| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 81 | Intercom embodying tap transducers | US648565 | 1976-01-12 | US4057688A | 1977-11-08 | Gerard J. O'Brien, deceased; by Catherine H. O'Brien, executrix |
| An intercom system having a pair of interconnected devices, each of which has a speaker, a tap transducer, a power source and switch means, so that when they are connected together electrically, each device may be used as a transmitter or as a received, with the tap transducer in each case forming part of an electrical circuit serving both to receive and transmit signalling and sound signals, such as voice or other speech sounds. A detection device is provided for insuring that the intercom operates in that orientation thereof which provides optimum operating characteristics. | ||||||
| 82 | Carbon microphone | US39959873 | 1973-09-21 | US3859478A | 1975-01-07 | CRAGG WILLIAM DONALD; LAWSON ANTHONY NEWTON; STERLING HENLEY FRANK |
| This relates to a carbon microphone in which the carbon granules will not pack. This is accomplished by a mixture of carbon granules and aggregated particles of a dry powder lubricant such as a silica material. The powder lubricant form individual masses of between one and 10 microns in size and is not to exceed 2 percent by weight of the mixture.
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| 83 | Hollow carbonaceous microspheres suitable for use in carbon microphones | US21375171 | 1971-12-29 | US3835266A | 1974-09-10 | AMAGI Y; URAWA M; SHIIKI Z |
| Hollow carbon microspheres suitable for use in a carbon microphone. A process for producing hollow carbon microspheres for use in carbon microphones. A carbon microphone containing hollow carbon microspheres.
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| 84 | Semiconductor stress transducer | US3450570 | 1970-05-04 | US3673354A | 1972-06-27 | ODA FUJIO; OBATA SHUICHI |
| A semiconductor stress transducer having a pair of spaced electrodes disposed on an electrically insulating thin-film base of a flexible nature, a semiconductor piezo-resistive film being evaporated across the electrodes, means for applying an external stress to the evaporated semiconductor film so that a change in the external stress causes a change in the tension of the semiconductor film, and means for deriving an electrical signal from the electrodes due to a change in the internal resistance of the semiconductor film response to the change in the externally applied stress.
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| 85 | Selenium-tellurium transducer employing piezoresistance effect | US3624430D | 1970-09-18 | US3624430A | 1971-11-30 | MIZUSHIMA YOSHIHIKO; TORU OCHI; SEKI MASAHIRO |
| The piezoresistance coefficient of a Se-Te alloy is 50-60 times those of germanium and silicon and a few times higher than those of selenium and tellurium. The invention provides a mechanoelectric transducer employing the piezoresistance effect of a vacuum deposited Se-Te alloy film.
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| 86 | Formation of expanded silica spheres | US53415255 | 1955-09-13 | US2883347A | 1959-04-21 | FISHER JOSEPH R; RIGTERINK MERLE D |
| 87 | Microphonic material | US6278636 | 1936-02-07 | US2151083A | 1939-03-21 | CHRISTENSEN CARL J; GOUCHER FREDERICK S; WEHE HERMAN G |
| 88 | Resistance varying material | US57434431 | 1931-11-11 | US1973703A | 1934-09-18 | GOUCHER FREDERICK S; CHRISTENSEN CARL J |
| 89 | Microphonic material and method of producing the same | US32964528 | 1928-12-31 | US1833640A | 1931-11-24 | FREDERICK FRUTH HAL |
| 90 | Method of producing carbon granules | US26950328 | 1928-04-12 | US1828046A | 1931-10-20 | SAMUEL HOWARD RUSSELL |
| 91 | Method of producing carbon granules | US24301127 | 1927-12-28 | US1827931A | 1931-10-20 | EVANS BLANKENSTEIN EDWARD |
| 92 | Preparation of granular carbon | US3408425 | 1925-06-01 | US1722055A | 1929-07-23 | LOWRY HOMER H |
| 93 | Granular carbon and process of making the same | US1646389D | US1646389A | 1927-10-25 | ||
| 94 | Resistance material and method of manufacturing same | US31044019 | 1919-07-12 | US1403803A | 1922-01-17 | MAXFIELD JOSEPH P; SMITH GEORGE O |
| 95 | Transducer circuit | JP8834995 | 1995-04-13 | JPH07311100A | 1995-11-28 | MAIKERU EFU MATSUTESU; ROBAATO ERU CHIYAO |
| PURPOSE: To improve a function by amplifying differential voltage output from a sensing bridge functionally related to stimulation and outputting the amplified signal. CONSTITUTION: A transducer comprises a sensing bridge 12 provided with resistive arms 14, 16, 18, 20, and the arm 14 (16) is provided with a piezoelectric resistive element 22 (28). A fixed resistive element 34 (36) of the arm 18 (20) connects contact points 26, 32 (24, 30), which are respectively connected to the earth 33, a power source voltage V cc, and operational amplifiers 42, 54. The bridge 12, the amplifier 54, a feedback resistor RF and the like are formed on the same base board so as to be placed inside a pressure system to be measured. In this process, a resistance value of the element 28 is increased when a pressure to the bridge 12 is increased, so that a voltage in the contact point 30 is also increased. On the other hand, a voltage in the contact point 25 is reduced when a resistance value of the element 22 is increased, and a voltage in the contact point 46 is reduced. A voltage difference between the contact points 30, 46, in other words, a differential voltage output of the bridge 12 is amplified by means of the amplifier 54 so as to be outputted as an output signal of a transducer. COPYRIGHT: (C)1995,JPO | ||||||
| 96 | Method of producing conductive cast substance | JP15570084 | 1984-07-27 | JPS6065403A | 1985-04-15 | SAAWAN KUMAA KANNA; ARAN MAIKERU RIONZU; NAZANIERU RICHIYAADO KUITSUKU; MAREI ROBINZU; DEIIN UIRISU TAUNSENDO; KURETASU UORUTAA UIRUKINSU JIY |
| 97 | JPS5937639B2 - | JP737180 | 1980-01-23 | JPS5937639B2 | 1984-09-11 | TAKEDA AKITSU; MIZUSHIMA YOSHIHIKO; OCHI OSAMU; YOSHIKAWA AKIRA; OOGA TOSHIRO; SHIRAI SEIICHI |
| 98 | Membrane for microphone | JP5937883 | 1983-04-06 | JPS58186300A | 1983-10-31 | BUERUNAA FUIDEI; RIHIYARUTO PURIBIIRU; KONRAATO BUORUFU |
| 99 | JPS5829679Y2 - | JP2829378 | 1978-03-06 | JPS5829679Y2 | 1983-06-29 | |
| 100 | Transducer | JP18998381 | 1981-11-27 | JPS5892200A | 1983-06-01 | WADA HIROTO |
| PURPOSE:To obtain a stable characteristic, by applying a voltage to a diaphragm formed with a synthetic resin having elasticity mixed with carbon particles and changing electric signals flowing to the diaphragm via the change in the resistance value of the diaphragm through the compression and expansion of the diaphragm. CONSTITUTION:Sound waves from a sound source drive a condencer microphone unit 18 arranged in front of a protector 16 to output an audio current to the primary winding T1 of a transformer T. Further, the sound waves from the sound source enter a case 11 through a hole 17 and oscillate an oscillation electrode 12. When the oscillation electrode 12 is oscillated, a conductive elastic body 15 of a coil spring fitting one end to an external electrode 14 is compressed and expanded. Since the conductive elastic substance 15 is formed by mixing carbon particles to silicon rubber, it has a good elasticity and a resistance value between both ends of the conductive elastic substance 15 is changed through the expansion and compression, and a current flowing between the external electrodes 13, 14 is changed according to the sound waves. As a result, the audio current flowing between the external electrodes 13, 14 flows to the primary winding T1 of the transformer T. | ||||||
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