Transducer and housing assembly

Claim 1

IN AN ULTRASONIC DETECTOR ADAPTED TO BE MOUNTED ON A SUPPORT ADJACENT A ROADWAY FOR THE DETECTION OF VEHICLES WITHIN A DEFINED ZONE, AN ELECTRO-ACOUSTIC TRANSDUCER OF THE TYPE WHICH UTILIZES A HORN LOADED DIAPHRAGM FOR TRANSMISSION OR RECEPTION OF A GENERALLY DIVERGENT BEAM OF ULTRASONIC WAVES, SAID TRANSDUCER HAVING A SUBSTANTIALLY CYLINDRICAL END PORTION AND AN OUTWARDLY DIRECTED FLANGED PORTION, A HOUSING HAVING AN OPENING AND A PORTION SPACED THEREFROM ADAPTED TO BE CONNECTED TO SAID SUPPORT TO LOCATE SAID HOUSING IN RELATION TO SAID ROADWAY SO THAT SAID BEAM IS DIRECTED THROUGH SAID OPENING IN SAID HOUSING AND TOWARD SAID DEFINED ZONE, AND MOUNTING MEANS FOR SUPPORTING SAID TRANSDUCER WITHIN SAID HOUSING, SAID MEANS COMPRISING A RELATIVELY THIN RESILIENT BUT SUBSTANTIALLY RIGID DISC OF PLASTIC MATERIAL OF SOUND AND VIBRATION DAMPENING CHARACTERISTIC, SAID DISC HAVING A SUBSTANTIALLY CENTRAL OPENING AND AN INNER FLANGE FORMED INTEGRALLY WITH SAID DISC AND DISPOSED COAXIALLY WITH RESPECT TO SAID OPENING, MEANS FOR RELEASABLY CONNECTING THE PERIPHERY OF SAID DISC TO A SUBSTANTIALLY CENTRAL PORTION OF SAID HOUSING, SAID CYLINDRICAL PORTION OF SAID TRANSDUCER BEING TELESCOPICALLY RECEIVED WITHIN THE FLANGED PORTION OF SAID DISC SO THAT THE FLANGED PORTION OF SAID TRANSDUCER IS SUPPORTED ON SAID DISC, AND MEANS COMPRISING A FASTENING CLAMP THAT IS RECEIVED IN SURROUNDING RELATION TO THE FLANGED PORTION OF SAID DISC TO BIND THE TRANSDUCER THERETO FOR RELEASABLY MOUNTING SAID TRANSDUCER ON SAID DISC.