Electric shunt device

Claim 1

A SHUNT DEVICE FOR CONNECTION IN PARALLEL WITH THE FILAMENT OF AN ELECTRIC LAMP CONNECTED IN A SERIES CIRCUIT COMPRISING: A METAL CASING HAVING A BOTTOM WALL PORTION, SIDE WALL PORTIONS AND AN INTURNED TOP EDGE PORTION DEFINING AN OPENING IN THE TOP OF SAID CASING; ALUMINUM PLATE MEANS HAVING AN ALUMINUM OXIDE COATING ON OPPOSITE SURFACES THEREOF; AN UNCOATED METAL PLATE; INSULATION MEANS CONNECTED ABOUT THE PERIMETER EDGES OF SAID ALUMINUM PLATE MEANS AND UNCOATED METAL PLATE AND CONNECTING SAID PLATE AND PLATE MEANS IN SUPERIMPOSED SPACED RELATION WITHIN SAID METAL CASING INSULATED FROM SAID BOTTOM WALL PORTION, SIDE WALL PORTIONS AND TOP EDGE PORTION THEROF; SAID ALUMINUM PLATE MEANS CONNECTED IN SPACED RELATION ADJACENT SAID BOTTOM WALL PORTION AND DEFINING A FIRST CHAMBER THEREBETWEEN; SAID UNCOATED METAL PLATE CONNECTED ADJACENT SAID TOP EDGE PORTION AND SPACED FROM SAID ALUMINUM PLATE MEANS AND DEFINING A SECOND CHAMBER THEREBETWEEN; ELECTRICALLY CONDUCTIVE GRANULAR MATERIAL LOOSELY PACKED IN SAID FIRST AND SECOND CHAMBERS SO AS TO BE EASILY MOVABLE UPON VIBRATION OF SAID CASING; SAID METAL CASING CONSTITUTING ONE TERMINAL AND SAID UNCOATED METAL PLATE CONSTITUTING ANOTHER TERMINAL OF SAID SHUNT DEVICE; ELECTRICAL CONNECTIONS CONNECTING SAID TERMINALS IN SHUNT THE FILAMENT OF THE ELECTRIC LAMP TO FORM AN ALTERNATIVE PATH FOR CURRENT FLOW WHEN THE RESISTIVE LOAD OF THE FILAMENT IS REMOVED, AND SAID INTURNED TOP EDGE PORTION MAINTAINING SAID PLATE, PLATE MEANS, GRANULAR MATERIAL AND INSULATION MATERIAL IN THE RESPECTIVE POSITIONS IN SAID METAL CASING.