnet/moveable armature combination for use in an electromagnetic contactor. The magnet has three legs; two outer legs and an inner leg. The armature can be a single, essentially rectangular bar or have three legs corresponding to the legs of the magnet. The moveable armature is caused to contact the magnet by a magnetic field created when electrical current is applied to a current carrying coil. An outer leg of the magnet and/or armature is arranged such that an air gap remains between an outer leg of the magnet and armature. The provision of an air gap in an outer leg reduces noise emitted from the electromagnet.

Abstract: An electromagnetic solenoid valve in which a projecting portion disposed on a coil bobbin is abutted against and engaged with a plate so that rotation of the coil bobbin is stopped. As a result of this simple construction, shortcircuiting between the terminal of the coil and the plate can be prevented.

Abstract: A solenoid has a coil energizable to displace an armature in one direction and a spring urging return of the armature in the other direction to a rest position in which an end of the armature engages a stop. The end of the armature has a conical projection machined thereon which projects from the end thereof. The stop is a resilient grommet having conical bore therein so that the rest position of the armature is defined by the spring urging the armature to the rest position with the conical projection of the armature resting in the conical bore of the stop to thereby provide noise-free and rattle-free positioning of the armature at the rest position.

Abstract: An alternating current contactor has an armature to be actutated by a magnet system. The armature is operatively connected to a return spring-loaded contact base holding movable contact parts of the contact system. The contact base is here provided with a supplementary mass and brought into operative connection with the armature via a coupling spring, the supplementary mass being movable relative to the contact base and an additionally provided intermediate part to which the armature is coupled. The coupling spring, taking support on the contact base on the one hand, can, on the other hand, bear against an angularly bent end of the intermediate part which is pressed against the supplementary mass. The supplementary mass is applied against a stop at the contact base or being spring-loaded through a separate supplementary spring counter to the direction of movement of the contact base against a stop at the contact base.

Abstract: An electromagnetic switchgear having a housing and a movable magnet part guided in the housing along a direction of motion. A contact bridge carrier is coupled to the movable magnet part and has openings. The housing has projections of different heights which extend through the openings in the contact bridge carrier and into sequential engagement with the movable part, to provide for switching-off with substantially reduced bouncing.

Abstract: To reduce noise, impact forces and bouncing, the shaft of a rotary solenoid is provided with a dampening mechanism which generally includes a resilient dampening element and a cooperating collar which are axially disposed about the rotating shaft of the solenoid. Following activation of the rotary solenoid, the resilient element is drawn into contact with the housing, developing friction between the rotating resilient element and the housing of the rotary solenoid which operates to bring rotation of the shaft to a controlled stop.

Abstract: A solenoid bumper mechanism wherein a resilient means absorbs a proportion of the kinetic energy of a shaft moving within the solenoid, and a nonresilient means which causes the shaft to terminate its movement at a fixed point. The mechanism provides shaft movement of repeatable precise distances and also does not interfere with the magnetic field created by the solenoid body.

Abstract: The control magnet is secured with cap screws on a cap of a control mechanism of an injection pump by means of a holder element, which is a two-armed leaf spring having pre-stressing. The leaf spring has a middle section which comes to rest flush on the magnet core and both arms come to rest flush on a support face of the cap. The spring force spring stressing of the two-armed leaf spring pre-stressed in this manner has an effect of keeping the control magnet secured such that it is not jarred loose even in the event of high acceleration peaks of the injection pump.

Abstract: The present invention provides an improvement for noise suppression, in an electromagnet constructed of the parts including a yoke, a fixed iron core fixed relative to the yoke, a movable iron core capable of being attracted toward and coming apart from the fixed iron core and a coiled wire wound around the magnetic path formed of the yoke, fixed iron core and movable iron core which serves to attract the movable iron core toward the fixed iron core by means of the magnetic flux induced by passing an electric current therethrough, which comprises dividing either one of the fixed iron core and the movable iron core into a body member and an end-surface member, at which the fixed and movable iron cores are contacted with each other, providing an elastic insert member between the body member and the end-surface member of the iron core in such a manner as not to interrupt the path of the magnetic flux and, optionally, providing a spring means which urges a stem supporting the end-surface member in such a manner t

Abstract: A print mechanism has a laterally spaced longitudinally driven actuator or slider mounted between two electromagnets. By selective actuation of the electromagnets the slider is driven forward to strike a print element and produce printed information. A unique dampener assembly is provided to absorb recoil energy and maintain a fixed start position. The dampener assembly includes a return spring and a three layer damper that absorbs the excess recoil energy without experiencing permanent deformation.

Abstract: A circuit interrupter comprises, in a housing, a movable contact assembly having a movable contact carrier and a contact arm supporting the movable contact carrier, and a cross bar secured to the movable contact assembly for allowing the movable contact assembly to rotate thereabout. The circuit interrupter also comprises a bearing assembly secured to the housing for rotatably supporting the cross bar, and the bearing assembly has a stop surface capable of being engaged by the movable contact assembly for determining the OFF position of the movable contact assembly.

Abstract: A device (10;50) comprisingan armature (12;80) movable in a first and a second direction;an obstruction for (20;22;60;74) for providing a motion stop in at least the first direction;an electromagnetic and return spring (18;28;60;140) for moving said armature in the first and second directions; anda damper attached to and movable with said armature for dissipating energy from the collision of the armature with the motion stop.

Abstract: A solenoid is fitted with three dampers, two located on opposite sides of a flange in the solenoid and the third within the cell bore. The dampers allow movement of a plunger that supplies mechanical energy from electrical energy passed through the solenoid. The dampers absorb vibrational energy that would otherwise break apart the solenoid.

Abstract: A solenoid-type magnet drive, including a coil surrounding in parts an axially movable armature, and a housing for mounting the coil, further includes an attenuating device which comprises an attenuating disk positioned abutting centrally one end of the armature, when in a retracted position; two resilient rings hold the disk near its periphery and without play for preventing rebounding.

Abstract: A dynamic lock for a disc drive carriage incorporates a plunger that captures an extension on the carriage. The plunger is guided by a solenoid and frame. The plunger is spring loaded such that it normally is biased into the carriage to restrain the carriage in the home locking position. The solenoid can withdraw the plunger and allow release of the carriage. A counterweight rotates about a pivot provided on the frame adjacent the plunger. A finger that protrudes from the counterweight rides in a recess on the plunger. In the event of a sudden shock to the disc drive, the shock force is transmitted from the plunger through the finger to the counterweight. The counterweight is designed to be of equal mass to the plunger, whereby the shock force is neutralized, preventing the plunger from moving back toward the solenoid and releasing the carriage.

Abstract: An electromagnetic operator for a contactor (2) having a housing (4,34) including an insulating upper part (4) and a snap-in lower part (34), a magnetic armature (24) movable in the upper part (4), and a magnetic core (30), molded coil (28), return spring (36) and shock pad (32) in the lower part (34). The molded coil (28) is clamped immovably by the lower part (34) against the upper part (4) of the housing. The shock pad (32) has a flat base (32a) with a thin spherical segment (32b) between the magnet core (30) and the lower part (34) and four tabs (32c-f) at its corners supporting the four legs (28c-d) of the molded coil (28) to press the latter securely against the upper part (4) of the housing, these legs (28c-d) having reduced sections (28e-f) that sink into those tabs (32c-f). The shock pad (32) also has two pairs of resilient strips (32g,h,j,k) that extend from the opposite edges of the base (32a) up and toward one another between the yoke portions (32c,d) of the magnetic core (30) and the coil (28).

Abstract: A solenoid contactor arrangement facilitates soft contact between the movable and stationary contacts and provides for overtravel of an armature in a manner which ensures that good and consistent electrical contact is maintained between the movable and the stationary contacts. The movable contacts are carried on an axially reciprocable armature assembly and are afforded limited axial displacement relative thereto. The movable contacts are biased by a coil spring to a first position on the armature assembly in preparation for engagement with the stationary contacts. When that engagement occurs, the movable contacts stop, the spring yields, and further displacement of the armature assembly occurs until a stop on it firmly contacts and is stopped by a corresponding stop on the movable contacts. The spring is formed and positioned such that it does not dimensionally interfere with the firm contact between the movable contacts and the armature assembly.

Abstract: A wire dot printer has a wire dot head comprising a plurality of electromagnets for attracting each armature to thereby project each wire to a printing position, a first cover provided with a guide for guiding the wires to the printing position, holding means for holding the electromagnets, the holding means being formed of a material of high heat radiation efficiency, and a second cover connected to the holding means with high heat conducting efficiency and covering the electromagnets and the armatures, the second cover being provided with radiation fins at a plurality of locations thereon.

Abstract: The electromagnet comprises a fixed magnetic circuit, a mobile magnetic circuit forming, with the fixed magnetic circuit, at least one air gap and a coil. The distance over which the mobile magnetic circuit travels with respect to the fixed magnetic circuit is limited by at least one working position stop determining the working position, this stop being provided with at least one working position damper.

Abstract: An a.c. contactor with an armature activated by a magnetic system, which is effectively connected to a return spring-loaded contactor onto which the movable contact component of the contact system is mounted. The contact carrier is herein fitted with an auxiliary mass and placed in effective contact with the armature by a coupling spring, wherein the auxiliary mass is movable in relationship to the contact carrier and an additional spacer bar component, with which the armature is coupled. The coupling spring supported on one end by the contact carrier, can on the other end connect to an offset end of the spacer component which is pressed against the auxiliary mass, whereby the auxiliary mass connects with a catch of a contact carrier or else is spring-loaded against the direction of motion of the contact carrier towards a stop on the contact carrier via a separate auxiliary spring. These improvements dampen and delay the recoil of the contact carrier experienced during switching of the a.c. contactor.

Abstract: An electromagnet for use in a contactor, for example, is provided with non-magnetic thin plates fixed to either or both of the fixed and moving-iron core contacting surfaces. The plates provide good abrasion and shock resistance and prevent attraction between the fixed and moving cores due to magnetic remanence.

Abstract: A cushion element for a solenoid armature is an elongated unitary member formed of a resilient material having a head portion at one end and a tail portion extending therefrom, the tail portion being formed with a protuberance spaced from the head portion. The solenoid stop member is formed with a bore through which the tail portion of the cushion element is inserted, the length of the bore being substantially equal to the distance between the head portion and the protuberance so that the cushion is locked in place by the combination of the head portion and the protuberance.

Abstract: A low cost electromagnet assembly for a relay. The assembly includes an I-shaped stationary magnet that extends through a passage in a magnet coil and a U-shaped armature assembly with the armature assembly. The armature assembly includes a molded armature guide having projections on a rear wall of the guide arranged to actuate a plurality of switch plungers, side walls extending from the rear wall defining a cavity and an opening in the rear wall exposing a portion of the cavity at the rear wall side of the guide. The assembly also includes the U-shaped armature having a body portion positioned in the cavity and an elastomeric pad position between the armature body portion and the rear wall and a conical spring between the body and guide for absorbing shock created when the electromagnet is deenergized.

Abstract: A magnetic device is arranged so that by supplying current to coils provided on a yoke, an armature is attracted to the yoke, and by interrupting the current supply to the coils, the armature is separated from the yoke. A precious metal coating is provided at least on one of the attracting surfaces of the yoke and the armature. This arrangement allows the armature to smoothly disengage from the yoke, and provides corrosion resistivity.

Abstract: A high frequency coil including an inductance device formed by fitting a pair of electrode caps at both ends of a ferrite magnetic core wound by a winding on a peripheral surface of the core; a heat resistant electric insulating coated layer formed on the peripheral surface of the inductance device and a heat resistant electric insulating resilient tube fitted onto the peripheral surface of the coated inductance device.

Abstract: An improved vacuum pump driven by a unique electrically powered servo motor. The vacuum pump comprises an extremely simple and inexpensive pump arrangement utilizing a reciprocating piston and a rolling lobe diaphragm to eliminate the need for close tolerances while still providing high efficiency. The servo motor includes a pair of relatively movable sequentially operating armatures which eliminate the need for any external timing mechanism or for any complex delay mechanism. The servo motor of the present invention is inherently capable of operating the pump as a self-actuating demand pump.

Abstract: A device for slowing down the movement of the armature within a solenoid comprising a resilient container having a predetermined internal volume, and a dilatant material filling the container which material has as one of its properties at ambient temperatures, a non-resilient deformation when subjected to slow steady state stress, and a highly resilient resistance to deformation when subjected to rapid shock-like stress, whereby the container is connected to the solenoid in a manner affording its compression as the armature moves within the solenoid.

Abstract: A high speed axial-type printing solenoid includes a rebound and energy absorbing arrangement which employs a block of energy-absorbing "dead" elastomeric material held in a partially compressed state by an impact plate. The impact plate is mounted to engage and position the plunger or armature at a rest position and to transmit impact forces to the partially compressed block of elastomeric material.

Abstract: The lifting movement of an armature of an electromagnet is braked by means of a gas which flows out under pressure between the abutment faces of a core of the electromagnet and the armature so that the gas is compressed therebetween and discharged in the outer atmosphere.

Abstract: In a pressure control device for applying modulated pressure to a servo chamber of a vacuum servomotor in response to an output signal from an electric control circuit, the control device includes a modulator valve for modulating pressure in the servo chamber, a solenoid winding to be energized by the output signal from the electric control circuit, a pole of magnetic material disposed within the winding, a spring loaded armature of magnetic material positioned to face the pole and operatively connected to the modulator valve, and a shock absorber mounted on the pole to receive the armature thereon upon energization of the winding.

Abstract: An electromagnetic device adapted to operate with a battery of small capacity and having an armature arranged to move upon energization and de-energization of a coil, to and away from a yoke respectively. In order to insure that, after having been attracted, the armature is in intimate contact with the yoke over the entire prescribed area of interface therebetween, there is provided an annular elastic spacer which may be of round cross-section secured in an annular recess around a pivot pin for the armature at the center of length thereof and fitted in a vertical hole of the armature to permit not only absorption of the shock on the armature, thus protecting the attraction face, but also tilting movement of the armature about the spacer ring with respect to the yoke.

Abstract: An electromagnet having a stationary core and a movable armature, each having three pole faces, forms a magnetic circuit having three substantially parallel legs when the core and the armature are brought together. The center leg of the magnetic circuit includes a demagnetizing airgap combined with a non-magnetic coating on a center pole face, which coating is more resistant to wear than the material of the uncoated pole faces.

Abstract: A solenoid for selectively actuating a valve. The solenoid has a housing removably connected in a fluid-tight manner to a housing of the valve. An actuating coil is housed within the solenoid housing with an actuating plunger coaxial therewith internally thereof. The plunger is actuated reciprocably to a projected position for opening the valve when the actuating coil is energized and restores to a restored position when the coil is deenergized. The plunger terminates in a push pin of lesser diameter and defines a shoulder therewith and an opposite end terminates in an axial shaft or axle shaft of lesser diameter which defines a second shoulder therewith. Flexible dampeners are mounted on both shoulders for dampening the plunger movement as it reaches two extreme positions corresponding to the projected and restored positions thereof. The dampeners engage portions of the solenoid housing to dampen the plunger arrival at its terminal or extreme positions.

Abstract: The present invention is directed to an improved electromagnetic relay having means for eliminating the chatter or bounce of the relay armature upon the movement of the relay armature from its energized position to its rest position, that is, the releasing or returning movement of the relay armature. An armature stopping means is formed by two resilient strips which deflect in response to the returning movement of the relay armature. This deflection of these resilient strips stores energy in these resilient strips for returning the relay armature to its initial rest position. In addition to these two resilient strips, the armature stopping means of the present invention includes means for generating independent counter forces which oppose the deflection of these resilient strips. One of these counter forces is a frictional force generated by the abuttment of a bent flange forming part of each of the resilient strips against rigid mounting elements for mounting the two resilient strips.

Abstract: In the housing of an electromagnetic switching apparatus including a magnet coil and switching and non-switching magnet parts disposed within the housing, and at least one damping compression spring for biasing the non-switching magnet part in one direction in the housing, the spring having a plurality of turns of the same diameter and one end turn having a diameter greater than that of the plurality of turns for securing the spring in the housing, the improvement comprising hook-shaped projection members disposed within the housing about the periphery of the compression spring. The projection members are spaced apart from each other along a diameter of the spring by a distance which is greater than the diameter of the plurality of turns thereof but less than the diameter of the end turn. The plurality of turns of the spring are axially movable between the projection members while the end turn of the spring is engaged by the members.

Abstract: In an electrical relay in which the moving contacts of a switch are actuated by the pivoting movement of an armature, the moving contacts are carried by a blade which is supported on the armature by a contact carrier in the form of an insulating block. The carrier is anchored to the armature by a pair of clamping members having cantilevered spring fingers that engage recesses in the margins of the carrier to clamp the carrier against the armature and secure the carrier against lateral movement.

Abstract: An arrangement for coupling the armature and contact-bridge carrier for an electromagnetic switching device, such as a relay which comprises an elastic interlay interposed between the contact-bridge carrier and the armature of the relay. The interlay is shaped substantially like the frustum of a cone. The first surface or base of the cone contacts the contact-bridge carrier, while the second surface or cut-off side of the cone frustum, contacts the armature. This arrangement, minimizes the lateral shock-loading of the contact-bridge carrier when the relay is switched off so that resulting mechanical moments are kept relatively small. Further, the arrangement provides an increased level of damping.

Abstract: An apparatus for the elastic, resilient mounting of the non-switching magnet part of an electromagnetic switching device in the direction of the magnetic force thereof, comprising a ring-shaped leaf spring which is closed in itself. More particularly, the leaf spring is arranged so as to rest against the non-switching magnet part at at least two contact areas and to rest against parts fixed relative to the housing at two further contact areas, the latter contact areas being situated on the side of the leaf spring opposite from the side resting upon the former two contact areas.

Abstract: A high speed axial-type printing solenoid includes a rebound and energy absorbing arrangement which employs a block of energy-absorbing "dead" elastomeric material held in a partially compressed state by an impact plate. The impact plate is mounted to engage and position the plunger or armature at a rest position and to transmit impact forces to the partially compressed block of elastomeric material.