Headset/radio auto sensing jack
December 2, 2017. 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 ReferencesPost-auricle contoured headset for two-way voice communication Programmable telephone system Helmet-supported radio transceiver and broadcast receiver system Portable cordless telephone transceiver-radio receiver Communications headset Impedance sensing anti-theft device Miniaturized headset for two-way voice communication 5117461 Tape recording and/or reproducing apparatus Method of making a telephone headset InventorApplicationNo. 982943 filed on 12/02/1997US Classes:381/74, HEADPHONE CIRCUITS455/569.1, Hands-free or loudspeaking arrangement455/575.2HeadgearExaminersPrimary: Isen, Forester W.Assistant: Pendleton, Brian T. International ClassesH04B 001/40H04B 001/38 AbstractA headset/headphone sensing jack (203, 208, 210). A two-channel sensing circuit (210) is provided which detects whether a headphone (101) or headset (103) is installed. By employing an impedance sensing circuit (210), it is possible to use a single common 2.5 mm jack (120) for both radio and telephony operation. Formerly, two separate jacks would be required for both functions. An electronic device (50) according to the present invention is further capable of switching between AM/FM radio and telephone modes depending on whether a particular headpiece (101, 103) is installed.Field of SearchCOMPOSITE SUBSTATION OR TERMINAL (E.G., HAVING CALCULATOR, RADIO)MISCELLANEOUS Body supported (e.g., headgear) Specified terminal configuration (e.g., novelty type) HEADPHONE CIRCUITS HAVING CIRCUIT INTERRUPTING PROVISION EFFECTED BY MATING OR HAVING "DEAD" CONTACT ACTIVATED AFTER MATING Connection indicating provision | |
