Fastening devices for linemen's rubber blankets

Claim 1

IN COMBINATION, A LINEMAN''S INSULATING BLANKET, A FASTENING DEVICE FOR SECURING TOGETHER OPPOSING FOLDS THEREOF, COMPRISING (A) A FIRST FASTENING MEMBER HAVING (B) A RIGIDLY SUPPORTED NON-MAGNETIC ACTIVE SURFACE, ATTACHING MEANS IN THE FORM OF BUTTON AND BUTTONHOLE SECURING SAME TO ONE OF SAID FOLDS, SAID ATTACHING MEANS PERMITTING SUBSTANTIAL FREEDOM OF MOVEMENT OF SAID FIRST FASTENING MEMBER WITH RESPECT TO THE BLANKET SURFACE WHEREBY RANDOM FORCES ACTING UPON THE BLANKET ARE SUBSTANTIALLY PREVENTED FROM EXERTING A PEELING ACTION WITH RESPECT TO SAID ACTIVE SURFACES, (C) A SECOND FASTENING MEMBER HAVING A RIGIDLY SUPPORTED NON-MAGNETIC ACTIVE SURFACE COMPLEMENTARY TO SAID ACTIVE SURFACE FIRST MENTIONED, ATTACHING MEANS IN THE FORM OF BUTTON AND BUTTONHOLE SECURING SAME TO SAID OPPOSING FOLD OF THE BLANKET, (D) SAID ACTIVE SURFACE LAST MENTIONED BEING CAPABLE OF BEING UNITED TO SAID ACTIVE SURFACE FIRST MENTIONED WHEN SAID SURFACES ARE PRESSED TOGETHER, THE UNION SO FORMED RESISTING STRONGLY A DIRECT PULL NORMAL TO SAID SURFACES, BUT BEING READILY BROKEN WHEN A FORCE IS APPLIED TO PEEL ONE OF SAID SURFACES FROM THE OTHER.