Abstract: A balanced armature type relay includes a coil assembly 2 with a coil 20 and an ion core 21 extending through the coil 20, an armature assembly with a pair of frame-shaped upper and lower armatures 3, 4 disposed parallel to each other and so as to surround the coil 20, and a pair of contact units 6, 8 operated by the armature assembly. The coil 20 is covered with a molded portion 23 which has a pair of lateral studs 24 integrally formed with it, the studs 24 defining a horizontal axis about which the armature assembly is pivotal. High accuracy in the positional relation between the pole faces formed by extending ends of the iron core 21 and the respective ends of the armatures 3, 4 cooperating with the pole faces is achieved by the fact that both the pole faces provided on the iron core 21 and the studs 24 form part of the coil assembly which is formed as one common block.

Abstract: One end of a yoke is arranged near one end of an iron core of an electromagnet. The other end of the yoke is coupled to the other end of the iron core. The one end of the yoke has side walls which oppose the side surfaces of the one end of the iron core, and a bottom which opposes the bottom of the iron core. The magnetic pole at the other end of the iron core is guided to the other end of the yoke. A movable member is disposed at the one end of the iron core. The movable member comprises a permanent magnet disposed at the center of a frame, and iron pieces, one end of each of which abuts against the poles of the permanent magnet. The movable member partially surrounds the iron core so that the iron pieces are located between the iron core and the side walls of the yoke. The movable member is moved in the direction perpendicular to the axis of the iron core by the sum of the magnetic fields of the permanent magnet and the electromagnet.

Abstract: A polarized electromagnet comprises a generally E-shaped yoke including a pair of outer legs and an intermediate leg therebetween, the three legs being interconnected by a base portion, and a coil wound about the intermediate leg. A generally U-shaped armature comprises a permanent magnet and two pole plates attached to both ends of the permanent magnet. The armature is so positioned that each pole plate extends between the intermediate leg and a respective one of the outer legs of the yoke. The armature may be fitted into a generally U-shaped resin member integrally molded with portions extending outwardly to opposite sides of the pole plates and slidable engaged in guide slots provided in the outer yoke legs. When used in an electromagnetic relay, these projecting portions form actuating members engaging movable contacts of the relay.

Abstract: Having a core wound with the magnetizing winding, and a yoke separated from the core, and an armature which has the permanent magnets, both pole pieces of the core and the facing-surfaces of the yoke being positioned apart in a predetermined space; in said space the magnetic poles of the permanent magnets being stationed; and through a joint-work of the magnetic flux created by the magnetizing winding and the armature flux created by the permanent magnets the armature is made to relatively reverse-displace against the core and the yoke.

Abstract: A polarized electromagnetic relay including a coil body positioned over a core, and having at least one winding thereon. A permanent magnet is positioned in close proximity to the coil body. An armature externally embraces the coil winding and with the permanent magnet forms two working air gaps. Contact elements are provided embedded in a pedestal, the contact elements being disposed below the coil body. A monostable or a bistable switching behavior of the relay can be achieved by varying the design and disposition of the coil body, the windings, and one or more permanent magnets.

Abstract: An electromagnetic relay comprises a bobbin carrying a coil and having a longitudinal central bore through which an armature extends. A permanent magnet is disposed between the central webs of two generally U-shaped yokes, the legs of the yokes having end portions cooperating with end sections of the armature which project from the central bore of the bobbin. The armature is pivotal about a fulcrum formed near its one end, whereas the other end of the armature carries an actuating card for driving a contact spring disposed at the side, and parallel to, the bobbin. The contact spring is fixed at one end to a first contact terminal and has its other end disposed between two fixed contacts connected to second and third contact terminals. The three contact terminals are disposed along a line generally extending parallel to the bobbin. The coil is connected to two or three coil terminals arranged at the other side of the bobbin along a line which also extends generally parallel to the bobbin.

Abstract: In a bistable electromagnetic relay composed of a U-shaped yoke provided with excitation coils, the arms of the yoke are inserted between the pole-pieces of a pivotally mounted H-shaped armature comprising a permanent magnet. A flexible strip attached to the armature carries two movable contacts which are applied against two stationary contacts in order to provide an electrical connection between the contacts. Only a very small proportion of the flexible strip performs a conducting function, there is no permanent connection between the strip and a fixed terminal, and a very short path is provided for current flow. The double-break action of the relay has the effect of reducing stray capacitance between open contacts.

Abstract: In a transfer-type electromagnetic relay, movable contact studs are attached to both ends of a leaf spring (38) fixed onto an armature (39) for reducing the relay thickness. Leads (26, 27) for fixed contact studs are made of a soft magnetic material. Permanent magnets (46, 47) are placed transversely on the leads with poles of the same name brought nearer to the leads. When selectively magnetized by a coil (48) wound around a housing (21, 22), the armature is swung to carry out contact transfer with a high sensitivity. The relay is rendered self holding by the permanent magnet and the soft magnetic leads. Only one permanent magnet may be used for a current-holding relay. The leaf spring has transverse and longitudinal arms for insuring contact between the movable and fixed contact studs and connection of the movable contact studs to leads thereof.

Abstract: A polarized magnet system for a relay has a rotary armature having a pair of opposed parallel pole-piece plates which enclose permanent magnets and which terminate in spaced pole-plate piece ends which surround the pole-pieces of a coil core in clamp-like fashion and form working air gaps with the core. The ends of the ferromagnetic pole-piece plates are angled to form a tab in the direction of the coil core so that the working air gaps are shifted in the direction of the coil permitting the permanent magnets to occupy the entire distance between the pole pieces commensurate with the overall armature length.

Abstract: A miniaturized electromagnetic device is disclosed, which is applicable to an electromagnetic relay of the flat package type.The electromagnetic device comprises a magnetic core having the configuration of the capital letter H, a coil wound round the magnetic core, and a pair of magnetic members for alternatingly forming two closed magnetic circuits in cooperation with said magnetic core, said magnetic members being formed in one-piece with the aid of connecting members of non-magnetic material, one of said magnetic members including a permanent magnet, and each tip of said magnetic member confronting the corresponding tip of said magnetic core and the clearance therebetween being changeable by the magnetic force generated therebetween as said coil is energized.

Abstract: An electromagnetic relay provided with a rotating armature and two yoke arms, which form equally acting working air gaps, a monostable switching characteristic being achieved by means of respective additional pole pieces, whereby each yoke arm of the relay is disposed between a respective pole piece and a cooperable leg of the armature, at least one of the pole pieces being coupled to the armature over a permanent magnet.

Abstract: A permissive make double throw electromagnetic switch having maximum efficiency in utilizing electrical energy supplied thereto, though being extremely small and compact for use on printed circuit boards. The means for moving the contact actuator comprises a pivotal armature which carries a permanent magnet and a pole piece whereby the permanent magnet causes the pole piece to be drawn into engagement with the core of an electromagnetic winding to thereby move the armature to a retracted position. Energization of the winding causes the armature to be drawn into attracted position in engagement with the core, the flux path through the armature being directly through the core and other flux-conducting means.