Abstract: In one aspect, an apparatus for use in a wellbore is disclosed that in one non-limiting embodiment includes a string for placement in the wellbore and a switch on an outside of the string, wherein the switch includes a plurality of magnetic elements that provide a continuous electrical when the plurality of magnetic elements are aligned by an externally applied magnetic field. In one embodiment, the switch includes a channel that houses the plurality of magnetic elements that remain unaligned until the magnetic elements are aligned by the externally applied magnetic field.

Abstract: A solenoid assembly is provided in which electrical energy is supplied to a coil through a post that extends through an armature. The solenoid assembly includes a coil assembly having a coil, with a pole piece and an armature at least partially surrounding the coil. The armature is configured to translate relative to the pole piece when the coil is energized. The coil assembly has a bobbin at least partially surrounding the coil and a first post that extends from the bobbin. Electrical current is supplied to the coil through the first post. The armature is configured so that the first post extends through the armature. A feature is configured to prevent the armature from contacting the first post when the armature translates.

Abstract: The invention relates to a valve having a closure element which is movable in an inner chamber and closes or clears a valve seat. The closure element is activated by a magnetic assembly in the magnetizable wall surrounding the inner chamber. According to the invention, the closure element has a low density. It comprises a hollow body having at least one activator body made of magnetizable material that is freely movable therein. The closure element has a low weight and a large surface. The large surface facilitates the resetting of the closure element on the valve seat by the action of the flowing medium.

Abstract: The invention relates to a hydraulic transmission valve with a magnetizable housing which is integrally configured in one piece with a pole core cone. The transmission valve according to the invention facilitates comfortably coupling in particular startup clutches, shifting clutches or synchronization clutches in a friction locking manner. Still using a transmission valve of this type is facilitated for fewer to no transmission oil changes. Furthermore a transmission valve of this type can also be used in countries with inferior transmission oil quality. The housing includes a connection. The connection defines an anchor stroke and a concentric arrangement between the pole core cone and a pole tube. Thus, the pole tube is fixated the magnetizable pole flange. An anchor that is exclusively supported in the pole tube is magnetically separated from the pole tube through a separation layer with a thickness of 0.01 mm to 0.06 mm.

Abstract: Disclosed is a rotating actuator with a variable latching profile, the rotating actuator having a housing, a rotary knob and a rotary shaft connected in a rotationally fixed manner to the rotary knob, and also at least two latching contours connected in a rotationally fixed manner to the rotary shaft, one support per latching contour, on which support at least one latching element is arranged, the latching element engaging in the latching contour assigned to the support, and which support is mounted rotatably about the rotary shaft, and at least one locking device per support, by means of which the support can be locked relative to the housing.

Abstract: In actuating devices such as, e.g., multifunctional actuators, it is necessary in many cases to block at least one specific direction of movement. A simple and reliably operating device is proposed for this purpose, which uses an electromagnet to bring a ball from a rest position into a blocking position. In the blocking position, the ball mechanically blocks the relative movement between two parts.

Abstract: The present invention provides the actuator, which is capable of preventing biased abrasion by lowering a surface pressure at a contact portion of a movable element with a guide surface and increasing a movable range, in which a specified output force can be gained. Magnetic resistance of at least one of the surfaces (Y1, Y2) of first and second yoke parts (5, 6) corresponding to peripheral surfaces (P1, P2) of a plunger (7), on which magnetic flux acting surfaces are formed by energization, is unbalanced in the circumferential direction so as to act a resultant force of magnetic forces acting on the movable element in the radial direction eccentrically to a radial one end (E1) side.

Abstract: A valve including a shutter placed in a chamber which is arranged in the valve body and whose end is provided with a seat against which a plug-forming part of the shutter is pressed in the closed position of the valve and is remote in the open position thereof. The inventive valve also includes a magnetic control device provided with the shutter magnetic drive device disposed outside the chamber and displacing the shutter in the closed or open position thereof. The valve is characterized in that the magnetic control device includes at least one ball which is made of a magnetic material, disposed in the chamber and is coupled with an external magnetic drive device, wherein the ball is associated with the shutter in such a way that the shutter is driven in the chamber when the ball is moved by a magnetic drive device.

Abstract: A highly efficient electromagnetic actuator which can reduce leakage of the magnetic flux is provided. The electromagnetic actuator comprises a first coil 31, a movable body 2 adapted to move on the central axis of the first coil 31, a first stator 11 covering the top face, bottom face and outer peripheral face of the first coil 31, and a permanent magnet 15 adapted to firmly latch the movable body 2 at one end point of its movable range. A second stator 12 adapted to control the magnetic flux generated from the permanent magnet 15 is provided in succession with the first stator 11. By providing the second stator 12, when releasing the movable body 2 from its firmly latched state, the permanent magnet 15 is not inversely excited or demagnetized.

Abstract: A valve includes a valve body, a flux tube, and a winding. The body defines first and second passageways, and a circular opening is defined in the second passageway providing fluid communication between the passageways. The flux tube has a closed end, an open end, and a hollow armature receiving section. The open end is in fluid communication with the first passageway. A spherical armature is disposed in the armature receiving section for reciprocating movement between a closed position sealing against the circular opening to prevent communication between the passageways and an open position spaced apart from the opening permitting communication between the passageways. The winding is disposed about the flux tube for electromagnetically positioning the armature. The flux tube forms a fluid tight pressure boundary between the winding and the passageways. A spring urges the armature toward one of the open position and the closed position.

Abstract: A splash proof electromagnetic door holder is sealed to prevent failures caused by exposure to moisture. The electromagnetic door holder comprises a ground box, a main housing attached to the ground box, and a coil assembly attached to the main housing. The coil assembly includes a bobbin containing a wire coil. A sealant, preferably epoxy, covers the face of the bobbin to prevent moisture from entering the coil assembly. A seal is incorporated between a coil passage in the main housing and the coil assembly. Seals are included between the main housing and the ground box. The resulting the electromagnetic door holder resists the entry of moisture into the electromagnetic door holder and thereby improves the reliability of the electromagnetic door holder.

Abstract: A ball actuator 10 comprises a case 12 supporting a striker 14 with an energy storage spring 16, a control rod 18 movable in translation in a direction parallel to a geometric axis 19, detent balls 20 and control balls 22. When the rod is moved in translation by an electromagnetic relay 100, the control balls 22 escape and enable the detent balls 20 to be freed so that the striker 14 is released. Each control ball 22 is in contact with two detent balls 20 and with the rod 18 so that the forces applied to the rod 18 by the control balls 20 are much lower than the forces exerted by the striker 14 on the detent balls 22. A high-efficiency actuator is thus achieved requiring a low operating energy and with small overall dimensions.

Abstract: A solenoid includes a ferrofluid in gaps between the moving and stationary elements which ferrofluid reduces noise caused by activating a plunger positioned within the solenoid. A permanent magnet can be included as a solenoid element to increase magnetic field strength within the solenoid to retain the ferrofluid within the solenoid.

Abstract: A solenoid includes a ferrofluid in gaps between the moving and stationary elements which ferrofluid reduces noise caused by activating a plunger positioned within the solenoid. A permanent magnet can be included as a solenoid element to increase magnetic field strength within the solenoid to retain the ferrofluid within the solenoid. A cushion located between the plunger and a butt toward which it moves also reduces the noise, while the ferrofluid maintains a relatively high solenoid force relative to a solenoid with air gaps.

Abstract: A magnetic switch assembly (10) for electrically coupling with an electrical circuit of an alarm system detecting relative movement between first and second adjacent members and for defeating attempted magnetic manipulation of the switch assembly (10) is disclosed. The switch assembly (10) includes a ball switch (20) for sensing the presence of an intruder's magnet (28) in the vicinity of the switch assembly (10) and for changing the state of the electrical circuit in response thereto. The switch assembly (10) also includes a reed switch (22) electrically coupled with the ball switch (20) for detecting relative movement between the first and second adjacent members and for changing the state of the electrical circuit in response thereto independently of the ball switch (20).

Abstract: An actuator (24) for a valve (10) includes a housing tube (26) enclosing an internal cavity (48). A plunger (42) is mounted for movement in the internal cavity. The plunger includes four slots (50). Rollable spheres (58) are positioned in the slots between staked areas (62). A magnetic field created by electrical current passing through a coil (34) moves the plunger downward to open fluid flow through a control element (20). Flow through the control element enables controlled flow from an inlet (14) to an outlet (16) of the valve. The actuator construction provides for substantial elimination of sliding friction acting on the plunger, reduces hysteresis and the amount of power required to move the plunger, and facilitates accurate control of fluid flow rate through the control element.

Abstract: A solenoid valve which includes a valve body having a central bore from which fluid passages radially extend. A valve spool is axially slidably captured within the valve body bore to control passage of fluid among the valve body passages. An electromagnetic variable force motor is mounted on the valve body and includes a housing of ferromagnetic construction with a pole piece of ferromagnetic construction coaxial with the valve spool and surrounded by an electrical coil. An armature comprising a ball of ferromagnetic construction is positioned coaxially with the pole piece in abutting engagement with the valve spool. A coil spring is positioned to engage the ball-armature and to urge the same axially away from the pole piece. The characteristic of magnetic attraction between the ball-armature and the opposing face of the pole piece as a function of separation therebetween is substantially identical with spring rate, both preferably being a linear function of ball-armature displacement.

Abstract: In known injection valves having a spherical valve closing member, it is difficult to center the valves. In the novel injection valve, self-centering is precisely achieved. In a valve having a spherical valve closing member on which a restoring spring is supported and which is located facing the end of the core of an electromagnet, it is proposed that a centering ring of soft magnetic material be disposed between the spherical valve closing member and the core end face. The injection valve is particularly well suited for fuel injection systems in internal combustion engines.

Abstract: A composite elastomer-tipped tubular metallic device for armature and check valve applications has a hollow tubular metal body and a generally spherical elastomer ball fitted into an end of the body so as to project outwardly beyond the body end. Also, the body of the device has a seat structure provided internally at the end thereof which is adapted to capture and retain the ball in the body end. In several embodiments of the device, the seat structure is defined by a pair of axially spaced annular ribs formed internally in the body at the end thereof, with the ribs projecting radially inwardly toward a central axis of the tubular body. In one embodiment, one of the ribs may be formed as a split ring received in an annular groove in an interior surface of the hollow body.

Abstract: A miniaturized switch particularly suitable for electronic keyboard control applications has a pair of contact members providing spaced contacts, a conductive floating contactor disposed in the space between such contacts adapted to engage both of the contacts to close the switch, a resilient sleeve enclosing the contacts and the space therebetween to encircle the contactor, and actuator means to displace the contactor within the sleeve relative to the contacts to effect closing of the switch.

Abstract: An electrical transducer for indicating the position of an element movable n a predictable path, such as angular rotation, has no electrical parts on the movable element. A magnet mounted to the movable element traces a fixed path which lies adjacent to a stationary tubular enclosure containing liquid suspending a mass of ferromagnetic, electrically conductive material, the magnet drawing the mass of particles along within the tube on movement in its fixed path. Electrodes spaced on opposite sides of the tube wall along the length of the tube are electrically coupled by the mass of particles, whereby to indicate the position of the movable element.

Abstract: An electrical relay construction in which the function of the actuating magnetic field of operating the relay is separated completely from the function of providing contact closure force. A pair of electrically conductive, spherical bodies (18, 19) are rollably clamped by spring means (28) between a common, electrically conductive plate (20) and individual platforms (14, 15, 16) connected to the relay terminals (11, 12, 13). The common plate (20) is mounted on an actuating member (21) controlled by a solenoid (31) to roll the bodies (18, 19) between the common plate (20) and the terminal platforms (14, 15, 16) to complete the possible relay conducting paths.

Abstract: The invention relates to a magnetically controlled switch with contacts wetted by a conductive liquid. It is characterized in that the wettable contact surfaces of the electrodes are selectively connected to one another by a wettable ferromagnetic moving element covered with mercury which is held solely by the surface tension forces of the mercury. The absence of any polarizing force and the lightness of the moving element enable the switch to operate with a minimal energy consumption and stabilize it against accelerations. Principal application to any low-power circuit and in particular to telephone circuits.

Abstract: A switch is disclosed comprising two sets of rod-shaped fixed electrodes formed of a magnetic material and one cylindrical moving electrode formed of a permanent magnet, each set of the fixed electrodes being fixed to the respective end of a cylindrical vessel so that the ends of each set of the fixed electrodes face the ends of the other set of the fixed electrodes with the moving electrode capable of reciprocating between the ends of the two sets of fixed electrodes inside the cylindrical vessel. The moving electrode is comprised of at least one adhesive layer of a metal selected from the group consisting of silver, nickel, copper and alloys thereof on the surface of the permanent magnet, and at least one contact layer of a metal selected from the group consisting of rhodium, wolfram, rhenium, ruthenium and alloys thereof, silver-wolfram, gold-chromium on the adhesive layer of metal. At least the permanent magnet of the moving electrode and the adhesive layer of metal are thermally diffused with each other.

Abstract: An electrical magnetic switch adaptable for use in a digital wristwatch in which a command function for a digital wristwatch is controlled by a switch or an actuator. The magnetic switch is normally open and is closed by the movement of the wrist of the wearer to overcome the magnetic force from a permanent magnet on a magnetizable movable armature. The displacement of the magnetizable movable armature against the urgency of the magnetic force closes a circuit for performing a command function for the digital wristwatch. For regulating the magnitude of force on which the magnetizable movable armature is displaced against the urgency of the magnetic force of the permanent magnet, means are provided for adjustably positioning the permanent magnet relative to the path of travel of the magnetizabe movable armature. Alternatively, the movable armature may be a permanent magnet and the adjustably positioned means may be made of magnetizable material.

Abstract: A connection module has a plurality of connection devices, each including two conductors separated by an insulator having an aperture between the conductors and containing a plurality of magnetic balls. The balls and the conductors are coated with a material having a melting point above 85.degree. F. A magnetic force is used to align and hold the balls between two conductors while sufficient heat is applied to melt the material on the balls and the conductors. Upon cooling, the material on the balls and the conductors solidifies fusing the balls and the conductors together into a permanent connection.