GB464386A - Improvements in or relating to microphones - Google Patents
Improvements in or relating to microphonesInfo
- Publication number
- GB464386A GB464386A GB29041/36A GB2904136A GB464386A GB 464386 A GB464386 A GB 464386A GB 29041/36 A GB29041/36 A GB 29041/36A GB 2904136 A GB2904136 A GB 2904136A GB 464386 A GB464386 A GB 464386A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ribbon
- ribbons
- secured
- gaps
- polepieces
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/08—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
464,386. Microphones. ELECTRICAL RESEARCH PRODUCTS, Inc. Oct. 26, 1936, No. 29041. Convention date, July 11. [Class 40 (iv)] A microphone comprises a magnet structure defining a plurality of air gaps located in angular relationship and conductive ribbon diaphragm means disposed in the air gaps and lying in one plane or in substantially the same plane. The diaphragm means may be a single ribbon in the shape of a cross, or two adjacent ribbons crossing each other at right-angles. As shown in Fig. 1 four U-shaped permanent magnets 21 are assembled with two sets of like poles in contact and two pairs of unlike poles separated by blocks 22 of non-magnetic material, e.g. aluminium, secured to an annular supporting plate 23. The magnets carry polepieces 26, 27, 28, 29 forming gaps 31, 32 in which are located ribbons 33, 34 lying in planes spaced at a small distance and supported in blocks 35 of resilient material located in recesses 36 of members 37 secured to the polepieces. In a modification, Fig. 7, the end of each ribbon is supported in a resilient member 39 held in a recess 40 at the apex of an angular or wish-bone spring H secured to a support 42 mounted on the polepiece. The ends of the ribbons 33, 34 are connected in series to a transformer, Fig. 4 (not shown). In a modified arrangement, Figs. 9 to 11 (not shown) and Fig. 13 (not shown), the ribbons form a unitary member in the shape of a cross and, as indicated in Fig. 12, 'the ends of the ribbons 33, 34 are connected to two primary windings 47, 48 of a transformer 46. In a further modification, Fig. 14, the ribbon 55 is circular and the outer polepiece 63 has gaps 62 through which pass corrugated supporting strips 58 having slits 65 covered with silktissue. The ends 56 of the ribbon are brought out to terminals 57, and a space 66 between the conductors is covered with silk tissue. The ribbon diaphragm may be in the form of a hollow square.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US90065A US2164157A (en) | 1936-07-11 | 1936-07-11 | Acoustic device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB464386A true GB464386A (en) | 1937-04-16 |
Family
ID=22221149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB29041/36A Expired GB464386A (en) | 1936-07-11 | 1936-10-26 | Improvements in or relating to microphones |
Country Status (2)
Country | Link |
---|---|
US (1) | US2164157A (en) |
GB (1) | GB464386A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2476396A (en) * | 1939-12-28 | 1949-07-19 | Rca Corp | Magnetic equalization of sensitivity in ribbon microphone assemblies |
BE472060A (en) * | 1945-12-11 | |||
US2552878A (en) * | 1947-09-24 | 1951-05-15 | Electro Voice | Second order differential microphone |
US3564163A (en) * | 1967-04-20 | 1971-02-16 | Robert L Wathams | Ribbon loudspeaker |
US6868166B1 (en) * | 1998-06-10 | 2005-03-15 | Xiafu Zhang | Chord-like vibration loudspeaker |
-
1936
- 1936-07-11 US US90065A patent/US2164157A/en not_active Expired - Lifetime
- 1936-10-26 GB GB29041/36A patent/GB464386A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2164157A (en) | 1939-06-27 |
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