Abstract: Contact carriers for relays are produced by electrochemically plating sheets of electrically conductive nonmagnetic metal with iron. The sheets have a width corresponding to the intended length of the contact carriers. The sheets are then cut in strips across the width of the sheets to form the contact carriers. The sheets can be plated on one or both sides. Following the plating step and before cutting the strips from the sheet, the sheet can be mechanically treated, as by rolling, to increase the resiliency of the sheet. The sheet can be masked during the plating operation to produce contact carriers with unplated portions on the plated sides of the carriers. A contact element can be mounted on the plated or unplated portion of the contact carrier and more than one contact element can be mounted on each carrier. The contact carriers and contact elements can be arranged in relays in many combinations utilizing the forces of attraction and repulsion.

Abstract: A small reed switch having a glass tubularly shaped envelope containing a ir of reed contacts is modified to ensure its being biased to either an open or a closed position. A donut-shaped piece of a rubber-bonded, barium-ferrite, magnetic material is circumferentially mounted on the reed switch at a position where its magnetic field influences the contacts to an open position or a closed position. Thusly arranged, an actuating magnet, having a sufficient field at a single pre-established distance from the contacts, actuates the switch from all radial directions from the switch. Potting the modified switch in an epoxy resin further ensures a greater reliability and makes it ideal for implantations in laboratory animals.

Abstract: In a fuel injection controlled internal combustion engine, a magnetic trigger device provides the source of electrical timing signals for operating the injectors. A single rotating magnet has its magnetic field extended to an effective angular radiation area substantially greater than the angular radiation area of the magnet alone. A pair of magnetizable members are positioned on either side of the path of a rotating magnet for developing an enlarged magnetic field for actuating a single reed switch. The reed switch connects a source of power to a pair of signal lines wherein one line contains an inverter, whereby, the signal on one line is the complement of the signal on the other line.

Abstract: A magnetically actuated switching device using reversibly magnetizable armatures treated by a selective annealing process. The annealing process changes the homogeneous coercive magnetic properties of the armatures so that the highest coercive force is caused to occur in the region of the armature which is subjected to magnetizing forces from an energizing coil, and the region of the armature existing outside the magnetizing field is annealed in a manner to lower the coercive force of the armature. Selectively annealing the armature to provide high coercive force in the vicinity of the magnetizing coil reduces the amount of magnetizing force necessary to be supplied by the coil for switching the armature from a closed to an open contact position.

Abstract: An electrical circuit protective arrangement in which a reed spring relay has provided a back contact probe element associated with one of the springs and makes contact therewith when the normally closed springs are open and presents a gap with the associated spring when the springs are closed. The springs are serially connected in the electrical circuit and are of a magnetically responsive material so that the springs are forced open when an undesirably high current is present in the circuit which in turn completes a detection and alarm circuit when the probe element makes contact with the spring. The relay envelope contains a gas which ionizes in the gap to complete the same detection and alarm circuit when a dangerously high voltage appears across the gap although the springs remain closed.

Abstract: The invention relates to hermetically sealed contacts, electromagnetic devices using such contacts, as well as method and means for controlling such electromagnetic devices.

Abstract: A reed for a reed switch which comprises a body of conductive material having a contact section, an intermediate spring section, and a support section with the intermediate section being foil-thin and a contact section being substantially rigid and non-flexible and thicker than the intermediate section, and the intermediate section comprises a leaf spring having a flexibility permitting one end of the leaf spring to flex a substantial distance through an arc with respect to the other end of the leaf spring without exceeding the elastic limits of the spring, and the intermediate section being cold-worked to a point where said conductive material assumes a substantial change in physical characteristics, and said intermediate section is substantially harder, less ductile, and more dense than the contact section, and the body of said reed being of magnetic material.

Abstract: A reed switch relay includes an elongated bobbin surrounding a reed switch having a pair of axially extending leads. Supporting members extend longitudinally from opposite ends of the bobbin for mounting the bobbin to a circuit board, and resilient members for retaining the leads of the reed switch are integrally molded into the supporting members. The leads of the reed switch are bent downwardly and engage the resilient retaining members with a snap action. The downwardly extending ends of the leads protrude from the retaining members and serve as connecting pins for mounting the relay assembly to a circuit board or a socket.

Abstract: A reed switch is made by forming an envelope tube, non-circular in cross-section, with a known internal heightwise dimension, forming a reed element with two end-bearing portions at least one of which is part of a contact section of the reed element and an intermediate sealing-bearing section between and entirely out of a plane defined by the end-bearing portions of the reed, the distance between the plane and a bearing surface of the sealing-bearing section being greater than the internal heightwise dimension of the envelope tube; inserting the reed element into an open end of the envelope tube sufficiently far to cause both of the end-bearing portions and the bearing surface of the sealing-bearing section to bear against the inside wall of the envelope tube, the end-bearing portion of the contact section of the reed element bearing with a force greater than the force ultimately to be exerted by that portion in the finished switch; sealing at least a part of the sealing section in the envelope tube to seal s