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Combined instrument and transducer motor cavities for acoustic instrument

  • US 3,257,516 A
  • Filed: 06/25/1962
  • Issued: 06/21/1966
  • Est. Priority Date: 06/25/1962
  • Status: Expired due to Term
First Claim
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1. IN COMBINATION WITH A HOUSING HAVING A SUBSTANTIALLY SEALED CAVITY HAVING A SOUND PORT THROUGH THE HOUSING, AN ELECTROACOUSTIC TRANSDUCER ASSEMBLY MOVABLY DISPOSED IN SAID CAVITY SO AS TO FORM AN INTERSPACE THEREAROUND, SAID TRANSDUCER ASSEMBLY COMPRISING A DIAPHRAGM, A WALL SUBSTANTIALLY SEALED TO THE PERIPHERY OF THE DIAPHRAGM TO FORM A FRONT CAVITY ON ONE SIDE THEREOF, A MOTOR MOUNTED ON THE OTHER SIDE OF THE DIAPHRAGM AND DRIVINGLY CONNECTED THERETO, THE SPACE OCCUPIED BY THE MOTOR BEING IN COMMUNICATION WITH THE SEALED CAVITY OF THE HOUSING, A SOUND PORT INTO THE FRONT CAVITY OF THE TRANSDUCER ASSEMBLY, A DUCT CONNECTING THE SOUND PORTS OF THE HOUSING AND THE FRONT CAVITY TO EACH OTHER;

  • AND FLEXIBLE MEANS DISPOSED IN THE INTERSPACE FOR MAINTAINING THE CAVITY OF THE HOUSING AT A SUBSTANTIALLY CONSTANT VOLUME DURING MOVEMENTS OF THE TRANSDUCER ASSEMBLY RELATIVE TO THE WALLS OF THE CAVITY.

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