GB948976A - Improvements in or relating to earphones - Google Patents
Improvements in or relating to earphonesInfo
- Publication number
- GB948976A GB948976A GB7516/61A GB751661A GB948976A GB 948976 A GB948976 A GB 948976A GB 7516/61 A GB7516/61 A GB 7516/61A GB 751661 A GB751661 A GB 751661A GB 948976 A GB948976 A GB 948976A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- electrode
- perforated
- back plate
- mounting ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/02—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1008—Earpieces of the supra-aural or circum-aural type
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
948,976. Electrostatic transducers. APEX CORPORATION. March 1, 1961 [March 11, 1960], No. 7516/61. Heading H4J. An electrostatic earphone has perforated electrodes, a light-weight diaphragm, and a perforated back plate, so that sounds produced externally may pass through the earphone. As shown in Figs. 3 and 5, the diaphragm is made of a light-weight material with a resistivity of about 10<SP>10</SP> ohms/square, is about 0.0005 inches in thickness and is clamped against the conductively coated surface of an insulating mounting ring 36 by a rubber ring 46 recessed in a second insulating mounting ring 27. Each mounting ring carries a perforated electrode 21, 24, which may be of coated insulator or of metal. Mounting ring 27 carries an insulating back plate 18 which is perforated and mounts a pivot bar 16 in bearings 17, the bar 16 being fixed to an adjustable stirrup 13 of a head harness (see Fig. 1, not shown). A sound absorbing pad 20 lies between the back plate 18 and the electrode 21 to damp out resonances. A foam rubber ear cushion 52 surrounds the mounting rings and covers part of the electrode 24. Leads 56, 57, 58, clamped to the back plate 18 by a bracket 63 connect with the electrodes 21 and 24 or their conductive coatings and to the diaphragm. The receiver may be driven by the secondary of a transformer, the ends of which connect with the electrodes and a centre tap from which connects with the diaphragm via a polarizing potential source and a damping resistor. The diaphragm may be coated with an anti-static substance such as stannous chloride to ensure charge migration. A valve circuit to drive the receiver is shown in Fig. 7, input being applied by way of triode and pentode shapes. Only one electrode is actively driven, the other being earthed. The diaphragm is polarized from the 700-volt supply 127. To compensate for a diminishing response at high frequencies, feed-back is taken from the active electrode of the receiver to the cathode of the triode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14402A US3084229A (en) | 1960-03-11 | 1960-03-11 | Electrostatic earphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB948976A true GB948976A (en) | 1964-02-05 |
Family
ID=21765277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7516/61A Expired GB948976A (en) | 1960-03-11 | 1961-03-01 | Improvements in or relating to earphones |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3084229A (en) |
| CH (1) | CH388384A (en) |
| DE (1) | DE1173946B (en) |
| FR (1) | FR1283013A (en) |
| GB (1) | GB948976A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164647A (en) * | 1998-11-25 | 2000-12-26 | Chee; Ah-Him Chong Toc | Casino wheel game system |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3497637A (en) * | 1967-11-13 | 1970-02-24 | Intelectron Corp | Transducer for stimulation of facial nerve system with r-f energy |
| NL6804424A (en) * | 1968-04-01 | 1969-10-01 | ||
| US3654403A (en) * | 1969-05-01 | 1972-04-04 | Chester C Pond | Electrostatic speaker |
| US3632903A (en) * | 1970-10-28 | 1972-01-04 | Koss Electronics Inc | Electrostatic headphone |
| US3783202A (en) * | 1971-01-07 | 1974-01-01 | Pond C | Speaker system and electrostatic speaker |
| US4260575A (en) * | 1979-11-05 | 1981-04-07 | Koss Corporation | Method for molding ear cushions |
| JPS57125600A (en) * | 1981-02-21 | 1982-08-04 | Bulgarsko Radio | Electrostatic acoustic converter |
| US5210792A (en) * | 1990-08-13 | 1993-05-11 | Matsushita Electric Industrial Co., Ltd. | Ear-hang type headset |
| JP4103877B2 (en) * | 2004-09-22 | 2008-06-18 | セイコーエプソン株式会社 | Electrostatic ultrasonic transducer and ultrasonic speaker |
| TWI454156B (en) | 2008-10-31 | 2014-09-21 | Htc Corp | Electronic device with electret electro-acoustic transducer |
| US8411882B2 (en) * | 2008-10-31 | 2013-04-02 | Htc Corporation | Electronic device with electret electro-acoustic transducer |
| TWI405474B (en) * | 2008-12-31 | 2013-08-11 | Htc Corp | Flexible luminescent electro-acoustic transducer and electronic device using the same |
| DE102014221583B4 (en) * | 2014-10-23 | 2020-11-12 | Sennheiser Electronic Gmbh & Co. Kg | Electroacoustic transducer and receiver |
| CN106341748A (en) * | 2015-07-17 | 2017-01-18 | 富祐鸿科技股份有限公司 | Electrostatic earphone sounding structure |
| US10231060B2 (en) * | 2015-12-23 | 2019-03-12 | Sennheiser Electronic Gmbh & Co. Kg | Electrostatic headphones |
| JP1740347S (en) * | 2021-07-15 | 2023-03-29 | headphone parts |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1646628A (en) * | 1927-10-25 | James g | ||
| US1586140A (en) * | 1924-12-09 | 1926-05-25 | Ralph W S Bonnette | Receiver for radio and telephone apparatus |
| US1631593A (en) * | 1925-03-27 | 1927-06-07 | Photomaton Inc | Photographic apparatus |
| US1622039A (en) * | 1925-05-02 | 1927-03-22 | Frederick W Lee | Apparatus for and method of reproducing sound |
| US1760896A (en) * | 1926-08-07 | 1930-06-03 | Chilowsky Constantin | Apparatus for the production of sounds from electric current and inversely |
| US1764008A (en) * | 1928-10-24 | 1930-06-17 | United Reproducers Patents Cor | Push-pull electrostatic sound reproducer |
| US1760920A (en) * | 1929-03-30 | 1930-06-03 | American Telephone & Telegraph | Testing system |
| US1930518A (en) * | 1930-07-30 | 1933-10-17 | Westinghouse Electric & Mfg Co | Electrostatic loud speaker |
| AT129683B (en) * | 1930-08-21 | 1932-09-10 | Siemens Ag | Electrodynamic microphone. |
| FR775717A (en) * | 1934-04-05 | 1935-01-08 | Siemens Ag | Vibration system for hearing devices |
| CH195377A (en) * | 1934-12-29 | 1938-01-31 | Bell Telephone Mfg | Acoustic device. |
| US2092762A (en) * | 1935-03-19 | 1937-09-14 | Rca Corp | Variable condenser for modulation |
| US2200604A (en) * | 1935-10-31 | 1940-05-14 | Indemse Corp | Timepiece regulating system and method |
| DK55033C (en) * | 1936-10-05 | 1938-08-01 | Niels Poul Robert Jarnak | Earpiece for Phones or Voicepiece for Microphones. |
| US2509310A (en) * | 1948-02-03 | 1950-05-30 | George L Carrington | Microphone or receiver of the condenser type |
| US2603724A (en) * | 1948-10-30 | 1952-07-15 | Rca Corp | Sound translating device arranged to eliminate extraneous sound |
| US2622159A (en) * | 1950-03-11 | 1952-12-16 | Sydney K Herman | Ear pad for earpieces |
| DE878964C (en) * | 1951-07-25 | 1953-06-08 | Siemens Ag | Horns for telephones |
-
1960
- 1960-03-11 US US14402A patent/US3084229A/en not_active Expired - Lifetime
-
1961
- 1961-03-01 DE DEA36850A patent/DE1173946B/en active Pending
- 1961-03-01 GB GB7516/61A patent/GB948976A/en not_active Expired
- 1961-03-07 FR FR854803A patent/FR1283013A/en not_active Expired
- 1961-03-09 CH CH286961A patent/CH388384A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164647A (en) * | 1998-11-25 | 2000-12-26 | Chee; Ah-Him Chong Toc | Casino wheel game system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1173946B (en) | 1964-07-16 |
| FR1283013A (en) | 1962-01-27 |
| US3084229A (en) | 1963-04-02 |
| CH388384A (en) | 1965-02-28 |
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