Releasable suspension device for supporting conductors from masts

Claim 1

A SUSPENSION DEVICE FOR SUPPORTING A CONDUCTOR FROM A MAST AND FOR PROTECTING THE MAST AGAINST EXCESSIVE LONGITUDINAL FORCES IN EVENT OF BREAKAGE OF THE CONDUCTOR, COMPRISING: TWO HINGEDLY CONNECTED PARTS; MEANS FOR CONNECTING ONE PART TO THE MAST; MEANS FOR CONNECTING THE OTHER PART TO THE CONDUCTOR; ONE OF SAID PARTS INCLUDING A HEAD HAVING A CONVEX SURFACE AT ONE SIDE THEREOF AND A KNIFE EDGE ON ANOTHER SIDE THEREOF; THE OTHER OF SAID PARTS BEING FORMED WITH A CONCAVE SURFACE ENGAGEABLE BY THE CONVEX SURFACE OF SAID ONE PART, AND WITH AN INDENTATION IN WHICH SAID KNIFE EDGE OF SAID ONE PART IS RECEIVED, SAID CONCAVE SURFACE HAVING A RADIUS OF CURVATURE GREATER THANT THE HEIGHT OF SAID ONE PART BETWEEN SAID KNIFE EDGE AND SAID CONVEX SURFACE, WHEREBY SAID CONVEX SURFACE OF SAID HEAD SLIDES ON SAID CONCAVE SURFACE, AND SAID KNIFE EDGE BECOMES UNSEATED FROM SAID INDENTATION, WHEN A PREDETERMINED ANGLE BETWEEN THE TWO PARTS IS EXCEEDED CAUSED BY AN EXCESSIVE LONGITUDINAL FORCE CORRESPONDING TO THAT OCCURRING UPON BREAKAGE OF THE CONDUCTOR.