GB302274A - Improvements in or relating to electro-acoustic devices such as loud-speakers - Google Patents
Improvements in or relating to electro-acoustic devices such as loud-speakersInfo
- Publication number
- GB302274A GB302274A GB3236828A GB3236828A GB302274A GB 302274 A GB302274 A GB 302274A GB 3236828 A GB3236828 A GB 3236828A GB 3236828 A GB3236828 A GB 3236828A GB 302274 A GB302274 A GB 302274A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- loud
- diaphragm
- speakers
- slotted
- 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
- 230000010355 oscillation Effects 0.000 abstract 1
- 239000011800 void material 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
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/02—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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Electromagnetism (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
302,274. British Thomson-Houston Co., Ltd., (Assignees of Cottrell, M.). Dec. 13, 1927, [Convention date]. Void [Published under Sect. In of the Acts]. Loud-speakers; diaphragms; magnetic instruments.-In a device for the interconversion of mechanical and electrical oscillations, such as a loud-speaker, an armature 7, which passes through a coil 20 and extends between magnet poles 11, 12, is carried by a flexible or resilient member 14 extending in line with the armature and having its extremities anchored to a support 15. A cam 16 is provided for adjusting the tension of the armature, the movement of which is damped by adjustable resilient stops 18, 19. The armature is slotted at its edges to receive lugs 17, Fig. 3, on the inner periphery of the slotted member 14 and is tapered at its lower end for connection through rods 8, 9 and flexible member 10 to the apex of the conical corrugated diaphragm 1. The diaphragm is enclosed at its back by a felt-lined apertured baffle 2 and has its periphery clamped by screws 6 between the baffle 2 and a member 5. A horn may be attached at the base of the diaphragm.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US23977527A | 1927-12-13 | 1927-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB302274A true GB302274A (en) | 1930-04-01 |
Family
ID=22903684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3236828A Expired GB302274A (en) | 1927-12-13 | 1928-11-06 | Improvements in or relating to electro-acoustic devices such as loud-speakers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB302274A (en) |
-
1928
- 1928-11-06 GB GB3236828A patent/GB302274A/en not_active Expired
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