Abstract: A pole piece is secured to a magnet by means of a connecting element running perpendicular to the common plane of the confronting surfaces of the magnet and the pole piece. The connecting element is welded to the pole piece and/or the magnet by electron bombardment or by means of a laser so as to cause minimum disturbance to the structure of the magnetic materials.

Abstract: A polarized reversible direction solenoid having a rectangular sheet of flexible permanently magnetized material wrapped around the armature. This magnetized flexible sheet permits the construction of very small reversible solenoids at a reasonable cost.

Abstract: A method of making an adjusting pin fit into a cylindrical bore in a ferro-magnetic core having a sharp edge includes the step of axially inserting the pin into the bore from the side having the sharp edge whereby the sharp edge cuts off a part of the pin projecting outside of the circumference of the cylindrical bore.

Abstract: A method of forming the core tube of an electro-magnetic solenoid comprises forming and positioning the end portions of the core tube and centrifugally casting the non-magnetic intermediate portion of the core tube.

Abstract: A method for making a stator for electric motors comprised of a plurality of laminations arranged with their sides in the direction of the rotor axis wherein the edge portions of the laminations running in the axial direction are bent upwardly towards the stator bore and maintained in spaced apart relation at a predetermined position and permanently fixed in that position solely by means of a moulding compound. Each lamination stack consists of undivided laminations comprising a north and a south pole wherein each main pole consists of the lamination edges of the two adjacent stacks.

Abstract: An immersed electromagnetic torque motor having a movable flapper is protected against the accumulation of contamination in magnetic gaps of the motor and the resulting jamming of the motor by coating the motor with a lacquer or other fluid-impermeable material and mounting the motor in a blind fluid chamber from which the flapper projects. An aperture is provided in the coating at a low flux area on the exterior of the motor to admit the immersing fluid for purposes of mechanical damping and, at the same time, to restrict the migration of fluid and contaminants toward magnetic gaps within the torque motor.