Signal lamp

Claim 1

A SIGNAL LAMP COMPRISING A HOUSING HAVING A BACK WALL WITH AN OPENING THERETHROUGH, A LAMP SOCKET GROUNDING MEMBER MOUNTED ON THE BACK WALL AND A LAMP SOCKET MOUNTED ON THE MEMBER, SAID MEMBER HAVING MEANS FOR RECEIVING LAMP MOUNTING ELEMENTS THAT PROJECT THROUGH THE BACK WALL FOR GROUNDING THE LAMP SOCKET THROUGH THE MEMBER AND ELEMENTS, SAID LAMP SOCKET HAVING ONE END OVER THE OPENING, AN ELECTRIC LAMP WITHIN THE SOCKET AND PROJECTING FROM THE OTHER END THEREOF, LUGS ON THE BULB PROJECTING INTO BAYONET SLOTS ON THE SOCKET, SAID BULB HAVING ELECTRIC CONTACT MEANS AT ITS END WITHIN THE SOCKET, A TERMINAL DISK WITHIN THE SOCKET AND HAVING ELECTRICAL CONTACT MEANS IN ENGAGEMENT WITH THE CONTACT MEANS OF THE BULB, AND A RUBBER-LIKE SPRING WITHIN THE SOCKET AND AGAINST THE TERMINAL DISK FOR BIASING THE BULB LUGS IN REMOVABLE BUT RETENTIVE POSITIONS AGAINST THE ENDS OF THE SLOTS, SAID RUBBER-LIKE SPRING EXTENDING THROUGH SAID ONE END OF THE SOCKET AND SAID MEMBER AND CLOSING SAID BACK WALL OPENING, AND INSULATED ELECTRIC CONDUCTOR MEANS SECURED TO THE CONTACT MEANS OF THE DISK AND EXTENDING THROUGH THE RUBBER-LIKE SPRING AND SAID BACK WALL OPENING, THE PART OF THE RUBBER-LIKE SPRING THAT IS ADJACENT TO THE TERMINAL DISK HAVING A CLEARANCE SPACE FOR LOOSE FITTING RECEPTION OF THE CONDUCTOR MEANS AND THE PART OF THE SPRING THAT CLOSES THE BACK WALL OPENING SURROUNDING AND GRIPPING THE CONDUCTOR MEANS, THEREBY TO FORM SUBSTANTIALLY A SEAL AT SAID BACK WALL OPENING.