GB160223A - Improvements in telephonic and like apparatus - Google Patents
Improvements in telephonic and like apparatusInfo
- Publication number
- GB160223A GB160223A GB2858219A GB2858219A GB160223A GB 160223 A GB160223 A GB 160223A GB 2858219 A GB2858219 A GB 2858219A GB 2858219 A GB2858219 A GB 2858219A GB 160223 A GB160223 A GB 160223A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- currents
- valve
- resonance
- potential
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
-
- 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
-
- 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
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
-
- 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
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
- H04R9/047—Construction in which the windings of the moving coil lay in the same plane
- H04R9/048—Construction in which the windings of the moving coil lay in the same plane of the ribbon type
-
- 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
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- 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
-
- 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
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- Amplifiers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Measuring Magnetic Variables (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Headphones And Earphones (AREA)
- Circuit For Audible Band Transducer (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Telephone Function (AREA)
- Level Indicators Using A Float (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
160,223. Sykes, A. F. Nov. 18, 1919. Thermionic amplifiers. - For the production of gramophone or phonograph records, sounds are converted into electric currents bv a non- resonant detector, and the currents, after being amplified by thermionic valves and distorted to give the higher frequencies their proper proportionate effect, are recorded bv a non-resonant electromagneticallyoperated stylus. Alternatively, the recorder may possess mechanical resonance, this being corrected by circuit arrangements which correspondingly attenuate the currents in the resonance range of frequencies. In most of the forms described, the non-resonant detector or recorder consists of an oscillatory .coil mounted with negligible elastic restraint (e.g. on a freely-suspended diaphragm) in a magnetic field. The potential induced in a detector of this kind is a true copy of the displacement-variations of the actuating sound-wave, but for a given amplitude of pressure-variation of the sound-wave the potential induced is inversely proportional to the frequency. Moreover, for a given amplitude of current-variation the movement of the recorder is inversely proportional to the square of the frequency. Thus, accordingly as it is desired to produce a record agreeing with the displacement or pressure curve of the original sound, it is necessary to amplify the currents in the ratio of the second or third power of their frequency. This is effected by suitable arrangements of the thermionic va.lve circuits. Similar methods may be used to correct for other factors, such as the resistance of the wax to the cutting- too]. In the arrangement shown in Fig. II (31210/19), the detecting-coil 6 delivers currents to a condenser 18, of relatively large impedance, through a resistance 17, which is bridged across the input terminals 19 of a cascade of amplifying-valves. For given amplitudes of induced potential-variation, the currents taken by the condenser (and therefore the potentials across the terminals 19) are proportional to the frequency, so that this arrangement amplifies each harmonic component in proportion to its frequency, and thus gives a current which is a true copy of the sound pressure-wave. In the arrangement shown in Fig. III (3053/20), the same principle is made use of in two stages; the potential across a resistance 24 in series with the second condenser 23 controls a valve-amplifier 25 which supplies current to the recording-coil 1 through a transformer 26. This arrangement amplifies each harmonic component in proportion to the square of its frequency. A resistance shunt 27 transmits a fraction of the microphone current in undistorted form to compensate for the resistance of the wax blank. In the arrangement shown in Fig. IV (3053/20), currents from the detecting-coil 32 are magnified by a valve 37 (or by a cascade of valves) and supplied to a valve 42, the output circuit of which includes an inductance 43 of small impedance relative to that of the plate circuit. For given strength of current, the potential across this inductance is proportional to the frequency, and this potential is supplied to the next valve 44, which controls the valve 46 in the same way. Consequently, in the current supplied to the valve 46, each harmonic component is amplified in proportion to the square of its frequency. In the arrangement shown in Fig. II (28528/20), currents from the detecting-coil 29, 32 are amplified by valves 42, 44, 46 before being supplied to the recorder, which in this case possesses a. mechanical resonance frequency of its own. To correct for this resonance, the primary of the transformer 57, which supplies the valve 46, is shunted by a tuned circuit 45, 55, 56. which is arranged to have the same resonance frequency and the same degree of damping as the recorder. The same method may be used to correct for several distinct resonance frequencies, or to compensate a record for the resonance peculiarities of a reproducing gramophone &c. The sound-conveying currents may modulate carrier waves and may be transmitted wirelessly.
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2858219A GB160223A (en) | 1919-11-18 | 1919-11-18 | Improvements in telephonic and like apparatus |
FR536796D FR536796A (en) | 1919-11-18 | 1921-01-31 | Device for recording sounds |
DES55440D DE400634C (en) | 1919-11-18 | 1921-02-01 | Device for recording sounds by electromagnetic means |
GB2286021A GB190759A (en) | 1919-11-18 | 1921-08-29 | Improvements in electrc-magnetic apparatus for recording sound |
GB3390721A GB194424A (en) | 1919-11-18 | 1921-12-16 | Improvements in electro-magnetic apparatus for recording sound |
GB1687423A GB220420A (en) | 1919-11-18 | 1923-06-28 | Improved electro-magnetic means for transmitting and reproducing sound |
GB2168924A GB227391A (en) | 1919-11-18 | 1923-07-03 | Improvements in or relating to electric apparatus for the reproduction of recorded sounds |
GB1727523A GB222924A (en) | 1919-11-18 | 1923-07-03 | Improvements in electric sound reproducing apparatus |
GB2481023A GB227162A (en) | 1919-11-18 | 1923-10-05 | Improvements in electro-magnetic transmitters and receivers for reproducing sound |
GB960724A GB236313A (en) | 1919-11-18 | 1924-04-15 | Improvements in electro-magnetic transmitters and receivers for reproducing sound |
FR29316D FR29316E (en) | 1919-11-18 | 1924-06-27 | Device for recording sounds |
FR29391D FR29391E (en) | 1919-11-18 | 1924-07-21 | Device for recording sounds |
GB1436327A GB301437A (en) | 1919-11-18 | 1927-05-27 | Improvements in electrodynamic loudspeakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2858219A GB160223A (en) | 1919-11-18 | 1919-11-18 | Improvements in telephonic and like apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB160223A true GB160223A (en) | 1921-03-18 |
Family
ID=40451138
Family Applications (9)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2858219A Expired GB160223A (en) | 1919-11-18 | 1919-11-18 | Improvements in telephonic and like apparatus |
GB2286021A Expired GB190759A (en) | 1919-11-18 | 1921-08-29 | Improvements in electrc-magnetic apparatus for recording sound |
GB3390721A Expired GB194424A (en) | 1919-11-18 | 1921-12-16 | Improvements in electro-magnetic apparatus for recording sound |
GB1687423A Expired GB220420A (en) | 1919-11-18 | 1923-06-28 | Improved electro-magnetic means for transmitting and reproducing sound |
GB1727523A Expired GB222924A (en) | 1919-11-18 | 1923-07-03 | Improvements in electric sound reproducing apparatus |
GB2168924A Expired GB227391A (en) | 1919-11-18 | 1923-07-03 | Improvements in or relating to electric apparatus for the reproduction of recorded sounds |
GB2481023A Expired GB227162A (en) | 1919-11-18 | 1923-10-05 | Improvements in electro-magnetic transmitters and receivers for reproducing sound |
GB960724A Expired GB236313A (en) | 1919-11-18 | 1924-04-15 | Improvements in electro-magnetic transmitters and receivers for reproducing sound |
GB1436327A Expired GB301437A (en) | 1919-11-18 | 1927-05-27 | Improvements in electrodynamic loudspeakers |
Family Applications After (8)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2286021A Expired GB190759A (en) | 1919-11-18 | 1921-08-29 | Improvements in electrc-magnetic apparatus for recording sound |
GB3390721A Expired GB194424A (en) | 1919-11-18 | 1921-12-16 | Improvements in electro-magnetic apparatus for recording sound |
GB1687423A Expired GB220420A (en) | 1919-11-18 | 1923-06-28 | Improved electro-magnetic means for transmitting and reproducing sound |
GB1727523A Expired GB222924A (en) | 1919-11-18 | 1923-07-03 | Improvements in electric sound reproducing apparatus |
GB2168924A Expired GB227391A (en) | 1919-11-18 | 1923-07-03 | Improvements in or relating to electric apparatus for the reproduction of recorded sounds |
GB2481023A Expired GB227162A (en) | 1919-11-18 | 1923-10-05 | Improvements in electro-magnetic transmitters and receivers for reproducing sound |
GB960724A Expired GB236313A (en) | 1919-11-18 | 1924-04-15 | Improvements in electro-magnetic transmitters and receivers for reproducing sound |
GB1436327A Expired GB301437A (en) | 1919-11-18 | 1927-05-27 | Improvements in electrodynamic loudspeakers |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE400634C (en) |
FR (3) | FR536796A (en) |
GB (9) | GB160223A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2562709A (en) * | 2017-04-04 | 2018-11-28 | Arthur Brice Richard | Operation of an electrodynamic gramophone pickup as a displacement-sensitive transducer by detecting short-circuit current |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL55929B (en) * | 1930-03-10 | |||
NL61306C (en) * | 1937-10-07 | |||
BE472060A (en) * | 1945-12-11 | |||
US3164686A (en) * | 1959-09-21 | 1965-01-05 | Tibbetts Industries | Electrodynamic transducer |
FR1269138A (en) * | 1960-06-23 | 1961-08-11 | Improvements to loudspeakers, microphones, and similar electrodynamic devices | |
EP0065883A3 (en) * | 1981-05-26 | 1984-01-11 | Celestion International Limited | Ring radiator for loudspeakers |
GB2123651B (en) * | 1982-06-29 | 1986-08-06 | Stanley Kelly | Transducers |
DE3507726A1 (en) * | 1985-03-05 | 1986-09-11 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | MEMBRANE FOR PLANAR SPEAKER |
DE19610997B4 (en) * | 1996-03-21 | 2006-07-13 | Sennheiser Electronic Gmbh & Co. Kg | Electrodynamic transducer with magnetic gap sealing and hearing aid |
DE10036100C1 (en) | 2000-07-25 | 2002-02-14 | Adidas Int Bv | Sports shoe has inner sole layer with openings, support layer with second openings that overlap first openings and outer sole layer with at least one opening that overlaps second openings |
-
1919
- 1919-11-18 GB GB2858219A patent/GB160223A/en not_active Expired
-
1921
- 1921-01-31 FR FR536796D patent/FR536796A/en not_active Expired
- 1921-02-01 DE DES55440D patent/DE400634C/en not_active Expired
- 1921-08-29 GB GB2286021A patent/GB190759A/en not_active Expired
- 1921-12-16 GB GB3390721A patent/GB194424A/en not_active Expired
-
1923
- 1923-06-28 GB GB1687423A patent/GB220420A/en not_active Expired
- 1923-07-03 GB GB1727523A patent/GB222924A/en not_active Expired
- 1923-07-03 GB GB2168924A patent/GB227391A/en not_active Expired
- 1923-10-05 GB GB2481023A patent/GB227162A/en not_active Expired
-
1924
- 1924-04-15 GB GB960724A patent/GB236313A/en not_active Expired
- 1924-06-27 FR FR29316D patent/FR29316E/en not_active Expired
- 1924-07-21 FR FR29391D patent/FR29391E/en not_active Expired
-
1927
- 1927-05-27 GB GB1436327A patent/GB301437A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2562709A (en) * | 2017-04-04 | 2018-11-28 | Arthur Brice Richard | Operation of an electrodynamic gramophone pickup as a displacement-sensitive transducer by detecting short-circuit current |
Also Published As
Publication number | Publication date |
---|---|
FR29391E (en) | 1925-07-25 |
GB301437A (en) | 1928-11-27 |
GB227391A (en) | 1925-01-05 |
GB220420A (en) | 1924-08-21 |
GB236313A (en) | 1925-07-09 |
GB190759A (en) | 1922-12-29 |
FR29316E (en) | 1925-07-24 |
GB227162A (en) | 1925-01-05 |
GB194424A (en) | 1923-03-15 |
GB222924A (en) | 1924-10-03 |
DE400634C (en) | 1924-08-16 |
FR536796A (en) | 1922-05-09 |
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