Microphone provided with a cylindrically shaped microphone cartridge
Patent 3944759 Issued on March 16, 1976. Estimated Expiration Date: 
March 16, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 16, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2567889 3108162 3174129 3436495 3624312 3651286 3816671 InventorApplicationNo. 419431 filed on 11/27/1973US Classes:381/355, Housed microphone381/191, Having electrostatic element (e.g., electret, vibrating plate)381/361, Mounting or support381/368On shock absorbing supportExaminersPrimary: Claffy, Kathleen H.Assistant: Popek, Joseph A. Attorney, Agent or FirmInternational ClassH04R 1/08 (20060101)Foreign Application Priority Data1972-12-06 NLAbstractA microphone provided with a suspension diaphragm which serves to support a freely suspended microphone cartridge, preferably of the electret type, the suspension diaphragm being substantially coplanar with the acoustic diaphragm of the microphone cartridge. At least one groove entirely closes acoustically the air-gap surrounding the freely suspended microphone cartridge. The groove is further provided with lug-shaped flanges, one for clamping the microphone cartridge and the other for suspension from a frame, mount or microphone case. The suspension diaphragm is particularly suitable for light-weight microphone cartridges. | |
