Burdwood thermo-beacon

Claim 1

A TEMPERATURE WARNING DEVICE COMPRISING A BASE HAVING A CENTRAL HOLD THERETHROUGH AND A NARROW CIRCULAR GROOVE IN ITS UPPER FACE CONCENTRIC WITH SAID HOLE, A DISK ABOVE SAID BASE HAVING A CENTRAL HOLE THERETHROUGH AND CONCENTRIC NARROR CIRCULAR GROOVES IN ITS BOTTOM AND TOP FACES, A CYLINDRICAL WIRE NET BETWEEN SAID BASE AND DISK FORMING THEREWITH A LOWER CHAMBER, THE LOWER EDGE OF SAID NET FITTING IN THE GROOVE IN SAID BASE, THE UPPER EDGE OF SAID NET FITTING IN THE GROOVE IN THE BOTTOM OF SAID DISK, SAID DISK HAVING TWO ELECTRIC LAMP SOCKETS MOUNTED THEREIN, A LIGHT BULB IN EACH SAID SOCKET, A SECOND DISK ABOVE THE FIRST SAID DISK, SAID SECOND DISK HAVING A CENTRAL HOLE THERETHROUGH AND A NARROW CIRCULAR GROOVE IN ITS BOTTOM FACE CONCENTRIC WITH SAID HOLE, AN APPROXIMATELY CYLINDRICAL LENS BETWEEN SAID DISKS FORMING THEREWITH AN UPPER CHAMBER, THE ENDS OF SAID LENS BEING ENGAGED IN THE GROOVES IN THE TOP FACE OF THE FIRST DISK AND BOTTOM FACE OF THE SECOND DISK, A VERTICAL TIE ROD EXTENDING THROUGH SAID HOLES TO HOLD SAID BASE AND DISKS IN ASSEMBLED RELATION, TWO THERMOSTATS AND A FLASHER MOUNTED IN SAID LOWER CHAMBER, A PLUG FOR CONNECTING SAID DEVICE TO AN ELECTRIC POWER SUPPLY, AND WIRING CONNECTING BOTH SAID LAMPS TO SAID THERMOSTATS AND PLUG, AND ONE OF SAID LAMPS IN SERIES WITH SAID FLASHER.