Abstract: An electromagnetic contactor having an electromagnet consisting of a fixed core and an operating coil mounted on the fixed core, a plurality of fixed contacts, a crossbar disposed above the fixed core, a plurality of contact bars associated with the crossbar and each provided with a pair of movable contacts located opposite the corresponding fixed contacts, respectively, a movable core joined to the lower portion of the crossbar opposite to the fixed core, and a rigid frame consisting of two parallel polygonal bars and two parallel connecting bars interconnecting the respective opposite ends of the polygonal bars. The crossbar and the movable core are supported pivotally on the rigid frame.

Abstract: An electromagnetic relay for use in a high-frequency circuit includes an armature 3 mounted on a central shaft 16 for pivotal movement between two switching positions. A total of four actuator cards 5 are disposed on two opposite sides of the armature 3, each card carrying a contact spring 8. Each contact spring serves to bridge a pair of fixed contacts 6, 7. The contact springs and fixed contacts are located in shield casings 9 disposed on both sides of the armature 3. Return springs 19 urge the cards 5 into abutment with the respective sides of the armature 3. Sufficient electrical separation as required for high-frequency applications is achieved between the two contact systems due to the intermediate disposition of the armature 3. The provision of an individual actuator card 5 for each contact spring 8 permits independent adjustment of each contact.

Abstract: A coil wire has a lubricant film formed on an outer surface of an insulation film covering a conductor. The lubricant film is made of polypropylene glycol or a material obtained by substituting a hydrogen atom at at least one end of polypropylene glycol with another reactive group so as to provide a coil wire wherein generation of organic gases can be suppressed.

Abstract: Reduced base plate dimensions are provided for an electromagnetic relay of the kind having a flap type armature by disposing the core which carries a spool and the winding therein perpendicular to the base plate with its free end spaced from the base plate sufficiently for the armature to swing between the free end of the core and the base plate, while being hinged in a seat at one end of the armature provided in the magnet yoke. Support for the magnetic system of the relay, which like the base plate assembly is a preassembled unit is provided by anchoring portions (29) of the magnet yoke which lie against the armature seat and are so set in the base plate when the two subassemblies are put together, that the free end of the core is in the position described. A leaf spring carrying the switch contact as an aperture stamped out in it for centering the armature. The switching path connections are very short and various details are provided to simplify assembly and adjustment of the relay in mass production.

Abstract: A miniature electromagnetic relay having a magnetic block and at least two sets of stationary electrical contacts. A moveable contact arm having a mounting end positioned in a base and two contact carrying portions extending from the mounting end. The improvement including a center tab portion on the moveable contact arm extending from the mounting end, between the extending contact carrying portions, and at a distance less than said contact carrying portions. The switching of the moveable arm from one set of electrical contacts to the opposite set being caused by the controlled energization of the magnetic block, which engages the tab of the moveable arm, causing closure of both contact carrying portions with the stationary electrical contacts at a lower electromagnetic force requirement and causing a more consistent relay operation.

Abstract: An improved power-switching relay especially designed for mounting on printed circuit boards together with a method for manufacturing such a relay. The relay includes a number of features designed to properly position the various relay components relative to one another and to help ensure that they remain in the proper position at all times. To this end, the relay includes a unitary bobbin (22) and stationary contact support header (33) together with means (64) for firmly retaining the stationary contacts (34, 36) and their terminals (63, 73) in place in the header. The relay also provides means to prevent rotation of the armature relative to the movable contact assembly (53, 54) and to prevent rotation of the coil assembly relative to the frame (35). According to a further aspect of the invention, the core and coil assembly is attached to the relay frame by extending the core through the coil assembly and press-fitting the core into an extruded hole (14) in the frame.

Abstract: The auxiliary contact assembly comprises a two part casing having an upper section for receipt of the fixed contacts provided with the connecting screws and a lower section having the shape of a trough open on top and mounted to the upper section by means of locking detents. The fixed contacts are clamped into recesses located in the upper section and open at their sides. A at the bottom open channel is formed at the upper section and acts as guide for the contact bridge carrier. The side walls of the trough-shaped lower section enclose the fixed contacts in the recesses and are provided with narrow projections extending upwards into the area of the connecting screws and form thereby a protection against accidental contact. The contact bridge carrier which is provided with a plurality of contact bridges is guided at the bottom by the lower section of the casing. The lower section is provided with mounting elements and a through hole for the coupling member of the contact bridge carrier.

Abstract: An electromagnetic relay especially such a relay with a spring jack, that serves for holding the magnet coil and the contact spring jump. In the simplest form of the relay, it includes the feature that the individual contact springs of the contact spring jump are provided with one piece fitted flat plugs, which are positioned in grooves in the ground wall of the spring jack, and in such position are securely fixed from the standpoint of strength and form.

Abstract: A silicon substrate (2,22) having a SiO.sub.2 layer (4,24) grown on its upper surface and a metallization layer (6,26) of magnetic material subsequently deposited on the upper surface of the SiO.sub.2 layer is etched to define a cantilever beam (8,38) extending over a recess (12,32) in the substrate (2,22) having a magnetic layer (6,26) along the top surface thereof. The resulting structure is subsequently masked with a photoresist layer to enable a second layer (14,34) of magnetic material to be deposited on the first layer. The photoresist layer is stripped forming a second magnetic layer (14,34) projecting from the unsupported end of the cantilever beam over and spaced from a fixed stop (10,30) of magnetic material adjacent the unsupported end of the cantilever beam. In one version the magnetic material (6,14) serves as electrical current carrying contacts which close upon application of a magnetic field to the switching device.

Abstract: An electromagnetic relay is provided which has a core yoke embedded in a base body, the core yoke comprising a yoke leg at both coil ends which proceed perpendicular to the coil axis. A U-shaped armature has its first lateral leg seated on the first yoke leg and has its second lateral leg forming an operating air gap relative to the second yoke leg. A contact and bearing spring is secured to the armature, the contacting end of the contact and bearing spring laterally embracing the armature and the core yoke and interacting at that side of the core yoke which lies opposite the armature with at least one cooperating contact plate.

Abstract: An electromagnetic relay wherein a force-transmitting member or actuator is carried by the armature to engage the contactor, which carries a moveable contact, such as to provide several different mechanical advantages in moving the moveable contact into firm engagement with a stationary contact. The actuator is provided with an inclined surface such that when the electromagnetic force on the armature is minimum, the actuator engages the contactor in a particular location to provide a mechanical advantage which requires minimum force in moving the moveable contact, and thereafter when the armature is within its strong magnetic force range, the inclined surface causes such actuator to engage the contactor in a different location to thereby provide maximum travel in urging the moveable contact into engagement with the stationary contact.

Abstract: In a compact electromagnetic miniature relay comprising a contact spring (12) which is firmly clamped at one end, and which bears double contacts (9, 10) arranged on each side, and with the connecting line thereof extending vertically in relation to the longitudinal axis of the contact spring, and which are capable of being moved by an actuator (6) arranged on the armature (5), from stationary break contacts (7) to stationary make contacts (8), with said contact spring (12) being divided by a longitudinal slot (16) partly into two parallel spring legs (19, 20) pretensioned against the break contacts (7), and in which the actuator (6) engages between the clamping point (13) and the free end (11) of the contact spring, the actuator (6), according to the invention, is designed to have at least the same width as the contact spring (12) at the actuating point (17), with the longitudinal slot (16) beginning at a small spacing from the actuating point (17) and extending up to the end (11) of the contact spring (12),

Abstract: An armature/contact system wherein the armature rotates about a given axis, and a contactor is mounted thereon for movement therewith. The contactor is so formed as to have a resilient member having a contact surface which is within a plane which includes the axis of rotation of the armature. A stationary contact is provided for engagement by such contactor, such stationary contact having an arcuate contact surface. Limit-stop means is provided for defining the position of the contactor surface within a plane which intersects the axis of the armature whenever the contactor surface and stationary contact surface are out of engagement with each other.

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: The rotating armature relay exhibits one or two ferromagnetic bars which are provided with an insulating covering in their central area. Contact springs are secured in the insulation covering, the contacting, free ends of said contact springs respectively interacting with cooperating contact elements anchored in a base body. As a result, a slide-free and, thus, low-friction actuation derives as, however, does relatively high friction at the contact locations, whereby contact impacts are suppressed and foreign layers are abraded from the contact surfaces.

Abstract: A relay structure advantageous for compacting purpose is disclosed herein. The relay comprises a generally L-shaped yoke having an upright yoke leg and an upper yoke member extending substantially at a right angle thereto, the upright yoke leg being connected to one end of the core of an energizing coil which extends substantially in parallelism with said upper yoke member. The upper yoke member is formed with a center slot extending longitudinally thereof to be open at both longitudinal ends. A generally L-shaped armature is hingedly supported onto the free end of the upper yoke member with a tab extending across the air gap defined between the free end of the upper yoke member and the opposite end of the core. Extended from the upper end of the tab is an actuator arm which is received in said slot and on which overlies a spring blade carrying at its free end a movable contact.

Abstract: In an electromagnetic relay, a bridge contact arrangement whereby cooperating contact elements are disposed in one common plane lying next to one another. One of the cooperating contact elements angularly cantilevers over the free end of the other, shorter cooperating contact element with a cross-leg. In this manner the contact element can be provided with contact pieces aligned and properly spaced with one another. An armature-carried contact bridge spring serves to engage the contact pieces of the contact elements with equal contact pressure. The invention construction offers a simplified, reliable relay manufacture.

Abstract: A relay for switching of ultra high frequency circuits has three spaced-apart coaxial type contacts including a central or common contact. Two contact blades are disposed in opposed relation to the coaxial contact for alternate movement from a first position in which one rigid contact engages the central coaxial contact and one side contact while the other rigid contact is grounded, and a second position in which the other rigid contact engages the central contact and another coaxial contact and the first rigid contact is grounded. Pusher elements connected to the respective rigid contacts are connected to opposite sides of a leaf spring supported at its center. A pivotal armature alternately presses on one end or the other of a leaf spring to drive one rigid contact against its two coaxial contacts and to permit the other end of the leaf spring to pull the other rigid contact into engagement with the ground plane.

Abstract: A miniature DIL relay comprising a motor unit and a casing (1) housing the motor unit (2) and including opposed sidewalls (14, 14a) of insulating plastics material, each sidewall having embedded therein a conductor frame providing external connection terminals (15, 16, 17) of the relay and supporting the fixed and moving relay contacts (8, 11, 6, 7) in the casing, the motor unit having a bobbin with a pair of external connection terminals (18, 21) mounted thereon which project through the casing and which are connected to the motor unit winding.

Abstract: A magnetically actuated proximity switch is provided with a double-pole double-throw contact arrangement. To substantially equalize the contact pressures between the two poles a movable armature, to which the movable contacts are firmly attached, is loosely pivoted to rotate about a transverse axis to open or close the contacts and to rock about a longitudinal axis to divide the available operating force between the two poles of the switch.

Abstract: An electro-mechanical relay, particularly for automotive use, characterized by quietness of operation in which the armature coil, spring arm and contact elements are so arranged that the mating surfaces of the contact elements lie substantially in a single plane when in open position and are closed without audible noise by relative sliding movement in said plane.

Abstract: In an air break contactor, the armature comprises a first lamination and two second laminations, the first lamination having at a lower end an extension projecting at a 90.degree. angle with respect to the body of the lamination into a space between the bottom wall of the housing and the free end of a lower leg of the magnet assembly core member. The entire armature rests on an elbow of the lamination extension, while the second laminations are disposed between a pair of tabs extending from respective lateral edges of the first lamination.

Abstract: A retaining plate for use in a magnet system of an electromagnetic relay, the magnet system having an angled yoke with a yoke leg disposed parallel to the coil axis and the yoke being secured at both sides in longitudinal grooves of a relay base, is comprised of elastic material and is disposed at the side of the yoke leg facing the coil and has a central portion supported against the yoke leg which is held at both sides in longitudinal grooves of the relay base with bent lateral tabs. The retaining plate can simultaneously serve as a separating plate with a hooked tab extending through the yoke leg and having a portion disposed between the yoke leg and the relay armature.

Abstract: The electromagnetic device comprises three parts of a coil spool, a yoke and a terminal block combined solidly, whereby the terminal block is held between a collar of the coil spool and the yoke, and both the ends of an iron core are fixed to the coil spool and the yoke.

Abstract: Electrically conductive paths are selectively engaged by a pair of electrical contacts that are carried in a pair of holders. Each holder is pivoted by an actuator. Each holder also carries a spring biased detent plunger that cooperates with V-shaped cavities in a switch housing to provide an over-center feel.

Abstract: A permanent magnet type printing head for an impact dot printer wherein a plate spring hammer has a hammer tip provided on one side thereof, and an attracting magnetic pole provided with a releasing electromagnetic coil arranged on the side opposite said hammer, wherein an armature is provided on the upper surface of the plate spring hammer instead of providing same on the same side of a magnetic pole, and wherein an arm of a yoke constituting a main magnetic path is provided on the plate spring hammer, and the magnetic pole is positioned between the hammer tip and the armature.

Abstract: Integral posts on the molded base limit rotation of a lower contact carrier, and a contact guide limits rotation of an upper contact carrier, the carriers being spring biased for slidable movement on a lifter post attached to the armature of the relay.

Abstract: An electromagnetic relay has a coil spool having a hollow interior serving as a chamber for a number of relay contact elements which are actuated by a flat armature. A contact mount carrying contact springs is inserted into the coil spool at an open end thereof, with the opposite end of the coil spool being closed by an end wall having stationary contact elements embedded therein. The coil spool has an opening beneath the winding for adjustment purposes, which is sealed by a foil prior to the application of the winding.

Abstract: A miniature magnetic latch relay including a support header, a permanent magnet, an armature in pivotal contact with the magnet and engaging a pair of switch contacts movable between corresponding pairs of fixed contacts, the armature being pivotally movable between two stable positions in response to selective energization of two electromagnetic coils, and a frame mounted in spaced relation to the header having magnetic core sections for the coils and pole piece sections for the armature, the frame supporting the permanent magnet and having an opening through which the magnet extends for pivotal contact with the armature. A barrier of non-magnetic material in the frame around the opening resists magnetic flux flow between the permanent magnet and the frame portion near the opening thereby forcing magnetic flux to flow between the permanent magnet and the armature.

Abstract: An electromagnetic relay has an armature and a number of contact elements disposed in the hollow interior of the spool about which the coil is wound. The contact elements are held in position by respective contact mounts which are inserted in the axial direction from both open end faces of the coil spool. The contact mounts are U-shaped within the coil spool and are aligned therein by the engagement of ribs carried on the contact mounts with corresponding guide grooves in the interior of the coil spool, thereby accurately and fixedly positioning the contact elements.

Abstract: Disclosed herein is a combination relay, suppression resistor and end of cycle bell in a compact unitary assembly intended for use in a microwave oven. The size of the relay is reduced by employing a bifurcated contact strip which has legs surrounding the relay coil pole piece and a contact actuator which is U-shaped to move within a plane which intersects the coil and bobbin. A plastic housing encloses these components and provides a support for the bell. The surge suppression resistor can be a few turns of magnet wire wrapped around the protective covering on the relay coil core.

Abstract: Electric contact switching device comprising a plurality of contact member pairs, each pair consisting of a first lead member having a first contact and a second lead member having a second contact which are disposed in mutually opposed relation, a first insert-molded base member having a compartment and carrying the first and second lead members so as to house the first and second contacts within the compartment thereof, a second insert-molded base member carrying the second lead members, and contact driving means for driving the first and/or second contacts to provide switching operations, said first and second base members being connected through the second lead members each other.

Abstract: Electric assembly including an insert-molded base member carrying connecting terminals, an electric block member mounted on the base member, and an upper cover fitted onto the base member to cover the electric block member, said base member comprising inner and outer walls which therebetween form an opening extending vertically through the entire thickness of the base member in such a manner that a lower portion of the upper cover and the terminals are exposed to the opening, said opening being filled with a sealant so that the upper cover, terminals and base member may be firmly secured together in position.

Abstract: An electrical relay is provided with bifilar windings defining a first coil and a single winding defining a second coil. Each of the bifilar windings is connected in series with an RC network and this circuit is connected in parallel with the transmission line. When an AC current flows in the transmission line and through the bifilar windings and single winding, this does not cause the armature to move. When a DC current flows in the transmission line, it flows through the bifilar windings but is blocked by the RC network from flowing through the single winding which causes the leg of the armature to be attracted to the bifilar windings coil thereby operating the relay.

Abstract: The relay contains an excitation coil, a U-shaped yoke with one of its legs serving as the core of the coil, and an armature to operate at least one switching contact of a contact carrier unit. This unit contains a supporting bridge which extends essentially perpendicularly to the axis of the coil and which carries the contact finger(s) of the switching contact(s). The contact carrier unit is fastened to the free leg of the yoke. One edge of the face end of the free yoke leg serves as knife-edge bearing for the armature. The armature is fastened to the free yoke leg by a holding element. In order to make the relay compact and easy to assemble, the armature is angularly formed, thus having a magnetically active leg and a free leg. The free leg which does interact with the core of the coil extends essentially parallel to the free yoke leg. The contact fingers are positioned essentially parallel to the axis of the coil. The supporting bridge is provided with a fastening piece.

Abstract: An automatic trip device for a circuit breaker includes a U-shaped stationary iron core disposed around a current-carrying conductor. The stationary core includes a semicircular recess on one leg thereof having V-shaped bearing surfaces formed at each end of the recess. A movable iron core is positioned across the legs of the stationary core and includes semicircular projection fitted into the recess of the stationary core. A shaft extends through the projection and pivots at each end in one of the V-shaped bearing surfaces. Tension springs connected between the stationary core and one end of the movable core produce opening rotational bias on the movable core. Electromagnetic force produced by an over-current flow through the conductor causes closing rotational movement of the movable core. The disclosed construction results in elimination of undesireable sound vibrations produced in prior art devices under conditions of current flow below overload level.

Abstract: An electrical relay assembly is shown having a mounting base carrying a plurality of electrical terminals extending from one side thereof (for connection to associated electrical circuits) and a relay winding and armature at the other side thereof; the ends of the relay winding are effectively isolated as to prevent breakage of the wire comprising the winding due to any vibrations or shock induced as into the mounting base; the armature is provided with bearing surfaces which effectively minimize and reduce frictional resistance to movement of the armature; and a housing is illustrated as being capable of being secured by various mounting apparatus to associated support structure.

Abstract: An electromagnetic relay has a flat armature which is normally biased away from a pole plate by a bearing spring attached to the armature which is mounted in a recess in a yoke plate, and is clamped thereto. A particularly low friction mounting is achieved by specific selection of the ratio of the distance between the bearing point of the armature and the clamping point of the bearing spring, to the distance between the point of attachment of the bearing spring to the armature and the bearing point.

Abstract: An electromagnetic relay mounted within a casing comprises a coil provided with an axial core forming a magnetic circuit with a yoke and two L-shaped armatures. A first arm of each armature consists of a magnetic plate while a second arm serves to actuate movable contacts. The ends of the second arms cooperate with each other by interengagement of lugs so as to ensure synchronous operation of the armatures.

Abstract: The relay includes an "L"-shaped yoke and a cylindrical solenoid core mounted at end thereof in a hole in the short arm of the yoke. The other end of the core is terminated in a pole plate which engages one leg of an angle armature which is pivotally mounted at the end of the long arm of the yoke. The other leg of the angle armature is biased toward the long arm of the yoke by a flat leaf spring. The spring is mounted at one end thereof to the long arm of the yoke and includes a free end which projects through a slot in the other end of the angle armature for engaging a flattened portion of the angle armature at the apex edge of the angle armature. Upon deactivation of the relay, the angle armature is swivelled away from the pole plate until the flat spring is flatly applied to the flattened portion of the angle armature, thereby defining the deactivated end position of the armature.

Abstract: Electrical relay apparatus in which a contact spring (35) is bowed rather than angularly flexed by the armature (16) to bring the contacts (28, 38, 34, 39) into or out of engagement. A first contact (38) is mounted at the crown of a slightly bowed spring (35) fixedly mounted at one end. The contact (38) is mounted at near the midpoint of the spring (35) spaced apart from a second, fixed contact (28) and the contacts (28, 38) are brought into engagement by the further bowing of the spring (35) by an armature (16) acting along the spring axis in the direction of its fixed end. A second contact (39) mounted on the underside of the spring (35) may be brought out of engagement with a second fixed contact (34) by the further bowing of the spring (35) for a break-before-make mode of operation.

Abstract: A miniature sealing-tight relay having components which are disposed in a plastic material casing especially suited for use as a telephone relay. The casing has a belt having walls in which a magnetic circuit, a coil and the associated connections are moulded; one or two side plates are welded to belt 1 and the fixed contacts and the components for securing and pivoting moving contacts are moulded therein.

Abstract: An electrical device, which preferably forms a plug-in relay unit, includes a terminal board assembly most advantageously formed by a pair of insulating plates made of thermoplastic material and between which are clamped the intermediate laterally extending portions of terminal blade members having outer portions projecting transversely beyond the outermost plate constituting a base plate and transversely innermost portions projecting beyond the innermost plate constituting a clamp plate. One or more of the terminal blade members carry stationary contacts on the inner ends thereof. The insulating plates are held secured together and a bobbin assembly having thermoplastic pins are passed through apertures in the base assembly and ultrasonically vibrated to weld the same to the walls of the apertures.

Abstract: An electromagnetic relay having a magnetic system actuatable to displace a movable contact element to make and break with at least one fixed contact element is provided with an insertable member of insulating material which has a vertical wall dividing the interior of the relay into essentially non-communicating portions respectively containing the contact elements and the magnetic system. The portion containing the magnetic system is further surrounded by opposed parallel lateral walls which, with the vertical wall, provide an insulating enclosure for the magnetic system. The magnetic system includes a yoke which has projections thereon slidably received in vertical grooves in the lateral walls. The lateral walls are sufficiently expandable such that during assembly the yoke can be inserted in the grooves in a snap-in manner. The yoke is attached to the magnetic coil so that no further structure is required to support the magnetic system.

Abstract: An electromagnetic relay comprising a base of insulating material carrying stationary and movable contacts and output lugs, and a motor assembly, the latter comprising a right-angled yoke, a core with its coil, crimped to the inner face of a first one of the two flanges of the right-angled yoke, and an armature pivotally mounted to the free end of the second flange of said yoke and having bent arms operable to actuate the movable contacts when the base is fixed to the outer face the second flange and the coil is energized. The coil has a spool or frame with at least one end flange provided with metal tongues for coil connection extending towards the base and passing through apertures in the second flange of the yoke, said tongues resiliently engaging inner ends of associated ones of said output lugs.

Abstract: An electromagnetic relay is provided in which the housing therefor is divided into two space areas, namely, one for the contacts, which is sealed off from a coil space area. The contact space is substantially sealed from the coil winding by having the carrier for the movable armature, the movable contacts and the stationary contacts on one side of a base body, and the coil on the other side. The contact area is provided by the base body and a protective cap. Stationary contact terminals are embedded in the wall of the base body. Spring biased movable contacts are mounted in the contact space. The protective cap closely adjoins the base body. The coil has a ferromagnetic core which at opposite ends of the coil have uprising flanges which form pole shoes. These flanges extend through openings in the base body in proximity to the armature.

Abstract: A wire printer including a group of substantially straight and parallel printing wires or needles guided at their front end for longitudinal movement towards and away from a printing station. Each of the printing wires is at its rear end connected to one end of an electromagnet armature the other end of which is supported by a flat spring. The armature cooperates with an electromagnet core provided with a winding. The core as well as the armature consist of strips of magnetic material. The core strips as well as the flat springs are mounted on at least one common rod engaging holes in the rear ends of said core strips and flat springs. The front end of each of the flat springs lies clear of the armature strip and serves, in combination with a stationary rest, to provide a force tending to move the front end of the armature strip away from the core strip.

Abstract: A contact spring arrangement for an electromagnetic relay includes a contact spring forming at least one movable contact for cooperation with a fixed contact, and an actuator which embraces the contact spring and has a first portion for moving the movable contact towards the fixed contact, thereby closing the contact couple, and a second portion for withdrawing the movable contact from the fixed contact, thereby opening the contact couple. The actuator is so shaped that the distance between the location at which the first actuator portion engages the contact spring and the contacting location of the contact couple is greater than the distance between the location at which the second actuator portion engages the contact spring and the said contacting location.

Abstract: An electromagnetic relay comprising a flat electromagnet, a movable plate member having on a lower surface a plurality of projections and a contact circuit device as stacked up together, said contact circuit device including a plurality of contact switching members each of which consists of a single movable blade and a single stationary contact, said movable blade being biased by the projections in accordance with their movement so as to provide a switching operation in cooperation with the corresponding stationary contact.

Abstract: A flat electromagnetic relay which includes a base member having at least two projections extending from a flat surface thereof. At least one hole (or indent), fitting a pertinent one of the projections, is formed in each supporting block that holds a contact, yoke, a hinging spring, or the like. These and similar members are successively stacked on the surface of the base member, with the projections fitted through the holes in the supporting blocks. The free ends of the respective projections are then deformed to secure and hold the components in position. A contact actuating card is put in place after the stack of contact holding blocks is assembled and locked in position. The block through which a contact carrying leaf spring is molded preferably has an end surface formed at an angle such that a portion of the leaf spring may be subsequently bent to extend substantially perpendicular to the remainder of the leaf spring, thereby forming a solder terminal.