Swtitch plate locking covere attachment

Claim 1

FOR USE AN ELECTRICAL WALL-TYPE SWITCH HAVING A STANDARD FACE PLATE WHICH IS MOUNTED BY STANDARD FACE PLATE SECURING SCREW MEANS AND THROUGH WHICH A MANUALLY ACTUATED SWITCH OPERATING MEMBER EXTENDS THAT IS ACCESSIBLE FOR MANUAL ACTUATION, AN ATTACHMENT ADAPTED TO BE MOUNTED IN OPERATIVE ASSOCIATION WITH THE SWITCH FOR SELECTIVELY RENDERING THE SWITCH OPERATING MEMBER INACCESSIBLE TO PREVENT UNAUTHORIZED MANUAL ACTUATION THEREOF COMPRISING: A GENERALLY PLANAR MOUNTING MEMBER HAVING AN OPENING THROUGH WHICH THE SWITCH OPERATING MEMBER MAY EXTEND AND OPENING MEANS FORMED THEREIN AND ARRANGED TO HAVE THE STANDARD FACE PLATE SECURING SCREW MEANS EXTEND THERETHROUGH TO RIGIDLY MOUNT SAID MOUNTING MEMBER TO THE FRONT OF THE STANDARD FACE PLATE IN CONTIGUOUS PARALLEL RELATIONSHIP THEREWITH WITH THE SWITCH OPERATION MEMBER EXTENDING THROUGH SAID OPENING AND ACCESSIBLE FOR ACTUATION; AND A COVER PIVOTALLY SECURED TO SAID MOUNTING MEMBET BETWEEN AN OPENED AND A CLOSED POSITION BY HINGE MEANS FORMED PARTIALLY ON AND DISPOSED AT ADJACENT END PORTIONS OF SAID MOUNTING MEMBER AND SAID COVER, SAID CONFIGURED SUCH THAT WHEN IN OPENED POSITION IT DOES NOT PREVENT ACESS TO THE SWITCH OPERATING MEMBER AND WHEN IN CLOSED POSITION IT OVERLIES SURROUNDS THE PORTION OF THE SWITCH OPERATING MEMBER THAT EXTENDS THROUGH THE FACE PLATE AND MOUNTING MEMBER AND RENDERS IT INACCESSIBLE FOR ACTUATION; AND SELECTIVELY OPERATED LOCKING MEANS FOR LOCKING SAID COVER IN ITS CLOSED POSITION DISPOSED AT ADJACENT END PORTIONS OF SAID MOUNTING MEMBER AND SAID COVER THAT ARE OPPOSITE TO THE FIRST MENTIONED ADJACENT END PORTIONS, SAID LOCKING MEANS COMPRISING A LOCKING LUG FORMED OUT OF SAID MOUNTING MEMBER AND EXTENDING INWARDLY OF SAID COVER WHEN THE LATTER IS IN CLOSED POSITION AND A MANUALLY KEY-OPERATED LOCK CARRIED BY SAID COVER AND HAVING A LATCHING DETENT THAT IS ARRANGED TO SELECTIVELY ENGAGE AND DISENGAGE SAID LOCKING LUG TO EITHER LOCK OR UNLOCK SAID COVER RELATIVE TO SAID MOUNTING MEMBER.