Illuminated signalling unit with light directing means

Claim 1

IN COMBINATION WITH A SIGNALLING UNIT EMPLOYING A PLURALITY OF LAMPS, SAID LAMPS BEING LOCATED ON A SIDE OFF A SIGNALLING PANEL TOWARD A FACE OF THE UNIT IN SOCKETS HAVING ANNULAR, OUTWARDLY EXTENDING FLANGES NEAR THE UPPER ENDS THEREOF, A RESILIENT MEMBER FOR EACH OF SAID LAMPS COMPRISING A CYLINDRICAL WALL HAVING AN ANNULAR FLANGE ON THE LOWER END, SAID LOWER FLANGE EXTENDING INWARDLY TO COOPERATE WITH THE FLANGE OF ONE OF SAID SOCKETS, SAID CYLINDRICAL WALL HAVING A SHOULDER NEAR THE UPPER END THEREOF, A SHIELD EXTENDING UPWARDLY FROM THE UPPER END OF SAID CYLINDRICAL WALL, AND A LIGHT-TRANSMITTING LENS MEMBER EXTENDING FROM AND CLOSING THE UPPER END OF SAID CYLINDRICAL WALL, SAID WALL HAVINGY A DIAMETER SLIGHTLY LESS THAN THAT OF SAID SOCKET FLANGE TO FIT SECURELY THEREWITH AND YET BE CAPABLE OF ROTATION WITH RESPECT TO SAID SOCKET.