Low profile relay

An electromagnetic relay comprising:

• an E-shaped yoke having a center leg and two side legs each spaced from and generally parallel with a side of the center leg, each leg having a free end and being interconnected by a joining portion;
• a discretely formed bobbin of electrically insulating material having a generally elongate rectangular shaped spool member with a yoke exciting coil wound therearound and confined between a first and a second end wall, said bobbin having a yoke receiving hole therein dimensioned for receiving the center leg of the yoke wherein the free ends of the yoke legs project past said second end wall with said joining portion of the yoke disposed in juxtaposition with said first wall, said second end wall having a recess defined in part by the yoke receiving hole and in part by an adjoining slot in the second end wall and having two coil terminals each disposed in a receiving alcove formed in a portion of said second end wall;
• discretely formed card made of electrically insulating material generally having a rectangular shaped body portion having a hole therein, and having a projection laterally extending at a side of the base, and having an armature stop projection integrally formed at a top side, said card being disposed vertically in upward and downward movable manner adjacent the second end wall of said bobbin wherein said center arm of the yoke extends through the hole in the card,
• a discretely formed stationary contact block formed of electrically insulative material having a generally rectangular shaped body portion with a recess in a top side dimensioned to receive the free end of said center arm, and having two spaced apart holes each aligned and dimensioned for receiving a respective free end of the side arms of said yoke, and having a generally rectangular shaped tongue portion vertically aligned below the recess in the top side and extending substantially in parallel juxtaposition below the center arm through the hole in the card, said tongue having an end portion received in the recess in the second end wall of the bobbin in force fit between a portion of said bobbin and a portion of the center leg of the yoke wherein said bobbin and said stationary contact block are mechanically secured together with the card interposed therebetween, and having a stationary contact extending in a direction toward the bobbin;
• a first spring blade disposed at one side of the base projection of said card and having a free end containing a movable contact aligned for contacting said stationary contact under the spring bias of said first spring blade with said card disposed to a first vertical position;
• a second spring blade disposed at the other side of the base projection of said card and having a free end containing a movable contact aligned for contacting said stationary contact under the spring bias of said second spring blade with said card disposed to a second vertical position;
• an armature assembly resiliently held spaced from the yoke by means of a biasing means, said armature assembly having an armature at its free end and a card pusher arm means, and having a ledge portion aligned for contacting said armature stop projection to define the upper most position of said armature assembly;
• and
• biasing means for urging said card into said second vertical position;
• wherein with said card being disposed into said first vertical position by means of said pusher arm means with the armature being attracted to the yoke with an excitation of the coil, thereby the base projection of said card being downwardly disposed so as to both enable said first spring blade to urge its movable contact into engagement with the stationary contact and to contact said second spring blade causing downward displacement of its movable contact out of engagement with said stationary contact, and with deenergization of the yoke said card being disposed into said second vertical position under influence of said biasing means whereby the base projection of the card being upwardly disposed so as to enable said second spring blade to urge its movable contact into engagement with the stationary contact and to contact said first spring blade causing upward displacement of its movable contact out of engagement with said stationary contact.