Abstract: The invention is directed to an electromagnetic holding device which includes one or more permanent magnets and an electromagnet. The holding device releases and pulls in units which are held thereon. During an exchange operation, the field of the electromagnet is superposable on the field of the permanent magnet either in the same direction or in the opposing direction and thereby intensifies or neutralizes the holding force. In order to provide the smallest possible assembly volume and lowest weight with the highest possible holding force, the permanent magnet is disposed ahead of the electromagnet when viewed with respect to the exchange face. When the exchange part is pulled in, the field lines of the electromagnet run in a completely closed flux-conducting part which is not interrupted at any location by an air gap.

Abstract: A system for setting in particular the rotor (2) of a coaxial or waveguide switch in n possible locking positions S.sub.1, S.sub.2, S.sub.3, . . . has an axially staggered drive on one side and on the opposite side a locking means (6, 7, 8/9, 10/11, 12). On the side facing the stator, the drive (3, 4, 5) has a drive winding composed of the drive coils (5) connected to only one pair of conductors by means of which a current of a determined polarity is supplied to the drive winding (5) and which turns the rotor (2) in the direction of the n locking positions S.sub.1, S.sub.2, S.sub.3, . . . by means of magnetic forces. The main purpose of the locking means (6, 7, 8/9, 10/11, 12) is to turn the rotor (2) into the exact locking position and to maintain it in that position.

Abstract: An electromagnet having a magnetic shield, in which dummy holes generally equal in shape to a hole conventionally provided for a service port are formed in a pair of end plates of a magnetic shield. The holes formed in each of the end plates are in equal radial-direction positions and are arranged in the circumferential direction at equal angular intervals, and the positions of the holes formed on the two end plates are symmetric on the center point of the electromagnet and/or the plane containing the center point and perpendicular to the center axis. Portions of the end plates in the vicinity of the holes are increased in thickness to compensate for the loss of the magnetic material due to the formation of the holes.

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: A magnetic gripper avoiding the disadvantages of the well-known devices of reduced lifting capacity, increased electric power consumption and small gripping force finds application in mechanical engineering for the transportation of ferromagnetic materials. The device has a U-shaped casing of magnetic soft material, at least two pairs of permanent magnets, one of their ends resting on the casing and the other on a common pole terminal enveloped in a neutralizing winding and all magnets are enveloped by a magnetizing winding. The magnetic gripper can lift thick sheets and packs of thin sheets when short-time current pulse of the magnetizing winding is fed and the permanent magnets are magnetized in one direction, the magnetic flux formed is collected in the common pole terminal. To free the sheets, a current pulse of the common neutralizing winding is fed and the direction of magnetization is reversed.

Abstract: An arrangement of electrically anisotropic high-temperature superconductors (A1, A2) on a non-superconducting metal strip (1) for alternating-current applications, such as magnets and electrical machines, is specified in the case of which a relatively simple reduction of alternating-current losses is achieved in that at least one strip (A1, A2), deposited as a layer, made of a high-temperature superconductor, spirally surrounds this metal strip. The superconducting strip (A1, A2) has a preferred direction in which the critical current density is smaller than in all other directions. In this arrangement, a current (i) flowing through the superconductor flows periodically through regions of the superconductor (A1, A2) that are oriented in the preferred direction and twisted by 180.degree. thereto. These periodic regions limit the length of the eddy currents.

Abstract: The relay of the present invention is economically adapted for nuclear and commercial applications. The reliability of the relay is enhanced by utilizing a split coil and a permanent magnet located therebetween. The so-called split coil/permanent magnet configuration supplements the upward forces generated by a kickout spring by positioning a permanent magnet so as to assist in holding the armature and contacts rigidly in the off position. The design of the present invention assures that the armature stays in the desired position even when the relay is subjected to shock and vibration forces present in the environment.

Abstract: A refrigerated superconductive magnet is provided with six magnet cartridge radial struts supporting the magnet cartridge in the vertical and lateral directions. The struts are positioned such that two lateral struts on each end of the magnet cartridge react against the contact force of the cryocooler cold head and support half of the vertical (gravitational) load of the magnet cartridge. Two vertical struts support the other half of the vertical load. The vertical struts pivot to allow the cartridge axial centerline to shrink towards the cryocooler interface during cool down. The strut attachment points have been located near the horizontal midplane in order to minimize the sag of the magnet cartridge due to its own weight.

Abstract: A solenoid actuator comprising a coil or coils of electrical wire and a plugnut and movable core within the coil(s). A magnetic yoke surrounds the coil(s), the axis of the latter extending across the magnetic circuit defined by the yoke. Relatively large and small permanent magnets are associated with the yoke on opposite sides of the axis, the magnets producing flux in opposite directions. A flux sensor, closer to the small magnet, senses changes in direction of the flux. When the core and plugnut are separated, the large magnet flux predominates throughout the yoke. When the core engages the plugnut, the small magnet flux predominates in its portion of the yoke, this change in flux direction being detected by the sensor. Thus, the sensor can be used to indicate the position of the core with respect to the plugnut.

Abstract: Two pair of thermal shield axial supports are provided. Each support includes a strand of wire brazed on either end into threaded studs. One stud is threaded into a topped hole in the end of the magnet cartridge. The stud on the other end extends through a clearance hole on the end flange of the thermal shield. Belleville spring washers are compressed against the shield by a nut. Prior to cool down, the Belleville washers are compressed. As the shield and magnet cool down, the shield contracts axially with respect to the magnet cartridge, thus relaxing the washer stack compression. The wire tension relaxes from the maximum pretension to a nominal tension at operating temperature.

Abstract: A magnet roll for an electrophotographic device includes a magnet carrier assembly constituted by a plurality of identical cylindrical segments of injection molded plastic material. The segments are coaxially arranged and longitudinally aligned in an end-to-end relationahip on a spindlelike metal rod constituting the magnet roll axis of rotation. The segmented carrier assembly provides a plurality of longitudinally extending channels circumferentially spaced about the carrier assembly. The bottom of each channel has along its length a central groove that functions as a locator for an extruded, flexible magnet strip that mounts within the channel, each magnet strip having along the length of its underside a centered tongue that fits into the locator groove of its respective channel. Such a magnet roll provides for highly accurate positioning of the outer working surfaces of the magnet strips.

Abstract: A solenoid apparatus includes a plurality of plate members of which at least some are electromagnets, each of the latter including at least one toroidal coil of conductive wire. Guiding device is connected to the plate members so as to keep them in alignment, and so as to allow the plate members to separate from each other and approach each other while preventing the separation between any adjacent pair of electromagnets from exceeding a given maximum. The device includes means allowing electrical energization of the coils of conductive wire.

Abstract: A substantially spherical magnet comprising two facing hemispherical, magnetized and hollow structures is proposed to produce a uniform induction field going from one structure to the other. By spacing sufficiently apart both structures, an equatorial opening is created to provide for the introduction of bodies to be subjected to said induction. It was shown that homogeneity may be reached at a given order if each structure is comprised of rings, shaped like a portion of a spherical crown, obtained by juxtaposition of magnetic blocks, and if the number of blocks in each ring is higher than or equal to four times the number of rings in each structure.

Abstract: A clamp comprising a semicircular journal part and an inside diameter changing part disposed to face each other inside a ring-typed band and a fastening bolt that passes through the band perimeter and contacts to the inside diameter changing part by a pad placed at its end.The fastening force by the fastening bolt in this clamp acts across the neck axis so that it causes no slip movement of the deflection yoke when clamped.

Abstract: The invention is directed to a magazine for an apparatus such as a coordinate measuring apparatus. Measuring probes are held in their magazine locations by magnetic forces. Each magazine location is provided with one or more permanent magnets. The holding force of the permanent magnets is neutralized by an individual electromagnet on that magazine location which is involved in an exchange operation. In this way, the measuring probe being held can be easily removed. The magazine can also be for an apparatus such as a machine tool in which case work tools are held at the magazine locations.

Abstract: A permanent magnet structure comprises a flux source having a central cav wherein a highly uniform magnetic field is produced of radial orientation. The flux source comprises a pair of radially magnetized discs of MR material. The discs are coaxially aligned parallel to and separated from each other a given distance. A ring fabricated of passive ferromagnetic material circumscribes the peripheries of the discs, and cladding magnets cover the planar exterior surface of each disc.

Abstract: A coil-carrier half (11) for a saddle-coil arrangement for a cathode ray tube accomodates a saddle-coil winding, in a front groove (13), a rear groove (14), left slots (18.11-18.51) and right slots. Prolongation of the left slots in comparison with the right slots results from the presence. in a rear wall (15.h) of a front-groove, at the positions where the left slots open out into the groove, of steps which are greater towards the front than at the fan-out positions of the right slots.In an asymmetrically built coil-carrier half of this sort, turns (12)' are introduced in each slot so that they run towards the prolongation position of the slot. This produces a saddle-coil arrangement which leads to fewer image defects than when a conventional saddle-coil arrangement with symmetrical coil-carrier halves is used.

Abstract: A saddle type dipole coil comprises a pair of elongated ring shaped upper and lower coil layers each having an assembly of coil conductors of series-connected turns. The upper and lower coil layers are opposed each other and disposed on the outer surface of a duct. The end portions of the upper and lower coil layers positioned in a range of a predetermined width are so extended by a predetermined length in the longitudinal direction that the integral value of only sextupole components of a magnetic field is minimized or set nearly zero among the entire multi-pole components of the magnetic field, thereby enabling to make a synchrotron radiation ray generating device with good efficiency of accelerating particles.

Abstract: The apparatus is used to make a magnet with a plurality of magnetic pole pairs. One or more pole pairs is formed by the apparatus as an initial step. Thereafter, additional pole pairs are formed by moving the apparatus with respect to the body to be magnetized or moving the body to be magnetized with respect to the apparatus. The apparatus is constructed so that previously magnetized portions of the magnetizable body are not demagnetized or significantly altered by the magnetization of adjacent parts of the magnetizable body.

Abstract: An electromagnetic switch for use, for example, in combination with a starter motor for a vehicle, having an appropriate wiping allowance adjusted in assembling the electromagnetic switch. The electromagnetic switch comprises a case, a coil bobbin mounted with a solenoid, a plunger with an integral contact rod axially slidably received in the bore of the coil bobbin, a stationary core fixedly held on the open end of the case so as to limit the range of movement of the plunger, a contact holding member axially slidably mounted on the contact rod of the plunger, a moving contact held on the contact holding member, a stopping means provided at the extremity of the contact rod, a cap joined to the case, and a stationary contact attached to the cap opposite to the moving contact.