1. A relay including: a first elongated tubular-shaped envelope; a second tubular-shaped envelope affixed to said first envelope intermediate the ends thereof and extending radially outwardly with respect to said first envelope, said first and second envelopes defining a common sealed internal chamber; a first terminal rod extending through one end of said first envelope and supported thereby in coaxial relationship with said first envelope; a second terminal rod extending through the end of said second envelope and supported thereby in coaxial relationship with said second envelope; a movable contact hinged to the inner end of said second terminal rod in electrically conductive relationship therewith and extending from said inner end across the lower extremity of said first terminal rod selectively to contact said extremity; an electromagnetic actuator mounted at the other end of said first tubular-shaped envelope; an armature mounted within said first envelope adjacent said actuator to be selectively moved thereby between first and second operative positions; a connecting rod coupled to said movable contact and to said armature for causing said movable contact selectively to contact said extremity of said first terminal rod as said armature is moved from one of its operative positions to the other, and which includes a magnetic core structure incorporated in said actuator and extending into the interior of said first envelope, and in which said armature is hinged to said core structure and normally spring biased to a tilted position with respect thereto.