Abstract: A switchable permanent magnet eddy current or track brake which has a high density of permanent magnet material, a low internal flux leakage and a higher than heretofore output flux density. The pole shoes of the movable magnets are convex cylindrical segment-shaped and mate with concave cylindrical segment-shaped recesses in the lateral flux return pieces for the fixed magnets.

Abstract: A brake magnet for watt-hour meters using permanent magnet material of low permeability of nearly one and high coercive strength in which exact temperature compensation for a required temperature range can be achieved and which is easily manufactured. The temperature compensation elements are positioned on the surfaces of the brake magnet system away from the air gap.

Abstract: A shiftable or turnable permanent magnetic eddy current and/or friction track brake which automatically reduces the friction braking forces to usable limits as the vehicle slows down. The brake is movably supported on the vehicle in the line of movement and is biased in the direction of movement by resilient means. When the brake frictionally engages the track, it moves against the biasing means which shifts the magnets to a partly braking off position to reduce the friction forces.

Abstract: A plastic bonded permanent magnet including particles of permanent magnet material having a high affinity for oxygen, such as ultra-fine grain iron, bismuth-manganese and cobalt rare earth magnetic materials, dispersed within a substantially oxygen free plastic.

Abstract: An eddy-current speedometer having a rotatably driven permanent magnetic element and a cooperating eddy-current rotary element provided with an indicating device and mounted to rotate coaxially therewith and be set rotating by alternating magnetic fields generated by the magnetic element at spaced points therearound and penetrating the rotary element in directions radially thereof, has its magnetic element made of a magnetic material of low permeability and provided with at least eight sets of magnetic poles of alternating polarity equally spaced apart in a concentric path around the rotatable magnetic element with the poles of each set being of opposite polarity and spaced apart radially of the rotatable magnetic element to define an air gap therebetween.

Abstract: An eddy current or hysteresis brake, preferably for track bound vehicles which is infinitely variable and wear-free. A cylindrical rotatable permanent magnet magnetized on its diameter is arranged between a pair of pole pieces in combination with the plurality of stationary magnets, each arranged to magnetize the pole pieces with opposite magnetic polarity. By rotating the cylindrical magnet, the magnetic field at the ends of the pole pieces can be varied from a maximum to zero. The generated flux is projected into the track. Braking occurs by induced eddy currents.

Abstract: A permanent magnet energized holding device, which has a maximum holding power for a given volume of magnetic material, can be readily switched on and off with a minimum of force. At least two pairs of plate-shaped poleplates are provided with a permanent magnet arrangement sandwiched in between. Each pair of poleplates are separated by a non-magnetic medium. The permanent magnet arrangement consists of a fixed magnet, having a circular opening, and a disc shaped magnet rotatable in the opening. The two magnets are magnetized in the direction of their smallest dimension with portions of each having opposite magnetic polarity. The portions of the stationary magnet are arranged to magnetize the pole plates with opposite magnetic polarity.

Abstract: A device adapted for special use in a reset timer/counter unit to return various digital counting subwheels to their reset condition after a timing or counting cycle. The device includes a first ring formed from a permanently magnetizable material having a generally circular first pole surface with a set of opposite polarity magnetic poles arranged in a selected pole pattern on the first pole surface and means for securing the first ring onto one of the subwheels or other device to be returned to a selected position. The second ring formed from a permanently magnetizable material is provided with a generally circular second pole surface generally facing the first pole surface and having opposite polarity magnetic poles arranged in a pole pattern matching the selected pattern of the first surface with poles of the first surface generally facing opposite polarity poles of the second surface when the members to be controlled are in a selected angular returned, or known, position.

Abstract: A device adapted for special use in a reset timer/counter unit to return various digital counting subwheels to their reset condition after a timing or counting cycle. The device includes a first ring formed from a permanently magnetizable material having a generally circular first pole surface with a set of opposite polarity magnetic poles arranged in a selected pole pattern on the first pole surface and means for securing the first ring onto one of the subwheels or other device to be returned to a selected position. The second ring formed from a permanently magnetizable material is provided with a generally circular second pole surface generally facing the first pole surface and having opposite polarity magnetic poles arranged in a pole pattern matching the selected pattern of the first surface with poles of the first surface generally facing opposite polarity poles of the second surface when the members to be controlled are in a selected angular returned, or known, position.

Abstract: A rubber-like flexible permanent magnet comprised of a mixture of granular, high coercivity, permanent magnet material and a rubber-like flexible binder material. A substantial e.g. 90 percent amount of the permanent magnetic material have a grain size of from 0.125 to 0.3 mm. More magnetic material may be used with the same flexibility. Light colored powders such as titanium oxide, or aluminum can be added or the grains coated with a metallic layer using vacuum deposition or a chemical bath deposition to make the final magnet light in color.