GB510297A - Improvements in or relating to gramophone pick-ups and like devices - Google Patents
Improvements in or relating to gramophone pick-ups and like devicesInfo
- Publication number
- GB510297A GB510297A GB22052/38A GB2205238A GB510297A GB 510297 A GB510297 A GB 510297A GB 22052/38 A GB22052/38 A GB 22052/38A GB 2205238 A GB2205238 A GB 2205238A GB 510297 A GB510297 A GB 510297A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- bearing points
- point
- insulating
- bearing
- 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
- 239000004020 conductor Substances 0.000 abstract 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 229910052594 sapphire Inorganic materials 0.000 abstract 1
- 239000010980 sapphire Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
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
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Telephone Set Structure (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
510,297. Gramophone pick-ups ; microphones. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. July 25, 1938, No. 22052. Convention date, July 28, 1937. [Class 40(iv)] In a device for transforming mechanical vibrations into electrical oscillations comprising a conductor supported at two bearing points and surrounded by a magnetic field which is directed substantially at right angles to the line joining the bearing points, the conductor is extended beyond one of the bearing points to provide a point of application of a driving force in a direction substantially perpendicular to the longitudinal axis of the conductor which is set into vibration as a whole in a direction inclined to the direction of the magnetic field and with nodal points formed at the bearing points. The conductor 25, which may be in the form of a strip, is mounted between polepieces 11, 12 of magnet steel soldered to a softiron ring 10 enclosed in a cylindrical insulating casing 13 which is provided at the top with an insulating ring 15 and a cover 16 having a central hole in which one end of the conductor 25 is soldered. The lower end of the casing is closed by an insulating ring 14 and a thin diaphragm 24 of copper clamped in a recess in a member 17 and providing the second bearing point for the conductor 25 which is formed with an extension carrying a tungsten or sapphire point 26. Two rods 27, 28 threaded into the cover members 16, 17 form the connecting conductors for the device and are joined by an insulating strip 31. When the device is employed as a microphone, the extended end of the conductor 25 is connected to a diaphragm.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE207878X | 1937-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB510297A true GB510297A (en) | 1939-07-31 |
Family
ID=5793934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22052/38A Expired GB510297A (en) | 1937-07-28 | 1938-07-25 | Improvements in or relating to gramophone pick-ups and like devices |
Country Status (6)
Country | Link |
---|---|
US (1) | US2240918A (en) |
BE (1) | BE429396A (en) |
CH (1) | CH207878A (en) |
FR (1) | FR841322A (en) |
GB (1) | GB510297A (en) |
NL (1) | NL54031C (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2473650A (en) * | 1943-06-10 | 1949-06-21 | Zenith Radio Corp | Phonograph pickup with mechanical filter |
US2547361A (en) * | 1947-05-19 | 1951-04-03 | Donald J Baker | Pickup head using torsional mount for armatures |
US2622156A (en) * | 1949-01-27 | 1952-12-16 | Donald J Baker | Pickup head with removable armature and stylus assembly |
US2637920A (en) * | 1949-04-28 | 1953-05-12 | Richard H Hallsted | Barrier for motor vehicle parking systems |
NL251609A (en) * | 1959-05-21 |
-
0
- BE BE429396D patent/BE429396A/xx unknown
- NL NL54031D patent/NL54031C/xx active
-
1938
- 1938-06-18 US US214608A patent/US2240918A/en not_active Expired - Lifetime
- 1938-07-25 GB GB22052/38A patent/GB510297A/en not_active Expired
- 1938-07-26 CH CH207878D patent/CH207878A/en unknown
- 1938-07-28 FR FR841322D patent/FR841322A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE429396A (en) | |
US2240918A (en) | 1941-05-06 |
CH207878A (en) | 1939-12-15 |
FR841322A (en) | 1939-05-17 |
NL54031C (en) |
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